// File: contracts/strategies/eth/utility/ClaimingNativeStrat.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/math/Math.sol';

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';

import '../../../utils/Constants.sol';
import '../../../interfaces/IZunami.sol';
import '../../../interfaces/IStrategy.sol';

//import "hardhat/console.sol";

contract ClaimingNativeStrat is Ownable {
    using SafeERC20 for IERC20Metadata;

    enum WithdrawalType {
        Base,
        OneCoin
    }

    uint8 public constant POOL_ASSETS = 5;
    uint8 public constant STRATEGY_ASSETS = 3;

    address public constant ETH_MOCK_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    IZunami public zunami;
    IERC20Metadata[STRATEGY_ASSETS] public tokens;

    uint256 public managementFees = 0;

    struct Claim {
        address claimer;
        uint256 balance;
        uint256 batch;
        bool withdrew;
    }

    uint256 public totalBalance;
    uint256 public currentBatch = 1;

    mapping(address => Claim) public claims;

    mapping(uint256 => uint256) public batchesTotalBalance;
    mapping(uint256 => bool) public batchesFinished;
    mapping(uint256 => uint256[STRATEGY_ASSETS]) public batchesAmounts;

    event NewBatchStarted(uint256 previousBatch, uint256 newBatch);
    event BatchFinished(uint256 batchFinished, uint256[STRATEGY_ASSETS] totalBatchAmounts);

    event ClaimCreated(address indexed claimer, uint256 balance);
    event ClaimRequested(address indexed claimer, uint256 inBatch);
    event ClaimWithdrew(address indexed claimer, uint256[STRATEGY_ASSETS] tokenAmounts);

    modifier onlyZunami() {
        require(_msgSender() == address(zunami), 'must be called by Zunami contract');
        _;
    }

    constructor(IERC20Metadata[STRATEGY_ASSETS] memory _tokens) {
        tokens = _tokens;
    }

    receive() external payable {
        // receive ETH after unwrap
    }

    function startNewBatch() external onlyOwner {
        require(
            currentBatch == 1 || (currentBatch > 1 && batchesFinished[currentBatch - 1]),
            "Not finished previous batch"
        );
        currentBatch += 1;
        emit NewBatchStarted(currentBatch - 1, currentBatch);
    }

    function finishPreviousBatch(uint256[STRATEGY_ASSETS] memory _batchAmounts) external onlyOwner {
        require(_batchAmounts[0] > 0 || _batchAmounts[1] > 0 || _batchAmounts[2] > 0, "Wrong amounts");
        uint256 previousBatch = currentBatch - 1;
        require(currentBatch > 1 && !batchesFinished[previousBatch], "Not started second or already finished");
        batchesFinished[previousBatch] = true;
        batchesAmounts[previousBatch] = _batchAmounts;
        emit BatchFinished(previousBatch, _batchAmounts);
    }

    function createClaims(address[] memory _claimers, uint256[] memory _balances) external onlyOwner {
        require(_claimers.length == _balances.length, "Wrong length");
        for(uint256 i = 0; i < _claimers.length; i++) {
            address claimer = _claimers[i];
            uint256 balance = _balances[i];
            require(claims[claimer].balance == 0, "Doubled claim");
            require(balance > 0, "Zero balance");
            require(claimer != address(0), "Zero claimer");
            totalBalance += balance;
            claims[claimer] = Claim(claimer, balance, 0, false);
            emit ClaimCreated(claimer, balance);
        }
    }

    function requestClaim() external {
        address claimer = msg.sender;
        Claim storage claim = claims[claimer];
        require(claim.balance != 0, "Wrong claimer");
        require(claim.batch == 0, "Requested claim");
        claim.batch = currentBatch;
        batchesTotalBalance[currentBatch] += claim.balance;
        emit ClaimRequested(claimer, currentBatch);
    }

