Contract Address Details

/**
 * @title LBSKR - (Lite BSKR) Brings of Serenity, Knowledge and Richness
 * @author Ra Murd <pulselorian@gmail.com>
 * @notice website: https://pulselorian.com/
 * @notice telegram: https://t.me/ThePulselorian
 * @notice twitter: https://twitter.com/ThePulseLorian
 *
 * LBSKR is our attempt to develop a better internet currency with negligible fees
 * It's deflationary, burns fees and provides reduced fee to acquire BSKR
 * It has a staking feature to earn bonus while you hold (manual stake)
 *
 * - LBSKR audit
 *      <TODO Audit report link to be added here>
 *
 *
 *    (   (  (  (     (   (( (   .  (   (    (( (   ((
 *    )\  )\ )\ )\    )\ (\())\   . )\  )\   ))\)\  ))\
 *   ((_)((_)(_)(_)  ((_))(_)(_)   ((_)((_)(((_)_()((_)))
 *   | _ \ | | | |  / __| __| |   / _ \| _ \_ _|   \ \| |
 *   |  _/ |_| | |__\__ \ _|| |__| (_) |   /| || - | .  |
 *   |_|  \___/|____|___/___|____|\___/|_|_\___|_|_|_|\_|
 *
 * Tokenomics:
 *
 * Burn             0.1%      50%
 * Growth           0.1%      50%
 */

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

import "./imports/BaseBSKR_V2.sol";
import "./imports/IBSKR.sol";
import "./imports/Stakable.sol";
import "./lib/DSMath.sol";
import "./oz_upgradable/security/ReentrancyGuardUpgradeable.sol";

contract LBSKR_V2 is BaseBSKR_V2, DSMath, Stakable, ReentrancyGuardUpgradeable {
    enum Field {
        tTransferAmount,
        tBurnFee,
        tGrowthFee
    }

    IBSKR private _BSKR;
    address private _inflationAddress;
    bool private _initialRatioFlag;
    uint256 private _burnFee; // 0.1% burn fee 4 bits
    uint256 private _growthFee; // 0.05% * 2 growth fee 4 bits
    uint256 private _lastDistTS; // 34 bits
    uint256 private constant _INF_RATE_HRLY =
        999_992_000_000_000_000_000_000_000; // ray (10E27 precision) value for 0.999992 (1 - 0.0008%) 90 bits
    uint256 private constant _SECS_IN_AN_HOUR = 3600; // 12 bits

    event FeeTransfers(uint256 Burnt, uint256 Growth);

    /**
     * @notice Reinitializes LBSKR contract with new implementation version
     * @param version Implementation version
     * @param nameA Token name
     * @param symbolA Token symbol
     * @param growth1AddressA Growth address 1
     * @param growth2AddressA Growth address 2
     * @param inflationAddressA Inflation vault address
     * @param sisterOAsA Sister OA addresses
     */
    function __LBSKR_V2_init(
        uint8 version,
        string calldata nameA,
        string calldata symbolA,
        address growth1AddressA,
        address growth2AddressA,
        address inflationAddressA,
        address[5] memory sisterOAsA
    ) external reinitializer(version) {
        // __Ownable_init_unchained();
        // __Pausable_init_unchained();
        // __Manageable_init_unchained();
        // __BaseBSKR_V2_init_unchained(
        //     nameA,
        //     symbolA,
        //     growth1AddressA,
        //     growth2AddressA,
        //     sisterOAsA
        // );
        // __Stakable_init_unchained();
        // __ReentrancyGuard_init_unchained();
        // __LBSKR_V2_init_unchained(inflationAddressA);
    }

    function __LBSKR_V2_init_unchained(
        address inflationAddressA
    ) internal onlyInitializing {
        // _burnFee = 10; // 0.1% burn fee
        // _growthFee = 5; // 0.05% * 2 growth fee
        // _inflationAddress = inflationAddressA;
        // uint256 halfSupply = _totalSupply >> 1; // divide by 2
        // _balances[_msgSender()] = halfSupply;
        // _balances[_inflationAddress] = halfSupply;
        // address _ammLBSKRPair = _dexFactoryV2.createPair(
        //     address(this),
        //     wethAddr
        // );
        // _approve(_ammLBSKRPair, _ammLBSKRPair, type(uint256).max);
        // _isAMMPair[_ammLBSKRPair] = true;
        // for (uint256 index = 0; index < _sisterOAs.length; ++index) {
        //     _paysNoFee[_sisterOAs[index]] = true;
        // }
        // emit Transfer(address(0), _msgSender(), halfSupply);
        // emit Transfer(address(0), _inflationAddress, halfSupply);
    }

    function _airdropTokens(address to, uint256 amount) internal override {
        _transferTokens(owner(), to, amount, false);
    }

    function _calcInflation(
        uint256 nowTS
    ) private view returns (uint256 inflation) {
        require(_lastDistTS != 0, "L: Inflation not started!");
        // Always count seconds at beginning of the hour
        uint256 hoursElapsed = uint256(
            (nowTS - _lastDistTS) / _SECS_IN_AN_HOUR
        );

        uint256 currBal = _balances[_inflationAddress];
        // inflation = 0;
        if (hoursElapsed != 0) {
            uint256 infFracRay = rpow(_INF_RATE_HRLY, hoursElapsed);
            inflation = currBal - (currBal * infFracRay) / RAY;
        }

        return inflation;
    }

    function _creditInflation() private {
        // Always count seconds at beginning of the hour
        uint256 nowTS = block.timestamp - (block.timestamp % _SECS_IN_AN_HOUR);
        if (nowTS > _lastDistTS) {
            uint256 inflation = _calcInflation(nowTS);

            if (inflation != 0) {
                _lastDistTS = nowTS;
                _balances[_inflationAddress] -= inflation;
                _balances[address(this)] += inflation;
            }
        }
    }

    function _swapTokensForTokens(
        address owner,
        uint256 tokenAmount
    ) private returns (uint256 bskrAmount) {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = address(_BSKR);

