// File: contracts/flattened/Adapter03.sol



// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol



pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol



pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
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;
    }
}

// File: openzeppelin-solidity/contracts/utils/Address.sol



pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(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 {
            // 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);
            }
        }
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol



pragma solidity >=0.6.0 <0.8.0;




/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
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");
        }
    }
}

// File: original_contracts/ITokenTransferProxy.sol

pragma solidity 0.7.5;


interface ITokenTransferProxy {

    function transferFrom(
        address token,
        address from,
        address to,
        uint256 amount
    )
        external;
}

// File: original_contracts/lib/Utils.sol

pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;





interface IERC20Permit {
    function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
}

library Utils {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    address constant ETH_ADDRESS = address(
        0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
    );
    
    uint256 constant MAX_UINT = type(uint256).max;

    /**
   * @param fromToken Address of the source token
   * @param fromAmount Amount of source tokens to be swapped
   * @param toAmount Minimum destination token amount expected out of this swap
   * @param expectedAmount Expected amount of destination tokens without slippage
   * @param beneficiary Beneficiary address
   * 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
   * @param path Route to be taken for this swap to take place

   */
    struct SellData {
        address fromToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address payable beneficiary;
        Utils.Path[] path;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct MegaSwapSellData {
        address fromToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address payable beneficiary;
        Utils.MegaSwapPath[] path;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct SimpleData {
        address fromToken;
        address toToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address[] callees;
        bytes exchangeData;
        uint256[] startIndexes;
        uint256[] values;
        address payable beneficiary;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct Adapter {
        address payable adapter;
        uint256 percent;
        uint256 networkFee;
        Route[] route;
    }

    struct Route {
        uint256 index;//Adapter at which index needs to be used
        address targetExchange;
        uint percent;
        bytes payload;
        uint256 networkFee;//Network fee is associated with 0xv3 trades
    }

    struct MegaSwapPath {
        uint256 fromAmountPercent;
        Path[] path;
    }

    struct Path {
        address to;
        uint256 totalNetworkFee;//Network fee is associated with 0xv3 trades
        Adapter[] adapters;
    }

    function ethAddress() internal pure returns (address) {return ETH_ADDRESS;}

    function maxUint() internal pure returns (uint256) {return MAX_UINT;}

    function approve(
        address addressToApprove,
        address token,
        uint256 amount
    ) internal {
        if (token != ETH_ADDRESS) {
            IERC20 _token = IERC20(token);

            uint allowance = _token.allowance(address(this), addressToApprove);

            if (allowance < amount) {
                _token.safeApprove(addressToApprove, 0);
                _token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
            }
        }
    }

    function transferTokens(
        address token,
        address payable destination,
        uint256 amount
    )
    internal
    {
        if (amount > 0) {
            if (token == ETH_ADDRESS) {
                (bool result, ) = destination.call{value: amount, gas: 10000}("");
                require(result, "Failed to transfer Ether");
            }
            else {
                IERC20(token).safeTransfer(destination, amount);
            }
        }

    }

    function tokenBalance(
        address token,
        address account
    )
    internal
    view
    returns (uint256)
    {
        if (token == ETH_ADDRESS) {
            return account.balance;
        } else {
            return IERC20(token).balanceOf(account);
        }
    }

    function permit(
        address token,
        bytes memory permit
    )
        internal
    {
        if (permit.length == 32 * 7) {
            (bool success,) = token.call(abi.encodePacked(IERC20Permit.permit.selector, permit));
            require(success, "Permit failed");
        }
    }

}

// File: original_contracts/adapters/IAdapter.sol

pragma solidity 0.7.5;



interface IAdapter {

    /**
    * @dev Certain adapters needs to be initialized.
    * This method will be called from Augustus
    */
    function initialize(bytes calldata data) external;

