creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "/contracts/StakingProxyConvex.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"./interfaces/ICurveConvex.sol\";\nimport \"./interfaces/IConvexWrapperV2.sol\";\nimport \"./StakingProxyBase.sol\";\nimport \"./interfaces/IFraxFarmERC20_V2.sol\";\nimport '@openzeppelin/contracts/security/ReentrancyGuard.sol';\n\n\n\ncontract StakingProxyConvex is StakingProxyBase, ReentrancyGuard{\n    using SafeERC20 for IERC20;\n\n    address public constant convexCurveBooster = address(0xF403C135812408BFbE8713b5A23a04b3D48AAE31);\n    address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);\n    address public constant cvx = address(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);\n\n    address public curveLpToken;\n    address public convexDepositToken;\n\n    constructor() {\n    }\n\n    function vaultType() external pure override returns(VaultType){\n        return VaultType.Convex;\n    }\n\n    function vaultVersion() external pure override returns(uint256){\n        return 7;\n    }\n\n    //initialize vault\n    function initialize(address _owner, address _stakingAddress, address _stakingToken, address _rewardsAddress) public override{\n        require(owner == address(0),\"already init\");\n\n        //set variables\n        super.initialize(_owner, _stakingAddress, _stakingToken, _rewardsAddress);\n\n        //get tokens from pool info\n        (address _lptoken, address _token,,, , ) = ICurveConvex(convexCurveBooster).poolInfo(IConvexWrapperV2(_stakingToken).convexPoolId());\n    \n        curveLpToken = _lptoken;\n        convexDepositToken = _token;\n\n        //set infinite approvals\n        IERC20(_stakingToken).approve(_stakingAddress, type(uint256).max);\n        IERC20(_lptoken).approve(_stakingToken, type(uint256).max);\n        IERC20(_token).approve(_stakingToken, type(uint256).max);\n    }\n\n\n    //create a new locked state of _secs timelength with a Curve LP token\n    function stakeLockedCurveLp(uint256 _liquidity, uint256 _secs) external onlyOwner nonReentrant returns (bytes32 kek_id){\n        if(_liquidity > 0){\n            //pull tokens from user\n            IERC20(curveLpToken).safeTransferFrom(msg.sender, address(this), _liquidity);\n\n            //deposit into wrapper\n            IConvexWrapperV2(stakingToken).deposit(_liquidity, address(this));\n\n            //stake\n            kek_id = IFraxFarmERC20_V2(stakingAddress).stakeLocked(_liquidity, _secs);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //create a new locked state of _secs timelength with a Convex deposit token\n    function stakeLockedConvexToken(uint256 _liquidity, uint256 _secs) external onlyOwner nonReentrant returns (bytes32 kek_id){\n        if(_liquidity > 0){\n            //pull tokens from user\n            IERC20(convexDepositToken).safeTransferFrom(msg.sender, address(this), _liquidity);\n\n            //stake into wrapper\n            IConvexWrapperV2(stakingToken).stake(_liquidity, address(this));\n\n            //stake into frax\n            kek_id = IFraxFarmERC20_V2(stakingAddress).stakeLocked(_liquidity, _secs);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //create a new locked state of _secs timelength\n    function stakeLocked(uint256 _liquidity, uint256 _secs) external onlyOwner nonReentrant returns (bytes32 kek_id){\n        if(_liquidity > 0){\n            //pull tokens from user\n            IERC20(stakingToken).safeTransferFrom(msg.sender, address(this), _liquidity);\n\n            //stake\n            kek_id = IFraxFarmERC20_V2(stakingAddress).stakeLocked(_liquidity, _secs);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //add to a current lock\n    function lockAdditional(bytes32 _kek_id, uint256 _addl_liq) external onlyOwner nonReentrant{\n        if(_addl_liq > 0){\n            //pull tokens from user\n            IERC20(stakingToken).safeTransferFrom(msg.sender, address(this), _addl_liq);\n\n            //add stake\n            IFraxFarmERC20_V2(stakingAddress).lockAdditional(_kek_id, _addl_liq);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //add to a current lock\n    function lockAdditionalCurveLp(bytes32 _kek_id, uint256 _addl_liq) external onlyOwner nonReentrant{\n        if(_addl_liq > 0){\n            //pull tokens from user\n            IERC20(curveLpToken).safeTransferFrom(msg.sender, address(this), _addl_liq);\n\n            //deposit into wrapper\n            IConvexWrapperV2(stakingToken).deposit(_addl_liq, address(this));\n\n            //add stake\n            IFraxFarmERC20_V2(stakingAddress).lockAdditional(_kek_id, _addl_liq);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //add to a current lock\n    function lockAdditionalConvexToken(bytes32 _kek_id, uint256 _addl_liq) external onlyOwner nonReentrant{\n        if(_addl_liq > 0){\n            //pull tokens from user\n            IERC20(convexDepositToken).safeTransferFrom(msg.sender, address(this), _addl_liq);\n\n            //stake into wrapper\n            IConvexWrapperV2(stakingToken).stake(_addl_liq, address(this));\n\n            //add stake\n            IFraxFarmERC20_V2(stakingAddress).lockAdditional(_kek_id, _addl_liq);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    // Extends the lock of an existing stake\n    function lockLonger(bytes32 _kek_id, uint256 new_ending_ts) external onlyOwner nonReentrant{\n        //update time\n        IFraxFarmERC20_V2(stakingAddress).lockLonger(_kek_id, new_ending_ts);\n\n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //withdraw a staked position\n    //frax farm transfers first before updating farm state so will checkpoint during transfer\n    function withdrawLocked(bytes32 _kek_id) external onlyOwner nonReentrant{        \n        //withdraw directly to owner(msg.sender)\n        IFraxFarmERC20_V2(stakingAddress).withdrawLocked(_kek_id, msg.sender, false);\n\n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //withdraw a staked position\n    //frax farm transfers first before updating farm state so will checkpoint during transfer\n    function withdrawLockedAndUnwrap(bytes32 _kek_id) external onlyOwner nonReentrant{\n        //withdraw\n        IFraxFarmERC20_V2(stakingAddress).withdrawLocked(_kek_id, address(this), false);\n\n        //unwrap\n        IConvexWrapperV2(stakingToken).withdrawAndUnwrap(IERC20(stakingToken).balanceOf(address(this)));\n        IERC20(curveLpToken).transfer(owner,IERC20(curveLpToken).balanceOf(address(this)));\n\n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //helper function to combine earned tokens on staking contract and any tokens that are on this vault\n    function earned() external override returns (address[] memory token_addresses, uint256[] memory total_earned) {\n        //get list of reward tokens\n        address[] memory rewardTokens = IFraxFarmERC20_V2(stakingAddress).getAllRewardTokens();\n        uint256[] memory stakedearned = IFraxFarmERC20_V2(stakingAddress).earned(address(this));\n        IConvexWrapperV2.EarnedData[] memory convexrewards = IConvexWrapperV2(stakingToken).earned(address(this));\n        uint256 convexExtraRewards = convexrewards.length - 2; //ignore crv and cvx which are guaranteed to be slots 0 and 1\n\n        uint256 extraRewardsLength = IRewards(rewards).rewardTokenLength();\n        token_addresses = new address[](rewardTokens.length + extraRewardsLength + convexExtraRewards);\n        total_earned = new uint256[](rewardTokens.length + extraRewardsLength + convexExtraRewards);\n\n        //add any tokens that happen to be already claimed but sitting on the vault\n        //(ex. withdraw claiming rewards)\n        for(uint256 i = 0; i < rewardTokens.length; i++){\n            token_addresses[i] = rewardTokens[i];\n            total_earned[i] = stakedearned[i] + IERC20(rewardTokens[i]).balanceOf(address(this));\n        }\n\n        IRewards.EarnedData[] memory extraRewards = IRewards(rewards).claimableRewards(address(this));\n        for(uint256 i = 0; i < extraRewards.length; i++){\n            token_addresses[i+rewardTokens.length] = extraRewards[i].token;\n            total_earned[i+rewardTokens.length] = extraRewards[i].amount;\n        }\n\n        //add convex farm earned tokens (new farms get crv/cvx distributed through the farm so start from index 2)\n        for(uint256 i = 0; i < convexExtraRewards; i++){\n            token_addresses[i+rewardTokens.length+extraRewardsLength] = convexrewards[i+2].token; //offset to skip crv/cvx\n            total_earned[i+rewardTokens.length+extraRewardsLength] = convexrewards[i+2].amount; //offset to skip crv/cvx\n        }\n    }\n\n    /*\n    claim flow:\n        claim rewards directly to the vault\n        calculate fees to send to fee deposit\n        send fxs to a holder contract for fees\n        get reward list of tokens that were received\n        send all remaining tokens to owner\n\n    A slightly less gas intensive approach could be to send rewards directly to a holder contract and have it sort everything out.