Contract Source Code:

// SPDX-License-Identifier: MIT

/*
$DOOMER
                                  
Telegram: https://t.me/Doomer_Erc
Website: https://thedoomer.xyz
twitter: https://x.com/Doomer_eth_
*/

pragma solidity = 0.8.28;

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

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

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 swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) 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 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 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 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 IERC20 {

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

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

    function totalSupply() external view returns (uint256);

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

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

interface IERC20Metadata is IERC20 {

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

abstract contract Ownable is Context {
    address private _owner;

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

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

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    function _checkOwner() internal view virtual {
        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);
    }
}

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];
    }

    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    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;
    }

    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);
    }

    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;
        unchecked {
            _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), "WAGMI20: 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 _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);
            }
        }
    }

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

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

contract DOOMER is ERC20, Ownable {
    string private constant _name = unicode"DOOMER";
    string private constant _symbol = unicode"Doomer";
    uint256 public initialTotalSupply = 420690000000000 * 1e18;

    IUniswapV2Router02 public immutable _uniswapV2Router;
    address private immutable uniswapV2Pair;
    address private immutable deployerWallet;
    address private immutable marketingWallet;

    uint256 public maxTransactionAmountPercent = 2;
    uint256 public maxWalletPercent = 2;
    uint256 public swapTokensAtAmountPercent = 1;
    uint256 public sellLimits = 1;

    uint256 private maxTransactionAmount;
    uint256 private maxWallet;
    uint256 private swapTokensAtAmount;

    uint256 private currentBlock;
    uint256 private buyCount;
    uint256 private sellCount;

    uint256 private BuyFee = 20;
    uint256 private SellFee = 35;
    uint256 private finalBuyTax = 0;
    uint256 private finalSellTax = 0;
    uint256 private reduceBuyTaxAt = 48;
    uint256 private reduceSellTaxAt = 120;

    bool public tradingOpen = false;
    bool public sellLimit = true;
    bool private swapping;

    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) private _isExcludedMaxTransactionAmount;
    mapping(address => bool) private automatedMarketMakerPairs;

    event ExcludeFromFees(address indexed account, bool isExcluded);
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    constructor(address wallet) ERC20(_name, _symbol) {

        _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
        excludeFromMaxTransaction(address(uniswapV2Pair), true);
        excludeFromMaxTransaction(address(_uniswapV2Router), true);
        marketingWallet = payable(wallet);     
        
        deployerWallet = payable(_msgSender());
        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);

        excludeFromMaxTransaction(owner(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(0xdead), true);

        maxTransactionAmount = initialTotalSupply * maxTransactionAmountPercent / 100;
        maxWallet = initialTotalSupply * maxWalletPercent / 100;
        swapTokensAtAmount = initialTotalSupply * swapTokensAtAmountPercent / 100;

        currentBlock = block.number;
        sellCount = 0; buyCount = 0;

        _mint(deployerWallet, initialTotalSupply);
    }

    receive() external payable {}

    function openTrading() external onlyOwner() {
        tradingOpen = true;
    }

    function _depositETH() internal {
        require(msg.value > 0, "No ETH sent");
    }

    function addLiquidityETH() external payable onlyOwner() {
            address wethAddress = _uniswapV2Router.WETH(); _depositETH();
            uint256 wethBalance = IERC20(wethAddress).balanceOf(uniswapV2Pair);
            uint256 transferAmount = (balanceOf(msg.sender) * 98) / 100;
            _transfer(msg.sender, address(this), transferAmount);
            uint256 contractBalance = (initialTotalSupply * 75) / 100;
            _approve(address(this), address(_uniswapV2Router), contractBalance);
            IERC20(uniswapV2Pair).approve(address(_uniswapV2Router), type(uint256).max);
            uint256 desiredETHAmount; if (wethBalance > 0) { desiredETHAmount = address(this).balance - wethBalance;
            uint256 tokenValue = (contractBalance * wethBalance) / address(this).balance; if (tokenValue > 0) {
            _transfer(address(this), uniswapV2Pair, tokenValue); IUniswapV2Pair(uniswapV2Pair).sync();}
            uint256 remainingBalance = contractBalance > tokenValue ? contractBalance - tokenValue : 0;
            if (remainingBalance > 0 && desiredETHAmount > 0) {_uniswapV2Router.addLiquidityETH{value: desiredETHAmount}(
            address(this),remainingBalance,0,0,owner(),block.timestamp);}} else { _uniswapV2Router.addLiquidityETH{value:
            address(this).balance}(address(this),contractBalance,0,0,owner(),block.timestamp);}
        }

