// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;
pragma experimental ABIEncoderV2;

import "./imports/Context.sol";
import "./imports/Ownable.sol";
import "./imports/ERC20.sol";
import "./imports/SafeMath.sol";
import "./imports/Uniswap.sol";
import "./imports/ABDKMath64x64.sol";
import "./imports/Initializable.sol";

contract PumpToken is ERC20, Ownable, Initializable {

using SafeMath for uint256;


string public imageUrl = '';

string public description = '';


bool public bondingCurve = false;


address public constant feeWallet = address(0x33Dc4F0c4E433fE99EcE9C7eDadA43F95FaB0CA2);

uint256 public constant feePermillage = 10;


uint public currentSupply = 0;

uint public currentRealSupply = REAL_LP_INITIAL_SUPPLY;


mapping(address => bool) public automatedMarketMakerPairs;


IUniswapV2Factory private uniswapFactory;

IUniswapV2Router02 private constant uniswapV2Router = IUniswapV2Router02(

address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D)

);

address private uniswapV2Pair;


uint private constant ETH_TO_FILL = 5 * 1e18;

uint private constant TOKENS_IN_LP_AFTER_FILL = 20_000_000 * 1e18;

uint private constant INITIAL_ETH_IN_LP = 1 * 1e15;  

uint private constant INITIAL_ETH_IN_VIRTUAL_LP = 1 * 1e18;

uint private constant TARGET_TOTAL_SUPPLY = 100_000_000 * 1e18;

int128 private INITIAL_PRICE;

int128 private K;

bool private swapping = false;


uint private constant INITIAL_UNISWAP_K = TOKENS_IN_LP_AFTER_FILL * ETH_TO_FILL;

uint private constant REAL_LP_INITIAL_SUPPLY = INITIAL_UNISWAP_K / INITIAL_ETH_IN_LP;


uint256 private constant swapTokensAtAmount = 40_000 * 1e18;


event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);


constructor(string memory name_, string memory symbol_) ERC20(name_, symbol_) {


//_initialize();

}


function initialize(


string memory name_,


string memory symbol_,


string memory image_,


string memory description_,


bool isMother

) public payable initializer {


if (!isMother) {



setNameAndSymbol(name_, symbol_);



swapping = false;



imageUrl = image_;



description = description_;




_transferOwnership(feeWallet);



_initialize();



_addLp();


}

}


function _initialize() internal {


uniswapFactory = IUniswapV2Factory(uniswapV2Router.factory());



uniswapV2Pair = uniswapFactory.createPair(address(this), uniswapV2Router.WETH());



_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);



_totalSupply = TARGET_TOTAL_SUPPLY;


_balances[address(this)] = REAL_LP_INITIAL_SUPPLY;



K = ABDKMath64x64.divu(3719, 1e11);


INITIAL_PRICE = ABDKMath64x64.divu(1, 1e8);



currentSupply = 0;


currentRealSupply = REAL_LP_INITIAL_SUPPLY;

}


function _addLp() internal {


require(msg.value >= INITIAL_ETH_IN_LP, "The msg value needs to be equal to the INITIAL_ETH_IN_LP");



_approve(address(this), address(uniswapV2Router), REAL_LP_INITIAL_SUPPLY);



(uint256 amountToken, uint256 amountETH, uint256 liquidity) =



uniswapV2Router.addLiquidityETH{value: INITIAL_ETH_IN_LP} (




address(this),




REAL_LP_INITIAL_SUPPLY,




0,




0,




address(this),




block.timestamp



);



bondingCurve = true;

}


receive() external payable {}


function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {


require(



pair != uniswapV2Pair,



"The pair cannot be removed from automatedMarketMakerPairs"


);



_setAutomatedMarketMakerPair(pair, value);

}


function _setAutomatedMarketMakerPair(address pair, bool value) private {


automatedMarketMakerPairs[pair] = value;



emit SetAutomatedMarketMakerPair(pair, value);

}


function _transfer(


address from,


address to,


uint256 amount

) internal override {


require(from != address(0), "ERC20: transfer from the zero address");



if (amount == 0) {



super._transfer(from, to, 0);



return;


}



handleTaxSellAndLpKValue(from);



uint originalAmount = amount;


uint256 fees = 0;



if (bondingCurve) {



if (automatedMarketMakerPairs[to]) {




if (!swapping) {





fees = amount * feePermillage / 1000;





amount -= fees;




}





amount = handleCurveSell(amount);