    /**
   * @dev The function which performs the swap on an exchange.
   * @param fromToken Address of the source token
   * @param toToken Address of the destination token
   * @param fromAmount Amount of source tokens to be swapped
   * @param networkFee Network fee to be used in this router
   * @param route Route to be followed
   */
    function swap(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        uint256 networkFee,
        Utils.Route[] calldata route
    )
        external
        payable;
}

// File: original_contracts/lib/aavee/IAavee.sol

pragma solidity 0.7.5;


interface IAaveToken {
    function redeem(uint256 amount) external;
    function underlyingAssetAddress() external view returns(address);

}

interface IAaveV1LendingPool {
    function deposit(
        IERC20 token,
        uint256 amount,
        uint16 refCode
    )
        external
        payable;

}

// File: original_contracts/lib/aavee/Aavee.sol

pragma solidity 0.7.5;




contract Aavee {

    struct AaveeDataV1 {
        address aToken;
    }

    uint16 public immutable refCodeV1;
    address public immutable spender;

    constructor(uint16 _refCode, address _spender) public {
        refCodeV1 = _refCode;
        spender = _spender;
    }

    function swapOnAavee(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        address exchange,
        bytes calldata payload
    )
        internal
    {
        _swapOnAavee(
            fromToken,
            toToken,
            fromAmount,
            exchange,
            payload
        );
    }

    function buyOnAavee(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        address exchange,
        bytes calldata payload
    )
        internal
    {
        _swapOnAavee(
            fromToken,
            toToken,
            fromAmount,
            exchange,
            payload
        );
    }

    function _swapOnAavee(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        address exchange,
        bytes memory payload
    )
      private
    {
        AaveeDataV1 memory data = abi.decode(payload, (AaveeDataV1));

        Utils.approve(spender, address(fromToken), fromAmount);

        if (address(fromToken) == address(data.aToken)) {
            require(
                IAaveToken(data.aToken).underlyingAssetAddress() == address(toToken),
                "Invalid to token"
            );

            IAaveToken(data.aToken).redeem(fromAmount);
        }
        else if(address(toToken) == address(data.aToken)) {
            require(
                IAaveToken(data.aToken).underlyingAssetAddress() == address(fromToken),
                "Invalid to token"
            );
            if (address(fromToken) == Utils.ethAddress()) {
                IAaveV1LendingPool(exchange).deposit{value: fromAmount}(fromToken, fromAmount, refCodeV1);
            }
            else {
                IAaveV1LendingPool(exchange).deposit(fromToken, fromAmount, refCodeV1);
            }
        }
        else {
            revert("Invalid aToken");
        }
    }
}

// File: original_contracts/lib/chai/IChai.sol

pragma solidity 0.7.5;


interface IChai {

    function join(address dst, uint wad) external;

    function exit(address src, uint wad) external;
}

// File: original_contracts/lib/chai/ChaiExchange.sol

pragma solidity 0.7.5;





contract ChaiExchange {

    address public immutable chai;
    address public immutable dai ;

    constructor(address _chai, address _dai) public {
        chai = _chai;
        dai = _dai;
    }

    function swapOnChai(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount
    )
        internal

    {

        _swapOnChai(
            fromToken,
            toToken,
            fromAmount
        );
    }

    function buyOnChai(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount
    )
        internal

    {

        _swapOnChai(
            fromToken,
            toToken,
            fromAmount
        );
    }

    function _swapOnChai(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount
    )
        private
    {

        Utils.approve(address(chai), address(fromToken), fromAmount);

        if (address(fromToken) == chai){
            require(address(toToken) == dai, "Destination token should be dai");
            IChai(chai).exit(address(this), fromAmount);
        }
        else if (address(fromToken) == dai) {
            require(address(toToken) == chai, "Destination token should be chai");
            IChai(chai).join(address(this), fromAmount);
        }
        else {
            revert("Invalid fromToken");
        }
    }
}