    function canWithdrawClaim() external view returns(bool) {
        address claimer = msg.sender;
        Claim memory claim = claims[claimer];
        return (claim.balance != 0)
            && (claim.batch != 0)
            && (!claim.withdrew)
            && (batchesFinished[claim.batch]);
    }

    function withdrawClaim() external {
        address claimer = msg.sender;
        Claim storage claim = claims[claimer];
        require(claim.balance != 0, "Wrong claimer");
        require(claim.batch != 0, "Not requested claim");
        require(!claim.withdrew, "Claim was withdrew");
        require(batchesFinished[claim.batch], "Not finished batch");
        claim.withdrew = true;
        uint256[STRATEGY_ASSETS] memory tokenAmounts = transferPortionTokensToBatch(
            claimer,
            claim.batch,
            Math.mulDiv(claim.balance, 1e18, batchesTotalBalance[claim.batch], Math.Rounding.Down)
        );

        emit ClaimWithdrew(claimer, tokenAmounts);
    }

    function transferPortionTokensToBatch(address claimer, uint256 batch, uint256 batchProportion) internal returns(uint256[3] memory transfersAmountOut){
        uint256[STRATEGY_ASSETS] memory batchAmounts = batchesAmounts[batch];
        for (uint256 i = 0; i < 3; i++) {
            uint256 batchAmount = batchAmounts[i];
            if(batchAmount == 0) continue;
            transfersAmountOut[i] = Math.mulDiv(batchAmount, batchProportion, 1e18, Math.Rounding.Down);
            if (transfersAmountOut[i] > 0) {
                safeTransferNative(tokens[i], claimer, transfersAmountOut[i]);
            }
        }
    }



    // Zunami strategy interface
    function withdrawAll() external onlyZunami {
        transferAllTokensTo(address(zunami));
    }

    function transferAllTokensTo(address withdrawer) internal {
        uint256 tokenStratBalance;
        IERC20Metadata token_;
        for (uint256 i = 0; i < STRATEGY_ASSETS; i++) {
            token_ = tokens[i];
            tokenStratBalance = balanceOfNative(token_);
            if (tokenStratBalance > 0) {
                safeTransferNative(token_, withdrawer, tokenStratBalance);
            }
        }
    }

    function deposit(uint256[POOL_ASSETS] memory amounts) external payable returns (uint256) {
        uint256 depositedAmount;
        for (uint256 i = 0; i < STRATEGY_ASSETS; i++) {
            if (amounts[i] > 0) {
                depositedAmount += amounts[i];
            }
        }

        return depositedAmount;
    }

    function withdraw(
        address withdrawer,
        uint256 userRatioOfCrvLps, // multiplied by 1e18
        uint256[POOL_ASSETS] memory,
        WithdrawalType,
        uint128
    ) external virtual onlyZunami returns (bool) {
        revert();
    }

    function autoCompound() public onlyZunami returns (uint256) {
        return 0;
    }

    function totalHoldings() public view virtual returns (uint256) {
        uint256 tokensHoldings = 0;
        for (uint256 i = 0; i < STRATEGY_ASSETS; i++) {
            tokensHoldings += balanceOfNative(tokens[i]);
        }
        return tokensHoldings;
    }

    function renounceOwnership() public view override onlyOwner {
        revert('The strategy must have an owner');
    }

    function setZunami(address zunamiAddr) external onlyOwner {
        zunami = IZunami(zunamiAddr);
    }

    function withdrawStuckToken(IERC20Metadata _token) external onlyOwner {
        uint256 tokenBalance = balanceOfNative(_token);
        if (tokenBalance > 0) {
            safeTransferNative(_token, _msgSender(), tokenBalance);
        }
    }

    function claimManagementFees() external returns (uint256) {
        return 0;
    }

    function balanceOfNative(IERC20Metadata token_) internal view returns (uint256) {
        if (address(token_) == ETH_MOCK_ADDRESS) {
            return address(this).balance;
        } else {
            return token_.balanceOf(address(this));
        }
    }

    function safeTransferNative(
        IERC20Metadata token,
        address receiver,
        uint256 amount
    ) internal {
        if (address(token) == ETH_MOCK_ADDRESS) {
            receiver.call{ value: amount }(''); // don't fail if user contract doesn't accept ETH
        } else {
            token.safeTransfer(receiver, amount);
        }
    }
}