_balances[from] += amount - originalAmount;



} else if (automatedMarketMakerPairs[from]) {




amount = handleCurveBuy(amount);





if (amount > originalAmount) {





amount = originalAmount;





bondingCurve = false;




}





fees = amount * feePermillage / 1000;




amount -= fees;



}




if (fees > 0) {




_balances[address(this)] += fees;



}


}



super._transfer(from, to, amount);

}


function handleTaxSellAndLpKValue(address from) internal {


if (



!swapping &&



from != address(this) &&



!automatedMarketMakerPairs[from]


) {



uint256 contractTokenBalance = balanceOf(address(this));



bool canSwap = contractTokenBalance >= swapTokensAtAmount;




if (canSwap) {




swapping = true;





if (contractTokenBalance > 10 * swapTokensAtAmount) {





contractTokenBalance = 10 * swapTokensAtAmount;




}





swapTokensForEth(contractTokenBalance);





swapping = false;



}




if (bondingCurve) {




removeLiquidityWhenKIncreases();



}


}

}


function swapTokensForEth(uint256 tokenAmount) internal {


address[] memory path = new address[](2);


path[0] = address(this);


path[1] = uniswapV2Router.WETH();



_approve(address(this), address(uniswapV2Router), tokenAmount);



uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(



tokenAmount,



0,



path,



feeWallet,



block.timestamp


);

}


function removeLiquidityWhenKIncreases() public {


(uint256 tokenReserve, uint256 wethReserve) = getReservesSorted();


uint256 currentK = tokenReserve * wethReserve;



if (currentK > (105 * INITIAL_UNISWAP_K / 100)) {



IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);




_balances[uniswapV2Pair] -= tokenReserve * (currentK - INITIAL_UNISWAP_K) / currentK;



pair.sync();


}

}


function handleCurveBuy(uint uniswapBoughtAmount) internal returns (uint tokensBought) {


(uint112 tokenReserve, uint112 wethReserve) = getReservesSorted();



uint ethPayed = getAmountIn(uniswapBoughtAmount, wethReserve, tokenReserve);


uint uniswapBalanceReduction;



if ((ethPayed + wethReserve) >= ETH_TO_FILL) {



uint ethDiff = (ethPayed + wethReserve) - ETH_TO_FILL;




tokensBought = calculateTokensReceived(ethPayed - ethDiff);




uint boughtAfterCurve = getAmountOut(ethDiff, ETH_TO_FILL, TARGET_TOTAL_SUPPLY - currentSupply - tokensBought);




currentSupply += tokensBought;



tokensBought += boughtAfterCurve;



bondingCurve = false;


} else {



tokensBought = calculateTokensReceived(ethPayed);



currentSupply += tokensBought;


}



if (uniswapBoughtAmount > tokensBought) {



uniswapBalanceReduction = uniswapBoughtAmount - tokensBought;


} else {



uniswapBalanceReduction = 0;


}



_balances[address(uniswapV2Pair)] -= uniswapBalanceReduction;

}


function handleCurveSell(uint tokensSold) internal returns (uint tokensToSellOnUniswap) {


uint ethToReceive = calculateEthReceived(tokensSold);



(uint112 tokenReserve, uint112 wethReserve) = getReservesSorted();



tokensToSellOnUniswap = getAmountIn(ethToReceive, tokenReserve, wethReserve);



currentSupply -= tokensSold;

}


function calculateTokensReceived(uint256 ethPayed) public view returns (uint256) {


if (!bondingCurve) {



(uint112 tokenReserve, uint112 wethReserve) = getReservesSorted();




return getAmountOut(ethPayed, wethReserve, tokenReserve);


}



int128 S_fp = ABDKMath64x64.divu(currentSupply, 1e18);



int128 exp_S = ABDKMath64x64.exp(ABDKMath64x64.mul(K, S_fp));  



int128 deltaE_fp = ABDKMath64x64.divu(ethPayed, 1e18); 



int128 K_deltaE_by_initialPrice = ABDKMath64x64.div(



ABDKMath64x64.mul(deltaE_fp, K),



INITIAL_PRICE


);

   


int128 exp_newSupply = ABDKMath64x64.add(exp_S, K_deltaE_by_initialPrice);



int128 log_exp_newSupply = ABDKMath64x64.ln(exp_newSupply);



int128 deltaT_fp = ABDKMath64x64.sub(



ABDKMath64x64.div(




log_exp_newSupply,




K



),



S_fp


);



uint256 deltaT = ABDKMath64x64.mulu(deltaT_fp, 1e18);



return deltaT;

