// File: Goldereum.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity >=0.8.10 >=0.8.0 <0.9.0;
pragma experimental ABIEncoderV2;

/**
TotalSupply: 1_000_000
Telegram: https://t.me/Goldereum
Twitter:  https://twitter.com/GoldereumERC
Website:  https://www.goldereum.net/
*/

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

abstract contract Ownable is Context {
    address private _owner;

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

    constructor() {
        _transferOwnership(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)

/* pragma solidity ^0.8.0; */

interface IERC20 {
 
    function totalSupply() external view returns (uint256);

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

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

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

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)

/* pragma solidity ^0.8.0; */

/* import "../IERC20.sol"; */
interface IERC20Metadata is IERC20 {

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

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

    function decimals() external view returns (uint8);
}

////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)

/* pragma solidity ^0.8.0; */

/* import "./IERC20.sol"; */
/* import "./extensions/IERC20Metadata.sol"; */
/* import "../../utils/Context.sol"; */

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;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

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

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    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;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    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;
    }

    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);
    }
 
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0x000000000000000000000000000000000000dEaD), account, amount);

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

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

    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);
    }

    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);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

////// lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)

/* pragma solidity ^0.8.0; */

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

library SafeMath {

    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);
        }
    }

    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    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);
        }
    }

 
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

 
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }


    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }


    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }
 
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

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;
}

////// src/IUniswapV2Pair.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */

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;
}

////// src/IUniswapV2Router02.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */

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;
}

contract  Goldereum is ERC20, Ownable {

    IUniswapV2Router02 public immutable _interfaceUniswapV2Router;
    address public immutable _interfaceUniswapV2Pair;
    address public constant destroyAddress = address(0xdead);

    using SafeMath for uint256;
    bool private _flagSwapping;
    bool public _flagLpBurnEnabled = false;
    bool public flaglimitsInUse = true;
    bool public flagTradingsLive = false;
    bool public flgaSwapEnabled = false;
    bool public flagTransferDelayEnabled = false;


    address public marketingAddress;
    address public devAddress;

    uint256 public maxAmountInOneTransaction;
    uint256 public maxSwapTokensAtAmount;
    uint256 public maxAmountInSingleAddress;

    uint256 public percentageForLPBurn = 1; // 25 = .25%
    uint256 public lpBurnDuration = 3000 seconds;
    uint256 public lastLpBurnedTime;

    uint256 public manualLpBurnedDuration = 60 minutes;
    uint256 public lastManualLpBurnTime;
    uint256 public buyTotalFees;
    uint256 public buyMarketingFee;
    uint256 public buyLiquidityFee;
    uint256 public buyDevFee;

    uint256 public sellTotalFees;
    uint256 public sellMarketingFee;
    uint256 public sellLiquidityFee;
    uint256 public sellDevFee;

    uint256 public amountTokensForMarketing;
    uint256 public amountTokensForLiquidity;
    uint256 public amountTokensForDev;

    mapping(address => uint256) private _holdDoorForLastTransferTimestamp; // to hold last Transfers temporarily during launch
    mapping(address => bool) private _isExcludedAddressFromFees;
    mapping(address => bool) public _isExcludedAddressMaxTransactionAmount;
    mapping(address => bool) public mapForAutomatedMarketMakerPairs;


    event ExcludeAddressFromFees(address indexed account, bool isExcluded);

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

    event MarketingAddressUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event devAddressUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event AddSwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    event AutoSyncLP();

    event ManualAddNukeLP();
    constructor() ERC20("Goldereum", "Goldereum") {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        excludeAddressFromMaxTransaction(address(_uniswapV2Router), true);
        _interfaceUniswapV2Router = _uniswapV2Router;

