// File: contracts/BurnTokenX.sol



// SPDX-License-Identifier: Unlicensed

/**

Telegram Portal: https://t.me/ShibaDoge_Portal
Website: https://deflationary.com / https://burn.realshibadoge.com / https://realshibadoge.com
Twitter: https://twitter.com/RealShibaDoge
Medium: https://realshibadoge.medium.com
Discord: https://discord.gg/realshibadoge

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 */

pragma solidity 0.8.13;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";

import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";

import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";

contract BurnTokenX is ERC20Burnable, Ownable {
    uint256 constant _initial_supply = 1 * (10**12) * (10**18); // 1 trillion tokens, 18 decimals

    uint256 public tokensBurned;

    address payable public _treasuryWallet;
    address payable public _developmentWallet;
    address payable public _buybackWallet;

    uint256 public maxWalletSize = (_initial_supply * 15) / 10000; // .15% of totalsupply
    uint256 public maxTransactionSize = (_initial_supply * 15) / 100000; // .015% of totalsupply
    uint256 public swapThreshold = (_initial_supply * 135) / 1000000; // .0135% of totalsupply

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;

    uint256 liquidityLockTime = 0;

    mapping(address => bool) public _isBlackListedBot;

    mapping(address => bool) public _isExcludedFromFee;
    mapping(address => bool) public _isExcludedFromMaxTransaction;
    mapping(address => bool) public _isExcludedFromMaxWallet;

    enum FeeType {
        None,
        Buy,
        Sell
    }

    struct BuyFee {
        uint16 liquidity;
        uint16 treasury;
        uint16 dev;
        uint16 buyback;
    }

    struct SellFee {
        uint16 liquidity;
        uint16 treasury;
        uint16 dev;
        uint16 buyback;
    }

    BuyFee public buyFee;
    SellFee public sellFee;

    uint256 constant FEE_DENOM = 1000; // smallest fee unit is 0.1%

    event botAddedToBlacklist(address account);
    event botRemovedFromBlacklist(address account);

    event excludedFromFee(address account);
    event excludedFromMaxTransaction(address account);
    event excludedFromMaxWallet(address account);

    event includedInFee(address account);
    event includedInMaxTransaction(address account);
    event includedInMaxWallet(address account);

    event treasuryWalletUpdated(address treasuryWallet);
    event developmentWalletUpdated(address developmentWallet);
    event buybackWalletUpdated(address buybackWallet);

    event liquidityRemoved(uint256 amountToken, uint256 amountETH);

    event swapThresholdUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    event MaxWalletSizeUpdated(uint256 maxWalletSize);
    event MaxTransactionSizeUpdated(uint256 maxTransactionSize);

    event LiquidityLockTimeUpdated(uint256 lockTime);

    modifier lockTheSwap() {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor(
        string memory name__,
        string memory symbol__,
        address treasury,
        address development,
        address buyback,
        address[8] memory teamWallets
    ) ERC20(name__, symbol__) {
        // set fees to max
        setSellFee(470, 0, 480, 0);
        setBuyFee(470, 0, 480, 0);

        require(treasury != address(0), "Treasury wallet cannot be 0x0");
        require(development != address(0), "Development wallet cannot be 0x0");
        require(buyback != address(0), "Buyback wallet cannot be 0x0");

        _treasuryWallet = payable(treasury);
        _developmentWallet = payable(development);
        _buybackWallet = payable(buyback);

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        uniswapV2Router = _uniswapV2Router;

        _mint(msg.sender, (_initial_supply * 14) / 100); // 14% for deployer
        _mint(msg.sender, (_initial_supply * 5) / 100); // for liquidity pool

        _mint(teamWallets[0], (_initial_supply * 15) / 10000); // .15% for team 1
        _mint(teamWallets[1], (_initial_supply * 15) / 10000); // .15% for team 2
        _mint(teamWallets[2], (_initial_supply * 15) / 10000); // .15% for team 3
        _mint(teamWallets[3], (_initial_supply * 15) / 10000); // .15% for team 4
        _mint(teamWallets[4], (_initial_supply * 10) / 10000); // .1% for team 5
        _mint(teamWallets[5], (_initial_supply * 10) / 10000); // .1% for team 6
        _mint(teamWallets[6], (_initial_supply * 10) / 10000); // .1% for team 7
        _mint(teamWallets[7], (_initial_supply * 10) / 10000); // .1% for team 8

        _mint(
            0x000000000000000000000000000000000000dEaD,
            (_initial_supply * 80) / 100
        ); // burn baby burnnnnn it's a crypto inferno