// File: contracts/utils/Constants.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

library Constants {
    bytes32 internal constant USDC_TICKER = 'usdc';
    bytes32 internal constant USDT_TICKER = 'usdt';
    bytes32 internal constant DAI_TICKER = 'dai';
    bytes32 internal constant CRV_TICKER = 'a3CRV';

    uint256 internal constant CVX_BUSD_PID = 3;
    uint256 internal constant CVX_SUSD_PID = 4;
    uint256 internal constant CVX_USDK_PID = 12;
    uint256 internal constant CVX_USDN_PID = 13;
    uint256 internal constant CVX_MUSD_PID = 14;
    uint256 internal constant CVX_RSV_PID = 15;
    uint256 internal constant CVX_DUSD_PID = 17;
    uint256 internal constant CVX_FRAX_alUSD_PID = 19;
    uint256 internal constant CVX_AAVE_PID = 24;
    uint256 internal constant CVX_USDP_PID = 28;
    uint256 internal constant CVX_IRONBANK_PID = 29;
    uint256 internal constant CVX_TUSD_PID = 31;
    uint256 internal constant CVX_FRAX_PID = 32;
    uint256 internal constant CVX_LUSD_PID = 33;
    uint256 internal constant CVX_BUSDV2_PID = 34;
    uint256 internal constant CVX_FRAX_XAI_PID = 38;
    uint256 internal constant CVX_MIM_PID = 40;
    uint256 internal constant CVX_OUSD_PID = 56;
    uint256 internal constant CVX_UST_PID = 59;
    uint256 internal constant CVX_D3_PID = 58;
    uint256 internal constant CVX_PUSD_PID = 91;
    uint256 internal constant CVX_USDD_PID = 96;
    uint256 internal constant CVX_DOLA_PID = 62;
    uint256 internal constant CVX_FRAX_LUSD_PID = 102;
    uint256 internal constant CVX_FRAX_ALUSD_PID = 106;

    uint256 internal constant CVX_ETH_frxETH_PID = 36;

    uint256 internal constant TRADE_DEADLINE = 2000;