// File: original_contracts/lib/bprotocol/IBProtocolAMM.sol

pragma solidity 0.7.5;

interface IBProtocolAMM {
    function swap(
        uint lusdAmount,
        uint minEthReturn,
        address payable dest
    ) external returns(uint);
}

// File: original_contracts/lib/bprotocol/BProtocolAMM.sol

pragma solidity 0.7.5;




contract BProtocol {

    function swapOnBProtocol(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        address exchange,
        bytes calldata payload
    )
    internal

    {

        Utils.approve(address(exchange), address(fromToken), fromAmount);

        IBProtocolAMM(exchange).swap(fromAmount, 1, payable(address(this)));
    }
}

// File: original_contracts/lib/bzx/IBZX.sol

pragma solidity 0.7.5;


interface IBZX {

    function mint(
        address receiver,
        uint256 depositAmount
    )
    external
    returns (uint256 mintAmount);

    function mintWithEther(address receiver) external payable returns (uint256 mintAmount);

    function burn(
        address receiver,
        uint256 burnAmount
    )
        external
        returns (uint256 loanAmountPaid);

    function burnToEther(
        address payable receiver,
        uint256 burnAmount
    )
        external
        returns (uint256 loanAmountPaid);

    function loanTokenAddress() external view returns(address );
}

// File: original_contracts/lib/WethProvider.sol

pragma solidity 0.7.5;


contract WethProvider {
    address public immutable WETH;

    constructor(address weth) public {
        WETH = weth;
    }
}

// File: original_contracts/lib/bzx/BZX.sol

pragma solidity 0.7.5;





abstract contract BZX is WethProvider {

    struct BZXData {
        address iToken;
    }

    function swapOnBzx(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        bytes calldata payload
    )
        internal

    {
        _swapOnBZX(
            fromToken,
            toToken,
            fromAmount,
            payload
        );
    }

    function buyOnBzx(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        bytes calldata payload
    )
        internal

    {
        _swapOnBZX(
            fromToken,
            toToken,
            fromAmount,
            payload
        );
    }

    function _swapOnBZX(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        bytes memory payload
    )
        private
    {
        BZXData memory data = abi.decode(payload, (BZXData));

        Utils.approve(address(data.iToken), address(fromToken), fromAmount);

        if (address(fromToken) == address(data.iToken)) {
            if (address(toToken) == Utils.ethAddress()) {
                require(
                    IBZX(data.iToken).loanTokenAddress() == WETH,
                    "Invalid to token"
                );
                IBZX(data.iToken).burnToEther(payable(address(this)), fromAmount);
            }
            else {
                require(
                    IBZX(data.iToken).loanTokenAddress() == address(toToken),
                    "Invalid to token"
                );
                IBZX(data.iToken).burn(address(this), fromAmount);
            }
        }
        else if (address(toToken) == address(data.iToken)){
            if (address(fromToken) == Utils.ethAddress()) {
                require(
                    IBZX(data.iToken).loanTokenAddress() == WETH,
                    "Invalid from token"
                );

                IBZX(data.iToken).mintWithEther{value: fromAmount}(address(this));
            }
            else {
                require(
                    IBZX(data.iToken).loanTokenAddress() == address(fromToken),
                    "Invalid from token"
                );
                IBZX(data.iToken).mint(address(this), fromAmount);
            }
        }
        else {
            revert("Invalid token pair!!");
        }
    }
}

// File: original_contracts/lib/smoothy/ISmoothyV1.sol

pragma solidity 0.7.5;

interface ISmoothyV1 {

  function swap(
    uint256 bTokenIdxIn,
    uint256 bTokenIdxOut,
    uint256 bTokenInAmount,
    uint256 bTokenOutMin
  )
  external;

}

// File: original_contracts/lib/weth/IWETH.sol

pragma solidity 0.7.5;



abstract contract IWETH is IERC20 {
    function deposit() external virtual payable;
    function withdraw(uint256 amount) external virtual;
}

