creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "/contracts/boosting/StakingProxyERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"./StakingProxyBase.sol\";\nimport \"../interfaces/IFxnGauge.sol\";\nimport '@openzeppelin/contracts/security/ReentrancyGuard.sol';\n\n/*\nVault implementation for basic erc20 tokens\n*/\ncontract StakingProxyERC20 is StakingProxyBase, ReentrancyGuard{\n    using SafeERC20 for IERC20;\n\n    constructor(address _poolRegistry, address _feeRegistry, address _fxnminter) \n        StakingProxyBase(_poolRegistry, _feeRegistry, _fxnminter){\n    }\n\n    //vault type\n    function vaultType() external pure override returns(VaultType){\n        return VaultType.Erc20Basic;\n    }\n\n    //vault version\n    function vaultVersion() external pure override returns(uint256){\n        return 1;\n    }\n\n    //initialize vault\n    function initialize(address _owner, uint256 _pid) public override{\n        super.initialize(_owner, _pid);\n\n        //set infinite approval\n        IERC20(stakingToken).approve(gaugeAddress, type(uint256).max);\n\n        //set extra rewards to send directly back to owner\n        //..could technically save gas on initialize() by using claim(address,address) but\n        //since claim is unguarded would be better UX to set receiver in case called by some other address\n        IFxnGauge(gaugeAddress).setRewardReceiver(_owner);\n    }\n\n\n    //deposit into gauge\n    function deposit(uint256 _amount) external onlyOwner nonReentrant{\n        if(_amount > 0){\n            //pull tokens from user\n            address _stakingToken = stakingToken;\n            IERC20(_stakingToken).safeTransferFrom(msg.sender, address(this), _amount);\n\n            //stake (use balanceof in case of change during transfer)\n            IFxnGauge(gaugeAddress).deposit(IERC20(_stakingToken).balanceOf(address(this)));\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n    //deposit into gauge with manage flag\n    function deposit(uint256 _amount, bool _manage) external onlyOwner nonReentrant{\n        if(_amount > 0){\n            //pull tokens from user\n            address _stakingToken = stakingToken;\n            IERC20(_stakingToken).safeTransferFrom(msg.sender, address(this), _amount);\n\n            //stake (use balanceof in case of change during transfer)\n            IFxnGauge(gaugeAddress).deposit(IERC20(_stakingToken).balanceOf(address(this)), address(this), _manage);\n        }\n        \n        //checkpoint rewards\n        _checkpointRewards();\n    }\n\n\n    //withdraw a staked position\n    function withdraw(uint256 _amount) external onlyOwner nonReentrant{\n\n        //withdraw to vault\n        IFxnGauge(gaugeAddress).withdraw(_amount);\n\n        //checkpoint rewards\n        _checkpointRewards();\n\n        //send back to owner any staking tokens on the vault (may differ from _amount)\n        address _stakingToken = stakingToken;\n        IERC20(_stakingToken).safeTransfer(msg.sender, IERC20(_stakingToken).balanceOf(address(this)));\n    }\n\n\n    //return 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 = IFxnGauge(gaugeAddress).getActiveRewardTokens();\n\n        //create array of rewards on gauge, rewards on extra reward contract, and fxn that is minted\n        address _rewards = rewards;\n        token_addresses = new address[](rewardTokens.length + IRewards(_rewards).rewardTokenLength() + 1);// +1 for fxn\n        total_earned = new uint256[](rewardTokens.length + IRewards(_rewards).rewardTokenLength() + 1); // +1 for fxn\n\n        //simulate claiming\n\n        //mint fxn\n        try IFxnTokenMinter(fxnMinter).mint(gaugeAddress){}catch{}\n        \n        //check fxn\n        token_addresses[0] = fxn;\n        //remove fee (assumes all fxn on vault came from minting)\n        total_earned[0] = IERC20(fxn).balanceOf(address(this)) * (FEE_DENOMINATOR - IFeeRegistry(feeRegistry).totalFees()) / FEE_DENOMINATOR;\n\n        //claim other rewards on gauge to this address to tally\n        IFxnGauge(gaugeAddress).claim(address(this),address(this));\n\n        //get balance of tokens\n        for(uint256 i = 0; i < rewardTokens.length; i++){\n            token_addresses[i+1] = rewardTokens[i];\n            if(rewardTokens[i] == fxn){\n                //if more fxn was distributed as an extra reward, add difference of current-minted\n                total_earned[i+1] = IERC20(rewardTokens[i]).balanceOf(address(this)) - total_earned[0];\n            }else{\n                total_earned[i+1] = IERC20(rewardTokens[i]).balanceOf(address(this));\n            }\n        }\n\n        //also add an extra rewards from convex's side\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+1] = extraRewards[i].token;\n            total_earned[i+rewardTokens.length+1] = extraRewards[i].amount;\n        }\n    }\n\n    /*\n    claim flow:\n        mint fxn rewards directly to vault\n        claim extra rewards directly to the owner\n        calculate fees on fxn\n        distribute fxn between owner and fee deposit\n    */\n    function getReward() external override{\n        getReward(true);\n    }\n\n    //get reward with claim option.