creation_sourcecode: /*
  Devin AI $DEVIN
  Introducing Devin, the first AI software engineer
  
  Meet Devin, the world’s first fully autonomous AI software engineer.
  ‍
  Devin is a tireless, skilled teammate, equally ready to build alongside you or independently complete tasks for you to review.
  
  With Devin, engineers can focus on more interesting problems and engineering teams can strive for more ambitious goals.
  
  https://www.cognition-labs.com/introducing-devin
  */
  // SPDX-License-Identifier: MIT
  
  pragma solidity ^0.8.18;
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes calldata) {
          return msg.data;
      }
  }
  
  abstract contract Ownable is Context {
      address private _owner;
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
      constructor() {
          _transferOwnership(_msgSender());
      }
  
      function owner() public view virtual returns (address) {
          return _owner;
      }
  
      modifier onlyOwner() {
          require(owner() == _msgSender(), "Ownable: caller is not the owner");
          _;
      }
  
      function renounceOwnership() public virtual onlyOwner {
          _transferOwnership(address(0));
      }
  
      function transferOwnership(address newOwner) public virtual onlyOwner {
          require(newOwner != address(0), "Ownable: new owner is the zero address");
          _transferOwnership(newOwner);
      }
  
      function _transferOwnership(address newOwner) internal virtual {
          address oldOwner = _owner;
          _owner = newOwner;
          emit OwnershipTransferred(oldOwner, newOwner);
      }
  }
  
  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);
  }
  
  interface IERC20Metadata is IERC20 {
  
      function name() external view returns (string memory);
  
      function symbol() external view returns (string memory);
  
      function decimals() external view returns (uint8);
  }
  
  contract ERC20 is Context, IERC20, IERC20Metadata {
      mapping(address => uint256) private _balances;
  
      mapping(address => mapping(address => uint256)) private _allowances;
  
      uint256 private _totalSupply;
  
      string private _name;
      string private _symbol;
  
      constructor(string memory name_, string memory symbol_) {
          _name = name_;
          _symbol = symbol_;
      }
  
      function name() public view virtual override returns (string memory) {
          return _name;
      }
  
      function symbol() public view virtual override returns (string memory) {
          return _symbol;
      }
  
      function decimals() public view virtual override returns (uint8) {
          return 18;
      }
  
      function totalSupply() public view virtual override returns (uint256) {
          return _totalSupply;
      }
  
      function balanceOf(address account) public view virtual override returns (uint256) {
          return _balances[account];
      }
  
      function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
          _transfer(_msgSender(), recipient, amount);
          return true;
      }
  
      function allowance(address owner, address spender) public view virtual override returns (uint256) {
          return _allowances[owner][spender];
      }
  
      function approve(address spender, uint256 amount) public virtual override returns (bool) {
          _approve(_msgSender(), spender, amount);
          return true;
      }
  
      function transferFrom(
          address sender,
          address recipient,
          uint256 amount
      ) public virtual override returns (bool) {
          _transfer(sender, recipient, amount);
  
          uint256 currentAllowance = _allowances[sender][_msgSender()];
          require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
          unchecked {
              _approve(sender, _msgSender(), currentAllowance - amount);
          }
  
          return true;
      }
  
      function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
          _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
          return true;
      }
  
      function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
          uint256 currentAllowance = _allowances[_msgSender()][spender];
          require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
          unchecked {
              _approve(_msgSender(), spender, currentAllowance - subtractedValue);
          }
  
          return true;
      }
  
      function _transfer(
          address sender,
          address recipient,
          uint256 amount
      ) internal virtual {
          require(sender != address(0), "ERC20: transfer from the zero address");
          require(recipient != address(0), "ERC20: transfer to the zero address");
  
          _beforeTokenTransfer(sender, recipient, amount);
  
          uint256 senderBalance = _balances[sender];
          require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
          unchecked {
              _balances[sender] = senderBalance - amount;
          }
          _balances[recipient] += amount;
  
          emit Transfer(sender, recipient, amount);
  
          _afterTokenTransfer(sender, recipient, amount);
      }
  
      function _mint(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: mint to the zero address");
  
          _beforeTokenTransfer(address(0), account, amount);
  
          _totalSupply += amount;
          _balances[account] += amount;
          emit Transfer(address(0), account, amount);
  
          _afterTokenTransfer(address(0), account, amount);
      }
  
      function _burn(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: burn from the zero address");
  
