// SPDX-License-Identifier: MIT
// File: contracts\Interfaces.sol

pragma solidity 0.6.12;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUtil {
    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }
}

contract ReentrancyGuard {
    uint256 private _guardCounter;

    constructor () internal {
        _guardCounter = 1;
    }

    modifier nonReentrant() {
        _guardCounter += 1;
        uint256 localCounter = _guardCounter;
        _;
        require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
    }
}

interface ICurveGauge {
    function deposit(uint256) external;
    function balanceOf(address) external view returns (uint256);
    function withdraw(uint256) external;
    function claim_rewards() external;
    function reward_tokens(uint256) external view returns(address);//v2
    function rewarded_token() external view returns(address);//v1
}

interface ICurveVoteEscrow {
    function create_lock(uint256, uint256) external;
    function increase_amount(uint256) external;
    function increase_unlock_time(uint256) external;
    function withdraw() external;
    function smart_wallet_checker() external view returns (address);
}

interface IWalletChecker {
    function check(address) external view returns (bool);
}

interface IVoting{
    function vote(uint256, bool, bool) external; //voteId, support, executeIfDecided
    function getVote(uint256) external view returns(bool,bool,uint64,uint64,uint64,uint64,uint256,uint256,uint256,bytes memory); 
    function vote_for_gauge_weights(address,uint256) external;
}

interface IMinter{
    function mint(address) external;
}

interface IRegistry{
    function get_registry() external view returns(address);
    function get_address(uint256 _id) external view returns(address);
    function gauge_controller() external view returns(address);
    function get_lp_token(address) external view returns(address);
    function get_gauges(address) external view returns(address[10] memory,uint128[10] memory);
}

interface IStaker{
    function deposit(address, address) external;
    function withdraw(address) external;
    function withdraw(address, address, uint256) external;
    function withdrawAll(address, address) external;
    function createLock(uint256, uint256) external;
    function increaseAmount(uint256) external;
    function increaseTime(uint256) external;
    function release() external;
    function claimCrv(address) external returns (uint256);
    function claimRewards(address) external;
    function claimFees(address,address) external;
    function setStashAccess(address, bool) external;
    function vote(uint256,address,bool) external;
    function voteGaugeWeight(address,uint256) external;
    function balanceOfPool(address) external view returns (uint256);
    function operator() external view returns (address);
    function execute(address _to, uint256 _value, bytes calldata _data) external returns (bool, bytes memory);
}

interface IRewards{
    function stake(address, uint256) external;
    function stakeFor(address, uint256) external;
    function withdraw(address, uint256) external;
    function exit(address) external;
    function getReward(address) external;
    function queueNewRewards(uint256) external;
    function notifyRewardAmount(uint256) external;
    function addExtraReward(address) external;
    function stakingToken() external returns (address);
}

interface IStash{
    function stashRewards() external returns (bool);
    function processStash() external returns (bool);
    function claimRewards() external returns (bool);
}

interface IFeeDistro{
    function claim() external;
    function token() external view returns(address);
}

interface ITokenMinter{
    function mint(address,uint256) external;
    function burn(address,uint256) external;
}

interface IDeposit{
    function isShutdown() external view returns(bool);
    function balanceOf(address _account) external view returns(uint256);
    function totalSupply() external view returns(uint256);
    function poolInfo(uint256) external view returns(address,address,address,address,address, bool);
    function rewardClaimed(uint256,address,uint256) external;
    function withdrawTo(uint256,uint256,address) external;
    function claimRewards(uint256,address) external returns(bool);
    function rewardArbitrator() external returns(address);
}

interface ICrvDeposit{
    function deposit(uint256, bool) external;
    function lockIncentive() external view returns(uint256);
}

interface IRewardFactory{
    function setAccess(address,bool) external;
    function CreateCrvRewards(uint256,address) external returns(address);
    function CreateTokenRewards(address,address,address) external returns(address);
    function activeRewardCount(address) external view returns(uint256);
    function addActiveReward(address,uint256) external returns(bool);
    function removeActiveReward(address,uint256) external returns(bool);
}

interface IStashFactory{
    function CreateStash(uint256,address,address,uint256) external returns(address);
}

interface ITokenFactory{
    function CreateDepositToken(address) external returns(address);
}

interface IPools{
    function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool);
    function shutdownPool(uint256 _pid) external returns(bool);
    function poolInfo(uint256) external view returns(address,address,address,address,address,bool);
    function poolLength() external view returns (uint256);
    function gaugeMap(address) external view returns(bool);
    function setPoolManager(address _poolM) external;
}

interface IVestedEscrow{
    function fund(address[] calldata _recipient, uint256[] calldata _amount) external returns(bool);
}