\n    function getReward(bool _claim) public override{\n\n        //claim\n        if(_claim){\n            //fxn rewards (claim here first then send to user after fees)\n            try IFxnTokenMinter(fxnMinter).mint(gaugeAddress){}catch{}\n\n            //extras (will get claimed directly to owner)\n            IFxnGauge(gaugeAddress).claim();\n        }\n\n        //process fxn fees\n        _processFxn();\n\n        //extra rewards\n        _processExtraRewards();\n    }\n\n    //get reward with claim option, as well as a specific token list to claim from convex extra rewards\n    function getReward(bool _claim, address[] calldata _tokenList) external override{\n\n        //claim\n        if(_claim){\n            //fxn rewards\n            try IFxnTokenMinter(fxnMinter).mint(gaugeAddress){}catch{}\n\n            //extras\n            IFxnGauge(gaugeAddress).claim();\n        }\n\n        //process fxn fees\n        _processFxn();\n\n        //extra rewards\n        _processExtraRewardsFilter(_tokenList);\n    }\n\n    //return any tokens in vault back to owner\n    function transferTokens(address[] calldata _tokenList) external onlyOwner{\n        //transfer tokens back to owner\n        //fxn and gauge tokens are skipped\n        _transferTokens(_tokenList);\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    enum RewardState{\n        NotInitialized,\n        NoRewards,\n        Active\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 getRewardFilter(address _forward, address[] calldata _tokens) 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 rewardState() external view returns(RewardState);\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        RebalancePool\n    }\n\n    function vaultType() external view returns(VaultType);\n    function vaultVersion() external view returns(uint256);\n    function initialize(address _owner, uint256 _pid) external;\n    function pid() external returns(uint256);\n    function usingProxy() external returns(address);\n    function owner() external returns(address);\n    function gaugeAddress() external returns(address);\n    function stakingToken() 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/IFxnTokenMinter.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\n// solhint-disable func-name-mixedcase\ninterface IFxnTokenMinter {\n  function token() external view returns (address);\n\n  function controller() external view returns (address);\n\n  function minted(address user, address gauge) external view returns (uint256);\n\n  function mint(address gauge_addr) external;\n\n  function mint_many(address[8] memory gauges) external;\n\n  function mint_for(address gauge, address _for) external;\n\n  function toggle_approve_mint(address _user) external;\n}"
      },
      "/contracts/interfaces/IFxnGauge.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\ninterface IFxnGauge{\n\n    //basics\n    function stakingToken() external view returns(address);\n    function totalSupply() external view returns(uint256);\n    function workingSupply() external view returns(uint256);\n    function workingBalanceOf(address _account) external view returns(uint256);\n    function deposit(uint256 _amount) external;\n    function deposit(uint256 _amount, address _receiver) external;\n    function deposit(uint256 _amount, address _receiver, bool _manage) external;\n    function withdraw(uint256 _amount) external;\n    function withdraw(uint256 _amount, address _receiver) external;\n    function user_checkpoint(address _account) external returns (bool);\n    function balanceOf(address _account) external view returns(uint256);\n    function integrate_fraction(address account) external view returns (uint256);\n    function baseToken() external view returns(address);\n    function asset() external view returns(address);\n    function market() external view returns(address);\n\n    //weight sharing\n    function