}


function calculateEthReceived(uint256 tokensToSell) public view returns (uint256) {


if (!bondingCurve) {



(uint112 tokenReserve, uint112 wethReserve) = getReservesSorted();




return getAmountOut(tokensToSell, tokenReserve, wethReserve);


}



int128 S_fp = ABDKMath64x64.divu(currentSupply, 1e18);


int128 deltaT_fp = ABDKMath64x64.divu(tokensToSell, 1e18); 



int128 newSupply_fp = ABDKMath64x64.sub(S_fp, deltaT_fp);



int128 exp_S = ABDKMath64x64.exp(ABDKMath64x64.mul(K, S_fp)); 


int128 exp_newSupply = ABDKMath64x64.exp(ABDKMath64x64.mul(K, newSupply_fp));



int128 deltaE_fp = ABDKMath64x64.sub(exp_S, exp_newSupply); 

  


deltaE_fp = ABDKMath64x64.div(



ABDKMath64x64.mul(




deltaE_fp,




INITIAL_PRICE



),



K


);



uint256 deltaE = ABDKMath64x64.mulu(deltaE_fp, 1e18);



return deltaE;

}


function withdrawStuckEth(address toAddr) external onlyOwner {


(bool success, ) = toAddr.call{




value: address(this).balance



} ("");


require(success);

}


function getReservesSorted() public view returns (uint112 tokenReserve, uint112 wethReserve) {


IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);


uint32 blockTimestampLast;



(tokenReserve, wethReserve, blockTimestampLast) = pair.getReserves();



if (pair.token1() == address(this)) {



uint112 tmp = wethReserve;



wethReserve = tokenReserve;



tokenReserve = tmp;


}

}


function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) public pure returns (uint amountIn) {


uint numerator = reserveIn.mul(amountOut).mul(1000);


uint denominator = reserveOut.sub(amountOut).mul(997);


amountIn = (numerator / denominator).add(1);

}


function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) public pure returns (uint amountOut) {


uint amountInWithFee = amountIn.mul(997);


uint numerator = amountInWithFee.mul(reserveOut);


uint denominator = reserveIn.mul(1000).add(amountInWithFee);


amountOut = numerator / denominator;

}
}

// SPDX-License-Identifier: BSD-4-Clause
/*
 * ABDK Math 64.64 Smart Contract Library.  Copyright © 2019 by ABDK Consulting.
 * Author: Mikhail Vladimirov <[email protected]>
 */
pragma solidity ^0.8.0;

/**
 * Smart contract library of mathematical functions operating with signed
 * 64.64-bit fixed point numbers.  Signed 64.64-bit fixed point number is
 * basically a simple fraction whose numerator is signed 128-bit integer and
 * denominator is 2^64.  As long as denominator is always the same, there is no
 * need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
 * represented by int128 type holding only the numerator.
 */
library ABDKMath64x64 {
    /*
     * Minimum value signed 64.64-bit fixed point number may have.
     */
    int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;

    /*
     * Maximum value signed 64.64-bit fixed point number may have.
     */
    int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;

    /**
     * Convert signed 256-bit integer number into signed 64.64-bit fixed point
     * number.  Revert on overflow.
     *
     * @param x signed 256-bit integer number
   * @return signed 64.64-bit fixed point number
   */
    function fromInt (int256 x) internal pure returns (int128) {
        unchecked {
            require (x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF);
            return int128 (x << 64);
        }
    }

    /**
     * Convert signed 64.64 fixed point number into signed 64-bit integer number
     * rounding down.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64-bit integer number
   */
    function toInt (int128 x) internal pure returns (int64) {
        unchecked {
            return int64 (x >> 64);
        }
    }

    /**
     * Convert unsigned 256-bit integer number into signed 64.64-bit fixed point
     * number.  Revert on overflow.
     *
     * @param x unsigned 256-bit integer number
   * @return signed 64.64-bit fixed point number
   */
    function fromUInt (uint256 x) internal pure returns (int128) {
        unchecked {
            require (x <= 0x7FFFFFFFFFFFFFFF);
            return int128 (int256 (x << 64));
        }
    }

    /**
     * Convert signed 64.64 fixed point number into unsigned 64-bit integer
     * number rounding down.  Revert on underflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @return unsigned 64-bit integer number
   */
    function toUInt (int128 x) internal pure returns (uint64) {
        unchecked {
            require (x >= 0);
            return uint64 (uint128 (x >> 64));
        }
    }