    address internal constant CVX_ADDRESS = 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B;
    address internal constant CRV_ADDRESS = 0xD533a949740bb3306d119CC777fa900bA034cd52;
    address internal constant FXS_ADDRESS = 0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0;
    address internal constant USDC_ADDRESS = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
    address internal constant USDT_ADDRESS = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
    address internal constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
    address internal constant TUSD_ADDRESS = 0x0000000000085d4780B73119b644AE5ecd22b376;
    address internal constant SUSD_ADDRESS = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51;
    address internal constant BUSD_ADDRESS = 0x4Fabb145d64652a948d72533023f6E7A623C7C53;
    address internal constant OUSD_ADDRESS = 0x2A8e1E676Ec238d8A992307B495b45B3fEAa5e86;
    address internal constant MUSD_ADDRESS = 0xe2f2a5C287993345a840Db3B0845fbC70f5935a5;
    address internal constant MIM_ADDRESS = 0x99D8a9C45b2ecA8864373A26D1459e3Dff1e17F3;
    address internal constant SPELL_ADDRESS = 0x090185f2135308BaD17527004364eBcC2D37e5F6;
    address internal constant DUSD_ADDRESS = 0x5BC25f649fc4e26069dDF4cF4010F9f706c23831;
    address internal constant ALUSD_ADDRESS = 0xBC6DA0FE9aD5f3b0d58160288917AA56653660E9;
    address internal constant LUSD_ADDRESS = 0x5f98805A4E8be255a32880FDeC7F6728C6568bA0;
    address internal constant USDP_ADDRESS = 0x1456688345527bE1f37E9e627DA0837D6f08C925;
    address internal constant USDN_ADDRESS = 0x674C6Ad92Fd080e4004b2312b45f796a192D27a0;
    address internal constant USDK_ADDRESS = 0x1c48f86ae57291F7686349F12601910BD8D470bb;
    address internal constant FRAX_ADDRESS = 0x853d955aCEf822Db058eb8505911ED77F175b99e;
    address internal constant FRX_ETH_ADDRESS = 0x5E8422345238F34275888049021821E8E08CAa1f;
    address internal constant RSV_ADDRESS = 0x196f4727526eA7FB1e17b2071B3d8eAA38486988;
    address internal constant UST_ADDRESS = 0xa47c8bf37f92aBed4A126BDA807A7b7498661acD;
    address internal constant PUSD_ADDRESS = 0x466a756E9A7401B5e2444a3fCB3c2C12FBEa0a54;
    address internal constant USDD_ADDRESS = 0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6;
    address internal constant DOLA_ADDRESS = 0x865377367054516e17014CcdED1e7d814EDC9ce4;
    address internal constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address internal constant SUSHI_ROUTER_ADDRESS = 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F;
    address internal constant SUSHI_CRV_WETH_ADDRESS = 0x58Dc5a51fE44589BEb22E8CE67720B5BC5378009;
    address internal constant SUSHI_WETH_CVX_ADDRESS = 0x05767d9EF41dC40689678fFca0608878fb3dE906;
    address internal constant SUSHI_WETH_USDT_ADDRESS = 0x06da0fd433C1A5d7a4faa01111c044910A184553;
    address internal constant CVX_BOOSTER_ADDRESS = 0xF403C135812408BFbE8713b5A23a04b3D48AAE31;
    address internal constant CRV_3POOL_ADDRESS = 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7;