        _isExcludedFromFee[msg.sender] = true;
        _isExcludedFromMaxTransaction[msg.sender] = true;
        _isExcludedFromMaxWallet[msg.sender] = true;

        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromMaxTransaction[address(this)] = true;
        _isExcludedFromMaxWallet[address(this)] = true;

        _isExcludedFromFee[_treasuryWallet] = true;
        _isExcludedFromMaxTransaction[_treasuryWallet] = true;
        _isExcludedFromMaxWallet[_treasuryWallet] = true;

        _isExcludedFromFee[_developmentWallet] = true;
        _isExcludedFromMaxTransaction[_developmentWallet] = true;
        _isExcludedFromMaxWallet[_developmentWallet] = true;

        _isExcludedFromFee[_buybackWallet] = true;
        _isExcludedFromMaxTransaction[_buybackWallet] = true;
        _isExcludedFromMaxWallet[_buybackWallet] = true;
    }

    //to receive ETH from uniswapV2Router when swapping
    receive() external payable {}

    // public functions

    function transfer(address to, uint256 amount)
        public
        override
        returns (bool)
    {
        address _owner = _msgSender();
        (bool takeFee, FeeType feeType) = checkFeeRequired(_owner, to);

        checkTransferAllowed(_owner, to, amount, takeFee);

        if (takeFee) {
            //check for swapAndLiquify available
            uint256 contractBalance = balanceOf(address(this));
            if (
                contractBalance >= swapThreshold &&
                !inSwapAndLiquify &&
                swapAndLiquifyEnabled &&
                _owner != uniswapV2Pair
            ) {
                //perform swapAndLiquify
                swapAndLiquify(swapThreshold);
            }

            uint256 fee = calculateFee(amount, feeType);
            _transfer(_owner, address(this), fee);
            _transfer(_owner, to, amount - fee);
        } else {
            _transfer(_owner, to, amount);
        }

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public override returns (bool) {
        address spender = _msgSender();

        (bool takeFee, FeeType feeType) = checkFeeRequired(from, to);
        checkTransferAllowed(from, to, amount, takeFee);

        _spendAllowance(from, spender, amount);

        if (takeFee) {
            //check for swapAndLiquify available
            uint256 contractBalance = balanceOf(address(this));
            if (
                contractBalance >= swapThreshold &&
                !inSwapAndLiquify &&
                swapAndLiquifyEnabled &&
                from != uniswapV2Pair
            ) {
                //perform swapAndLiquify
                swapAndLiquify(swapThreshold);
            }

            uint256 fee = calculateFee(amount, feeType);
            _transfer(from, address(this), fee);
            _transfer(from, to, amount - fee);
        } else {
            _transfer(from, to, amount);
        }

        return true;
    }

    function burn(uint256 amount) public override {
        _burn(_msgSender(), amount);
        tokensBurned += amount;
    }

    function burnFrom(address account, uint256 amount) public override {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
        tokensBurned += amount;
    }

    function liquidityLockedUntil() external view returns (uint256) {
        return liquidityLockTime;
    }

    // internal functions

    function checkTransferAllowed(
        address from,
        address to,
        uint256 amount,
        bool takeFee
    ) internal view {
        require(
            !_isBlackListedBot[from] || !_isBlackListedBot[to],
            "You are blacklisted"
        );
        if (to != uniswapV2Pair) {
            require(
                balanceOf(to) + amount < maxWalletSize ||
                    _isExcludedFromMaxWallet[to],
                "Exceeds receivers maximum wallet size"
            );
        }
        if (takeFee) {
            require(
                amount <= maxTransactionSize ||
                    (_isExcludedFromMaxTransaction[from] ||
                        _isExcludedFromMaxTransaction[to]),
                "Transaction larger than allowed"
            );
        }
    }

    function checkFeeRequired(address from, address to)
        internal
        view
        returns (bool, FeeType)
    {
        if (from == uniswapV2Pair && !_isExcludedFromFee[to]) {
            return (true, FeeType.Buy);
        } else if (to == uniswapV2Pair && !_isExcludedFromFee[from]) {
            return (true, FeeType.Sell);
        } else {
            return (false, FeeType.None);
        }
    }

    function calculateFee(uint256 amount, FeeType feeType)
        internal
        view
        returns (uint256 fee)
    {
        uint256 feePercentage = 0;
        if (feeType == FeeType.Buy) {
            feePercentage =
                buyFee.treasury +
                buyFee.liquidity +
                buyFee.dev +
                buyFee.buyback;
        } else if (feeType == FeeType.Sell) {
            feePercentage =
                sellFee.treasury +
                sellFee.liquidity +
                sellFee.dev +
                sellFee.buyback;
        }
        fee = (amount * feePercentage) / FEE_DENOM;

        return fee;
    }

    function swapAndLiquify(uint256 tokens) internal lockTheSwap {
        // split tokens by buy fee ratio
        uint256 feeDenominator = buyFee.treasury +
            buyFee.liquidity +
            buyFee.dev +
            buyFee.buyback;

        uint256 liquidityFee = (tokens * buyFee.liquidity) / feeDenominator;