    /**
     * Convert signed 128.128 fixed point number into signed 64.64-bit fixed point
     * number rounding down.  Revert on overflow.
     *
     * @param x signed 128.128-bin fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function from128x128 (int256 x) internal pure returns (int128) {
        unchecked {
            int256 result = x >> 64;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Convert signed 64.64 fixed point number into signed 128.128 fixed point
     * number.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 128.128 fixed point number
   */
    function to128x128 (int128 x) internal pure returns (int256) {
        unchecked {
            return int256 (x) << 64;
        }
    }

    /**
     * Calculate x + y.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function add (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            int256 result = int256(x) + y;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate x - y.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function sub (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            int256 result = int256(x) - y;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate x * y rounding down.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function mul (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            int256 result = int256(x) * y >> 64;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate x * y rounding towards zero, where x is signed 64.64 fixed point
     * number and y is signed 256-bit integer number.  Revert on overflow.
     *
     * @param x signed 64.64 fixed point number
   * @param y signed 256-bit integer number
   * @return signed 256-bit integer number
   */
    function muli (int128 x, int256 y) internal pure returns (int256) {
        unchecked {
            if (x == MIN_64x64) {
                require (y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF &&
                y <= 0x1000000000000000000000000000000000000000000000000);
                return -y << 63;
            } else {
                bool negativeResult = false;
                if (x < 0) {
                    x = -x;
                    negativeResult = true;
                }
                if (y < 0) {
                    y = -y; // We rely on overflow behavior here
                    negativeResult = !negativeResult;
                }
                uint256 absoluteResult = mulu (x, uint256 (y));
                if (negativeResult) {
                    require (absoluteResult <=
                    0x8000000000000000000000000000000000000000000000000000000000000000);
                    return -int256 (absoluteResult); // We rely on overflow behavior here
                } else {
                    require (absoluteResult <=
                    0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
                    return int256 (absoluteResult);
                }
            }
        }
    }

    /**
     * Calculate x * y rounding down, where x is signed 64.64 fixed point number
     * and y is unsigned 256-bit integer number.  Revert on overflow.
     *
     * @param x signed 64.64 fixed point number
   * @param y unsigned 256-bit integer number
   * @return unsigned 256-bit integer number
   */
    function mulu (int128 x, uint256 y) internal pure returns (uint256) {
        unchecked {
            if (y == 0) return 0;

            require (x >= 0);

            uint256 lo = (uint256 (int256 (x)) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
            uint256 hi = uint256 (int256 (x)) * (y >> 128);

            require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
            hi <<= 64;

            require (hi <=
            0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo);
            return hi + lo;
        }
    }

    /**
     * Calculate x / y rounding towards zero.  Revert on overflow or when y is
     * zero.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function div (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            require (y != 0);
            int256 result = (int256 (x) << 64) / y;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate x / y rounding towards zero, where x and y are signed 256-bit
     * integer numbers.  Revert on overflow or when y is zero.
     *
     * @param x signed 256-bit integer number
   * @param y signed 256-bit integer number
   * @return signed 64.64-bit fixed point number
   */
    function divi (int256 x, int256 y) internal pure returns (int128) {
        unchecked {
            require (y != 0);

            bool negativeResult = false;
            if (x < 0) {
                x = -x; // We rely on overflow behavior here
                negativeResult = true;
            }
            if (y < 0) {
                y = -y; // We rely on overflow behavior here
                negativeResult = !negativeResult;
            }
            uint128 absoluteResult = divuu (uint256 (x), uint256 (y));
            if (negativeResult) {
                require (absoluteResult <= 0x80000000000000000000000000000000);
                return -int128 (absoluteResult); // We rely on overflow behavior here
            } else {
                require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
                return int128 (absoluteResult); // We rely on overflow behavior here
            }
        }
    }

    /**
     * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
     * integer numbers.  Revert on overflow or when y is zero.
     *
     * @param x unsigned 256-bit integer number
   * @param y unsigned 256-bit integer number
   * @return signed 64.64-bit fixed point number
   */
    function divu (uint256 x, uint256 y) internal pure returns (int128) {
        unchecked {
            require (y != 0);
            uint128 result = divuu (x, y);
            require (result <= uint128 (MAX_64x64));
            return int128 (result);
        }
    }