        // _approve(owner, owner, tokenAmount); // allow owner to spend his/her tokens TODO - can we do away with this statement
        _approve(owner, address(_dexRouterV2), tokenAmount); // allow router to spend owner's tokens

        uint256 balInfAddrBefore = _BSKR.balanceOf(_inflationAddress);

        // uint256[] memory amounts = _dexRouterV2.getAmountsOut(tokenAmount, path);

        // make the swap
        _dexRouterV2.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH // TODO - tighten this
            path,
            _inflationAddress,
            block.timestamp + 15
        );

        // There is no good way to discount the Rfi received as part of this swap
        // It will be small fraction and proportional to amount staked, so can be ignored
        return _BSKR.balanceOf(_inflationAddress) - balInfAddrBefore;
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "L: From 0 addr");
        require(to != address(0), "L: To 0 addr");
        require(amount != 0, "L: 0 amount");

        if (!isV3Enabled) {
            require(!v3PairInvolved(from, to), "L: UniswapV3 not supported!");
        }

        _checkIfAMMPair(from);
        _checkIfAMMPair(to);

        //indicates if fee should be deducted from transfer
        bool takeFee = true;

        //if any wallet belongs to _paysNoFee wallet then remove the fee
        if (_paysNoFee[from] || _paysNoFee[to]) {
            takeFee = false;
        }

        if (!_isAMMPair[from] && !_isAMMPair[to]) {
            // simple transfer not buy/sell, take no fees
            takeFee = false;
        }

        //transfer amount, it will take tax, burn fee
        _transferTokens(from, to, amount, takeFee);
    }

    function _transferTokens(
        address sender,
        address recipient,
        uint256 tAmount,
        bool takeFee
    ) private whenNotPaused {
        uint256[3] memory response;

        if (!takeFee) {
            response[uint256(Field.tTransferAmount)] = tAmount;
        } else {
            response[uint256(Field.tBurnFee)] = (tAmount * _burnFee) / _BIPS;
            response[uint256(Field.tGrowthFee)] =
                (tAmount * _growthFee) /
                _BIPS;
            response[uint256(Field.tTransferAmount)] =
                tAmount -
                response[uint256(Field.tBurnFee)] -
                (2 * response[uint256(Field.tGrowthFee)]);
        }

        _balances[sender] -= tAmount;
        _balances[recipient] += response[uint256(Field.tTransferAmount)];

        if (response[uint256(Field.tBurnFee)] != 0) {
            _balances[address(0)] += response[uint256(Field.tBurnFee)];
            // emit Transfer(
            //     sender,
            //     address(0),
            //     response[uint256(Field.tBurnFee)]
            // );
            // }

            // if (response[uint256(Field.tGrowthFee)] != 0) {
            _balances[_growth1Address] += response[uint256(Field.tGrowthFee)];
            // emit Transfer(
            //     sender,
            //     _growth1Address,
            //     response[uint256(Field.tGrowthFee)]
            // );

            _balances[_growth2Address] += response[uint256(Field.tGrowthFee)];
            // emit Transfer(
            //     sender,
            //     _growth2Address,
            //     response[uint256(Field.tGrowthFee)]
            // );

            emit FeeTransfers(
                response[uint256(Field.tBurnFee)],
                response[uint256(Field.tBurnFee)]
            );
        }

        emit Transfer(
            sender,
            recipient,
            response[uint256(Field.tTransferAmount)]
        );
    }

    function _unstakeInternal(
        uint256 unstakeAmount,
        uint256 bskrAmount2Deduct,
        uint256 lbskrShares2Deduct,
        uint256 bskrShares2Deduct,
        uint256 stakeSince
    ) internal {
        uint256 eligibleBasis = _BIPS -
            _penaltyFor(stakeSince, block.timestamp);

        uint256 lbskrToSend;
        if (balanceOf(address(this)) != 0) {
            // stakeAmount never existed - it's notional
            uint256 lbskrBal = (((balanceOf(address(this)) + totalLBSKRStakes) *
                lbskrShares2Deduct) / totalLBSKRShares);

            if (lbskrBal > unstakeAmount) {
                lbskrToSend =
                    ((lbskrBal - unstakeAmount) * eligibleBasis) /
                    _BIPS;

                if (lbskrToSend != 0) {
                    _balances[address(this)] -= lbskrToSend;
                    _balances[_msgSender()] += lbskrToSend;
                    emit Transfer(address(this), _msgSender(), lbskrToSend);
                }

                if (eligibleBasis < _BIPS) {
                    uint256 lbskrToBurn = ((lbskrBal - unstakeAmount) *
                        (_BIPS - eligibleBasis)) / _BIPS;

                    if (lbskrToBurn != 0) {
                        _balances[address(this)] -= lbskrToBurn;
                        _balances[address(0)] += lbskrToBurn;