// File: @openzeppelin\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, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @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");
        return a - b;
    }

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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\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\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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (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 {
            // 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\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: contracts\Booster.sol

pragma solidity 0.6.12;



contract Booster{
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

    address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
    address public constant registry = address(0x0000000022D53366457F9d5E68Ec105046FC4383);
    uint256 public constant distributionAddressId = 4;
    address public constant voteOwnership = address(0xE478de485ad2fe566d49342Cbd03E49ed7DB3356);
    address public constant voteParameter = address(0xBCfF8B0b9419b9A88c44546519b1e909cF330399);

    uint256 public lockIncentive = 1000; //incentive to crv stakers
    uint256 public stakerIncentive = 450; //incentive to native token stakers
    uint256 public earmarkIncentive = 50; //incentive to users who spend gas to make calls
    uint256 public platformFee = 0; //possible fee to build treasury
    uint256 public constant MaxFees = 2000;
    uint256 public constant FEE_DENOMINATOR = 10000;

    address public owner;
    address public feeManager;
    address public poolManager;
    address public immutable staker;
    address public immutable minter;
    address public rewardFactory;
    address public stashFactory;
    address public tokenFactory;
    address public rewardArbitrator;
    address public voteDelegate;
    address public treasury;
    address public stakerRewards; //cvx rewards
    address public lockRewards; //cvxCrv rewards(crv)
    address public lockFees; //cvxCrv vecrv fees
    address public feeDistro;
    address public feeToken;

    bool public isShutdown;

    struct PoolInfo {
        address lptoken;
        address token;
        address gauge;
        address crvRewards;
        address stash;
        bool shutdown;
    }

    //index(pid) -> pool
    PoolInfo[] public poolInfo;
    mapping(address => bool) public gaugeMap;

    event Deposited(address indexed user, uint256 indexed poolid, uint256 amount);
    event Withdrawn(address indexed user, uint256 indexed poolid, uint256 amount);

    constructor(address _staker, address _minter) public {
        isShutdown = false;
        staker = _staker;
        owner = msg.sender;
        voteDelegate = msg.sender;
        feeManager = msg.sender;
        poolManager = msg.sender;
        feeDistro = address(0); //address(0xA464e6DCda8AC41e03616F95f4BC98a13b8922Dc);
        feeToken = address(0); //address(0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490);
        treasury = address(0);
        minter = _minter;
    }


    /// SETTER SECTION ///

    function setOwner(address _owner) external {
        require(msg.sender == owner, "!auth");
        owner = _owner;
    }

    function setFeeManager(address _feeM) external {
        require(msg.sender == feeManager, "!auth");
        feeManager = _feeM;
    }

    function setPoolManager(address _poolM) external {
        require(msg.sender == poolManager, "!auth");
        poolManager = _poolM;
    }

    function setFactories(address _rfactory, address _sfactory, address _tfactory) external {
        require(msg.sender == owner, "!auth");
        
        //reward factory only allow this to be called once even if owner
        //removes ability to inject malicious staking contracts
        //token factory can also be immutable
        if(rewardFactory == address(0)){
            rewardFactory = _rfactory;
            tokenFactory = _tfactory;
        }

        //stash factory should be considered more safe to change
        //updating may be required to handle new types of gauges
        stashFactory = _sfactory;
    }

    function setArbitrator(address _arb) external {
        require(msg.sender==owner, "!auth");
        rewardArbitrator = _arb;
    }

    function setVoteDelegate(address _voteDelegate) external {
        require(msg.sender==voteDelegate, "!auth");
        voteDelegate = _voteDelegate;
    }

    function setRewardContracts(address _rewards, address _stakerRewards) external {
        require(msg.sender == owner, "!auth");
        