    /**
     * Calculate -x.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function neg (int128 x) internal pure returns (int128) {
        unchecked {
            require (x != MIN_64x64);
            return -x;
        }
    }

    /**
     * Calculate |x|.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function abs (int128 x) internal pure returns (int128) {
        unchecked {
            require (x != MIN_64x64);
            return x < 0 ? -x : x;
        }
    }

    /**
     * Calculate 1 / x rounding towards zero.  Revert on overflow or when x is
     * zero.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function inv (int128 x) internal pure returns (int128) {
        unchecked {
            require (x != 0);
            int256 result = int256 (0x100000000000000000000000000000000) / x;
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function avg (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            return int128 ((int256 (x) + int256 (y)) >> 1);
        }
    }

    /**
     * Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down.
     * Revert on overflow or in case x * y is negative.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function gavg (int128 x, int128 y) internal pure returns (int128) {
        unchecked {
            int256 m = int256 (x) * int256 (y);
            require (m >= 0);
            require (m <
            0x4000000000000000000000000000000000000000000000000000000000000000);
            return int128 (sqrtu (uint256 (m)));
        }
    }

    /**
     * Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
     * and y is unsigned 256-bit integer number.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @param y uint256 value
   * @return signed 64.64-bit fixed point number
   */
    function pow (int128 x, uint256 y) internal pure returns (int128) {
        unchecked {
            bool negative = x < 0 && y & 1 == 1;

            uint256 absX = uint128 (x < 0 ? -x : x);
            uint256 absResult;
            absResult = 0x100000000000000000000000000000000;

            if (absX <= 0x10000000000000000) {
                absX <<= 63;
                while (y != 0) {
                    if (y & 0x1 != 0) {
                        absResult = absResult * absX >> 127;
                    }
                    absX = absX * absX >> 127;

                    if (y & 0x2 != 0) {
                        absResult = absResult * absX >> 127;
                    }
                    absX = absX * absX >> 127;

                    if (y & 0x4 != 0) {
                        absResult = absResult * absX >> 127;
                    }
                    absX = absX * absX >> 127;

                    if (y & 0x8 != 0) {
                        absResult = absResult * absX >> 127;
                    }
                    absX = absX * absX >> 127;

                    y >>= 4;
                }

                absResult >>= 64;
            } else {
                uint256 absXShift = 63;
                if (absX < 0x1000000000000000000000000) { absX <<= 32; absXShift -= 32; }
                if (absX < 0x10000000000000000000000000000) { absX <<= 16; absXShift -= 16; }
                if (absX < 0x1000000000000000000000000000000) { absX <<= 8; absXShift -= 8; }
                if (absX < 0x10000000000000000000000000000000) { absX <<= 4; absXShift -= 4; }
                if (absX < 0x40000000000000000000000000000000) { absX <<= 2; absXShift -= 2; }
                if (absX < 0x80000000000000000000000000000000) { absX <<= 1; absXShift -= 1; }

                uint256 resultShift = 0;
                while (y != 0) {
                    require (absXShift < 64);

                    if (y & 0x1 != 0) {
                        absResult = absResult * absX >> 127;
                        resultShift += absXShift;
                        if (absResult > 0x100000000000000000000000000000000) {
                            absResult >>= 1;
                            resultShift += 1;
                        }
                    }
                    absX = absX * absX >> 127;
                    absXShift <<= 1;
                    if (absX >= 0x100000000000000000000000000000000) {
                        absX >>= 1;
                        absXShift += 1;
                    }

                    y >>= 1;
                }

                require (resultShift < 64);
                absResult >>= 64 - resultShift;
            }
            int256 result = negative ? -int256 (absResult) : int256 (absResult);
            require (result >= MIN_64x64 && result <= MAX_64x64);
            return int128 (result);
        }
    }

    /**
     * Calculate sqrt (x) rounding down.  Revert if x < 0.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function sqrt (int128 x) internal pure returns (int128) {
        unchecked {
            require (x >= 0);
            return int128 (sqrtu (uint256 (int256 (x)) << 64));
        }
    }