    address internal constant CRV_3POOL_LP_ADDRESS = 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490;
    address internal constant CRV_AAVE_ADDRESS = 0xDeBF20617708857ebe4F679508E7b7863a8A8EeE;
    address internal constant CRV_AAVE_LP_ADDRESS = 0xFd2a8fA60Abd58Efe3EeE34dd494cD491dC14900;
    address internal constant CVX_AAVE_REWARDS_ADDRESS = 0xE82c1eB4BC6F92f85BF7EB6421ab3b882C3F5a7B;
    address internal constant CRV_IRONBANK_ADDRESS = 0x2dded6Da1BF5DBdF597C45fcFaa3194e53EcfeAF;
    address internal constant CRV_IRONBANK_LP_ADDRESS = 0x5282a4eF67D9C33135340fB3289cc1711c13638C;
    address internal constant CVX_IRONBANK_REWARDS_ADDRESS =
        0x3E03fFF82F77073cc590b656D42FceB12E4910A8;
    address internal constant CRV_TUSD_ADDRESS = 0xEcd5e75AFb02eFa118AF914515D6521aaBd189F1;
    address internal constant CRV_TUSD_LP_ADDRESS = 0xEcd5e75AFb02eFa118AF914515D6521aaBd189F1;
    address internal constant CVX_TUSD_REWARDS_ADDRESS = 0x308b48F037AAa75406426dACFACA864ebd88eDbA;
    address internal constant CRV_SUSD_ADDRESS = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD;
    address internal constant CRV_SUSD_LP_ADDRESS = 0xC25a3A3b969415c80451098fa907EC722572917F;
    address internal constant CVX_SUSD_REWARDS_ADDRESS = 0x22eE18aca7F3Ee920D01F25dA85840D12d98E8Ca;
    address internal constant CVX_SUSD_EXTRA_ADDRESS = 0x81fCe3E10D12Da6c7266a1A169c4C96813435263;
    address internal constant SUSD_EXTRA_ADDRESS = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F;
    address internal constant SUSD_EXTRA_PAIR_ADDRESS = 0xA1d7b2d891e3A1f9ef4bBC5be20630C2FEB1c470;
    address internal constant CRV_USDK_ADDRESS = 0x3E01dD8a5E1fb3481F0F589056b428Fc308AF0Fb;
    address internal constant CRV_USDK_LP_ADDRESS = 0x97E2768e8E73511cA874545DC5Ff8067eB19B787;
    address internal constant CVX_USDK_REWARDS_ADDRESS = 0xa50e9071aCaD20b31cd2bbe4dAa816882De82BBe;
    address internal constant CRV_USDP_ADDRESS = 0x42d7025938bEc20B69cBae5A77421082407f053A;
    address internal constant CRV_USDP_LP_ADDRESS = 0x7Eb40E450b9655f4B3cC4259BCC731c63ff55ae6;
    address internal constant CVX_USDP_REWARDS_ADDRESS = 0x24DfFd1949F888F91A0c8341Fc98a3F280a782a8;
    address internal constant CVX_USDP_EXTRA_ADDRESS = 0x5F91615268bE6b4aDD646b2560785B8F17dccBb4;
    address internal constant USDP_EXTRA_ADDRESS = 0x92E187a03B6CD19CB6AF293ba17F2745Fd2357D5;
    address internal constant USDP_EXTRA_PAIR_ADDRESS = 0x69aa90C6cD099BF383Bd9A0ac29E61BbCbF3b8D9;
    address internal constant CRV_BUSD_ADDRESS = 0x79a8C46DeA5aDa233ABaFFD40F3A0A2B1e5A4F27;
    address internal constant CRV_BUSD_LP_ADDRESS = 0x3B3Ac5386837Dc563660FB6a0937DFAa5924333B;
    address internal constant CVX_BUSD_REWARDS_ADDRESS = 0x602c4cD53a715D8a7cf648540FAb0d3a2d546560;
    address internal constant CRV_BUSDV2_ADDRESS = 0x4807862AA8b2bF68830e4C8dc86D0e9A998e085a;
    address internal constant CRV_BUSDV2_LP_ADDRESS = 0x4807862AA8b2bF68830e4C8dc86D0e9A998e085a;
    address internal constant CVX_BUSDV2_REWARDS_ADDRESS =