\n    However that makes the logic a bit more complex as well as runs a few future proofing risks\n    */\n    function getReward() external override{\n        getReward(true);\n    }\n\n    //get reward with claim option.\n    //_claim bool is for the off chance that rewardCollectionPause is true so getReward() fails but\n    //there are tokens on this vault for cases such as withdraw() also calling claim.\n    //can also be used to rescue tokens on the vault\n    function getReward(bool _claim) public override{\n\n        //claim\n        if(_claim){\n            //claim frax farm\n            IFraxFarmERC20_V2(stakingAddress).getReward(address(this));\n            //claim convex farm and forward to owner\n            IConvexWrapperV2(stakingToken).getReward(address(this),owner);\n\n            //double check there have been no crv/cvx claims directly to this address\n            uint256 b = IERC20(crv).balanceOf(address(this));\n            if(b > 0){\n                IERC20(crv).safeTransfer(owner, b);\n            }\n            b = IERC20(cvx).balanceOf(address(this));\n            if(b > 0){\n                IERC20(cvx).safeTransfer(owner, b);\n            }\n        }\n\n        //process fxs fees\n        _processFxs();\n\n        //get list of reward tokens\n        address[] memory rewardTokens = IFraxFarmERC20_V2(stakingAddress).getAllRewardTokens();\n\n        //transfer\n        _transferTokens(rewardTokens);\n\n        //extra rewards\n        _processExtraRewards();\n    }\n\n    //auxiliary function to supply token list(save a bit of gas + dont have to claim everything)\n    //_claim bool is for the off chance that rewardCollectionPause is true so getReward() fails but\n    //there are tokens on this vault for cases such as withdraw() also calling claim.\n    //can also be used to rescue tokens on the vault\n    function getReward(bool _claim, address[] calldata _rewardTokenList) external override{\n\n        //claim\n        if(_claim){\n            //claim frax farm\n            IFraxFarmERC20_V2(stakingAddress).getReward(address(this));\n            //claim convex farm and forward to owner\n            IConvexWrapperV2(stakingToken).getReward(address(this),owner);\n        }\n\n        //process fxs fees\n        _processFxs();\n\n        //transfer\n        _transferTokens(_rewardTokenList);\n\n        //extra rewards\n        _processExtraRewards();\n    }\n\n}\n"
      },
      "/contracts/interfaces/IRewards.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IRewards{\n    struct EarnedData {\n        address token;\n        uint256 amount;\n    }\n    \n    function initialize(uint256 _pid, bool _startActive) external;\n    function addReward(address _rewardsToken, address _distributor) external;\n    function approveRewardDistributor(\n        address _rewardsToken,\n        address _distributor,\n        bool _approved\n    ) external;\n    function deposit(address _owner, uint256 _amount) external;\n    function withdraw(address _owner, uint256 _amount) external;\n    function getReward(address _forward) external;\n    function notifyRewardAmount(address _rewardsToken, uint256 _reward) external;\n    function balanceOf(address account) external view returns (uint256);\n    function claimableRewards(address _account) external view returns(EarnedData[] memory userRewards);\n    function rewardTokens(uint256 _rid) external view returns (address);\n    function rewardTokenLength() external view returns(uint256);\n    function poolId() external view returns(uint256);\n    function active() external view returns(bool);\n}"
      },
      "/contracts/interfaces/IProxyVault.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IProxyVault {\n\n    enum VaultType{\n        Erc20Basic,\n        UniV3,\n        Convex,\n        Erc20Joint\n    }\n\n    function initialize(address _owner, address _stakingAddress, address _stakingToken, address _rewardsAddress) external;\n    function usingProxy() external returns(address);\n    function owner() external returns(address);\n    function stakingAddress() external returns(address);\n    function rewards() external returns(address);\n    function getReward() external;\n    function getReward(bool _claim) external;\n    function getReward(bool _claim, address[] calldata _rewardTokenList) external;\n    function earned() external returns (address[] memory token_addresses, uint256[] memory total_earned);\n}"
      },