toggleVoteSharing(address _staker) external;\n    function acceptSharedVote(address _newOwner) external;\n    function rejectSharedVote() external;\n    function getStakerVoteOwner(address _account) external view returns (address);\n    function numAcceptedStakers(address _account) external view returns (uint256);\n    function sharedBalanceOf(address _account) external view returns (uint256);\n    function veProxy() external view returns(address);\n\n    //rewards\n    function rewardData(address _token) external view returns(uint96 queued, uint80 rate, uint40 lastUpdate, uint40 finishAt);\n    function getActiveRewardTokens() external view returns (address[] memory _rewardTokens);\n    function rewardReceiver(address account) external view returns (address);\n    function setRewardReceiver(address _newReceiver) external;\n    function claim() external;\n    function claim(address account) external;\n    function claim(address account, address receiver) external;\n    function getBoostRatio(address _account) external view returns (uint256);\n    function depositReward(address _token, uint256 _amount) external;\n    function voteOwnerBalances(address _account) external view returns(uint112 product, uint104 amount, uint40 updateAt);\n}\n"
      },
      "/contracts/interfaces/IFeeRegistry.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\ninterface IFeeRegistry{\n    function cvxfxnIncentive() 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/boosting/StakingProxyBase.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"../interfaces/IProxyVault.sol\";\nimport \"../interfaces/IFeeRegistry.sol\";\nimport \"../interfaces/IFxnGauge.sol\";\nimport \"../interfaces/IFxnTokenMinter.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/*\nBase class for vaults\n\n*/\ncontract StakingProxyBase is IProxyVault{\n    using SafeERC20 for IERC20;\n\n    address public constant fxn = address(0x365AccFCa291e7D3914637ABf1F7635dB165Bb09);\n    address public constant vefxnProxy = address(0xd11a4Ee017cA0BECA8FA45fF2abFe9C6267b7881);\n    address public immutable feeRegistry;\n    address public immutable poolRegistry;\n    address public immutable fxnMinter;\n\n    address public owner; //owner of the vault\n    address public gaugeAddress; //gauge contract\n    address public stakingToken; //staking token\n    address public rewards; //extra rewards on convex\n    address public usingProxy; //address of proxy being used\n    uint256 public pid;\n\n    uint256 public constant FEE_DENOMINATOR = 10000;\n\n    constructor(address _poolRegistry, address _feeRegistry, address _fxnminter){\n        poolRegistry = _poolRegistry;\n        feeRegistry = _feeRegistry;\n        fxnMinter = _fxnminter;\n    }\n\n    modifier onlyOwner() {\n        require(owner == msg.sender, \"!auth\");\n        _;\n    }\n\n    modifier onlyAdmin() {\n        require(vefxnProxy == msg.sender, \"!auth_admin\");\n        _;\n    }\n\n    //vault type\n    function vaultType() external virtual pure returns(VaultType){\n        return VaultType.Erc20Basic;\n    }\n\n    //vault version\n    function vaultVersion() external virtual pure returns(uint256){\n        return 1;\n    }\n\n    //initialize vault\n    function initialize(address _owner, uint256 _pid) public virtual{\n        require(owner == address(0),\"already init\");\n        owner = _owner;\n        pid = _pid;\n\n        //get pool info\n        (,gaugeAddress, stakingToken, rewards,) = IPoolRegistry(poolRegistry).poolInfo(_pid);\n    }\n\n    //set what veFXN proxy this vault is using\n    function setVeFXNProxy(address _proxy) external virtual onlyAdmin{\n        //set the vefxn proxy\n        _setVeFXNProxy(_proxy);\n    }\n\n    //set veFXN proxy the vault is using. call acceptSharedVote to start sharing vefxn proxy's boost\n    function _setVeFXNProxy(address _proxyAddress) internal{\n        //set proxy address on staking contract\n        IFxnGauge(gaugeAddress).acceptSharedVote(_proxyAddress);\n        if(_proxyAddress == vefxnProxy){\n            //reset back to address 0 to default to convex's proxy, dont write if not needed.