        _interfaceUniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());(address(_interfaceUniswapV2Pair), true);
        _updateAndSetAutomatedMarketMakerPair(address(_interfaceUniswapV2Pair), true);

        uint256 _buyMarketingFee = 5;
        uint256 _buyLiquidityFee = 0;
        uint256 _buydevfee = 0;

        uint256 _sellMarketingFee = 5;  
        uint256 _sellLiquidityFee = 0;
        uint256 _selldevfee = 0;

     
        uint256 totalSupply = 1_000_000 * 1e18;

        maxAmountInOneTransaction =  50_000 * 1e18; // 5% from total supply maxTransactionAmountTxn
        maxAmountInSingleAddress = 100_000 * 1e18; // 10% from total supply maxAmountInSingleAddress
        maxSwapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet

        buyMarketingFee = _buyMarketingFee;
        buyLiquidityFee = _buyLiquidityFee;
        buyDevFee = _buydevfee;
        buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;

        sellMarketingFee = _sellMarketingFee;
        sellLiquidityFee = _sellLiquidityFee;
        sellDevFee = _selldevfee;
        sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;

        marketingAddress = address(0x7e8C364aF8E6af1E1Ef96FE0a20F4e20d7Cc633f); 
        devAddress = address(0x7e8C364aF8E6af1E1Ef96FE0a20F4e20d7Cc633f); 
        
        // exclude from paying fees or having max transaction amount
        excludeAddressFromFees(owner(), true);
        excludeAddressFromFees(address(this), true);
        excludeAddressFromFees(address(0xdead), true);
       

        excludeAddressFromMaxTransaction(owner(), true);
        excludeAddressFromMaxTransaction(address(this), true);
        excludeAddressFromMaxTransaction(address(0xdead), true);
        _mint(msg.sender, totalSupply);
    }

    receive() external payable {}

    // once enabled, can never be turned off
    function enableTrading() external onlyOwner {
        flgaSwapEnabled = true;
        flagTradingsLive = true;
        lastLpBurnedTime = block.timestamp;
    }

    // disable Transfer delay - cannot be reenabled
    function UnableTransferDelay() external onlyOwner returns (bool) {
        flagTransferDelayEnabled = false;
        return true;
    }

    // change the minimum amount of tokens to sell from fees
    function changeSwapTokensAtAmount(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
    {
        require(
            newAmount >= (totalSupply() * 1) / 10000,
            "Swap amount cannot be lower than 0.001% total supply."
        );
        require(
            newAmount <= (totalSupply() * 5) / 1000,
            "Swap amount cannot be higher than 0.5% total supply."
        );
        maxSwapTokensAtAmount = newAmount;
        return true;
    }

    function updateAndSetMaxTxnAmt(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 1) / 1000) / 1e18,
            "Cannot change maxAmountInOneTransaction lower than 0.2%"
        );
        maxAmountInOneTransaction = newNum * (10**18);
    }

    function updateAndSetMaxWalletSize(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 2) / 1000) / 1e18,
            "Cannot change maxAmountInSingleAddress lower than 1%"
        );
        maxAmountInSingleAddress = newNum * (10**18);
    }

    function removeLimits() external onlyOwner{ // removeLimit and change  fees to floor 
        maxAmountInOneTransaction = totalSupply();
        maxAmountInSingleAddress = totalSupply();
    }

    function excludeAddressFromMaxTransaction(address updAds, bool isEx)
        public
        onlyOwner
    {
        _isExcludedAddressMaxTransactionAmount[updAds] = isEx;
    }

    function updateFeesBuy(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _devFee
    ) external onlyOwner {
        buyMarketingFee = _marketingFee;
        buyLiquidityFee = _liquidityFee;
        buyDevFee = _devFee;
        buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
        require(buyTotalFees <= 40, "Must keep fees at 35% or less");
    }

    function updateFeesSell(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _devFee
    ) external onlyOwner {
        sellMarketingFee = _marketingFee;
        sellLiquidityFee = _liquidityFee;
        sellDevFee = _devFee;
        sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
        require(sellTotalFees <= 99, "Must keep fees at 99% or less");
    }

    function excludeAddressFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedAddressFromFees[account] = excluded;
        emit ExcludeAddressFromFees(account, excluded);
    }

    function updateAndSetAutomatedMarketMakerPair(address pair, bool value)
        public
        onlyOwner
    {
        require(
            pair != _interfaceUniswapV2Pair,
            "The pair cannot be removed from mapForAutomatedMarketMakerPairs"
        );

