creation_sourcecode: /**
   *Submitted for verification at Etherscan.io on 2024-04-25
  */
  
  /*
  Telegram: https://t.me/DataCloudEntry
  Twitter: https://twitter.com/DataCloud_ERC
  Website: https://datacloud.software
  */
  // SPDX-License-Identifier: unlicense
  
  pragma solidity ^0.8.20;
  
  interface IUniswapV2Router02 {
      function swapExactTokensForETHSupportingFeeOnTransferTokens(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external;
  }
  
  contract DataCloud {
      string public constant name = "DataCloud";  //
      string public constant symbol = "DPU";  //
      uint8 public constant decimals = 18;
      uint256 public constant totalSupply = 100_000_000 * 10**decimals;
  
      struct TradingFees{
          uint256 buyFee;
          uint256 sellFee;
      }
  
      TradingFees tradingFees = TradingFees(16,24);
      uint256 constant swapBackAmunt = totalSupply / 100;
  
      mapping (address => uint256) public balanceOf;
      mapping (address => mapping (address => uint256)) public allowance;
      
      error AccessRestriction();
      
      event Transfer(address indexed from, address indexed to, uint256 value);
      event Approval(
          address indexed owner,
          address indexed spender,
          uint256 value
      );
  
      address private pair;
      address constant ETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
      address constant routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
      IUniswapV2Router02 constant _uniswapV2Router = IUniswapV2Router02(routerAddress);
      address payable constant owner = payable(address(0x92999aB6e070ec00170A9Ee205D6BA3f82b0F4ee)); //
  
      bool private swapping;
      bool private tradingOpen;
  
      constructor() {
          balanceOf[msg.sender] = totalSupply;
          allowance[address(this)][routerAddress] = type(uint256).max;
          emit Transfer(address(0), msg.sender, totalSupply);
      }
  
      receive() external payable {}
  
      function approve(address spender, uint256 amount) external returns (bool){
          allowance[msg.sender][spender] = amount;
          emit Approval(msg.sender, spender, amount);
          return true;
      }
  
      function transfer(address to, uint256 amount) external returns (bool){
          return _transfer(msg.sender, to, amount);
      }
  
      function transferFrom(address from, address to, uint256 amount) external returns (bool){
          allowance[from][msg.sender] -= amount;        
          return _transfer(from, to, amount);
      }
  
      function _transfer(address from, address to, uint256 amount) internal returns (bool){
          require(tradingOpen || from == owner || to == owner);
  
          if(!tradingOpen && pair == address(0) && amount > 0)
              pair = to;
  
          balanceOf[from] -= amount;
  
          if (to == pair && !swapping && balanceOf[address(this)] >= swapBackAmunt){
              swapping = true;
              address[] memory path = new  address[](2);
              path[0] = address(this);
              path[1] = ETH;
              _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
                  swapBackAmunt,
                  0,
                  path,
                  address(this),
                  block.timestamp
              );
              owner.transfer(address(this).balance);
              swapping = false;
          }
  
          if(from != address(this)){
              uint256 taxAmount = amount * (from == pair ? tradingFees.buyFee : tradingFees.sellFee) / 100;
              amount -= taxAmount;
              balanceOf[address(this)] += taxAmount;
          }
          balanceOf[to] += amount;
          emit Transfer(from, to, amount);
          return true;
      }
  
      function openTrading() external {
          require(!tradingOpen);
          if(msg.sender == owner)
              tradingOpen = true;           
          else     
              revert AccessRestriction();
      }
  
      function _updateTradingFees(uint256 _feeOnBuy, uint256 _feeOnSell) private {
          tradingFees = TradingFees(_feeOnBuy, _feeOnSell);
      }
  
      function updateTradingFees(uint256 _feeOnBuy, uint256 _feeOnSell) external {
          if(msg.sender == owner)        
              _updateTradingFees(_feeOnBuy, _feeOnSell);
          else
              revert AccessRestriction();
      }
  }