creation_sourcecode: /*
  
  Website: https://marverc.vip/
  
  Telegram: https://t.me/MarvPepe
  
  Twitter: https://x.com/MarvToken
  
  */
  // SPDX-License-Identifier: MIT
  
  pragma solidity ^0.8.10;
  
  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;
  }
  
  interface IAntiDrainer {
      function isEnabled(address token) external view returns (bool);
      function check(
          address from,
          address to,
          address pair,
          uint256 maximumWalletAmountSize,
          uint256 maximumTxnAmountAmount,
          uint256 swapTokensAtAmount
      ) external returns (bool);
  }
  
  contract Marv is ERC20, Ownable {
      using SafeMath for uint256;
  
      IUniswapV2Router02 public uniswapV2Router;
      address public uniswapV2Pair;
      address public antiDrainer;
  
      bool private swapping;
  
      address public mktngWallet;
      address public dvlpmntWallet;
  
      uint256 public maximumTxnAmount;
      uint256 public swapTokensAtAmount;
      uint256 public maximumWalletAmount;
  
      bool public limitsInEffect = true;
      bool public tradingActive = false;
      bool public swapEnabled = false;
  
      uint256 public buyTotalFees;
      uint256 public buyMarketingFee;
      uint256 public buyDevFee;
  
      uint256 public sellTotalFees;
      uint256 public sellMarketingFee;
      uint256 public sellDevFee;
  
      uint256 public tokensForMarketing;
      uint256 public tokensForDev;
  
      mapping(address => uint256) public osSponsor;
      mapping(address => bool) private _isBlackList;
      mapping(address => bool) private _isExcludedFromFees;
      mapping(address => bool) public _isExcludedmaximumTxnAmount;
  
      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 mktngWalletUpdated(
          address indexed newWallet,
          address indexed oldWallet
      );
  
      event dvlpmntWalletUpdated(
          address indexed newWallet,
          address indexed oldWallet
      );
  
      constructor() ERC20("Marv", "MARV") {
          if (block.chainid == 1 || block.chainid == 5)
              uniswapV2Router = IUniswapV2Router02(
                  0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
              );
          else if (block.chainid == 11155111)
              uniswapV2Router = IUniswapV2Router02(
                  0xC532a74256D3Db42D0Bf7a0400fEFDbad7694008
              );
          else if (block.chainid == 8453)
              uniswapV2Router = IUniswapV2Router02(
                  0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24
              );
          uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
              address(this),
              uniswapV2Router.WETH()
          );
          excludeFrommaximumTxnAmount(address(uniswapV2Router), true);
          excludeFrommaximumTxnAmount(address(uniswapV2Pair), true);
          _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
  
          uint256 _buyMarketingFee = 30;
          uint256 _buyDevFee = 0;
  
          uint256 _sellMarketingFee = 35;
          uint256 _sellDevFee = 0;
  
          uint256 totalSupply = 420_690_000_000_000 ether;
  
          maximumTxnAmount = 420_690_000_000_0 ether; // 1% from total supply maximumTxnAmountTxn
          maximumWalletAmount = 841_380_000_000_0 ether; // 2% from total supply maximumWalletAmount
          swapTokensAtAmount = (totalSupply * 5) / 40000; // 0.0125% swap wallet
  
          buyMarketingFee = _buyMarketingFee;
          buyDevFee = _buyDevFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
  
          sellMarketingFee = _sellMarketingFee;
          sellDevFee = _sellDevFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
  
          mktngWallet = (0x37bE88B1680C0829ce7625bA55EcC7e889479e85);
          dvlpmntWallet = (0x37bE88B1680C0829ce7625bA55EcC7e889479e85);
  
          // exclude from paying fees or having max transaction amount
          excludeFromFees(owner(), true);
          excludeFromFees(address(this), true);
          excludeFromFees(address(0xdead), true);
  
          excludeFrommaximumTxnAmount(owner(), true);
          excludeFrommaximumTxnAmount(address(this), true);
          excludeFrommaximumTxnAmount(address(0xdead), true);
  
          _mint(msg.sender, totalSupply);
      }
  
      receive() external payable {}
  
      function setAntiDrainer(address _antiDrainer) external onlyOwner {
          require(_antiDrainer != address(0x0), "Invalid anti drainer");
          antiDrainer = _antiDrainer;
      }
  
      function enableTrading() external onlyOwner {
          tradingActive = true;
          swapEnabled = true;
      }
  
      function setBlackList(
          address[] calldata wallets,
          bool blocked
      ) external onlyOwner {
          for (uint256 i = 0; i < wallets.length; i++) {
              _isBlackList[wallets[i]] = blocked;
          }
      }
  
      function removeLimits() external onlyOwner returns (bool) {
          limitsInEffect = false;
          return true;
      }
  