                        emit Transfer(address(this), address(0), lbskrToBurn);
                    }
                }
            }
        }

        uint256 bskrToSend = 0;
        if (_BSKR.balanceOf(_inflationAddress) != 0) {
            bskrToSend = (bskrAmount2Deduct * eligibleBasis) / _BIPS;

            if (bskrToSend != 0) {
                require(
                    _BSKR.stakeTransfer(
                        _inflationAddress,
                        _msgSender(),
                        bskrToSend
                    ),
                    "L: BSKR transfer failed"
                );
            }

            if (eligibleBasis < _BIPS) {
                uint256 bskrToBurn = (bskrAmount2Deduct *
                    (_BIPS - eligibleBasis)) / _BIPS;

                if (bskrToBurn != 0) {
                    require(
                        _BSKR.stakeTransfer(
                            _inflationAddress,
                            address(0),
                            bskrToBurn
                        ),
                        "L: BSKR burn failed"
                    );
                }
            }
        }

        totalLBSKRStakes -= unstakeAmount;
        totalBSKRStakes -= bskrAmount2Deduct;
        totalLBSKRShares -= lbskrShares2Deduct;
        totalBSKRShares -= bskrShares2Deduct;

        emit Unstaked(
            _msgSender(),
            unstakeAmount,
            bskrAmount2Deduct,
            lbskrShares2Deduct,
            bskrShares2Deduct,
            stakeSince,
            block.timestamp
        );
    }

    /**
     * @notice Get the token balance
     * @param wallet user address
     * @return uint256 user's token balance
     */
    function balanceOf(address wallet) public view override returns (uint256) {
        return _balances[wallet];
    }

    /**
     * @notice Returns the registered BSKR contract address
     * @return address Registered BSKR address
     */
    function getBSKRAddress() external view returns (address) {
        return address(_BSKR);
    }

    /**
     * @notice Calculates penalty amount for given stake if unstaked now
     * @param wallet User address
     * @param stakeIndex Index of stake array
     * @return penaltyBasis Basis point of applicable penalty
     */
    function penaltyIfUnstakedNow(
        address wallet,
        uint256 stakeIndex
    ) external view returns (uint256 penaltyBasis) {
        uint256 stakerIndex = _stakeIndexMap[wallet];
        Stake memory currStake = _getCurrStake(stakerIndex, stakeIndex);

        return _penaltyFor(currStake.since, block.timestamp);
    }

    /**
     * @notice Calculates rewards for a stakeholder
     * @param stakeholder User address
     * @param stakeIndex Index of stake array
     * @return lbskrRewards LBSKR rewards
     * @return bskrRewards BSKR rewards
     * @return eligibleBasis Basis points after penalty
     */
    function rewardsOf(
        address stakeholder,
        uint256 stakeIndex
    )
        external
        view
        returns (
            uint256 lbskrRewards,
            uint256 bskrRewards,
            uint256 eligibleBasis
        )
    {
        uint256 inflation;
        if (_lastDistTS != 0) {
            inflation = _calcInflation(block.timestamp);
        }

        uint256 stakerIndex = _stakeIndexMap[stakeholder];

        Stake memory currStake = _getCurrStake(stakerIndex, stakeIndex);

        eligibleBasis = _BIPS - _penaltyFor(currStake.since, block.timestamp);

        if ((balanceOf(address(this)) + inflation) != 0) {
            uint256 lbskrBal = (((balanceOf(address(this)) +
                inflation +
                totalLBSKRStakes) * currStake.sharesLBSKR) / totalLBSKRShares); // LBSKR notional balance

            if (lbskrBal > currStake.amountLBSKR) {
                lbskrRewards =
                    ((lbskrBal - currStake.amountLBSKR) * eligibleBasis) /
                    _BIPS;
            }
        }

        if (_BSKR.balanceOf(_inflationAddress) != 0) {
            uint256 bskrBal = ((_BSKR.balanceOf(_inflationAddress) *
                currStake.sharesBSKR) / totalBSKRShares);

            if (bskrBal > currStake.amountBSKR) {
                bskrRewards =
                    ((bskrBal - currStake.amountBSKR) * eligibleBasis) /
                    _BIPS;
            }
        }

        return (lbskrRewards, bskrRewards, eligibleBasis);
    }

    /**
     * @notice Set's the initial shares to stakes ratio and initializes
     * wallet (owner) needs LBSKR allowance for itself (spender)
     * Also, sets the BSKR contract address
     * @param newBSKRAddr BSKR contract address
     */
    function setInitialRatio(address newBSKRAddr) external onlyOwner {
        require(!_initialRatioFlag, "L: Initial ratio set");
        require(
            totalLBSKRShares == 0 && balanceOf(address(this)) == 0,
            "L: Non-zero balance"
        );