        0xbD223812d360C9587921292D0644D18aDb6a2ad0;
    address internal constant CRV_OUSD_ADDRESS = 0x87650D7bbfC3A9F10587d7778206671719d9910D;
    address internal constant CRV_OUSD_LP_ADDRESS = 0x87650D7bbfC3A9F10587d7778206671719d9910D;
    address internal constant CRV_OUSD_EXTRA_ADDRESS = 0x8A05801c1512F6018e450b0F69e9Ca7b985fCea3;
    address internal constant OUSD_EXTRA_ADDRESS = 0x8207c1FfC5B6804F6024322CcF34F29c3541Ae26;
    address internal constant OUSD_EXTRA_PAIR_ADDRESS = 0x72ea6Ca0D47b337f1EA44314d9d90E2A897eDaF5;
    address internal constant CVX_OUSD_REWARDS_ADDRESS = 0x7D536a737C13561e0D2Decf1152a653B4e615158;
    address internal constant CRV_USDN_ADDRESS = 0x0f9cb53Ebe405d49A0bbdBD291A65Ff571bC83e1;
    address internal constant CRV_USDN_LP_ADDRESS = 0x4f3E8F405CF5aFC05D68142F3783bDfE13811522;
    address internal constant CVX_USDN_REWARDS_ADDRESS = 0x4a2631d090e8b40bBDe245e687BF09e5e534A239;
    address internal constant CRV_LUSD_ADDRESS = 0xEd279fDD11cA84bEef15AF5D39BB4d4bEE23F0cA;
    address internal constant CRV_LUSD_LP_ADDRESS = 0xEd279fDD11cA84bEef15AF5D39BB4d4bEE23F0cA;
    address internal constant CVX_LUSD_REWARDS_ADDRESS = 0x2ad92A7aE036a038ff02B96c88de868ddf3f8190;
    address internal constant CRV_MUSD_ADDRESS = 0x8474DdbE98F5aA3179B3B3F5942D724aFcdec9f6;
    address internal constant CRV_MUSD_LP_ADDRESS = 0x1AEf73d49Dedc4b1778d0706583995958Dc862e6;
    address internal constant CVX_MUSD_REWARDS_ADDRESS = 0xDBFa6187C79f4fE4Cda20609E75760C5AaE88e52;
    address internal constant CVX_MUSD_EXTRA_ADDRESS = 0x93A5C724c4992FCBDA6b96F06fa15EB8B5c485b7;
    address internal constant MUSD_EXTRA_ADDRESS = 0xa3BeD4E1c75D00fa6f4E5E6922DB7261B5E9AcD2;
    address internal constant MUSD_EXTRA_PAIR_ADDRESS = 0x663242D053057f317A773D7c262B700616d0b9A0;
    address internal constant CRV_DUSD_ADDRESS = 0x8038C01A0390a8c547446a0b2c18fc9aEFEcc10c;
    address internal constant CRV_DUSD_LP_ADDRESS = 0x3a664Ab939FD8482048609f652f9a0B0677337B9;
    address internal constant CVX_DUSD_REWARDS_ADDRESS = 0x1992b82A8cCFC8f89785129D6403b13925d6226E;
    address internal constant CVX_DUSD_EXTRA_ADDRESS = 0x666F8eEE6FD6839853993977CC86a7A51425673C;
    address internal constant DUSD_EXTRA_ADDRESS = 0x20c36f062a31865bED8a5B1e512D9a1A20AA333A;
    address internal constant DUSD_EXTRA_PAIR_ADDRESS = 0x663242D053057f317A773D7c262B700616d0b9A0;
    address internal constant CRV_RSV_ADDRESS = 0xC18cC39da8b11dA8c3541C598eE022258F9744da;
    address internal constant CRV_RSV_LP_ADDRESS = 0xC2Ee6b0334C261ED60C72f6054450b61B8f18E35;
    address internal constant CVX_RSV_REWARDS_ADDRESS = 0xedfCCF611D7c40F43e77a1340cE2C29EEEC27205;
    address internal constant CRV_FRAX_ADDRESS = 0xd632f22692FaC7611d2AA1C0D552930D43CAEd3B;
    address internal constant CRV_FRAX_LP_ADDRESS = 0xd632f22692FaC7611d2AA1C0D552930D43CAEd3B;
    address internal constant CVX_FRAX_REWARDS_ADDRESS = 0xB900EF131301B307dB5eFcbed9DBb50A3e209B2e;
    address internal constant CRV_MIM_ADDRESS = 0x5a6A4D54456819380173272A5E8E9B9904BdF41B;