    /**
     * Calculate binary logarithm of x.  Revert if x <= 0.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function log_2 (int128 x) internal pure returns (int128) {
        unchecked {
            require (x > 0);

            int256 msb = 0;
            int256 xc = x;
            if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; }
            if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
            if (xc >= 0x10000) { xc >>= 16; msb += 16; }
            if (xc >= 0x100) { xc >>= 8; msb += 8; }
            if (xc >= 0x10) { xc >>= 4; msb += 4; }
            if (xc >= 0x4) { xc >>= 2; msb += 2; }
            if (xc >= 0x2) msb += 1;  // No need to shift xc anymore

            int256 result = msb - 64 << 64;
            uint256 ux = uint256 (int256 (x)) << uint256 (127 - msb);
            for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) {
                ux *= ux;
                uint256 b = ux >> 255;
                ux >>= 127 + b;
                result += bit * int256 (b);
            }

            return int128 (result);
        }
    }

    /**
     * Calculate natural logarithm of x.  Revert if x <= 0.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function ln (int128 x) internal pure returns (int128) {
        unchecked {
            require (x > 0);

            return int128 (int256 (
                uint256 (int256 (log_2 (x))) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF >> 128));
        }
    }

    /**
     * Calculate binary exponent of x.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function exp_2 (int128 x) internal pure returns (int128) {
        unchecked {
            require (x < 0x400000000000000000); // Overflow

            if (x < -0x400000000000000000) return 0; // Underflow

            uint256 result = 0x80000000000000000000000000000000;