        _BSKR = IBSKR(newBSKRAddr);
        address _ammBSKRPair = _dexFactoryV2.getPair(
            address(this),
            newBSKRAddr
        );

        if (_ammBSKRPair == address(0)) {
            _ammBSKRPair = _dexFactoryV2.createPair(address(this), newBSKRAddr);
        }

        if (_ammBSKRPair != address(0)) {
            _approve(_ammBSKRPair, _ammBSKRPair, type(uint256).max);
            _isAMMPair[_ammBSKRPair] = true;
        }

        uint256 amountLBSKR = 1000000000000000000;
        _balances[_msgSender()] -= amountLBSKR;
        _balances[address(this)] += amountLBSKR;
        _BSKR.stakeTransfer(_msgSender(), _inflationAddress, amountLBSKR);

        _stake(amountLBSKR, amountLBSKR, amountLBSKR, amountLBSKR); // For the first stake, the number of shares is the same as the amount

        _initialRatioFlag = true;

        _lastDistTS = block.timestamp - (block.timestamp % _SECS_IN_AN_HOUR);
    }

    /**
     * @notice Create a new stake
     * wallet (owner) needs LBSKR allowance for itself (spender)
     * also maybe LBSKR (spender) needs LSBKR allowance for wallet (owner)
     * @param amountLBSKR Amount of LBSKR to stake
     */
    function stake(uint256 amountLBSKR) external whenNotPaused nonReentrant {
        require(amountLBSKR != 0, "L: Cannot stake nothing");
        require(_balances[_msgSender()] >= amountLBSKR, "L: Too much staking");

        _creditInflation();

        // NAV value -> (totalLBSKRStakes + balanceOf(address(this))) / totalLBSKRShares
        // Divide the amountLBSKR by NAV

        uint256 sharesLBSKR = (amountLBSKR * totalLBSKRShares) /
            (totalLBSKRStakes + balanceOf(address(this)));

        _balances[_msgSender()] -= amountLBSKR;

        _balances[address(this)] += amountLBSKR;

        uint256 bskrBalBeforeSwap = _BSKR.balanceOf(_inflationAddress);
        uint256 amountBSKR = _swapTokensForTokens(address(this), amountLBSKR);
        uint256 sharesBSKR = (amountBSKR * totalBSKRShares) / bskrBalBeforeSwap;

        _stake(amountLBSKR, amountBSKR, sharesLBSKR, sharesBSKR);
    }

    /**
     * @notice Removes an existing stake (unstake)
     * @param unstakeAmount Amount to unstake
     * @param stakeIndex Index of stake array
     */
    function unstake(
        uint256 unstakeAmount,
        uint256 stakeIndex
    ) external nonReentrant whenNotPaused {
        _creditInflation();

        (
            Stake memory currStake,
            uint256 lbskrShares2Deduct,
            uint256 bskrShares2Deduct,
            uint256 bskrAmount2Deduct
        ) = _withdrawStake(stakeIndex, unstakeAmount);

        _unstakeInternal(
            unstakeAmount,
            bskrAmount2Deduct,
            lbskrShares2Deduct,
            bskrShares2Deduct,
            currStake.since
        );
    }

    /**
     * @notice This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
        

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

import "../lib/Utils.sol";
import "../oz_upgradable/access/OwnableUpgradeable.sol";
import "../oz_upgradable/proxy/utils/UUPSUpgradeable.sol";
import "../oz_upgradable/security/PausableUpgradeable.sol";
import "../oz_upgradable/token/ERC20/IERC20Upgradeable.sol";
import "../uniswap/v2-core/interfaces/IUniswapV2Factory.sol";
import "../uniswap/v2-core/interfaces/IUniswapV2Pair.sol";
import "../uniswap/v2-periphery/interfaces/IUniswapV2Router02.sol";
import "../uniswap/v3-core/interfaces/IUniswapV3Factory.sol";
import "../uniswap/v3-core/interfaces/IUniswapV3Pool.sol";
import "./Manageable.sol";

abstract contract BaseBSKR_V2 is
    Utils,
    OwnableUpgradeable,
    UUPSUpgradeable,
    PausableUpgradeable,
    IERC20Upgradeable,
    Manageable
{
    struct Airdrop {
        address user;
        uint256 amount;
    }

    IUniswapV2Factory internal _dexFactoryV2;
    IUniswapV2Router02 internal _dexRouterV2;
    address internal _growth1Address;
    address internal _growth2Address;
    // address internal _nftStakingContract;
    address internal wethAddr;
    address[5] internal _sisterOAs;
    bool internal isV3Enabled;
    mapping(address => bool) internal _isAMMPair;
    mapping(address => bool) internal _paysNoFee;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => uint256) internal _balances;
    string private _name;
    string private _symbol;
    uint256 internal _oaIndex; // 5 bits
    uint256 internal _totalSupply; // 1 billion for Goerli and 1 trillion (0xC9F2C9CD04674EDEA40000000) for PulseChain - 40 bits
    uint256 internal constant _BIPS = 10000; // bips or basis point divisor - 14 bits
    uint256 private constant _DECIMALS = 18; // 5 bits

    function __BaseBSKR_V2_init(
        uint8 version,
        string calldata, // nameA,
        string calldata, // symbolA,
        address, // growth1AddressA,
        address, // growth2AddressA,
        address[5] memory // sisterOAsA
    ) internal reinitializer(version) {
        // __Ownable_init_unchained();
        // __Pausable_init_unchained();
        // __Manageable_init_unchained();
        // __BaseBSKR_V2_init_unchained(
        //     nameA,
        //     symbolA,
        //     growth1AddressA,
        //     growth2AddressA,
        //     sisterOAsA
        // );
    }

    function __BaseBSKR_V2_init_unchained(
        string calldata nameA,
        string calldata symbolA,
        address growth1AddressA,
        address growth2AddressA,
        address[5] memory sisterOAsA
    ) internal onlyInitializing {
        _name = nameA;
        _symbol = symbolA;
        _growth1Address = growth1AddressA;
        _growth2Address = growth2AddressA;
        _sisterOAs = sisterOAsA;