\n            if(usingProxy != address(0)){\n                usingProxy = address(0);\n            }\n        }else{\n            //write non-default proxy address\n            usingProxy = _proxyAddress;\n        }\n    }\n\n    //get rewards and earned are type specific. extend in child class\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        address _rewards = rewards;\n        if(IRewards(_rewards).rewardState() == IRewards.RewardState.Active){\n            //get user balance from the gauge\n            uint256 userLiq = IFxnGauge(gaugeAddress).balanceOf(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 fxn and send remaining to owner\n    function _processFxn() internal{\n\n        //get fee rate from fee registry (only need to know total, let deposit contract disperse itself)\n        uint256 totalFees = IFeeRegistry(feeRegistry).totalFees();\n\n        //send fxn fees to fee deposit\n        uint256 fxnBalance = IERC20(fxn).balanceOf(address(this));\n        uint256 sendAmount = fxnBalance * totalFees / FEE_DENOMINATOR;\n        if(sendAmount > 0){\n            //get deposit address for given proxy (address 0 will be handled by fee registry to return default convex proxy)\n            IERC20(fxn).transfer(IFeeRegistry(feeRegistry).getFeeDepositor(usingProxy), sendAmount);\n        }\n\n        //transfer remaining fxn to owner\n        sendAmount = IERC20(fxn).balanceOf(address(this));\n        if(sendAmount > 0){\n            IERC20(fxn).transfer(owner, sendAmount);\n        }\n    }\n\n    //get extra rewards (convex side)\n    function _processExtraRewards() internal{\n        address _rewards = rewards;\n        if(IRewards(_rewards).rewardState() == IRewards.RewardState.Active){\n            //update reward balance if this is the first call since reward contract activation:\n            //check if no balance recorded yet and set staked balance\n            //dont use _checkpointRewards since difference of 0 will still call deposit()\n            //as well as it will check rewardState twice\n            uint256 bal = IRewards(_rewards).balanceOf(address(this));\n            uint256 gaugeBalance = IFxnGauge(gaugeAddress).balanceOf(address(this));\n            if(bal == 0 && gaugeBalance > 0){\n                //set balance to gauge.balanceof(this)\n                IRewards(_rewards).deposit(owner,gaugeBalance);\n            }\n\n            //get the rewards\n            IRewards(_rewards).getReward(owner);\n        }\n    }\n\n    //get extra rewards (convex side) with a filter list\n    function _processExtraRewardsFilter(address[] calldata _tokens) internal{\n        address _rewards = rewards;\n        if(IRewards(_rewards).rewardState() == IRewards.RewardState.Active){\n            //update reward balance if this is the first call since reward contract activation:\n            //check if no balance recorded yet and set staked balance\n            //dont use _checkpointRewards since difference of 0 will still call deposit()\n            //as well as it will check rewardState twice\n            uint256 bal = IRewards(_rewards).balanceOf(address(this));\n            uint256 gaugeBalance = IFxnGauge(gaugeAddress).balanceOf(address(this));\n            if(bal == 0 && gaugeBalance > 0){\n                //set balance to gauge.balanceof(this)\n                IRewards(_rewards).deposit(owner,gaugeBalance);\n            }\n\n            //get the rewards\n            IRewards(_rewards).getRewardFilter(owner,_tokens);\n        }\n    }\n\n    //transfer other reward tokens besides fxn(which needs to have fees applied)\n    //also block gauge tokens from being transfered out\n    function _transferTokens(address[] memory _tokens) internal{\n        //transfer all tokens\n        for(uint256 i = 0; i < _tokens.length; i++){\n            //dont allow fxn (need to take fee)\n            //dont allow gauge token transfer\n            if(_tokens[i] != fxn && _tokens[i] != gaugeAddress){\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    function _checkExecutable(address _address) internal virtual{\n        require(_address != fxn && _address != stakingToken && _address != rewards, \"!invalid target\");\n    }\n\n    //allow arbitrary calls. some function signatures and targets are blocked\n    function execute(\n        address _to,\n        uint256 _value,\n        bytes calldata _data\n    ) external onlyOwner returns (bool, bytes memory) {\n        //fully block fxn, staking token(lp etc), and rewards\n        _checkExecutable(_to);\n\n        //only calls to staking(gauge) address if pool is shutdown\n        if(_to == gaugeAddress){\n            (, , , , uint8 shutdown) = IPoolRegistry(poolRegistry).poolInfo(pid);\n            require(shutdown == 0,\"!shutdown\");\n        }\n\n        (bool success, bytes memory result) = _to.call{value:_value}(_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"
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  }}