// File: original_contracts/lib/smoothy/SmoothyV1.sol

pragma solidity 0.7.5;





contract SmoothyV1 {

  struct SmoothyV1Data {
    uint256 i;
    uint256 j;
  }

  function swapOnSmoothyV1(
    IERC20 fromToken,
    IERC20 toToken,
    uint256 fromAmount,
    address exchange,
    bytes calldata payload
  )
    internal
  {

    SmoothyV1Data memory data = abi.decode(payload, (SmoothyV1Data));

    Utils.approve(exchange, address(fromToken), fromAmount);

    ISmoothyV1(exchange).swap(data.i, data.j, fromAmount, 1);

  }
}

// File: original_contracts/lib/uniswap/IUniswapExchange.sol

pragma solidity 0.7.5;

interface IUniswapExchange {
    function ethToTokenSwapInput(
        uint256 minTokens,
        uint256 deadline) external payable returns (uint256 tokensBought);

     function ethToTokenSwapOutput(
        uint256 tokensBought,
        uint256 deadline) external payable returns (uint256 ethSold);

    function tokenToEthSwapInput(
        uint256 tokensSold,
        uint256 minEth,
        uint256 deadline) external returns (uint256 ethBought);

    function tokenToEthSwapOutput(
        uint256 ethBought,
        uint256 maxTokens,
        uint256 deadline) external returns (uint256 tokensSold);

    function tokenToTokenSwapInput(
        uint256 tokensSold,
        uint256 minTokensBought,
        uint256 minEthBought,
        uint256 deadline,
        address tokenAddr
    ) external returns (uint256 tokensBought);

    function tokenToTokenSwapOutput(
        uint256 tokensBought,
        uint256 maxTokensSold,
        uint256 maxEthSold,
        uint256 deadline,
        address toToken
    ) external returns (uint256 tokensSold);

    function ethToTokenTransferInput(
        uint256 min_tokens,
        uint256 deadline,
        address recipient
    ) external payable returns (uint256 tokens_bought);

    function ethToTokenTransferOutput(
        uint256 tokens_bought,
        uint256 deadline,
        address recipient
    ) external payable returns (uint256 eth_sold);

    function tokenToEthTransferInput(
        uint256 tokens_sold,
        uint256 min_tokens,
        uint256 deadline,
        address recipient
    ) external returns (uint256 eth_bought);

    function tokenToEthTransferOutput(
        uint256 eth_bought,
        uint256 max_tokens,
        uint256 deadline,
        address recipient
    ) external returns (uint256 tokens_sold);

    function tokenToTokenTransferInput(
        uint256 tokens_sold,
        uint256 min_tokens_bought,
        uint256 min_eth_bought,
        uint256 deadline,
        address recipient,
        address token_addr
    ) external returns (uint256 tokens_bought);

    function tokenToTokenTransferOutput(
        uint256 tokens_bought,
        uint256 max_tokens_sold,
        uint256 max_eth_sold,
        uint256 deadline,
        address recipient,
        address token_addr
    ) external returns (uint256 tokens_sold);
}

// File: original_contracts/lib/uniswap/IUniswapFactory.sol

pragma solidity 0.7.5;


interface IUniswapFactory {
    function getExchange(address token) external view returns (address exchange);
}

// File: original_contracts/lib/uniswap/UniswapV1.sol

pragma solidity 0.7.5;






contract UniswapV1 {
    using SafeMath for uint256;

    address public immutable factory;

    constructor(address _factory) public {
        factory = _factory;
    }

    function swapOnUniswapV1(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount
    )
        internal

    {

        _swapOnUniswapV1(
            fromToken,
            toToken,
            fromAmount,
            1
        );
    }

    function buyOnUniswapV1(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        uint256 toAmount
    )
        internal

    {

        address exchange = getExchange(fromToken, toToken);