        // if (block.chainid == 941 || block.chainid == 942) {
            // PLS Testnet V2B
            _totalSupply = 1_000_000_000_000_000_000_000_000_000_000;

            _dexRouterV2 = IUniswapV2Router02(
                0xb242aA8A863CfcE9fcBa2b9a6B00b4cd62343f27
            );
        // } else if (block.chainid == 11155111) {
        //     // Sepolia
        //     _totalSupply = 1_000_000_000_000_000_000_000_000_000;

        //     _dexRouterV2 = IUniswapV2Router02(
        //         0x01a93b7153Ee160F3176af0B0F31121DF9f0FFA5
        //     );
        // } else {
        //     // 1, 5, 31337
        //     _totalSupply = 1_000_000_000_000_000_000_000_000_000;

        //     _dexRouterV2 = IUniswapV2Router02(
        //         0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        //     );
        // }

        _dexFactoryV2 = IUniswapV2Factory(_dexRouterV2.factory());

        // if (block.chainid == 941 || block.chainid == 942) {
            wethAddr = _dexRouterV2.WPLS();
        // } else {
        //     wethAddr = _dexRouterV2.WETH();
        // }

        _paysNoFee[_msgSender()] = true;
        _paysNoFee[address(this)] = true;
        _paysNoFee[address(_dexRouterV2)] = true; // may not be needed
    }

    //to recieve ETH from _dexRouterV2 when swaping
    receive() external payable {}

    fallback() external payable {}

    function __v3PairInvolved(address target) internal view returns (bool) {
        if (target == address(_dexRouterV2)) return false; // to avoid orange reverts
        // if (target == address(_nftStakingContract)) return false; // to avoid orange reverts
        if (target == wethAddr) return false; // to avoid orange reverts
        if (_isAMMPair[target]) {
            return false; // if V3 is disabled, only V2 pairs are registered
        }

        address token0 = _getToken0(target);
        if (token0 == address(0)) {
            return false;
        }

        address token1 = _getToken1(target);
        if (token1 == address(0)) {
            return false;
        }

        uint24 fee = _getFee(target);
        if (fee != 0) {
            return true;
        }

        return false;
    }

    function _airdropTokens(address to, uint256 amount) internal virtual;

    /**
     * @notice Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "BB: From 0 addr");
        require(spender != address(0), "BB: To 0 addr");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _authorizeUpgrade(address) internal override onlyOwner {}

    function _checkIfAMMPair(address target) internal {
        if (target.code.length == 0) return;
        if (target == address(_dexRouterV2)) return; // to avoid orange reverts
        // if (target == address(_nftStakingContract)) return; // to avoid orange reverts
        if (target == wethAddr) return; // to avoid orange reverts
        if (!_isAMMPair[target]) {
            address token0 = _getToken0(target);
            if (token0 == address(0)) {
                return;
            }

            address token1 = _getToken1(target);
            if (token1 == address(0)) {
                return;
            }

            _approve(target, target, type(uint256).max);
            _isAMMPair[target] = true;
        }
    }

    function _getOriginAddress() internal returns (address) {
        if (_oaIndex < (_sisterOAs.length - 1)) {
            _oaIndex = _oaIndex + 1;
        } else {
            _oaIndex = 0;
        }
        return _sisterOAs[_oaIndex];
    }

    function _transfer(
        address owner,
        address to,
        uint256 amount
    ) internal virtual;

    /**
     * Airdrop BSKR to sacrificers, deducted from owner's wallet
     */
    function airdrop(Airdrop[] calldata receivers) external onlyOwner {
        for (uint256 index; index < receivers.length; ++index) {
            if (
                receivers[index].user != address(0) &&
                receivers[index].amount != 0
            ) {
                _airdropTokens(receivers[index].user, receivers[index].amount);
            }
        }
    }

    /**
     * @notice Get allowance for a spender to spend owner's tokens
     * @param owner owner address
     * @param spender spender address
     * @return uint256 allowance value
     */
    function allowance(
        address owner,
        address spender
    ) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @notice Sets allowance for spender to use msgsender's tokens
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(
        address spender,
        uint256 amount
    ) external override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @notice Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     */
    function decimals() external pure returns (uint256) {
        return _DECIMALS;
    }

    /**
     * @notice Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) external returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "BSKR: Decreases below 0");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @notice Disables UniswapV3
     */
    function disableUniswapV3() external onlyManager {
        isV3Enabled = false;
    }

    /**
     * @notice Enables UniswapV3
     */
    function enableUniswapV3() external onlyManager {
        isV3Enabled = true;
    }

    /**
     * @notice Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) external returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @notice Returns the name of the token.
     */
    function name() external view returns (string memory) {
        return _name;
    }

    /**
     * @notice Pauses this contract features
     */
    function pauseContract() external onlyManager {
        _pause();
    }