        // sell tokens minus half of liquidity cut for eth
        swapTokensForEth(tokens - (liquidityFee / 2));

        // split resulting eth balance of contract by ratio, giving liquidity half weight
        uint256 contractEth = address(this).balance;

        uint256 ethDenominator = buyFee.treasury +
            (buyFee.liquidity / 2) +
            buyFee.dev +
            buyFee.buyback;

        uint256 treasuryEth = (contractEth * buyFee.treasury) / ethDenominator;
        uint256 liquidityEth = (contractEth * (buyFee.liquidity / 2)) /
            ethDenominator;
        uint256 buybackEth = (contractEth * buyFee.buyback) / ethDenominator;

        // provide liquidity with eth portion and remaining tokens

        if (liquidityEth > 0) {
            // Add liquidity to uniswap
            addLiquidity(liquidityFee / 2, liquidityEth);
        }

        _treasuryWallet.transfer(treasuryEth);

        _buybackWallet.transfer(buybackEth);

        // send all remaining eth to dev wallet (in case of rounding)
        _developmentWallet.transfer(address(this).balance); 

        emit SwapAndLiquify(tokens, contractEth, liquidityFee / 2);
    }

    function swapTokensForEth(uint256 tokenAmount) internal {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

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

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) internal {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(this),
            block.timestamp
        );
    }

    // admin functions

    function setTreasuryWallet(address treasury) external onlyOwner {
        require(treasury != address(0), "Treasury wallet cannot be 0x0");
        _treasuryWallet = payable(treasury);
        emit treasuryWalletUpdated(_treasuryWallet);
    }

    function setDevelopmentWallet(address development) external onlyOwner {
        require(development != address(0), "Development wallet cannot be 0x0");
        _developmentWallet = payable(development);
        emit developmentWalletUpdated(_developmentWallet);
    }

    function setBuybackWallet(address buyback) external onlyOwner {
        require(buyback != address(0), "Buyback wallet cannot be 0x0");
        _buybackWallet = payable(buyback);
        emit buybackWalletUpdated(_treasuryWallet);
    }

    function setSellFee(
        uint16 liquidity,
        uint16 treasury,
        uint16 dev,
        uint16 buyback
    ) public onlyOwner {
        require(
            liquidity + treasury + dev + buyback < FEE_DENOM,
            "invalid fee structure"
        );

        sellFee.treasury = treasury;
        sellFee.liquidity = liquidity;
        sellFee.dev = dev;
        sellFee.buyback = buyback;
    }

    function setBuyFee(
        uint16 liquidity,
        uint16 treasury,
        uint16 dev,
        uint16 buyback
    ) public onlyOwner {
        require(
            liquidity + treasury + dev + buyback < FEE_DENOM,
            "invalid fee structure"
        );

        buyFee.treasury = treasury;
        buyFee.liquidity = liquidity;
        buyFee.dev = dev;
        buyFee.buyback = buyback;
    }

    function setBothFees(
        uint16 buy_liquidity,
        uint16 buy_treasury,
        uint16 buy_dev,
        uint16 buy_buyback,
        uint16 sell_liquidity,
        uint16 sell_treasury,
        uint16 sell_dev,
        uint16 sell_buyback
    ) external onlyOwner {
        setBuyFee(buy_liquidity, buy_treasury, buy_dev, buy_buyback);

        setSellFee(sell_liquidity, sell_treasury, sell_dev, sell_buyback);
    }

    function setSwapThreshold(uint256 newSwapThreshold) external onlyOwner {
        swapThreshold = newSwapThreshold;
        emit swapThresholdUpdated(newSwapThreshold);
    }

    function setMaxTransactionSize(uint256 maxTxSize) external onlyOwner {
        maxTransactionSize = maxTxSize;
        emit MaxTransactionSizeUpdated(maxTransactionSize);
    }

    function setMaxWalletSize(uint256 maxWallet) external onlyOwner {
        maxWalletSize = maxWallet;
        emit MaxWalletSizeUpdated(maxWalletSize);
    }