        //reward contracts are immutable or else the owner
        //has a means to redeploy and mint cvx via rewardClaimed()
        if(lockRewards == address(0)){
            lockRewards = _rewards;
            stakerRewards = _stakerRewards;
        }
    }

    // Set reward token and claim contract, get from Curve's registry
    function setFeeInfo() external {
        require(msg.sender==feeManager, "!auth");
        
        feeDistro = IRegistry(registry).get_address(distributionAddressId);
        address _feeToken = IFeeDistro(feeDistro).token();
        if(feeToken != _feeToken){
            //create a new reward contract for the new token
            lockFees = IRewardFactory(rewardFactory).CreateTokenRewards(_feeToken,lockRewards,address(this));
            feeToken = _feeToken;
        }
    }

    function setFees(uint256 _lockFees, uint256 _stakerFees, uint256 _callerFees, uint256 _platform) external{
        require(msg.sender==feeManager, "!auth");

        uint256 total = _lockFees.add(_stakerFees).add(_callerFees).add(_platform);
        require(total <= MaxFees, ">MaxFees");

        //values must be within certain ranges     
        if(_lockFees >= 1000 && _lockFees <= 1500
            && _stakerFees >= 300 && _stakerFees <= 600
            && _callerFees >= 10 && _callerFees <= 100
            && _platform <= 200){
            lockIncentive = _lockFees;
            stakerIncentive = _stakerFees;
            earmarkIncentive = _callerFees;
            platformFee = _platform;
        }
    }

    function setTreasury(address _treasury) external {
        require(msg.sender==feeManager, "!auth");
        treasury = _treasury;
    }

    /// END SETTER SECTION ///


    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    //create a new pool
    function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool){
        require(msg.sender==poolManager && !isShutdown, "!add");
        require(_gauge != address(0) && _lptoken != address(0),"!param");

        //the next pool's pid
        uint256 pid = poolInfo.length;

        //create a tokenized deposit
        address token = ITokenFactory(tokenFactory).CreateDepositToken(_lptoken);
        //create a reward contract for crv rewards
        address newRewardPool = IRewardFactory(rewardFactory).CreateCrvRewards(pid,token);
        //create a stash to handle extra incentives
        address stash = IStashFactory(stashFactory).CreateStash(pid,_gauge,staker,_stashVersion);

        //add the new pool
        poolInfo.push(
            PoolInfo({
                lptoken: _lptoken,
                token: token,
                gauge: _gauge,
                crvRewards: newRewardPool,
                stash: stash,
                shutdown: false
            })
        );
        gaugeMap[_gauge] = true;
        //give stashes access to rewardfactory and voteproxy
        //   voteproxy so it can grab the incentive tokens off the contract after claiming rewards
        //   reward factory so that stashes can make new extra reward contracts if a new incentive is added to the gauge
        if(stash != address(0)){
            poolInfo[pid].stash = stash;
            IStaker(staker).setStashAccess(stash,true);
            IRewardFactory(rewardFactory).setAccess(stash,true);
        }
        return true;
    }

    //shutdown pool
    function shutdownPool(uint256 _pid) external returns(bool){
        require(msg.sender==poolManager, "!auth");
        PoolInfo storage pool = poolInfo[_pid];

        //withdraw from gauge
        try IStaker(staker).withdrawAll(pool.lptoken,pool.gauge){
        }catch{}

        pool.shutdown = true;
        gaugeMap[pool.gauge] = false;
        return true;
    }

    //shutdown this contract.
    //  unstake and pull all lp tokens to this address
    //  only allow withdrawals
    function shutdownSystem() external{
        require(msg.sender == owner, "!auth");
        isShutdown = true;

        for(uint i=0; i < poolInfo.length; i++){
            PoolInfo storage pool = poolInfo[i];
            if (pool.shutdown) continue;

            address token = pool.lptoken;
            address gauge = pool.gauge;

