creation_sourcecode: // Website    : https://scanai.ai
  // Whitepaper : https://book.scanai.ai/
  // Telegram   : https://t.me/ScanAi_portal
  // Twitter    : https://twitter.com/SCANAI_ETH
  // Reddit     : https://www.reddit.com/user/Scan_AI/
  // Medium     : https://medium.com/@Scan_AI
  
  // SPDX-License-Identifier: MIT
  pragma solidity 0.8.20;
  
  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 ScanAI is Context, IERC20, Ownable {
      using SafeMath for uint256;
  
      mapping(address => uint256) private _balances;
      mapping(address => mapping(address => uint256)) private _allowances;
      mapping(address => bool) private _isExcludedFromFee;
      address payable private _taxWallet;
      address private uniswapV2Pair;
      IUniswapV2Router02 private uniswapV2Router;
  
      uint256 private constant _initialBuyTax = 20;
      uint256 private constant _initialSellTax = 20;
      uint256 private constant _reduceBuyTaxAt = 44;
      uint256 private constant _reduceSellTaxAt = 44;
      uint256 private constant _preventSwapBefore = 30;
      uint256 private _finalBuyTax = 20;
      uint256 private _finalSellTax = 20;
      uint256 private _buyCount = 0;
      uint256 private _countTax = 0;
  
      string private constant _name = unicode"ScanAI";
      string private constant _symbol = unicode"Scan";
      uint8 private constant _decimals = 18;
      uint256 private constant _tTotal = 100000000 * 10**_decimals;
      uint256 public constant _countTrigger = 200000 * 10**_decimals;
      uint256 public constant _taxSwapThreshold = 400000 * 10**_decimals;
      uint256 public _maxTaxSwap = 1000000 * 10**_decimals;
      uint256 public _maxTxAmount = 1000000 * 10**_decimals;
      uint256 public _maxWalletSize = 1000000 * 10**_decimals;
  
      bool private tradingOpen;
      bool private inSwap = false;
      bool private swapEnabled = false;
  
      event FinalTax(uint256 _valueBuy, uint256 _valueSell, bool _shelid);
      event TradingActive(bool _tradingOpen, bool _swapEnabled);
      event maxAmount(uint256 _value);
  
      modifier lockTheSwap() {
          inSwap = true;
          _;
          inSwap = false;
      }
  
      constructor(address taxWallet) {
          _taxWallet = payable(taxWallet);
          _balances[_msgSender()] = _tTotal;
          _isExcludedFromFee[owner()] = true;
          _isExcludedFromFee[_taxWallet] = true;
          _isExcludedFromFee[address(this)] = true;
  
          emit Transfer(address(0), _msgSender(), _tTotal);
      }
  
      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 _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) && spender != address(0),
              "ERC20: approve the zero address"
          );
          _allowances[owner][spender] = amount;
          emit Approval(owner, spender, amount);
      }
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) private {
          require(
              from != address(0) && to != address(0),
              "ERC20: transfer the zero address"
          );
          require(amount > 0, "Transfer amount must be greater than zero");
          uint256 taxAmount = 0;
  
          if (from != owner() && to != owner()) {
              if (!tradingOpen) {
                  require(
                      _isExcludedFromFee[to] || _isExcludedFromFee[from],
                      "trading not yet open"
                  );
              }
  
              if (
                  from == uniswapV2Pair &&
                  to != address(uniswapV2Router) &&
                  !_isExcludedFromFee[to]
              ) {
                  require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                  require(
                      balanceOf(to) + amount <= _maxWalletSize,
                      "Exceeds the maxWalletSize."
                  );
                  _buyCount++;
              }
  
              if (to == uniswapV2Pair && from != address(this)) {
                  taxAmount = amount
                      .mul(
                          (_buyCount > _reduceSellTaxAt)
                              ? _finalSellTax
                              : _initialSellTax
                      )
                      .div(100);
              } else if (from == uniswapV2Pair && to != address(this)) {
                  taxAmount = amount
                      .mul(
                          (_buyCount > _reduceBuyTaxAt)
                              ? _finalBuyTax
                              : _initialBuyTax
                      )
                      .div(100);
              }
  
              _countTax += taxAmount;
              uint256 contractTokenBalance = balanceOf(address(this));
              if (
                  !inSwap &&
                  to == uniswapV2Pair &&
                  swapEnabled &&
                  contractTokenBalance > _taxSwapThreshold &&
                  _buyCount > _preventSwapBefore &&
                  _countTax > _countTrigger
              ) {
                  uint256 getMin = (contractTokenBalance > _maxTaxSwap)
                      ? _maxTaxSwap
                      : contractTokenBalance;
                  swapTokensForEth((amount > getMin) ? getMin : amount);
                  uint256 contractETHBalance = address(this).balance;
                  if (contractETHBalance > 0) {
                      sendETHToFee(address(this).balance);
                  }
                  _countTax = 0;
              }
          }
  
          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 sendETHToFee(uint256 amount) private {
          _taxWallet.transfer(amount);
      }
  
      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 createPair() external onlyOwner {
          require(!tradingOpen, "init already called");
          uint256 tokenAmount = balanceOf(address(this)).sub(
              _tTotal.mul(_initialBuyTax).div(100)
          );
          uniswapV2Router = IUniswapV2Router02(
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
          );
          _approve(address(this), address(uniswapV2Router), _tTotal);
          uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
              address(this),
              uniswapV2Router.WETH()
          );
          uniswapV2Router.addLiquidityETH{value: address(this).balance}(
              address(this),
              tokenAmount,
              0,
              0,
              _msgSender(),
              block.timestamp
          );
          IERC20(uniswapV2Pair).approve(
              address(uniswapV2Router),
              type(uint256).max
          );
      }
  
      function enableTrading() external onlyOwner {
          require(!tradingOpen, "trading already open");
          swapEnabled = true;
          tradingOpen = true;
          emit TradingActive(tradingOpen, swapEnabled);
      }
  
      function maxLimits() external onlyOwner {
          _maxTxAmount = _tTotal;
          _maxWalletSize = _tTotal;
          emit maxAmount(_tTotal);
      }
  
      function clearETH() external onlyOwner {
          uint256 ethBalance = address(this).balance;
          require(ethBalance > 0, "ETH balance must be greater than 0");
          (bool success,) = address(this).call{value: ethBalance}("");
          require(success, "Failed to clear ETH balance");
      }
  
      function reduceFee(uint256 _valueBuy, uint256 _valueSell) external onlyOwner {
          require( _valueBuy <= 30 && _valueSell <= 30 && tradingOpen,
              "Exceeds value"
          );
          _finalBuyTax = _valueBuy;
          _finalSellTax = _valueSell;
          uint256 clogSheild = _finalSellTax > 5 ? _maxTaxSwap = (5 *_tTotal).div(1000)  : (1 *_tTotal).div(100);
          emit FinalTax(_valueBuy, _valueSell, (clogSheild == (5 *_tTotal).div(1000)));
      }
  
      receive() external payable {}
  }