      "/contracts/interfaces/IPoolRegistry.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IPoolRegistry {\n    function poolLength() external view returns(uint256);\n    function poolInfo(uint256 _pid) external view returns(address, address, address, address, uint8);\n    function vaultMap(uint256 _pid, address _user) external view returns(address vault);\n    function addUserVault(uint256 _pid, address _user) external returns(address vault, address stakeAddress, address stakeToken, address rewards);\n    function deactivatePool(uint256 _pid) external;\n    function addPool(address _implementation, address _stakingAddress, address _stakingToken) external;\n    function setRewardActiveOnCreation(bool _active) external;\n    function setRewardImplementation(address _imp) external;\n}"
      },
      "/contracts/interfaces/IFraxFarmERC20_V2.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\ninterface IFraxFarmERC20_V2 {\n    \n    struct LockedStake {\n        bytes32 kek_id;\n        uint256 start_timestamp;\n        uint256 liquidity;\n        uint256 ending_timestamp;\n        uint256 lock_multiplier; // 6 decimals of precision. 1x = 1000000\n    }\n\n    function owner() external view returns (address);\n    function stakingToken() external view returns (address);\n    function fraxPerLPToken() external view returns (uint256);\n    function calcCurCombinedWeight(address account) external view\n        returns (\n            uint256 old_combined_weight,\n            uint256 new_vefxs_multiplier,\n            uint256 new_combined_weight\n        );\n    function lockedStakesOf(address account) external view returns (LockedStake[] memory);\n    function lockedStakesOfLength(address account) external view returns (uint256);\n    function lockAdditional(bytes32 kek_id, uint256 addl_liq) external;\n    function lockLonger(bytes32 kek_id, uint256 new_ending_ts) external;\n    function stakeLocked(uint256 liquidity, uint256 secs) external returns (bytes32);\n    function withdrawLocked(bytes32 kek_id, address destination_address, bool _claim) external returns (uint256);\n\n\n\n    function periodFinish() external view returns (uint256);\n    function lastUpdateTime() external view returns (uint256);\n    function rewardsDuration() external view returns (uint256);\n    function rewardsPerToken() external view returns (uint256[] memory newRewardsPerTokenStored);\n    function getAllRewardTokens() external view returns (address[] memory);\n    function earned(address account) external view returns (uint256[] memory new_earned);\n    function totalLiquidityLocked() external view returns (uint256);\n    function lockedLiquidityOf(address account) external view returns (uint256);\n    function totalCombinedWeight() external view returns (uint256);\n    function combinedWeightOf(address account) external view returns (uint256);\n    function lockMultiplier(uint256 secs) external view returns (uint256);\n    function rewardRates(uint256 token_idx) external view returns (uint256 rwd_rate);\n\n    function userStakedFrax(address account) external view returns (uint256);\n    function proxyStakedFrax(address proxy_address) external view returns (uint256);\n    function maxLPForMaxBoost(address account) external view returns (uint256);\n    function minVeFXSForMaxBoost(address account) external view returns (uint256);\n    function minVeFXSForMaxBoostProxy(address proxy_address) external view returns (uint256);\n    function veFXSMultiplier(address account) external view returns (uint256 vefxs_multiplier);\n\n    function toggleValidVeFXSProxy(address proxy_address) external;\n    function proxyToggleStaker(address staker_address) external;\n    function stakerSetVeFXSProxy(address proxy_address) external;\n    function getReward(address destination_address) external returns (uint256[] memory);\n    function vefxs_max_multiplier() external view returns(uint256);\n    function vefxs_boost_scale_factor() external view returns(uint256);\n    function vefxs_per_frax_for_max_boost() external view returns(uint256);\n    function lock_time_for_max_multiplier() external view returns(uint256);\n    function getProxyFor(address addr) external view returns (address);\n\n    function sync() external;\n    function setRewardVars(address reward_token_address, uint256 _new_rate, address _gauge_controller_address, address _rewards_distributor_address) external;\n    function changeTokenManager(address reward_token_address, address new_manager_address) external;\n}\n"
      },