    function addBotToBlacklist(address account) external onlyOwner {
        require(!_isBlackListedBot[account], "Account is already blacklisted");
        _isBlackListedBot[account] = true;

        emit botAddedToBlacklist(account);
    }

    function removeBotFromBlacklist(address account) external onlyOwner {
        require(_isBlackListedBot[account], "Account is not blacklisted");
        _isBlackListedBot[account] = false;

        emit botRemovedFromBlacklist(account);
    }

    function excludeFromFee(address account) external onlyOwner {
        require(
            !_isExcludedFromFee[account],
            "Account is already excluded from fee"
        );
        _isExcludedFromFee[account] = true;

        emit excludedFromFee(account);
    }

    function excludeFromMaxTransaction(address account) external onlyOwner {
        require(
            !_isExcludedFromMaxTransaction[account],
            "Account is already excluded from max transaction"
        );
        _isExcludedFromMaxTransaction[account] = true;

        emit excludedFromMaxTransaction(account);
    }

    function excludeFromMaxWallet(address account) external onlyOwner {
        require(
            !_isExcludedFromMaxWallet[account],
            "Account is already excluded from max wallet"
        );
        _isExcludedFromMaxWallet[account] = true;

        emit excludedFromMaxWallet(account);
    }

    function includeInFee(address account) external onlyOwner {
        require(
            _isExcludedFromFee[account],
            "Account is already included in fee"
        );
        _isExcludedFromFee[account] = false;

        emit includedInFee(account);
    }

    function includeInMaxTransaction(address account) external onlyOwner {
        require(
            _isExcludedFromMaxTransaction[account],
            "Account is already included in max transaction"
        );
        _isExcludedFromMaxTransaction[account] = false;

        emit includedInMaxTransaction(account);
    }

    function includeInMaxWallet(address account) external onlyOwner {
        require(
            _isExcludedFromMaxWallet[account],
            "Account is already included in max wallet"
        );
        _isExcludedFromMaxWallet[account] = false;

        emit includedInMaxWallet(account);
    }

    function updateLiquidityLock(uint256 lockTime) external onlyOwner {
        require(
            block.timestamp > liquidityLockTime,
            "New liquidity lock time must be after the current lock time"
        );
        liquidityLockTime = lockTime;
        emit LiquidityLockTimeUpdated(lockTime);
    }

    // wrapper for Uniswap removeLiquidity, can only be called if not locked
    function removeLiquidityETH(
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external onlyOwner {
        require(
            block.timestamp > liquidityLockTime,
            "Liquidity removal is locked"
        );

        (uint256 amountToken, uint256 amountETH) = uniswapV2Router
            .removeLiquidityETH(
                address(this),
                liquidity,
                amountTokenMin,
                amountETHMin,
                to,
                deadline
            );

        emit liquidityRemoved(amountToken, amountETH);
    }

    function toggleSwapAndLiquifyEnabled() external onlyOwner {
        swapAndLiquifyEnabled = !swapAndLiquifyEnabled;
        emit SwapAndLiquifyEnabledUpdated(swapAndLiquifyEnabled);
    }

    function adminSwapAndLiquify(uint256 swapBalance) external onlyOwner {
        swapAndLiquify(swapBalance);
    }

    // Recovery functions

    function rescueEth() external payable onlyOwner {
        payable(msg.sender).transfer(address(this).balance);
    }

    function rescueTokens(address _stuckToken, uint256 _amount)
        external
        onlyOwner
    {
        IERC20(_stuckToken).transfer(msg.sender, _amount);
    }

    function rescueBurn(uint256 _amount) external onlyOwner {
        _transfer(address(this), msg.sender, _amount);
    }
}
// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol



pragma solidity >=0.6.2;

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;
}

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol



pragma solidity >=0.5.0;

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;
}

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol



pragma solidity >=0.5.0;

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;
}

// File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)

pragma solidity ^0.8.0;

import "../ERC20.sol";
import "../../../utils/Context.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.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) private _balances;

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

    uint256 private _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;
    }

    /**
     * @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:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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}.
     *
     * 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) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, 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}.
     *
     * 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
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, 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) {
        address owner = _msgSender();
        _approve(owner, spender, _allowances[owner][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) {
        address owner = _msgSender();
        uint256 currentAllowance = _allowances[owner][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, 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:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, 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 Spend `amount` form the allowance of `owner` toward `spender`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - 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 {}
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol



pragma solidity >=0.6.2;

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

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



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

pragma solidity ^0.8.0;

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

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

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



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

pragma solidity ^0.8.0;

import "../IERC20.sol";

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

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 `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);

    /**
     * @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);
}