    address internal constant CRV_MIM_LP_ADDRESS = 0x5a6A4D54456819380173272A5E8E9B9904BdF41B;
    address internal constant CVX_MIM_REWARDS_ADDRESS = 0xFd5AbF66b003881b88567EB9Ed9c651F14Dc4771;
    address internal constant CVX_MIM_EXTRA_ADDRESS = 0x69a92f1656cd2e193797546cFe2EaF32EACcf6f7;
    address internal constant MIM_EXTRA_ADDRESS = 0x090185f2135308BaD17527004364eBcC2D37e5F6;
    address internal constant MIM_EXTRA_PAIR_ADDRESS = 0xb5De0C3753b6E1B4dBA616Db82767F17513E6d4E;
    address internal constant CRV_UST_WORMHOLE_ADDRESS = 0xCEAF7747579696A2F0bb206a14210e3c9e6fB269;
    address internal constant CRV_UST_WORMHOLE_LP_ADDRESS =
        0xCEAF7747579696A2F0bb206a14210e3c9e6fB269;
    address internal constant CVX_UST_WORMHOLE_REWARDS_ADDRESS =
        0x7e2b9B5244bcFa5108A76D5E7b507CFD5581AD4A;
    address internal constant CRV_D3_ADDRESS = 0xBaaa1F5DbA42C3389bDbc2c9D2dE134F5cD0Dc89;
    address internal constant CRV_D3_LP_ADDRESS = 0xBaaa1F5DbA42C3389bDbc2c9D2dE134F5cD0Dc89;
    address internal constant CVX_D3_REWARDS_ADDRESS = 0x329cb014b562d5d42927cfF0dEdF4c13ab0442EF;
    address internal constant CRV_PUSD_ADDRESS = 0x8EE017541375F6Bcd802ba119bdDC94dad6911A1;
    address internal constant CRV_PUSD_LP_ADDRESS = 0x8EE017541375F6Bcd802ba119bdDC94dad6911A1;
    address internal constant CVX_PUSD_REWARDS_ADDRESS = 0x83a3CE160915675F5bC7cC3CfDA5f4CeBC7B7a5a;
    address internal constant CRV_USDD_ADDRESS = 0xe6b5CC1B4b47305c58392CE3D359B10282FC36Ea;
    address internal constant CRV_USDD_LP_ADDRESS = 0xe6b5CC1B4b47305c58392CE3D359B10282FC36Ea;
    address internal constant CVX_USDD_REWARDS_ADDRESS = 0x7D475cc8A5E0416f0e63042547aDB94ca7045A5b;
    address internal constant CRV_DOLA_ADDRESS = 0xAA5A67c256e27A5d80712c51971408db3370927D;
    address internal constant CRV_DOLA_LP_ADDRESS = 0xAA5A67c256e27A5d80712c51971408db3370927D;
    address internal constant CRV_DOLA_REWARDS_ADDRESS = 0x835f69e58087E5B6bffEf182fe2bf959Fe253c3c;
    address internal constant CRV_FRAX_LUSD_ADDRESS = 0x497CE58F34605B9944E6b15EcafE6b001206fd25;
    address internal constant CRV_FRAX_LUSD_LP_ADDRESS = 0x497CE58F34605B9944E6b15EcafE6b001206fd25;
    address internal constant CVX_FRAX_LUSD_REWARDS_ADDRESS =
        0x053e1dad223A206e6BCa24C77786bb69a10e427d;
    address internal constant CRV_FRAX_ALUSD_ADDRESS = 0xB30dA2376F63De30b42dC055C93fa474F31330A5;
    address internal constant CRV_FRAX_ALUSD_LP_ADDRESS =
        0xB30dA2376F63De30b42dC055C93fa474F31330A5;
    address internal constant CVX_FRAX_ALUSD_REWARDS_ADDRESS =
        0x26598e3E511ADFadefD70ab2C3475Ff741741104;
    address internal constant FRAX_USDC_ADDRESS = 0xDcEF968d416a41Cdac0ED8702fAC8128A64241A2;
    address internal constant FRAX_USDC_LP_ADDRESS = 0x3175Df0976dFA876431C2E9eE6Bc45b65d3473CC;
    address internal constant SDT_MIM_VAULT_ADDRESS = 0x98dd95D0ac5b70B0F4ae5080a1C2EeA8c5c48387;
    address internal constant SDT_MIM_SPELL_ADDRESS = 0x090185f2135308BaD17527004364eBcC2D37e5F6;