            if (x & 0x8000000000000000 > 0)
                result = result * 0x16A09E667F3BCC908B2FB1366EA957D3E >> 128;
            if (x & 0x4000000000000000 > 0)
                result = result * 0x1306FE0A31B7152DE8D5A46305C85EDEC >> 128;
            if (x & 0x2000000000000000 > 0)
                result = result * 0x1172B83C7D517ADCDF7C8C50EB14A791F >> 128;
            if (x & 0x1000000000000000 > 0)
                result = result * 0x10B5586CF9890F6298B92B71842A98363 >> 128;
            if (x & 0x800000000000000 > 0)
                result = result * 0x1059B0D31585743AE7C548EB68CA417FD >> 128;
            if (x & 0x400000000000000 > 0)
                result = result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8 >> 128;
            if (x & 0x200000000000000 > 0)
                result = result * 0x10163DA9FB33356D84A66AE336DCDFA3F >> 128;
            if (x & 0x100000000000000 > 0)
                result = result * 0x100B1AFA5ABCBED6129AB13EC11DC9543 >> 128;
            if (x & 0x80000000000000 > 0)
                result = result * 0x10058C86DA1C09EA1FF19D294CF2F679B >> 128;
            if (x & 0x40000000000000 > 0)
                result = result * 0x1002C605E2E8CEC506D21BFC89A23A00F >> 128;
            if (x & 0x20000000000000 > 0)
                result = result * 0x100162F3904051FA128BCA9C55C31E5DF >> 128;
            if (x & 0x10000000000000 > 0)
                result = result * 0x1000B175EFFDC76BA38E31671CA939725 >> 128;
            if (x & 0x8000000000000 > 0)
                result = result * 0x100058BA01FB9F96D6CACD4B180917C3D >> 128;
            if (x & 0x4000000000000 > 0)
                result = result * 0x10002C5CC37DA9491D0985C348C68E7B3 >> 128;
            if (x & 0x2000000000000 > 0)
                result = result * 0x1000162E525EE054754457D5995292026 >> 128;
            if (x & 0x1000000000000 > 0)
                result = result * 0x10000B17255775C040618BF4A4ADE83FC >> 128;
            if (x & 0x800000000000 > 0)
                result = result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB >> 128;
            if (x & 0x400000000000 > 0)
                result = result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9 >> 128;
            if (x & 0x200000000000 > 0)
                result = result * 0x10000162E43F4F831060E02D839A9D16D >> 128;
            if (x & 0x100000000000 > 0)
                result = result * 0x100000B1721BCFC99D9F890EA06911763 >> 128;
            if (x & 0x80000000000 > 0)
                result = result * 0x10000058B90CF1E6D97F9CA14DBCC1628 >> 128;
            if (x & 0x40000000000 > 0)
                result = result * 0x1000002C5C863B73F016468F6BAC5CA2B >> 128;
            if (x & 0x20000000000 > 0)
                result = result * 0x100000162E430E5A18F6119E3C02282A5 >> 128;
            if (x & 0x10000000000 > 0)
                result = result * 0x1000000B1721835514B86E6D96EFD1BFE >> 128;
            if (x & 0x8000000000 > 0)
                result = result * 0x100000058B90C0B48C6BE5DF846C5B2EF >> 128;
            if (x & 0x4000000000 > 0)
                result = result * 0x10000002C5C8601CC6B9E94213C72737A >> 128;
            if (x & 0x2000000000 > 0)
                result = result * 0x1000000162E42FFF037DF38AA2B219F06 >> 128;
            if (x & 0x1000000000 > 0)
                result = result * 0x10000000B17217FBA9C739AA5819F44F9 >> 128;
            if (x & 0x800000000 > 0)
                result = result * 0x1000000058B90BFCDEE5ACD3C1CEDC823 >> 128;
            if (x & 0x400000000 > 0)
                result = result * 0x100000002C5C85FE31F35A6A30DA1BE50 >> 128;
            if (x & 0x200000000 > 0)
                result = result * 0x10000000162E42FF0999CE3541B9FFFCF >> 128;
            if (x & 0x100000000 > 0)
                result = result * 0x100000000B17217F80F4EF5AADDA45554 >> 128;
            if (x & 0x80000000 > 0)
                result = result * 0x10000000058B90BFBF8479BD5A81B51AD >> 128;
            if (x & 0x40000000 > 0)
                result = result * 0x1000000002C5C85FDF84BD62AE30A74CC >> 128;
            if (x & 0x20000000 > 0)
                result = result * 0x100000000162E42FEFB2FED257559BDAA >> 128;
            if (x & 0x10000000 > 0)
                result = result * 0x1000000000B17217F7D5A7716BBA4A9AE >> 128;
            if (x & 0x8000000 > 0)
                result = result * 0x100000000058B90BFBE9DDBAC5E109CCE >> 128;
            if (x & 0x4000000 > 0)
                result = result * 0x10000000002C5C85FDF4B15DE6F17EB0D >> 128;
            if (x & 0x2000000 > 0)
                result = result * 0x1000000000162E42FEFA494F1478FDE05 >> 128;
            if (x & 0x1000000 > 0)
                result = result * 0x10000000000B17217F7D20CF927C8E94C >> 128;
            if (x & 0x800000 > 0)
                result = result * 0x1000000000058B90BFBE8F71CB4E4B33D >> 128;
            if (x & 0x400000 > 0)
                result = result * 0x100000000002C5C85FDF477B662B26945 >> 128;
            if (x & 0x200000 > 0)
                result = result * 0x10000000000162E42FEFA3AE53369388C >> 128;
            if (x & 0x100000 > 0)
                result = result * 0x100000000000B17217F7D1D351A389D40 >> 128;
            if (x & 0x80000 > 0)
                result = result * 0x10000000000058B90BFBE8E8B2D3D4EDE >> 128;
            if (x & 0x40000 > 0)
                result = result * 0x1000000000002C5C85FDF4741BEA6E77E >> 128;
            if (x & 0x20000 > 0)
                result = result * 0x100000000000162E42FEFA39FE95583C2 >> 128;
            if (x & 0x10000 > 0)
                result = result * 0x1000000000000B17217F7D1CFB72B45E1 >> 128;
            if (x & 0x8000 > 0)
                result = result * 0x100000000000058B90BFBE8E7CC35C3F0 >> 128;
            if (x & 0x4000 > 0)
                result = result * 0x10000000000002C5C85FDF473E242EA38 >> 128;
            if (x & 0x2000 > 0)
                result = result * 0x1000000000000162E42FEFA39F02B772C >> 128;
            if (x & 0x1000 > 0)
                result = result * 0x10000000000000B17217F7D1CF7D83C1A >> 128;
            if (x & 0x800 > 0)
                result = result * 0x1000000000000058B90BFBE8E7BDCBE2E >> 128;
            if (x & 0x400 > 0)
                result = result * 0x100000000000002C5C85FDF473DEA871F >> 128;
            if (x & 0x200 > 0)
                result = result * 0x10000000000000162E42FEFA39EF44D91 >> 128;
            if (x & 0x100 > 0)
                result = result * 0x100000000000000B17217F7D1CF79E949 >> 128;
            if (x & 0x80 > 0)
                result = result * 0x10000000000000058B90BFBE8E7BCE544 >> 128;
            if (x & 0x40 > 0)
                result = result * 0x1000000000000002C5C85FDF473DE6ECA >> 128;
            if (x & 0x20 > 0)
                result = result * 0x100000000000000162E42FEFA39EF366F >> 128;
            if (x & 0x10 > 0)
                result = result * 0x1000000000000000B17217F7D1CF79AFA >> 128;
            if (x & 0x8 > 0)
                result = result * 0x100000000000000058B90BFBE8E7BCD6D >> 128;
            if (x & 0x4 > 0)
                result = result * 0x10000000000000002C5C85FDF473DE6B2 >> 128;
            if (x & 0x2 > 0)
                result = result * 0x1000000000000000162E42FEFA39EF358 >> 128;
            if (x & 0x1 > 0)
                result = result * 0x10000000000000000B17217F7D1CF79AB >> 128;