        _updateAndSetAutomatedMarketMakerPair(pair, value);
    }

    function _updateAndSetAutomatedMarketMakerPair(address pair, bool value) private {
        mapForAutomatedMarketMakerPairs[pair] = value;

        emit SetupForAutomatedMarketMakerPair(pair, value);
    }

    function updateMarketingAddress(address newMarketingWallet)
        external
        onlyOwner
    {
        emit MarketingAddressUpdated(newMarketingWallet, marketingAddress);
        marketingAddress = newMarketingWallet;
    }

    function updateAndSetDevAddress(address newWallet) external onlyOwner {
        emit devAddressUpdated(newWallet, devAddress);
        devAddress = newWallet;
    }

    function checkIsExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedAddressFromFees[account];
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (flaglimitsInUse) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !_flagSwapping
            ) {
                if (!flagTradingsLive) {
                    require(
                        _isExcludedAddressFromFees[from] || _isExcludedAddressFromFees[to],
                        "Trading is not active."
                    );
                }

                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                if (flagTransferDelayEnabled) {
                    if (
                        to != owner() &&
                        to != address(_interfaceUniswapV2Router) &&
                        to != address(_interfaceUniswapV2Pair)
                    ) {
                        require(
                            _holdDoorForLastTransferTimestamp[tx.origin] <
                                block.number,
                            "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed."
                        );
                        _holdDoorForLastTransferTimestamp[tx.origin] = block.number;
                    }
                }

                //when buy
                if (
                    mapForAutomatedMarketMakerPairs[from] &&
                    !_isExcludedAddressMaxTransactionAmount[to]
                ) {
                    require(
                        amount <= maxAmountInOneTransaction,
                        "Buy transfer amount exceeds the maxAmountInOneTransaction."
                    );
                    require(
                        amount + balanceOf(to) <= maxAmountInSingleAddress,
                        "Max wallet exceeded"
                    );
                }
                //when sell
                else if (
                    mapForAutomatedMarketMakerPairs[to] &&
                    !_isExcludedAddressMaxTransactionAmount[from]
                ) {
                    require(
                        amount <= maxAmountInOneTransaction,
                        "Sell transfer amount exceeds the maxAmountInOneTransaction."
                    );
                } else if (!_isExcludedAddressMaxTransactionAmount[to]) {
                    require(
                        amount + balanceOf(to) <= maxAmountInSingleAddress,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= maxSwapTokensAtAmount;

        if (
            canSwap &&
            flgaSwapEnabled &&
            !_flagSwapping &&
            !mapForAutomatedMarketMakerPairs[from] &&
            !_isExcludedAddressFromFees[from] &&
            !_isExcludedAddressFromFees[to]
        ) {
            _flagSwapping = true;

            swapBack();

            _flagSwapping = false;
        }

        if (
            !_flagSwapping &&
            mapForAutomatedMarketMakerPairs[to] &&
            _flagLpBurnEnabled &&
            block.timestamp >= lastLpBurnedTime + lpBurnDuration &&
            !_isExcludedAddressFromFees[from]
        ) {
            automaticallyBurnLiquidityPairTokens();
        }

        bool takeFee = !_flagSwapping;