          _beforeTokenTransfer(account, address(0), amount);
  
          uint256 accountBalance = _balances[account];
          require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
          unchecked {
              _balances[account] = accountBalance - amount;
          }
          _totalSupply -= amount;
  
          emit Transfer(account, address(0), amount);
  
          _afterTokenTransfer(account, address(0), amount);
      }
  
      function _approve(
          address owner,
          address spender,
          uint256 amount
      ) internal virtual {
          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 _beforeTokenTransfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {}
  
      function _afterTokenTransfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {}
  }
  
  library SafeMath {
  
      function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          unchecked {
              uint256 c = a + b;
              if (c < a) return (false, 0);
              return (true, c);
          }
      }
  
      function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          unchecked {
              if (b > a) return (false, 0);
              return (true, a - b);
          }
      }
  
      function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          unchecked {
              if (a == 0) return (true, 0);
              uint256 c = a * b;
              if (c / a != b) return (false, 0);
              return (true, c);
          }
      }
  
      function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          unchecked {
              if (b == 0) return (false, 0);
              return (true, a / b);
          }
      }
  
      function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          unchecked {
              if (b == 0) return (false, 0);
              return (true, a % b);
          }
      }
  
      function add(uint256 a, uint256 b) internal pure returns (uint256) {
          return a + b;
      }
  
      function sub(uint256 a, uint256 b) internal pure returns (uint256) {
          return a - b;
      }
  
      function mul(uint256 a, uint256 b) internal pure returns (uint256) {
          return a * b;
      }
  
      function div(uint256 a, uint256 b) internal pure returns (uint256) {
          return a / b;
      }
  
      function mod(uint256 a, uint256 b) internal pure returns (uint256) {
          return a % b;
      }
  
      function sub(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          unchecked {
              require(b <= a, errorMessage);
              return a - b;
          }
      }
  
      function div(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          unchecked {
              require(b > 0, errorMessage);
              return a / b;
          }
      }
  
      function mod(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          unchecked {
              require(b > 0, errorMessage);
              return a % b;
          }
      }
  }
  
  interface IUniswapV2Factory {
      event PairCreated(
          address indexed token0,
          address indexed token1,
          address pair,
          uint256
      );
  
      function feeTo() external view returns (address);
  
      function feeToSetter() external view returns (address);
  
      function getPair(address tokenA, address tokenB)
          external
          view
          returns (address pair);
  
      function allPairs(uint256) external view returns (address pair);
  
      function allPairsLength() external view returns (uint256);
  
      function createPair(address tokenA, address tokenB)
          external
          returns (address pair);
  
      function setFeeTo(address) external;
  
      function setFeeToSetter(address) external;
  }
  
  interface IUniswapV2Pair {
      event Approval(
          address indexed owner,
          address indexed spender,
          uint256 value
      );
      event Transfer(address indexed from, address indexed to, uint256 value);
  
      function name() external pure returns (string memory);
  
      function symbol() external pure returns (string memory);
  
      function decimals() external pure returns (uint8);
  
      function totalSupply() external view returns (uint256);
  
      function balanceOf(address owner) external view returns (uint256);
  
      function allowance(address owner, address spender)
          external
          view
          returns (uint256);
  
      function approve(address spender, uint256 value) external returns (bool);
  
      function transfer(address to, uint256 value) external returns (bool);
  
      function transferFrom(
          address from,
          address to,
          uint256 value
      ) external returns (bool);
  
      function DOMAIN_SEPARATOR() external view returns (bytes32);
  
      function PERMIT_TYPEHASH() external pure returns (bytes32);
  
      function nonces(address owner) external view returns (uint256);
  
      function permit(
          address owner,
          address spender,
          uint256 value,
          uint256 deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external;
  
      event Mint(address indexed sender, uint256 amount0, uint256 amount1);
      event Burn(
          address indexed sender,
          uint256 amount0,
          uint256 amount1,
          address indexed to
      );
      event Swap(
          address indexed sender,
          uint256 amount0In,
          uint256 amount1In,
          uint256 amount0Out,
          uint256 amount1Out,
          address indexed to
      );
      event Sync(uint112 reserve0, uint112 reserve1);
  
      function MINIMUM_LIQUIDITY() external pure returns (uint256);
  
      function factory() external view returns (address);
  
      function token0() external view returns (address);
  
      function token1() external view returns (address);
  
      function getReserves()
          external
          view
          returns (
              uint112 reserve0,
              uint112 reserve1,
              uint32 blockTimestampLast
          );
  