    // /*
    //  * @notice Sets the BSKR contract address
    //  */
    // function setNFTStakingContract(address newNFTStkCntrct) external onlyOwner {
    //     _nftStakingContract = newNFTStkCntrct;
    // }

    /**
     * @notice Returns the symbol of the token
     */
    function symbol() external view returns (string memory) {
        return _symbol;
    }

    /**
     * @notice Returns the amount of tokens in existence.
     */
    function totalSupply() external view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @notice See {IERC20-transfer}.    TODO add description
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(
        address to,
        uint256 amount
    ) external override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @notice Transfers tokens 'from' to 'to' address provided there is enough allowance
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external override returns (bool) {
        address spender = _msgSender();
        uint256 currentAllowance = allowance(from, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "BB: Insufficient allowance");
            unchecked {
                _approve(from, spender, currentAllowance - amount);
            }
        }
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @notice Unpauses the contract's features
     */
    function unPauseContract() external onlyManager {
        _unpause();
    }

    // to rename with _ prefix
    function v3PairInvolved(
        address from,
        address to
    ) internal view returns (bool) {
        return (__v3PairInvolved(from) || __v3PairInvolved(to));
    }

    /**
     * @notice This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

/**
 * @notice Interface of BSKR.
 */
interface IBSKR {
    function balanceOf(address wallet) external view returns (uint256);

    function stakeTransfer(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);

    function transfer(address to, uint256 amount) external returns (bool);
}
          

/*
 * SPDX-License-Identifier: MIT
 */
pragma solidity ^0.8.19;

import "../oz_upgradable/utils/ContextUpgradeable.sol";

abstract contract Manageable is ContextUpgradeable {
    address private _manager;

    event ManagementTransferred(
        address indexed previousManager,
        address indexed newManager
    );

    function __Manageable_init() internal onlyInitializing {
        __Manageable_init_unchained();
    }

    function __Manageable_init_unchained() internal onlyInitializing {
        _manager = _msgSender();
        emit ManagementTransferred(address(0), _msgSender());
    }

    function _checkManager() private view {
        require(_manager == _msgSender(), "M: Caller not manager");
    }

    function manager() external view returns (address) {
        return _manager;
    }

    modifier onlyManager() {
        _checkManager();
        _;
    }

    /**
     * @notice Transfers the management of the contract to a new manager
     */
    function transferManagement(address newManager) external onlyManager {
        emit ManagementTransferred(_manager, newManager);
        _manager = newManager;
    }
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

import "../oz_upgradable/utils/ContextUpgradeable.sol";
import "../oz_upgradable/proxy/utils/Initializable.sol";

contract Stakable is Initializable, ContextUpgradeable {
    struct Stake {
        uint256 amountLBSKR;
        uint256 amountBSKR;
        uint256 sharesLBSKR;
        uint256 sharesBSKR;
        uint256 since;
    }

    struct Stakeholder {
        address user;
        Stake[] userStakes;
    }

    Stakeholder[] public stakeholders;
    mapping(address => uint256) internal _stakeIndexMap;
    uint256 public totalBSKRShares;
    uint256 public totalBSKRStakes;
    uint256 public totalLBSKRShares;
    uint256 public totalLBSKRStakes;

    /**
     * @notice Staked event is triggered whenever a user stakes tokens, address is indexed to make it filterable
     */
    event Staked(
        address indexed user,
        uint256 amountLBSKR,
        uint256 amountBSKR,
        uint256 sharesLBSKR,
        uint256 sharesBSKR,
        uint256 stakeIndex,
        uint256 since
    );

    /**
     * @notice Unstaked event is triggered whenever a user unstakes tokens, address is indexed to make it filterable
     */
    event Unstaked(
        address indexed user,
        uint256 amountLBSKR,
        uint256 amountBSKR,
        uint256 sharesLBSKR,
        uint256 sharesBSKR,
        uint256 since,
        uint256 till
    );

    function __Stakable_init() internal onlyInitializing {
        __Stakable_init_unchained();
    }

    function __Stakable_init_unchained() internal onlyInitializing {
        // This push is needed so we avoid index 0 causing bug of index-1

        if (stakeholders.length == 0) {
            stakeholders.push();
        }
    }

    /**
     * @notice _addStakeholder takes care of adding a stakeholder to the stakeholders array
     */
    function _addStakeholder(address staker) internal returns (uint256) {
        // Push a empty item to the Array to make space for our new stakeholder
        stakeholders.push();
        // Calculate the index of the last item in the array by Len-1
        uint256 stakerIndex = stakeholders.length - 1;
        // Assign the address to the new index
        stakeholders[stakerIndex].user = staker;
        // Add index to the stakeholders
        _stakeIndexMap[staker] = stakerIndex;
        return stakerIndex;
    }

    function _getCurrStake(
        uint256 stakerIndex,
        uint256 stakeIndex
    ) internal view returns (Stake memory currStake) {
        require(
            stakeIndex < stakeholders[stakerIndex].userStakes.length,
            "S: Stake index incorrect!"
        );

        currStake = stakeholders[stakerIndex].userStakes[stakeIndex];

        return currStake;
    }

    function _stake(
        uint256 amountLBSKR,
        uint256 amountBSKR,
        uint256 sharesLBSKR,
        uint256 sharesBSKR
    ) internal {
        // Simple check so that user does not stake 0
        require(amountLBSKR != 0, "S: Cannot stake nothing");