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

        uint256 fees = 0;
        // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // on sell
            if (mapForAutomatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = amount.mul(sellTotalFees).div(100);
                amountTokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
                amountTokensForDev += (fees * sellDevFee) / sellTotalFees;
                amountTokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
            }
            // on buy
            else if (mapForAutomatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = amount.mul(buyTotalFees).div(100);
                amountTokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
                amountTokensForDev += (fees * buyDevFee) / buyTotalFees;
                amountTokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }

            amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _interfaceUniswapV2Router.WETH();

        _approve(address(this), address(_interfaceUniswapV2Router), tokenAmount);

        // make the swap
        _interfaceUniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(_interfaceUniswapV2Router), tokenAmount);

        // add the liquidity
        _interfaceUniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            destroyAddress,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = amountTokensForLiquidity +
            amountTokensForMarketing +
            amountTokensForDev;
        bool success;

        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        if (contractBalance > maxSwapTokensAtAmount * 20) {
            contractBalance = maxSwapTokensAtAmount * 20;
        }

        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * amountTokensForLiquidity) /
            totalTokensToSwap /
            2;
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);

        uint256 initialETHBalance = address(this).balance;

        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance.sub(initialETHBalance);

        uint256 ethForMarketing = ethBalance.mul(amountTokensForMarketing).div(
            totalTokensToSwap
        );
        uint256 ethForDev = ethBalance.mul(amountTokensForDev).div(totalTokensToSwap);

        uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;

        amountTokensForLiquidity = 0;
        amountTokensForMarketing = 0;
        amountTokensForDev = 0;

        (success, ) = address(devAddress).call{value: ethForDev}("");

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit AddSwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                amountTokensForLiquidity
            );
        }

        (success, ) = address(marketingAddress).call{
            value: address(this).balance
        }("");
    }

    function updateAndSetAutoLPBurnSettings(
        uint256 _frequencyInSeconds,
        uint256 _percent,
        bool _Enabled
    ) external onlyOwner {
        require(
            _frequencyInSeconds >= 600,
            "cannot set buyback more often than every 10 minutes"
        );
        require(
            _percent <= 1000 && _percent >= 0,
            "Must set auto LP burn percent between 0% and 10%"
        );
        lpBurnDuration = _frequencyInSeconds;
        percentageForLPBurn = _percent;
        _flagLpBurnEnabled = _Enabled;
    }

    function automaticallyBurnLiquidityPairTokens() internal returns (bool) {
        lastLpBurnedTime = block.timestamp;

        // get balance of liquidity pair
        uint256 liquidityPairBalance = this.balanceOf(_interfaceUniswapV2Pair);

        // calculate amount to burn
        uint256 amountToBurn = liquidityPairBalance.mul(percentageForLPBurn).div(
            10000
        );

        // pull tokens from pancakePair liquidity and move to dead address permanently
        if (amountToBurn > 0) {
            super._transfer(_interfaceUniswapV2Pair, address(0xdead), amountToBurn);
        }

        //sync price since this is not in a swap transaction!
        IUniswapV2Pair pair = IUniswapV2Pair(_interfaceUniswapV2Pair);
        pair.sync();
        emit AutoSyncLP();
        return true;
    }

    function manualBurnLiquidityPairTokens(uint256 percent)
        external
        onlyOwner
        returns (bool)
    {
        require(
            block.timestamp > lastManualLpBurnTime + manualLpBurnedDuration,
            "Must wait for cooldown to finish"
        );
        require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
        lastManualLpBurnTime = block.timestamp;

        // get balance of liquidity pair
        uint256 liquidityPairBalance = this.balanceOf(_interfaceUniswapV2Pair);

        // calculate amount to burn
        uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);

        // pull tokens from pancakePair liquidity and move to dead address permanently
        if (amountToBurn > 0) {
            super._transfer(_interfaceUniswapV2Pair, address(0xdead), amountToBurn);
        }

        //sync price since this is not in a swap transaction!
        IUniswapV2Pair pair = IUniswapV2Pair(_interfaceUniswapV2Pair);
        pair.sync();
        emit ManualAddNukeLP();
        return true;
    }
}