            //withdraw from gauge
            try IStaker(staker).withdrawAll(token,gauge){
                pool.shutdown = true;
            }catch{}
        }
    }


    //deposit lp tokens and stake
    function deposit(uint256 _pid, uint256 _amount, bool _stake) public returns(bool){
        require(!isShutdown,"shutdown");
        PoolInfo storage pool = poolInfo[_pid];
        require(pool.shutdown == false, "pool is closed");

        //send to proxy to stake
        address lptoken = pool.lptoken;
        IERC20(lptoken).safeTransferFrom(msg.sender, staker, _amount);

        //stake
        address gauge = pool.gauge;
        require(gauge != address(0),"!gauge setting");
        IStaker(staker).deposit(lptoken,gauge);

        //some gauges claim rewards when depositing, stash them in a seperate contract until next claim
        address stash = pool.stash;
        if(stash != address(0)){
            IStash(stash).stashRewards();
        }

        address token = pool.token;
        if(_stake){
            //mint here and send to rewards on user behalf
            ITokenMinter(token).mint(address(this),_amount);
            address rewardContract = pool.crvRewards;
            IERC20(token).safeApprove(rewardContract,0);
            IERC20(token).safeApprove(rewardContract,_amount);
            IRewards(rewardContract).stakeFor(msg.sender,_amount);
        }else{
            //add user balance directly
            ITokenMinter(token).mint(msg.sender,_amount);
        }

        
        emit Deposited(msg.sender, _pid, _amount);
        return true;
    }

    //deposit all lp tokens and stake
    function depositAll(uint256 _pid, bool _stake) external returns(bool){
        address lptoken = poolInfo[_pid].lptoken;
        uint256 balance = IERC20(lptoken).balanceOf(msg.sender);
        deposit(_pid,balance,_stake);
        return true;
    }

    //withdraw lp tokens
    function _withdraw(uint256 _pid, uint256 _amount, address _from, address _to) internal {
        PoolInfo storage pool = poolInfo[_pid];
        address lptoken = pool.lptoken;
        address gauge = pool.gauge;

        //remove lp balance
        address token = pool.token;
        ITokenMinter(token).burn(_from,_amount);

        //pull from gauge if not shutdown
        // if shutdown tokens will be in this contract
        if (!pool.shutdown) {
            IStaker(staker).withdraw(lptoken,gauge, _amount);
        }

        //some gauges claim rewards when withdrawing, stash them in a seperate contract until next claim
        //do not call if shutdown since stashes wont have access
        address stash = pool.stash;
        if(stash != address(0) && !isShutdown && !pool.shutdown){
            IStash(stash).stashRewards();
        }
        
        //return lp tokens
        IERC20(lptoken).safeTransfer(_to, _amount);

        emit Withdrawn(_to, _pid, _amount);
    }

    //withdraw lp tokens
    function withdraw(uint256 _pid, uint256 _amount) public returns(bool){
        _withdraw(_pid,_amount,msg.sender,msg.sender);
        return true;
    }

    //withdraw all lp tokens
    function withdrawAll(uint256 _pid) public returns(bool){
        address token = poolInfo[_pid].token;
        uint256 userBal = IERC20(token).balanceOf(msg.sender);
        withdraw(_pid, userBal);
        return true;
    }

    //allow reward contracts to send here and withdraw to user
    function withdrawTo(uint256 _pid, uint256 _amount, address _to) external returns(bool){
        address rewardContract = poolInfo[_pid].crvRewards;
        require(msg.sender == rewardContract,"!auth");

        _withdraw(_pid,_amount,msg.sender,_to);
        return true;
    }


    //delegate address votes on dao
    function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool){
        require(msg.sender == voteDelegate, "!auth");
        require(_votingAddress == voteOwnership || _votingAddress == voteParameter, "!voteAddr");
        