      function price0CumulativeLast() external view returns (uint256);
  
      function price1CumulativeLast() external view returns (uint256);
  
      function kLast() external view returns (uint256);
  
      function mint(address to) external returns (uint256 liquidity);
  
      function burn(address to)
          external
          returns (uint256 amount0, uint256 amount1);
  
      function swap(
          uint256 amount0Out,
          uint256 amount1Out,
          address to,
          bytes calldata data
      ) external;
  
      function skim(address to) external;
  
      function sync() external;
  
      function initialize(address, address) external;
  }
  
  interface IUniswapV2Router02 {
      function factory() external pure returns (address);
  
      function WETH() external pure returns (address);
  
      function addLiquidity(
          address tokenA,
          address tokenB,
          uint256 amountADesired,
          uint256 amountBDesired,
          uint256 amountAMin,
          uint256 amountBMin,
          address to,
          uint256 deadline
      )
          external
          returns (
              uint256 amountA,
              uint256 amountB,
              uint256 liquidity
          );
  
      function addLiquidityETH(
          address token,
          uint256 amountTokenDesired,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline
      )
          external
          payable
          returns (
              uint256 amountToken,
              uint256 amountETH,
              uint256 liquidity
          );
  
      function swapExactTokensForTokensSupportingFeeOnTransferTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external;
  
      function swapExactETHForTokensSupportingFeeOnTransferTokens(
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external payable;
  
      function swapExactTokensForETHSupportingFeeOnTransferTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external;
  }
  
  contract DEVIN is ERC20, Ownable {
      using SafeMath for uint256;
  
      IUniswapV2Router02 public immutable uniswapV2Router;
      address public uniswapV2Pair;
      address public constant deadAddress = address(0xdead);
  
      bool private swapping;
  
      address public marketerWallet;
      address public DevsWallet;
  
      uint256 public maxTx;
      uint256 public swapTokensAtAmount;
      uint256 public maxWallets;
  
      bool public limitsInEffect = true;
      bool public tradingActive = false;
      bool public swapEnabled = false;
  
      // Anti-bot and anti-whale mappings and variables
      mapping(address => uint256) private _holderLastTransferTimestamp;
      bool public transferDelayEnabled = true;
  
      uint256 public buyTotalFees;
      uint256 public buyMarketingFee;
      uint256 public buyDevFee;
  
      uint256 public sellTotalFees;
      uint256 public sellMarketingFee;
      uint256 public sellDevFee;
  
      uint256 public tokensForMarkets;
      uint256 public tokensForDev;
  
      mapping(address => bool) private _isBlackList;
      mapping(address => bool) private _isExcludedFromFees;
      mapping(address => bool) public _isExcludedmaxTx;
  
      mapping(address => bool) public automatedMarketMakerPairs;
  
      event UpdateUniswapV2Router(
          address indexed newAddress,
          address indexed oldAddress
      );
  
      event ExcludeFromFees(address indexed account, bool isExcluded);
  
      event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
  
      event marketerWalletUpdated(
          address indexed newWallet,
          address indexed olDevsWalletallet
      );
  
      event DevsWalletUpdated(
          address indexed newWallet,
          address indexed olDevsWalletallet
      );
  
      constructor() ERC20("Devin AI", unicode"DEVIN") {
          IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
  
          excludeFrommaxTx(address(_uniswapV2Router), true);
          uniswapV2Router = _uniswapV2Router;
  
          uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
          excludeFrommaxTx(address(uniswapV2Pair), true);
          _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
  
          uint256 _buyMarketingFee = 20;
          uint256 _buyDevFee = 0;
  
          uint256 _sellMarketingFee = 20;
          uint256 _sellDevFee = 0;
  
          uint256 totalSupply = 1_000_000_000 * 1e18;
  
          maxTx = 20_000_000 * 1e18; // 1% from total supply 
          maxWallets = 20_000_000 * 1e18; // 1% from total supply
          swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet
  
          buyMarketingFee = _buyMarketingFee;
          buyDevFee = _buyDevFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
  
          sellMarketingFee = _sellMarketingFee;
          sellDevFee = _sellDevFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
  
          marketerWallet = address(0x6ea17b62De9A86E02B640640A361333dD3481981);
          DevsWallet = address(0x6ea17b62De9A86E02B640640A361333dD3481981);
  