    address internal constant CRV_FRAX_XAI_ADDRESS = 0x326290A1B0004eeE78fa6ED4F1d8f4b2523ab669;
    address internal constant CRV_FRAX_XAI_LP_ADDRESS = 0x326290A1B0004eeE78fa6ED4F1d8f4b2523ab669;
    address internal constant CRV_TRICRYPTO2_ADDRESS = 0xD51a44d3FaE010294C616388b506AcdA1bfAAE46;

    address internal constant CRV_FRAX_alUSD_ADDRESS = 0xB30dA2376F63De30b42dC055C93fa474F31330A5;
    address internal constant CRV_FRAX_alUSD_LP_ADDRESS =
        0xB30dA2376F63De30b42dC055C93fa474F31330A5;

    address internal constant ETH_frxETH_ADDRESS = 0xa1F8A6807c402E4A15ef4EBa36528A3FED24E577;
    address internal constant ETH_frxETH_LP_ADDRESS = 0xf43211935C781D5ca1a41d2041F397B8A7366C7A;

    address internal constant CRV_FRAX_stETH_ADDRESS = 0x4d9f9D15101EEC665F77210cB999639f760F831E;
    address internal constant CRV_FRAX_stETH_LP_ADDRESS = 0x4d9f9D15101EEC665F77210cB999639f760F831E;
    address internal constant CVX_FRAX_stETH_REWARDS_ADDRESS = 0xC3D0B8170E105d6476fE407934492930CAc3BDAC;
    uint256 internal constant CVX_FRAX_stETH_PID = 161;

    address internal constant CRV_FRAX_sETH_ADDRESS = 0x663aC72a1c3E1C4186CD3dCb184f216291F4878C;
    address internal constant CRV_FRAX_sETH_LP_ADDRESS = 0x663aC72a1c3E1C4186CD3dCb184f216291F4878C;
    address internal constant CVX_FRAX_sETH_REWARDS_ADDRESS = 0x55cdF6c7E6d04b83835E4702ed395D0263237DA2;
    uint256 internal constant CVX_FRAX_sETH_PID = 167;

    address internal constant CRV_FRAX_alETH_ADDRESS = 0xB657B895B265C38c53FFF00166cF7F6A3C70587d;
    address internal constant CRV_FRAX_alETH_LP_ADDRESS = 0xB657B895B265C38c53FFF00166cF7F6A3C70587d;
    address internal constant CVX_FRAX_alETH_REWARDS_ADDRESS = 0xe0DbbCF08A5465db7c7401C86cce89030e11aB67;
    uint256 internal constant CVX_FRAX_alETH_PID = 166;
}

// File: contracts/interfaces/IZunami.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import './IStrategy.sol';

interface IZunami {
    function totalDeposited() external returns (uint256);

    function deposited(address account) external returns (uint256);

    function totalHoldings() external returns (uint256);

    function calcManagementFee(uint256 amount) external returns (uint256);

    function delegateDeposit(uint256[3] memory amounts) external;

    function delegateWithdrawal(
        uint256 lpShares,
        uint256[3] memory tokenAmounts,
        IStrategy.WithdrawalType withdrawalType,
        uint128 tokenIndex
    ) external;
}

// File: contracts/interfaces/IStrategy.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IStrategy {
    enum WithdrawalType {
        Base,
        OneCoin
    }

    function deposit(uint256[5] memory amounts) external payable returns (uint256);

    function withdraw(
        address withdrawer,
        uint256 userRatioOfCrvLps, // multiplied by 1e18
        uint256[5] memory tokenAmounts,
        WithdrawalType withdrawalType,
        uint128 tokenIndex
    ) external returns (bool);

    function withdrawAll() external;

    function totalHoldings() external view returns (uint256);

    function claimManagementFees() external returns (uint256);

    function autoCompound() external returns (uint256);

    function calcWithdrawOneCoin(uint256 userRatioOfCrvLps, uint128 tokenIndex)
        external
        view
        returns (uint256 tokenAmount);

    function calcSharesAmount(uint256[5] memory tokenAmounts, bool isDeposit)
        external
        view
        returns (uint256 sharesAmount);
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}