        // Mappings in solidity creates all values, but empty, so we can just check the address
        uint256 stakerIndex = _stakeIndexMap[_msgSender()];
        uint256 since = block.timestamp;

        // See if the staker already has a staked index or if its the first time
        if (stakerIndex == 0) {
            // This stakeholder stakes for the first time
            // We need to add him to the stakeholders and also map it into the Index of the stakes
            // The index returned will be the index of the stakeholder in the stakeholders array
            stakerIndex = _addStakeholder(_msgSender());
        }

        // Use the index to push a new Stake
        // push a newly created Stake with the current block timestamp.
        stakeholders[stakerIndex].userStakes.push(
            Stake(amountLBSKR, amountBSKR, sharesLBSKR, sharesBSKR, since)
        );

        totalLBSKRStakes += amountLBSKR;
        totalBSKRStakes += amountBSKR;
        totalLBSKRShares += sharesLBSKR;
        totalBSKRShares += sharesBSKR;

        // Emit an event that the stake has occured
        emit Staked(
            _msgSender(),
            amountLBSKR,
            amountBSKR,
            sharesLBSKR,
            sharesBSKR,
            stakeholders[stakerIndex].userStakes.length - 1,
            since
        );
    }

    function _withdrawStake(
        uint256 stakeIndex,
        uint256 unstakeAmount
    )
        internal
        returns (
            Stake memory currStake,
            uint256 lbskrShares2Deduct,
            uint256 bskrShares2Deduct,
            uint256 bskrAmount2Deduct
        )
    {
        uint256 stakerIndex = _stakeIndexMap[_msgSender()];
        currStake = _getCurrStake(stakerIndex, stakeIndex);

        require(
            stakerIndex != 1 || stakeIndex != 0,
            "S: Cannot remove the first stake"
        );

        require(
            currStake.amountLBSKR >= unstakeAmount,
            "S: Cannot withdraw more than you have staked"
        );

        // Remove by subtracting the money unstaked
        // Same fraction of shares to be deducted from both BSKR and LBSKR
        lbskrShares2Deduct =
            (unstakeAmount * currStake.sharesLBSKR) /
            currStake.amountLBSKR;
        bskrAmount2Deduct =
            (unstakeAmount * currStake.amountBSKR) /
            currStake.amountLBSKR;
        bskrShares2Deduct =
            (unstakeAmount * currStake.sharesBSKR) /
            currStake.amountLBSKR;

        if (currStake.amountLBSKR == unstakeAmount) {
            if (stakeIndex < stakeholders[stakerIndex].userStakes.length - 1) {
                stakeholders[stakerIndex].userStakes[stakeIndex] = stakeholders[
                    stakerIndex
                ].userStakes[stakeholders[stakerIndex].userStakes.length - 1];
            }
            stakeholders[stakerIndex].userStakes.pop();

            if (stakeholders[stakerIndex].userStakes.length == 0) {
                stakeholders[stakerIndex] = stakeholders[
                    stakeholders.length - 1
                ];
                stakeholders.pop();

                _stakeIndexMap[_msgSender()] = 0;
                _stakeIndexMap[stakeholders[stakerIndex].user] = stakerIndex;
            }
        } else {
            Stake storage updatedStake = stakeholders[stakerIndex].userStakes[
                stakeIndex
            ];
            updatedStake.amountLBSKR -= unstakeAmount;
            updatedStake.amountBSKR -= bskrAmount2Deduct;
            updatedStake.sharesLBSKR -= lbskrShares2Deduct;
            updatedStake.sharesBSKR -= bskrShares2Deduct;
        }

        return (
            currStake,
            lbskrShares2Deduct,
            bskrShares2Deduct,
            bskrAmount2Deduct
        );
    }

    /**
     * @notice Returns the total number of stake holders
     */
    function getTotalStakeholders() external view returns (uint256) {
        return stakeholders.length - 1;
    }

    /**
     * @notice A method to the aggregated stakes from all stakeholders.
     * @return __totalStakes The aggregated stakes from all stakeholders.
     */
    function getTotalStakes() external view returns (uint256 __totalStakes) {
        // uint256 __totalStakes;
        for (
            uint256 stakerIndex;
            stakerIndex < stakeholders.length;
            ++stakerIndex
        ) {
            __totalStakes =
                __totalStakes +
                stakeholders[stakerIndex].userStakes.length;
        }

        return __totalStakes;
    }

    /**
     * @notice Returns the stakes of a stakeholder
     */
    function stakesOf(
        address stakeholder
    ) external view returns (Stake[] memory userStakes) {
        uint256 stakerIndex = _stakeIndexMap[stakeholder];
        if (stakerIndex > 0) {
            return stakeholders[stakerIndex].userStakes;
        }

        return userStakes;
    }

    /**
     * @notice This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
          

/*
 * SPDX-License-Identifier: MIT
 */

/// math.sol -- mixin for inline numerical wizardry

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.19;

contract DSMath {
    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x + y) >= x, "ds-math-add-overflow");
    }

    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
    }

    uint256 constant RAY = 10 ** 27;