        IStaker(staker).vote(_voteId,_votingAddress,_support);
        return true;
    }

    function voteGaugeWeight(address[] calldata _gauge, uint256[] calldata _weight ) external returns(bool){
        require(msg.sender == voteDelegate, "!auth");

        for(uint256 i = 0; i < _gauge.length; i++){
            IStaker(staker).voteGaugeWeight(_gauge[i],_weight[i]);
        }
        return true;
    }

    function claimRewards(uint256 _pid, address _gauge) external returns(bool){
        address stash = poolInfo[_pid].stash;
        require(msg.sender == stash,"!auth");

        IStaker(staker).claimRewards(_gauge);
        return true;
    }

    function setGaugeRedirect(uint256 _pid) external returns(bool){
        address stash = poolInfo[_pid].stash;
        require(msg.sender == stash,"!auth");
        address gauge = poolInfo[_pid].gauge;
        bytes memory data = abi.encodeWithSelector(bytes4(keccak256("set_rewards_receiver(address)")), stash);
        IStaker(staker).execute(gauge,uint256(0),data);
        return true;
    }

    //claim crv and extra rewards and disperse to reward contracts
    function _earmarkRewards(uint256 _pid) internal {
        PoolInfo storage pool = poolInfo[_pid];
        require(pool.shutdown == false, "pool is closed");

        address gauge = pool.gauge;

        //claim crv
        IStaker(staker).claimCrv(gauge);

        //check if there are extra rewards
        address stash = pool.stash;
        if(stash != address(0)){
            //claim extra rewards
            IStash(stash).claimRewards();
            //process extra rewards
            IStash(stash).processStash();
        }

        //crv balance
        uint256 crvBal = IERC20(crv).balanceOf(address(this));

        if (crvBal > 0) {
            uint256 _lockIncentive = crvBal.mul(lockIncentive).div(FEE_DENOMINATOR);
            uint256 _stakerIncentive = crvBal.mul(stakerIncentive).div(FEE_DENOMINATOR);
            uint256 _callIncentive = crvBal.mul(earmarkIncentive).div(FEE_DENOMINATOR);
            
            //send treasury
            if(treasury != address(0) && treasury != address(this) && platformFee > 0){
                //only subtract after address condition check
                uint256 _platform = crvBal.mul(platformFee).div(FEE_DENOMINATOR);
                crvBal = crvBal.sub(_platform);
                IERC20(crv).safeTransfer(treasury, _platform);
            }

            //remove incentives from balance
            crvBal = crvBal.sub(_lockIncentive).sub(_callIncentive).sub(_stakerIncentive);

            //send incentives for calling
            IERC20(crv).safeTransfer(msg.sender, _callIncentive);          

            //send crv to lp provider reward contract
            address rewardContract = pool.crvRewards;
            IERC20(crv).safeTransfer(rewardContract, crvBal);
            IRewards(rewardContract).queueNewRewards(crvBal);

            //send lockers' share of crv to reward contract
            IERC20(crv).safeTransfer(lockRewards, _lockIncentive);
            IRewards(lockRewards).queueNewRewards(_lockIncentive);

            //send stakers's share of crv to reward contract
            IERC20(crv).safeTransfer(stakerRewards, _stakerIncentive);
            IRewards(stakerRewards).queueNewRewards(_stakerIncentive);
        }
    }

    function earmarkRewards(uint256 _pid) external returns(bool){
        require(!isShutdown,"shutdown");
        _earmarkRewards(_pid);
        return true;
    }

    //claim fees from curve distro contract, put in lockers' reward contract
    function earmarkFees() external returns(bool){
        //claim fee rewards
        IStaker(staker).claimFees(feeDistro, feeToken);
        //send fee rewards to reward contract
        uint256 _balance = IERC20(feeToken).balanceOf(address(this));
        IERC20(feeToken).safeTransfer(lockFees, _balance);
        IRewards(lockFees).queueNewRewards(_balance);
        return true;
    }

    //callback from reward contract when crv is received.
    function rewardClaimed(uint256 _pid, address _address, uint256 _amount) external returns(bool){
        address rewardContract = poolInfo[_pid].crvRewards;
        require(msg.sender == rewardContract || msg.sender == lockRewards, "!auth");

        //mint reward tokens
        ITokenMinter(minter).mint(_address,_amount);
        
        return true;
    }

}