      "/contracts/interfaces/IFraxFarmBase.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\ninterface IFraxFarmBase{\n\n    function totalLiquidityLocked() external view returns (uint256);\n    function lockedLiquidityOf(address account) external view returns (uint256);\n\n    function toggleValidVeFXSProxy(address proxy_address) external;\n    function proxyToggleStaker(address staker_address) external;\n    function stakerSetVeFXSProxy(address proxy_address) external;\n    function getReward(address destination_address) external returns (uint256[] memory);\n\n}\n"
      },
      "/contracts/interfaces/IFeeRegistry.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IFeeRegistry{\n    function cvxfxsIncentive() external view returns(uint256);\n    function cvxIncentive() external view returns(uint256);\n    function platformIncentive() external view returns(uint256);\n    function totalFees() external view returns(uint256);\n    function maxFees() external view returns(uint256);\n    function feeDeposit() external view returns(address);\n    function getFeeDepositor(address _from) external view returns(address);\n}"
      },
      "/contracts/interfaces/ICurveConvex.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface ICurveConvex {\n   function earmarkRewards(uint256 _pid) external returns(bool);\n   function earmarkFees() external returns(bool);\n   function poolInfo(uint256 _pid) external view returns(address _lptoken, address _token, address _gauge, address _crvRewards, address _stash, bool _shutdown);\n   function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns(bool);\n}"
      },
      "/contracts/interfaces/IConvexWrapperV2.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IConvexWrapperV2{\n\n   struct EarnedData {\n        address token;\n        uint256 amount;\n    }\n\n   struct RewardType {\n        address reward_token;\n        address reward_pool;\n        uint128 reward_integral;\n        uint128 reward_remaining;\n    }\n\n  function distroContract() external view returns(address distro);\n  function collateralVault() external view returns(address vault);\n  function convexPoolId() external view returns(uint256 _poolId);\n  function curveToken() external view returns(address);\n  function convexToken() external view returns(address);\n  function rewardRedirect(address _account) external view returns(address);\n  function balanceOf(address _account) external view returns(uint256);\n  function totalBalanceOf(address _account) external view returns(uint256);\n  function deposit(uint256 _amount, address _to) external;\n  function stake(uint256 _amount, address _to) external;\n  function withdraw(uint256 _amount) external;\n  function withdrawAndUnwrap(uint256 _amount) external;\n  function getReward(address _account) external;\n  function getReward(address _account, address _forwardTo) external;\n  function rewardLength() external view returns(uint256);\n  function rewards(uint256 _index) external view returns(RewardType memory rewardInfo);\n  function earned(address _account) external returns(EarnedData[] memory claimable);\n  function earnedView(address _account) external view returns(EarnedData[] memory claimable);\n  function setVault(address _vault) external;\n  function user_checkpoint(address _account) external returns(bool);\n  function setDistributor(address _vault, address _distro) external;\n  function sealDistributor() external;\n}"
      },
      "/contracts/StakingProxyBase.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"./interfaces/IProxyVault.sol\";\nimport \"./interfaces/IFeeRegistry.sol\";\nimport \"./interfaces/IFraxFarmBase.sol\";\nimport \"./interfaces/IRewards.sol\";\nimport \"./interfaces/IPoolRegistry.sol\";\nimport '@openzeppelin/contracts/token/ERC20/IERC20.sol';\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\n\n\ncontract StakingProxyBase is IProxyVault{\n    using SafeERC20 for IERC20;\n\n    address public constant fxs = address(0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0);\n    address public constant vefxsProxy = address(0x59CFCD384746ec3035299D90782Be065e466800B);\n    address public constant feeRegistry = address(0xC9aCB83ADa68413a6Aa57007BC720EE2E2b3C46D); //fee registry\n    address public constant poolRegistry = address(0x41a5881c17185383e19Df6FA4EC158a6F4851A69); //pool registry\n\n    address public owner; //owner of the vault\n    address public stakingAddress; //farming contract\n    address public stakingToken; //farming token\n    address public