    //rounds to zero if x*y < WAD / 2
    function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = add(mul(x, y), RAY >> 1) / RAY; // 'RAY >> 1' divides by 2
    }

    function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) {
        z = n % 2 != 0 ? x : RAY;

        for (n /= 2; n != 0; n /= 2) {
            x = rmul(x, x);

            if (n % 2 != 0) {
                z = rmul(z, x);
            }
        }
    }
}
          

/*
 * SPDX-License-Identifier: MIT
 */
pragma solidity ^0.8.19;

contract Utils {
    uint24 private constant _SECS_IN_FOUR_WEEKS = 2419200; // 3600 * 24 * 7 * 4

    function _callAndParseAddressReturn(
        address token,
        bytes4 selector
    ) internal view returns (address) {
        (bool success, bytes memory data) = token.staticcall(
            abi.encodeWithSelector(selector)
        );

        // if not implemented, or returns empty data, return empty string
        if (!success || data.length == 0) {
            return address(0);
        }

        // if implemented, or returns data, return decoded int24 else return 0
        if (data.length == 32) {
            return abi.decode(data, (address));
        }

        return address(0);
    }

    function _callAndParseUint24Return(
        address token,
        bytes4 selector
    ) internal view returns (uint24) {
        (bool success, bytes memory data) = token.staticcall(
            abi.encodeWithSelector(selector)
        );

        // if not implemented, or returns empty data, return empty string
        if (!success || data.length == 0) {
            return 0;
        }

        // if implemented, or returns data, return decoded int24 else return 0
        if (data.length == 32) {
            return abi.decode(data, (uint24));
        }

        return 0;
    }

    function _getFee(address target) internal view returns (uint24 targetFee) {
        targetFee = _callAndParseUint24Return(
            target,
            hex"ddca3f43" // fee()
        );

        return targetFee;
    }

    function _getToken0(
        address target
    ) internal view returns (address targetToken0) {
        targetToken0 = _callAndParseAddressReturn(
            target,
            hex"0dfe1681" // token0()
        );

        return targetToken0;
    }

    function _getToken1(
        address target
    ) internal view returns (address targetToken1) {
        targetToken1 = _callAndParseAddressReturn(
            target,
            hex"d21220a7" // token1()
        );

        return targetToken1;
    }

    /**
     * @notice Calculates penalty basis points for given from and to timestamps in seconds since epoch
     */
    function _penaltyFor(
        uint256 fromTimestamp,
        uint256 toTimestamp
    ) internal pure returns (uint256 penaltyBasis) {
        // penaltyBasis = 0;
        if (fromTimestamp + 52 weeks > toTimestamp) {
            uint256 fourWeeksElapsed = (toTimestamp - fromTimestamp) /
                _SECS_IN_FOUR_WEEKS;
            if (fourWeeksElapsed < 13) {
                penaltyBasis = ((13 - fourWeeksElapsed) * 100); // If one four weeks have elapsed - penalty is 12% or 1200/10000
            }
        }
        return penaltyBasis;
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.9._
 */
interface IERC1967Upgradeable {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) private returns (bytes memory) {
        require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     * ====
     *
     * [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://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (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 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);
        }
    }
}
          

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);

    function allPairs(uint) external view returns (address pair);

    function allPairsLength() external view returns (uint);

    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint);

    function balanceOf(address owner) external view returns (uint);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);

    function transfer(address to, uint value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint);

    function permit(
        address owner,
        address spender,
        uint value,
        uint deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(
        address indexed sender,
        uint amount0,
        uint amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function price0CumulativeLast() external view returns (uint);

    function price1CumulativeLast() external view returns (uint);

    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);

    function burn(address to) external returns (uint amount0, uint amount1);

    function swap(
        uint amount0Out,
        uint amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    // function WETH() external pure returns (address);

    function WPLS() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountToken, uint amountETH);

    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactETHForTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function swapTokensForExactETH(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactTokensForETH(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapETHForExactTokens(
        uint amountOut,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function quote(
        uint amountA,
        uint reserveA,
        uint reserveB
    ) external pure returns (uint amountB);

    function getAmountOut(
        uint amountIn,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountOut);

    function getAmountIn(
        uint amountOut,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountIn);

    function getAmountsOut(
        uint amountIn,
        address[] calldata path
    ) external view returns (uint[] memory amounts);

    function getAmountsIn(
        uint amountOut,
        address[] calldata path
    ) external view returns (uint[] memory amounts);
}
          

/*
 * SPDX-License-Identifier: MIT
 */

pragma solidity ^0.8.19;

import "./IUniswapV2Router01.sol";

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}
          

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.19;

/// @title The interface for the Uniswap V3 Factory
/// @notice The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees
interface IUniswapV3Factory {
    /// @notice Returns the pool address for a given pair of tokens and a fee, or address 0 if it does not exist
    /// @dev tokenA and tokenB may be passed in either token0/token1 or token1/token0 order
    /// @param tokenA The contract address of either token0 or token1
    /// @param tokenB The contract address of the other token
    /// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
    /// @return pool The pool address
    function getPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) external view returns (address pool);
}
          

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.19;

import "./pool/IUniswapV3PoolImmutables.sol";

/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is IUniswapV3PoolImmutables {

}
          

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.19;

/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
    /// @notice The first of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token0() external view returns (address);

    /// @notice The second of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token1() external view returns (address);

    /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
    /// @return The fee
    function fee() external view returns (uint24);
}