        Utils.approve(address(exchange), address(fromToken), fromAmount);

        if (address(fromToken) == Utils.ethAddress()) {
            IUniswapExchange(exchange).ethToTokenSwapOutput{value: fromAmount}(toAmount, block.timestamp);
        }
        else if (address(toToken) == Utils.ethAddress()) {
            IUniswapExchange(exchange).tokenToEthSwapOutput(toAmount, fromAmount, block.timestamp);
        }
        else {
            IUniswapExchange(exchange).tokenToTokenSwapOutput(
              toAmount,
              fromAmount,
              Utils.maxUint(),
              block.timestamp,
              address(toToken)
            );
        }

    }

    function getExchange(
        IERC20 fromToken,
        IERC20 toToken
    )
      private
      view
      returns (address)
    {
        address exchangeAddress = address(fromToken) == Utils.ethAddress() ? address(toToken) : address(fromToken);

        return IUniswapFactory(factory).getExchange(exchangeAddress);
    }

    function _swapOnUniswapV1(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        uint256 toAmount
    )
      private
      returns(uint256)
    {
        address exchange = getExchange(fromToken, toToken);

        Utils.approve(
          exchange,
          address(fromToken),
          fromAmount
        );

        uint256 receivedAmount = 0;

        if (address(fromToken) == Utils.ethAddress()) {
            receivedAmount = IUniswapExchange(exchange).ethToTokenSwapInput{value: fromAmount}(toAmount, block.timestamp);
        }
        else if (address(toToken) == Utils.ethAddress()) {
            receivedAmount = IUniswapExchange(exchange).tokenToEthSwapInput(fromAmount, toAmount, block.timestamp);
        }
        else {
            receivedAmount = IUniswapExchange(exchange).tokenToTokenSwapInput(fromAmount, toAmount, 1, block.timestamp, address(toToken));
        }

        return receivedAmount;
    }

}

// File: original_contracts/adapters/mainnet/Adapter03.sol

pragma solidity 0.7.5;








/**
* @dev This contract will route call to:
* 0- ChaiExchange
* 1- UniswapV1
* 2- SmoothyV1
* 3- BZX
* 4- BProtocol
* 5- Aave
* The above are the indexes
*/

contract Adapter03 is IAdapter, ChaiExchange, UniswapV1, SmoothyV1, BZX, BProtocol, Aavee {
    using SafeMath for uint256;

    constructor(
        uint16 aaveeRefCode,
        address aaveeSpender,
        address uniswapFactory,
        address chai,
        address dai,
        address weth
    )
        WethProvider(weth)
        Aavee(aaveeRefCode, aaveeSpender)
        UniswapV1(uniswapFactory)
        ChaiExchange(chai, dai)
        public
    {
    }

    function initialize(bytes calldata data) override external {
        revert("METHOD NOT IMPLEMENTED");
    }

    function swap(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        uint256 networkFee,
        Utils.Route[] calldata route
    )
        external
        override
        payable
    {
        for (uint256 i = 0; i < route.length; i++) {
            if (route[i].index == 0) {
                //swap on ChaiExchange
                swapOnChai(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000)
                );
            }
            else if (route[i].index == 1) {
                //swap on Uniswap
                swapOnUniswapV1(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000)
                );
            }
            else if (route[i].index == 2) {
                //swap on Smoothy
                swapOnSmoothyV1(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000),
                    route[i].targetExchange,
                    route[i].payload
                );
            }
            else if (route[i].index == 3) {
                //swap on BZX
                swapOnBzx(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000),
                    route[i].payload
                );
            }
            else if (route[i].index == 4) {
                //swap on BProtocol
                swapOnBProtocol(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000),
                    route[i].targetExchange,
                    route[i].payload
                );
            }
            else if (route[i].index == 5) {
                //swap on aavee
                swapOnAavee(
                    fromToken,
                    toToken,
                    fromAmount.mul(route[i].percent).div(10000),
                    route[i].targetExchange,
                    route[i].payload
                );
            }
            else {
                revert("Index not supported");
            }
        }
    }
}