rewards; //extra rewards on convex\n    address public usingProxy; //address of proxy being used\n\n    uint256 public constant FEE_DENOMINATOR = 10000;\n    mapping(address => bool) internal usedRewards;\n\n    constructor() {\n    }\n\n    function vaultType() external virtual pure returns(VaultType){\n        return VaultType.Erc20Basic;\n    }\n\n    function vaultVersion() external virtual pure returns(uint256){\n        return 1;\n    }\n\n    modifier onlyOwner() {\n        require(owner == msg.sender, \"!auth\");\n        _;\n    }\n\n    modifier onlyAdmin() {\n        require(vefxsProxy == msg.sender, \"!auth_admin\");\n        _;\n    }\n\n    //initialize vault\n    function initialize(address _owner, address _stakingAddress, address _stakingToken, address _rewardsAddress) public virtual{\n        owner = _owner;\n        stakingAddress = _stakingAddress;\n        stakingToken = _stakingToken;\n        rewards = _rewardsAddress;\n    }\n\n    function changeRewards(address _rewardsAddress) external onlyAdmin{\n        \n        //remove from old rewards and claim\n        if(IRewards(rewards).active()){\n            uint256 bal = IRewards(rewards).balanceOf(address(this));\n            if(bal > 0){\n                IRewards(rewards).withdraw(owner, bal);\n            }\n            IRewards(rewards).getReward(owner);\n        }\n\n        //register old reward contracts\n        usedRewards[rewards] = true;\n\n        //set to new rewards\n        rewards = _rewardsAddress;\n\n        //update balance\n        _checkpointRewards();\n    }\n\n    //checkpoint weight on farm by calling getReward as its the lowest cost thing to do.\n    function checkpointRewards() external onlyAdmin{\n        //checkpoint the frax farm\n        _checkpointFarm();\n    }\n\n    function _checkpointFarm() internal{\n        //claim rewards to local vault as a means to checkpoint\n        IFraxFarmBase(stakingAddress).getReward(address(this));\n    }\n\n    function setVeFXSProxy(address _proxy) external virtual onlyAdmin{\n        //set the vefxs proxy\n        _setVeFXSProxy(_proxy);\n    }\n\n    function _setVeFXSProxy(address _proxyAddress) internal{\n        //set proxy address on staking contract\n        IFraxFarmBase(stakingAddress).stakerSetVeFXSProxy(_proxyAddress);\n        usingProxy = _proxyAddress;\n    }\n\n\n    function getReward() external virtual{}\n    function getReward(bool _claim) external virtual{}\n    function getReward(bool _claim, address[] calldata _rewardTokenList) external virtual{}\n    function earned() external virtual returns (address[] memory token_addresses, uint256[] memory total_earned){}\n\n\n    //checkpoint and add/remove weight to convex rewards contract\n    function _checkpointRewards() internal{\n        //if rewards are active, checkpoint\n        if(IRewards(rewards).active()){\n            //using liquidity shares from staking contract will handle rebasing tokens correctly\n            uint256 userLiq = IFraxFarmBase(stakingAddress).lockedLiquidityOf(address(this));\n            //get current balance of reward contract\n            uint256 bal = IRewards(rewards).balanceOf(address(this));\n            if(userLiq >= bal){\n                //add the difference to reward contract\n                IRewards(rewards).deposit(owner, userLiq - bal);\n            }else{\n                //remove the difference from the reward contract\n                IRewards(rewards).withdraw(owner, bal - userLiq);\n            }\n        }\n    }\n\n    //apply fees to fxs and send remaining to owner\n    function _processFxs() internal{\n\n        //get fee rate from fee registry\n        uint256 totalFees = IFeeRegistry(feeRegistry).totalFees();\n\n        //send fxs fees to fee deposit\n        uint256 fxsBalance = IERC20(fxs).balanceOf(address(this));\n        uint256 sendAmount = fxsBalance * totalFees / FEE_DENOMINATOR;\n        if(sendAmount > 0){\n            IERC20(fxs).transfer(IFeeRegistry(feeRegistry).getFeeDepositor(usingProxy), sendAmount);\n        }\n\n        //transfer remaining fxs to owner\n        sendAmount = IERC20(fxs).balanceOf(address(this));\n        if(sendAmount > 0){\n            IERC20(fxs).transfer(owner, sendAmount);\n        }\n    }\n\n    //get extra rewards\n    function _processExtraRewards() internal{\n        if(IRewards(rewards).active()){\n            //check if there is a balance because the reward contract could have be activated later\n            //dont use _checkpointRewards