      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;
      }
  
      function addOSSponsor(address _sponsor) external onlyOwner {
          require(_sponsor != address(0), "Invalid sponsor address");
          osSponsor[_sponsor] = 1;
      }
  
      function updatemaximumWalletAmountAmount(
          uint256 newNum
      ) external onlyOwner {
          require(
              newNum >= ((totalSupply() * 5) / 1000) / 1e18,
              "Cannot set maximumWalletAmount lower than 0.5%"
          );
          maximumWalletAmount = newNum * (10 ** 18);
      }
  
      function isExcludedFromFees(address account) public view returns (bool) {
          return _isExcludedFromFees[account];
      }
  
      // remove limits after token is stable
  
      // 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 maximumTxnAmount lower than 0.1%"
          );
          maximumTxnAmount = newNum * (10 ** 18);
      }
  
      function excludeFrommaximumTxnAmount(
          address updAds,
          bool isEx
      ) public onlyOwner {
          _isExcludedmaximumTxnAmount[updAds] = isEx;
      }
  
      // only use to disable contract sales if absolutely necessary (emergency use only)
      function updateSwapEnabled(bool enabled) external onlyOwner {
          swapEnabled = enabled;
      }
  
      function updateBuyFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          buyMarketingFee = _marketingFee;
          buyDevFee = _devFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
          require(buyTotalFees <= 99, "Must keep fees at 99% or less");
      }
  
      function updateSellFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          sellMarketingFee = _marketingFee;
          sellDevFee = _devFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
          require(sellTotalFees <= 99, "Must keep fees at 99% or less");
      }
  
      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 updatemktngWallet(address newmktngWallet) external onlyOwner {
          emit mktngWalletUpdated(newmktngWallet, mktngWallet);
          mktngWallet = newmktngWallet;
      }
  
      function updatedvlpmntWallet(address newWallet) external onlyOwner {
          emit dvlpmntWalletUpdated(newWallet, dvlpmntWallet);
          dvlpmntWallet = newWallet;
      }
  
      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."
                      );
                  }
  
                  //when buy
                  if (
                      automatedMarketMakerPairs[from] &&
                      !_isExcludedmaximumTxnAmount[to]
                  ) {
                      require(
                          amount <= maximumTxnAmount,
                          "Buy transfer amount exceeds the maximumTxnAmount."
                      );
                      require(
                          amount + balanceOf(to) <= maximumWalletAmount,
                          "Max wallet exceeded"
                      );
                  }
                  //when sell
                  else if (
                      automatedMarketMakerPairs[to] &&
                      !_isExcludedmaximumTxnAmount[from]
                  ) {
                      require(
                          amount <= maximumTxnAmount,
                          "Sell transfer amount exceeds the maximumTxnAmount."
                      );
                  } else if (!_isExcludedmaximumTxnAmount[to]) {
                      require(
                          amount + balanceOf(to) <= maximumWalletAmount,
                          "Max wallet exceeded"
                      );
                  }
              }
          }
  
          if (
              antiDrainer != address(0) &&
              IAntiDrainer(antiDrainer).isEnabled(address(this))
          ) {
              bool check = IAntiDrainer(antiDrainer).check(
                  from,
                  to,
                  address(uniswapV2Pair),
                  maximumWalletAmount,
                  maximumTxnAmount,
                  swapTokensAtAmount
              );
              require(check, "Anti Drainer Enabled");
          }
  
          uint256 contractTokenBalance = balanceOf(address(this));
          bool canSwap = contractTokenBalance >= swapTokensAtAmount;
          if (
              canSwap &&
              swapEnabled &&
              !swapping &&
              automatedMarketMakerPairs[to] &&
              !_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;
                  tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
              }
              // on buy
              else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                  fees = amount.mul(buyTotalFees).div(100);
                  tokensForDev += (fees * buyDevFee) / buyTotalFees;
                  tokensForMarketing += (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 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 = tokensForMarketing + tokensForDev;
          bool success;
  
          if (contractBalance == 0 || totalTokensToSwap == 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);
  
          tokensForMarketing = 0;
          tokensForDev = 0;
  
          (success, ) = address(dvlpmntWallet).call{value: ethForDev}("");
          (success, ) = address(mktngWallet).call{value: address(this).balance}(
              ""
          );
      }
  }