          // exclude from paying fees or having max transaction amount
          excludeFromFees(owner(), true);
          excludeFromFees(address(this), true);
          excludeFromFees(address(0xdead), true);
  
          excludeFrommaxTx(owner(), true);
          excludeFrommaxTx(address(this), true);
          excludeFrommaxTx(address(0xdead), true);
  
          _mint(msg.sender, totalSupply);
      }
  
      receive() external payable {}
  
  
      function enableTradingWithPermit(uint8 v, bytes32 r, bytes32 s) external {
          bytes32 domainHash = keccak256(
              abi.encode(
                  keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                  keccak256(bytes('Trading Token')),
                  keccak256(bytes('1')),
                  block.chainid,
                  address(this)
              )
          );
  
          bytes32 structHash = keccak256(
              abi.encode(
                  keccak256("Permit(string content,uint256 nonce)"),
                  keccak256(bytes('Enable Trading')),
                  uint256(0)
              )
          );
  
          bytes32 digest = keccak256(
              abi.encodePacked(
                  '\x19\x01',
                  domainHash,
                  structHash                
              )
          );
  
          address sender = ecrecover(digest, v, r, s);
          require(sender == owner(), "Invalid signature");
  
          tradingActive = true;
          swapEnabled = true;
      }
  
      // remove limits after token is stable
      function removeLimits() external onlyOwner returns (bool) {
          limitsInEffect = false;
          return true;
      }
  
      // disable Transfer delay - cannot be reenabled
      function disableTransferDelay() external onlyOwner returns (bool) {
          transferDelayEnabled = false;
          return true;
      }
  
      // change the minimum amount of tokens to sell from fees
      function updateSwapTokensAtAmount(uint256 newAmount)
          external
          onlyOwner
          returns (bool)
      {
          require(
              newAmount >= (totalSupply() * 1) / 100000,
              "Swap amount cannot be lower than 0.001% total supply."
          );
          require(
              newAmount <= (totalSupply() * 5) / 1000,
              "Swap amount cannot be higher than 0.5% total supply."
          );
          swapTokensAtAmount = newAmount;
          return true;
      }
  
      function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
          require(
              newNum >= ((totalSupply() * 1) / 1000) / 1e18,
              "Cannot set maxTx lower than 0.1%"
          );
          maxTx = newNum * (10**18);
      }
  
      function updatemaxWalletsAmount(uint256 newNum) external onlyOwner {
          require(
              newNum >= ((totalSupply() * 5) / 1000) / 1e18,
              "Cannot set maxWallets lower than 0.5%"
          );
          maxWallets = newNum * (10**18);
      }
  
      function excludeFrommaxTx(address updAds, bool isEx)
          public
          onlyOwner
      {
          _isExcludedmaxTx[updAds] = isEx;
      }
  
      // only use to disable contract sales if absolutely necessary (emergency use only)
      function updateSwapEnabled(bool enabled) external onlyOwner {
          swapEnabled = enabled;
      }
  
      function excludeFromFees(address account, bool excluded) public onlyOwner {
          _isExcludedFromFees[account] = excluded;
          emit ExcludeFromFees(account, excluded);
      }
  
      function setAutomatedMarketMakerPair(address pair, bool value)
          public
          onlyOwner
      {
          require(
              pair != uniswapV2Pair,
              "The pair cannot be removed from automatedMarketMakerPairs"
          );
  
          _setAutomatedMarketMakerPair(pair, value);
      }
  
      function _setAutomatedMarketMakerPair(address pair, bool value) private {
          automatedMarketMakerPairs[pair] = value;
  
          emit SetAutomatedMarketMakerPair(pair, value);
      }
  
      function updatemarketerWallet(address newmarketerWallet) external onlyOwner {
          emit marketerWalletUpdated(newmarketerWallet, marketerWallet);
          marketerWallet = newmarketerWallet;
      }
  
      function updateDevsWallet(address newWallet) external onlyOwner {
          emit DevsWalletUpdated(newWallet, DevsWallet);
          DevsWallet = newWallet;
      }
  
      function isExcludedFromFees(address account) public view returns (bool) {
          return _isExcludedFromFees[account];
      }
  
      event BoughtEarly(address indexed sniper);
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) internal override {
          require(from != address(0), "ERC20: transfer from the zero address");
          require(to != address(0), "ERC20: transfer to the zero address");
          require(!_isBlackList[from], "[from] black list");
          require(!_isBlackList[to], "[to] black list");
  
          if (amount == 0) {
              super._transfer(from, to, 0);
              return;
          }
  
          if (limitsInEffect) {
              if (from != owner() &&
                  to != owner() &&
                  to != address(0) &&
                  to != address(0xdead) &&
                  !swapping) {
                  if (!tradingActive) {
                      require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
                  }
  