since difference of 0 will still call deposit() and cost gas\n            uint256 bal = IRewards(rewards).balanceOf(address(this));\n            uint256 userLiq = IFraxFarmBase(stakingAddress).lockedLiquidityOf(address(this));\n            if(bal == 0 && userLiq > 0){\n                //bal == 0 and liq > 0 can only happen if rewards were turned on after staking\n                IRewards(rewards).deposit(owner,userLiq);\n            }\n            IRewards(rewards).getReward(owner);\n        }\n    }\n\n    //transfer other reward tokens besides fxs(which needs to have fees applied)\n    function _transferTokens(address[] memory _tokens) internal{\n        //transfer all tokens\n        for(uint256 i = 0; i < _tokens.length; i++){\n            if(_tokens[i] != fxs){\n                uint256 bal = IERC20(_tokens[i]).balanceOf(address(this));\n                if(bal > 0){\n                    IERC20(_tokens[i]).safeTransfer(owner, bal);\n                }\n            }\n        }\n    }\n\n    //allow arbitrary calls. some targets are blocked\n    function execute(\n        address _to,\n        bytes calldata _data\n    ) external onlyOwner returns (bool, bytes memory) {\n        //fully block fxs, staking token(lp etc), and rewards\n        require(_to != fxs && _to != stakingToken && _to != rewards && !usedRewards[_to], \"!invalid target\");\n\n        //only calls to staking(gauge) address if pool is shutdown\n        if(_to == stakingAddress){\n            require(rewards != address(0),\"!pid\");\n            (, , , , uint8 shutdown) = IPoolRegistry(poolRegistry).poolInfo( IRewards(rewards).poolId() );\n            require(shutdown == 0,\"!shutdown\");\n        }\n\n        (bool success, bytes memory result) = _to.call{value:0}(_data);\n        require(success, \"!success\");\n        return (success, result);\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Address.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\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     * Furthermore, `isContract` will also return true if the target contract within\n     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n     * which only has an effect at the end of a transaction.\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, \"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(address target, bytes memory data, uint256 value) 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        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResultFromTarget(target, 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        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResultFromTarget(target, 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        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n     *\n     * _Available since v4.8._\n     */\n    function verifyCallResultFromTarget(\n        address target,\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        if (success) {\n            if (returndata.length == 0) {\n                // only check isContract if the call was successful and the return data is empty\n                // otherwise we already know that it was a contract\n                require(isContract(target), \"Address: call to non-contract\");\n            }\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    /**\n     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason or 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            _revert(returndata, errorMessage);\n        }\n    }\n\n    function _revert(bytes memory returndata, string memory errorMessage) private pure {\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            /// @solidity memory-safe-assembly\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"
      },
      "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/IERC20Permit.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    /**\n     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeTransfer(IERC20 token, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    /**\n     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the\n     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.\n     */\n    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) 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(IERC20 token, address spender, uint256 value) 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    /**\n     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        uint256 oldAllowance = token.allowance(address(this), spender);\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));\n    }\n\n    /**\n     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));\n        }\n    }\n\n    /**\n     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval\n     * to be set to zero before setting it to a non-zero value, such as USDT.