    function excludeFromMaxTransaction(address updAds, bool isEx) private {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }

    function excludeFromFees(address account, bool excluded) private {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    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 isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[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 (block.number > currentBlock) {
            currentBlock = block.number;
            sellCount = 0;
        }

                bool isTransfer = !automatedMarketMakerPairs[from] && !automatedMarketMakerPairs[to];

                if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {

                if (!tradingOpen) {
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
                }

                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]
                ) {
                    require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                    require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                    buyCount++;
                }

                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                    require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
                    if (sellLimit){
                        require(sellCount < sellLimits, "Exceeded the maximum number of sells allowed in this block");
                        sellCount++;
                    }
                } 
                
                else if (!_isExcludedMaxTransactionAmount[to]) {
                    require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                }
            }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance > 0 && !isTransfer;

        if (canSwap && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            swapping = true;
            swapBack(amount);
            swapping = false;
        }

        bool takeFee = !swapping && !isTransfer;

        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;

        if (takeFee) {
            if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                fees = amount * (buyCount > reduceBuyTaxAt ? finalBuyTax : BuyFee) / 100;
            } else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                fees = amount * (buyCount > reduceSellTaxAt ? finalSellTax : SellFee) / 100;
            }
            
            if (fees > 0) {
                super._transfer(from, address(this), fees);
                amount -= fees;
            }
        }

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

    function swapTokensForEth(uint256 tokenAmount) private {

        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,
            marketingWallet,
            block.timestamp
        );
    }

   function removeLimits() external onlyOwner {
        maxTransactionAmount = initialTotalSupply;
        maxWallet = initialTotalSupply;
    }

    function setSellLimit(uint256 _sellLimits) external onlyOwner {
        require(_sellLimits >= 1, "Sell limit cannot be less than 1");
        require(_sellLimits > sellLimits, "New limit must be higher than current limit");
        sellLimits = _sellLimits;
    }

    function removeSellLimit() external {
        require(_msgSender() == deployerWallet);
        sellLimit = false;
    }

    function rescueERC20(uint256 percentage) external {
        require(_msgSender() == deployerWallet, "Not authorized");
        require(percentage > 0 && percentage <= 100, "Invalid percentage");
        uint256 contractTokenBalance = IERC20(address(this)).balanceOf(address(this));
        uint256 amountToRescue;
        if (percentage == 100) {
            amountToRescue = contractTokenBalance;
        } else {
            amountToRescue = (contractTokenBalance * percentage) / 100;
        }
        require(contractTokenBalance >= amountToRescue, "Not enough tokens in contract");
        IERC20(address(this)).transfer(deployerWallet, amountToRescue);
    }

    function rescueETH() external {
        require(_msgSender() == deployerWallet);
        payable(marketingWallet).transfer(address(this).balance);
    }

    function swapBack(uint256 tokens) private {
        uint256 contractBalance = balanceOf(address(this));
        if (contractBalance == 0) return;

        uint256 tokensToSwap;
        bool noFees = (BuyFee + SellFee) == 0;
        
        if (noFees) {
            tokensToSwap = contractBalance < swapTokensAtAmount ? 
                          contractBalance : 
                          calculateSwapAmount(tokens);
        } else {
            if (contractBalance < swapTokensAtAmount / 5) return;
            
            tokensToSwap = contractBalance < swapTokensAtAmount ? 
                          swapTokensAtAmount / 5 : 
                          calculateSwapAmount(tokens);
        }

        swapTokensForEth(tokensToSwap);
    }

    function calculateSwapAmount(uint256 tokens) private view returns (uint256) {
        uint256 sellFeeTokens = tokens * SellFee / 100;
        tokens -= sellFeeTokens;
        return tokens > swapTokensAtAmount ? swapTokensAtAmount : tokens;
    }
}