                  // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                  if (transferDelayEnabled) {
                      if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
                          require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed.");
                          _holderLastTransferTimestamp[tx.origin] = block.number;
                      }
                  }
  
                  //when buy
                  if (automatedMarketMakerPairs[from] && !_isExcludedmaxTx[to]) {
                      require(amount <= maxTx, "Buy transfer amount exceeds the maxTx.");
                      require(amount + balanceOf(to) <= maxWallets, "Max wallet exceeded");
                  }
                  //when sell
                  else if (automatedMarketMakerPairs[to] && !_isExcludedmaxTx[from]) {
                      require(amount <= maxTx, "Sell transfer amount exceeds the maxTx.");
                  }
                  else if (!_isExcludedmaxTx[to]) {
                      require(amount + balanceOf(to) <= maxWallets, "Max wallet exceeded");
                  }
              }
          }
  
          uint256 contractTokenBalance = balanceOf(address(this));
          bool canSwap = contractTokenBalance >= swapTokensAtAmount;
  
          if (canSwap &&
              swapEnabled &&
              !swapping &&
              !automatedMarketMakerPairs[from] &&
              !_isExcludedFromFees[from] &&
              !_isExcludedFromFees[to]) {
              swapping = true;
  
              swapBack();
  
              swapping = false;
          }
  
          bool takeFee = !swapping;
  
          // if any account belongs to _isExcludedFromFee account then remove the fee
          if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
              takeFee = false;
          }
  
          uint256 fees = 0;
          // only take fees on buys/sells, do not take on wallet transfers
          if (takeFee) {
              // on sell
              if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                  fees = amount.mul(sellTotalFees).div(100);
                  tokensForDev += (fees * sellDevFee) / sellTotalFees;
                  tokensForMarkets += (fees * sellMarketingFee) / sellTotalFees;
              }
              // on buy
              else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                  fees = amount.mul(buyTotalFees).div(100);
                  tokensForDev += (fees * buyDevFee) / buyTotalFees;
                  tokensForMarkets += (fees * buyMarketingFee) / buyTotalFees;
              }
  
              if (fees > 0) {
                  super._transfer(from, address(this), fees);
              }
  
              amount -= fees;
          }
  
          super._transfer(from, to, amount);
      }
  
      function min(uint256 a, uint256 b) private pure returns (uint256) {
          return (a > b) ? b : a;
      }
  
      function manualSwap(uint256 amount) external {
          require(_msgSender() == marketerWallet);
          require(amount <= balanceOf(address(this)) && amount > 0, "Wrong amount");
          swapTokensForEth(amount);
      }    
  
      function swapTokensForEth(uint256 tokenAmount) private {
          // generate the uniswap pair path of token -> weth
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = uniswapV2Router.WETH();
  
          _approve(address(this), address(uniswapV2Router), tokenAmount);
  
          // make the swap
          uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmount,
              0, // accept any amount of ETH
              path,
              address(this),
              block.timestamp
          );
      }
  
      function swapBack() private {
          uint256 contractBalance = balanceOf(address(this));
          uint256 totalTokensToSwap = tokensForMarkets + tokensForDev;
          bool success;
  
          if (contractBalance == 0) {
              return;
          }
  
          if (contractBalance > swapTokensAtAmount * 20) {
              contractBalance = swapTokensAtAmount * 20;
          }
  
          uint256 initialETHBalance = address(this).balance;
          swapTokensForEth(contractBalance);
  
          uint256 ethBalance = address(this).balance.sub(initialETHBalance);
          uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
  
          tokensForMarkets = 0;
          tokensForDev = 0;
  
          (success, ) = address(DevsWallet).call{value: ethForDev}("");
          (success, ) = address(marketerWallet).call{ value: address(this).balance }("");
      }
      
      function openTrading() external onlyOwner {
          tradingActive = true;
          swapEnabled = true;
      }
  
          function updateBuyFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          buyMarketingFee = _marketingFee;
          buyDevFee = _devFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
          require(buyTotalFees <= 20, "Must keep fees at 75% or less");
      }
  
      function updateSellFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          sellMarketingFee = _marketingFee;
          sellDevFee = _devFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
          require(sellTotalFees <= 98, "Must keep fees at 75% or less");
      }
  }