\n     */\n    function forceApprove(IERC20 token, address spender, uint256 value) internal {\n        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);\n\n        if (!_callOptionalReturnBool(token, approvalCall)) {\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));\n            _callOptionalReturn(token, approvalCall);\n        }\n    }\n\n    /**\n     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.\n     * Revert on invalid signature.\n     */\n    function safePermit(\n        IERC20Permit token,\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal {\n        uint256 nonceBefore = token.nonces(owner);\n        token.permit(owner, spender, value, deadline, v, r, s);\n        uint256 nonceAfter = token.nonces(owner);\n        require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\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        require(returndata.length == 0 || abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\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     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.\n     */\n    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {\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 cannot use {Address-functionCall} here since this should return false\n        // and not revert is the subcall reverts.\n\n        (bool success, bytes memory returndata) = address(token).call(data);\n        return\n            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));\n    }\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n *     doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n *     token.safeTransferFrom(msg.sender, address(this), value);\n *     ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20Permit {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n     * given ``owner``'s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``'s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     *\n     * CAUTION: See Security Considerations above.\n     */\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``'s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)\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 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    /**\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 `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, 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 `from` to `to` 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(address from, address to, uint256 amount) external returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot's contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler's defense against contract upgrades and\n    // pointer aliasing, and it cannot be disabled.\n\n    // The values being non-zero value makes deployment a bit more expensive,\n    // but in exchange the refund on every call to nonReentrant will be lower in\n    // amount. Since refunds are capped to a percentage of the total\n    // transaction's gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor() {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        _nonReentrantBefore();\n        _;\n        _nonReentrantAfter();\n    }\n\n    function _nonReentrantBefore() private {\n        // On the first call to nonReentrant, _status will be _NOT_ENTERED\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n    }\n\n    function _nonReentrantAfter() private {\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Returns true if the reentrancy guard is currently set to \"entered\", which indicates there is a\n     * `nonReentrant` function in the call stack.\n     */\n    function _reentrancyGuardEntered() internal view returns (bool) {\n        return _status == _ENTERED;\n    }\n}\n"
      }
    },
    "settings": {
      "remappings": [],
      "optimizer": {
        "enabled": true,
        "runs": 200
      },
      "evmVersion": "london",
      "libraries": {},
      "outputSelection": {
        "*": {
          "*": [
            "evm.bytecode",
            "evm.deployedBytecode",
            "devdoc",
            "userdoc",
            "metadata",
            "abi"
          ]
        }
      }
    }
  }}