{{
  "language": "Solidity",
  "sources": {
    "/contracts/GaugeExtraRewardDistributor.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity 0.8.10;\r\n\r\nimport \"./interfaces/IFraxFarmERC20.sol\";\r\nimport \"./interfaces/IConvexWrapper.sol\";\r\nimport '@openzeppelin/contracts/token/ERC20/IERC20.sol';\r\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\r\n\r\n\r\n    \r\ncontract GaugeExtraRewardDistributor {\r\n    using SafeERC20 for IERC20;\r\n\r\n    address public farm;\r\n    address public wrapper;\r\n\r\n    address public constant cvx = address(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);\r\n    address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);\r\n\r\n    event Recovered(address _token, uint256 _amount);\r\n    event Distributed(address _token, uint256 _rate);\r\n\r\n    constructor(){}\r\n\r\n    function initialize(address _farm, address _wrapper) external {\r\n        require(farm == address(0),\"init fail\");\r\n\r\n        farm = _farm;\r\n        wrapper = _wrapper;\r\n    }\r\n\r\n    //owner is farm owner\r\n    modifier onlyOwner() {\r\n        require(msg.sender == IFraxFarmERC20(farm).owner(), \"!owner\");\r\n        _;\r\n    }\r\n\r\n    function recoverERC20(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {\r\n        require(_tokenAddress != crv && _tokenAddress != cvx, \"invalid\");\r\n        IERC20(_tokenAddress).safeTransfer(IFraxFarmERC20(farm).owner(), _tokenAmount);\r\n        emit Recovered(_tokenAddress, _tokenAmount);\r\n    }\r\n\r\n    // Add a new reward token to be distributed to stakers\r\n    function distributeReward(address _farm) external returns(uint256 weeks_elapsed, uint256 reward_tally){\r\n        //only allow farm to call\r\n        require(msg.sender == farm);\r\n        \r\n        //get rewards\r\n        IConvexWrapper(wrapper).getReward(_farm);\r\n\r\n        //get last period update from farm and figure out period\r\n        uint256 duration = IFraxFarmERC20(_farm).rewardsDuration();\r\n        uint256 periodLength = ((block.timestamp + duration) / duration * duration) - IFraxFarmERC20(_farm).periodFinish();\r\n        weeks_elapsed = (periodLength/duration);\r\n\r\n        //reward tokens on farms are constant so dont need to loop, just distribute crv and cvx\r\n        reward_tally = IERC20(crv).balanceOf(address(this));\r\n        uint256 rewardRate = reward_tally / periodLength;\r\n        if(reward_tally > 0){\r\n            IERC20(crv).transfer(farm, reward_tally);\r\n        }\r\n        //if reward_tally is 0, still need to call so reward rate is set to 0\r\n        IFraxFarmERC20(_farm).setRewardVars(crv, rewardRate, address(0), address(this));\r\n        emit Distributed(crv, rewardRate);\r\n\r\n        reward_tally = IERC20(cvx).balanceOf(address(this));\r\n        rewardRate = reward_tally / periodLength;\r\n        if(reward_tally > 0){\r\n            IERC20(cvx).transfer(farm, reward_tally);\r\n        }\r\n        IFraxFarmERC20(_farm).setRewardVars(cvx, rewardRate, address(0), address(0)); //keep distributor 0 since its shared\r\n        emit Distributed(cvx, rewardRate);\r\n    }\r\n}"
    },
    "/contracts/interfaces/IFraxFarmERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity >=0.8.0;\r\n\r\ninterface IFraxFarmERC20 {\r\n    \r\n    struct LockedStake {\r\n        bytes32 kek_id;\r\n        uint256 start_timestamp;\r\n        uint256 liquidity;\r\n        uint256 ending_timestamp;\r\n        uint256 lock_multiplier; // 6 decimals of precision. 1x = 1000000\r\n    }\r\n\r\n    function owner() external view returns (address);\r\n    function stakingToken() external view returns (address);\r\n    function fraxPerLPToken() external view returns (uint256);\r\n    function calcCurCombinedWeight(address account) external view\r\n        returns (\r\n            uint256 old_combined_weight,\r\n            uint256 new_vefxs_multiplier,\r\n            uint256 new_combined_weight\r\n        );\r\n    function lockedStakesOf(address account) external view returns (LockedStake[] memory);\r\n    function lockedStakesOfLength(address account) external view returns (uint256);\r\n    function lockAdditional(bytes32 kek_id, uint256 addl_liq) external;\r\n    function lockLonger(bytes32 kek_id, uint256 new_ending_ts) external;\r\n    function stakeLocked(uint256 liquidity, uint256 secs) external