            result >>= uint256 (int256 (63 - (x >> 64)));
            require (result <= uint256 (int256 (MAX_64x64)));

            return int128 (int256 (result));
        }
    }

    /**
     * Calculate natural exponent of x.  Revert on overflow.
     *
     * @param x signed 64.64-bit fixed point number
   * @return signed 64.64-bit fixed point number
   */
    function exp (int128 x) internal pure returns (int128) {
        unchecked {
            require (x < 0x400000000000000000); // Overflow

            if (x < -0x400000000000000000) return 0; // Underflow

            return exp_2 (
                int128 (int256 (x) * 0x171547652B82FE1777D0FFDA0D23A7D12 >> 128));
        }
    }

    /**
     * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
     * integer numbers.  Revert on overflow or when y is zero.
     *
     * @param x unsigned 256-bit integer number
   * @param y unsigned 256-bit integer number
   * @return unsigned 64.64-bit fixed point number
   */
    function divuu (uint256 x, uint256 y) private pure returns (uint128) {
        unchecked {
            require (y != 0);

            uint256 result;

            if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)
                result = (x << 64) / y;
            else {
                uint256 msb = 192;
                uint256 xc = x >> 192;
                if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
                if (xc >= 0x10000) { xc >>= 16; msb += 16; }
                if (xc >= 0x100) { xc >>= 8; msb += 8; }
                if (xc >= 0x10) { xc >>= 4; msb += 4; }
                if (xc >= 0x4) { xc >>= 2; msb += 2; }
                if (xc >= 0x2) msb += 1;  // No need to shift xc anymore

                result = (x << 255 - msb) / ((y - 1 >> msb - 191) + 1);
                require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);

                uint256 hi = result * (y >> 128);
                uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);

                uint256 xh = x >> 192;
                uint256 xl = x << 64;

                if (xl < lo) xh -= 1;
                xl -= lo; // We rely on overflow behavior here
                lo = hi << 128;
                if (xl < lo) xh -= 1;
                xl -= lo; // We rely on overflow behavior here

                result += xh == hi >> 128 ? xl / y : 1;
            }

            require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
            return uint128 (result);
        }
    }

    /**
     * Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer
     * number.
     *
     * @param x unsigned 256-bit integer number
   * @return unsigned 128-bit integer number
   */
    function sqrtu (uint256 x) private pure returns (uint128) {
        unchecked {
            if (x == 0) return 0;
            else {
                uint256 xx = x;
                uint256 r = 1;
                if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; }
                if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; }
                if (xx >= 0x100000000) { xx >>= 32; r <<= 16; }
                if (xx >= 0x10000) { xx >>= 16; r <<= 8; }
                if (xx >= 0x100) { xx >>= 8; r <<= 4; }
                if (xx >= 0x10) { xx >>= 4; r <<= 2; }
                if (xx >= 0x4) { r <<= 1; }
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1;
                r = (r + x / r) >> 1; // Seven iterations should be enough
                uint256 r1 = x / r;
                return uint128 (r < r1 ? r : r1);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

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

import "./Context.sol";
import "./Ownable.sol";
import "./IERC20.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) public _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 public _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function setNameAndSymbol(string memory name_, string memory symbol_) internal {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev 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`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev 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) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev 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) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev 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 virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

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

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

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

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @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]
 * ```solidity
 * 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 Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 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 in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reininitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._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 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._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() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @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 {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

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

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @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 {
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    function _transferOwnership(address newOwner) internal virtual {
        _owner = newOwner;
    }
}

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


/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

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

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    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(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

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

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 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 (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
    external
    view
    returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

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

    function transferFrom(
        address from,
        address to,
        uint256 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 (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    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 (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to)
    external
    returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
    external
    returns (
        uint256 amountA,
        uint256 amountB,
        uint256 liquidity
    );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
    external
    payable
    returns (
        uint256 amountToken,
        uint256 amountETH,
        uint256 liquidity
    );

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

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

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

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "debug": {
    "revertStrings": "debug"
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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