returns (bytes32);\r\n    function withdrawLocked(bytes32 kek_id, address destination_address) external returns (uint256);\r\n\r\n\r\n\r\n    function periodFinish() external view returns (uint256);\r\n    function rewardsDuration() external view returns (uint256);\r\n    function getAllRewardTokens() external view returns (address[] memory);\r\n    function earned(address account) external view returns (uint256[] memory new_earned);\r\n    function totalLiquidityLocked() external view returns (uint256);\r\n    function lockedLiquidityOf(address account) external view returns (uint256);\r\n    function totalCombinedWeight() external view returns (uint256);\r\n    function combinedWeightOf(address account) external view returns (uint256);\r\n    function lockMultiplier(uint256 secs) external view returns (uint256);\r\n    function rewardRates(uint256 token_idx) external view returns (uint256 rwd_rate);\r\n\r\n    function userStakedFrax(address account) external view returns (uint256);\r\n    function proxyStakedFrax(address proxy_address) external view returns (uint256);\r\n    function maxLPForMaxBoost(address account) external view returns (uint256);\r\n    function minVeFXSForMaxBoost(address account) external view returns (uint256);\r\n    function minVeFXSForMaxBoostProxy(address proxy_address) external view returns (uint256);\r\n    function veFXSMultiplier(address account) external view returns (uint256 vefxs_multiplier);\r\n\r\n    function toggleValidVeFXSProxy(address proxy_address) external;\r\n    function proxyToggleStaker(address staker_address) external;\r\n    function stakerSetVeFXSProxy(address proxy_address) external;\r\n    function getReward(address destination_address) external returns (uint256[] memory);\r\n    function vefxs_max_multiplier() external view returns(uint256);\r\n    function vefxs_boost_scale_factor() external view returns(uint256);\r\n    function vefxs_per_frax_for_max_boost() external view returns(uint256);\r\n    function getProxyFor(address addr) external view returns (address);\r\n\r\n    function sync() external;\r\n    function setRewardVars(address reward_token_address, uint256 _new_rate, address _gauge_controller_address, address _rewards_distributor_address) external;\r\n    function changeTokenManager(address reward_token_address, address new_manager_address) external;\r\n}\r\n"
    },
    "/contracts/interfaces/IConvexWrapper.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity 0.8.10;\r\n\r\ninterface IConvexWrapper{\r\n\r\n   struct EarnedData {\r\n        address token;\r\n        uint256 amount;\r\n    }\r\n\r\n  function collateralVault() external view returns(address vault);\r\n  function convexPoolId() external view returns(uint256 _poolId);\r\n  function curveToken() external view returns(address);\r\n  function convexToken() external view returns(address);\r\n  function balanceOf(address _account) external view returns(uint256);\r\n  function totalBalanceOf(address _account) external view returns(uint256);\r\n  function deposit(uint256 _amount, address _to) external;\r\n  function stake(uint256 _amount, address _to) external;\r\n  function withdraw(uint256 _amount) external;\r\n  function withdrawAndUnwrap(uint256 _amount) external;\r\n  function getReward(address _account) external;\r\n  function getReward(address _account, address _forwardTo) external;\r\n  function rewardLength() external view returns(uint256);\r\n  function earned(address _account) external view returns(EarnedData[] memory claimable);\r\n  function setVault(address _vault) external;\r\n  function user_checkpoint(address[2] calldata _accounts) external returns(bool);\r\n}"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        assembly {\n            size := extcodesize(account)\n        }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function safeIncreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    function safeDecreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n        }\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        if (returndata.length > 0) {\n            // Return data is optional\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"
    }
  },
  "settings": {
    "remappings": [],
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "london",
    "libraries": {},
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}