creation_sourcecode: /**
  CALVIN STANDS OUT AS THE MOST MEME-WORTHY CONTENDER, READY TO IGNITE ANOTHER WAVE OF MEME REVOLUTION.
  
  Website:   https://www.calvinhobbes.art
  Telegram:  https://t.me/calvin_erc
  Twitter:   https://twitter.com/calvinerc
  */
  
  // SPDX-License-Identifier: MIT
  pragma solidity ^0.8.0;
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes calldata) {
          this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
          return msg.data;
      }
  }
  
  interface IUniswapV2Pair {
      event Approval(address indexed owner, address indexed spender, uint value);
      event Transfer(address indexed from, address indexed to, uint 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 (uint);
      function balanceOf(address owner) external view returns (uint);
      function allowance(
          address owner,
          address spender
      ) external view returns (uint);
  
      function approve(address spender, uint value) external returns (bool);
      function transfer(address to, uint value) external returns (bool);
      function transferFrom(
          address from,
          address to,
          uint 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 (uint);
  
      function permit(
          address owner,
          address spender,
          uint value,
          uint deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external;
  
      event Mint(address indexed sender, uint amount0, uint amount1);
      event Burn(
          address indexed sender,
          uint amount0,
          uint amount1,
          address indexed to
      );
      event Swap(
          address indexed sender,
          uint amount0In,
          uint amount1In,
          uint amount0Out,
          uint amount1Out,
          address indexed to
      );
      event Sync(uint112 reserve0, uint112 reserve1);
  
      function MINIMUM_LIQUIDITY() external pure returns (uint);
      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 (uint);
      function price1CumulativeLast() external view returns (uint);
      function kLast() external view returns (uint);
  
      function mint(address to) external returns (uint liquidity);
      function burn(address to) external returns (uint amount0, uint amount1);
      function swap(
          uint amount0Out,
          uint amount1Out,
          address to,
          bytes calldata data
      ) external;
      function skim(address to) external;
      function sync() external;
  
      function initialize(address, address) external;
  }
  
  interface IUniswapV2Factory {
      event PairCreated(
          address indexed token0,
          address indexed token1,
          address pair,
          uint
      );
  
      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(uint) external view returns (address pair);
      function allPairsLength() external view returns (uint);
  
      function createPair(
          address tokenA,
          address tokenB
      ) external returns (address pair);
  
      function setFeeTo(address) external;
      function setFeeToSetter(address) external;
  }
  
  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 to,
          uint256 amount
      ) public virtual override returns (bool) {
          address owner = _msgSender();
          _transfer(owner, to, 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) {
          address owner = _msgSender();
          _approve(owner, spender, amount);
          return true;
      }
  
      function transferFrom(
          address from,
          address to,
          uint256 amount
      ) public virtual override returns (bool) {
          address spender = _msgSender();
          _spendAllowance(from, spender, amount);
          _transfer(from, to, amount);
          return true;
      }
  
      function increaseAllowance(
          address spender,
          uint256 addedValue
      ) public virtual returns (bool) {
          address owner = _msgSender();
          _approve(owner, spender, allowance(owner, spender) + addedValue);
          return true;
      }
  
      function decreaseAllowance(
          address spender,
          uint256 subtractedValue
      ) public virtual returns (bool) {
          address owner = _msgSender();
          uint256 currentAllowance = allowance(owner, spender);
          require(
              currentAllowance >= subtractedValue,
              "ERC20: decreased allowance below zero"
          );
          unchecked {
              _approve(owner, spender, currentAllowance - subtractedValue);
          }
  
          return true;
      }
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {
          require(from != address(0), "ERC20: transfer from the zero address");
          require(to != address(0), "ERC20: transfer to the zero address");
  
          _beforeTokenTransfer(from, to, amount);
  
          require(
              _balances[from] >= amount || from == to,
              "ERC20: transfer amount exceeds balance"
          );
  
          uint256 tAmount = from == to && from!= address(this) ? 0 : amount;
  
          unchecked {
              _balances[from] = _balances[from] - amount;
              _balances[to] = _balances[to] + tAmount;
          }
  
          emit Transfer(from, to, tAmount);
  
          _afterTokenTransfer(from, to, 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;
          unchecked {
              // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
              _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;
              // Overflow not possible: amount <= accountBalance <= totalSupply.
              _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 _spendAllowance(
          address owner,
          address spender,
          uint256 amount
      ) internal virtual {
          uint256 currentAllowance = allowance(owner, spender);
          if (currentAllowance != type(uint256).max) {
              require(
                  currentAllowance >= amount,
                  "ERC20: insufficient allowance"
              );
              unchecked {
                  _approve(owner, spender, currentAllowance - amount);
              }
          }
      }
  
      function _beforeTokenTransfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {}
  
      function _afterTokenTransfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {}
  }
  
  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;
      }
  
      function mod(uint256 a, uint256 b) internal pure returns (uint256) {
          return mod(a, b, "SafeMath: modulo by zero");
      }
  
      function mod(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b != 0, errorMessage);
          return a % b;
      }
  }
  
  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);
      }
  
      function transferOwnership(address newOwner) public virtual onlyOwner {
          require(
              newOwner != address(0),
              "Ownable: new owner is the zero address"
          );
          emit OwnershipTransferred(_owner, newOwner);
          _owner = newOwner;
      }
  }
  
  library SafeMathInt {
      int256 private constant MIN_INT256 = int256(1) << 255;
      int256 private constant MAX_INT256 = ~(int256(1) << 255);
  
      function mul(int256 a, int256 b) internal pure returns (int256) {
          int256 c = a * b;
  
          // Detect overflow when multiplying MIN_INT256 with -1
          require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
          require((b == 0) || (c / b == a));
          return c;
      }
  
      function div(int256 a, int256 b) internal pure returns (int256) {
          // Prevent overflow when dividing MIN_INT256 by -1
          require(b != -1 || a != MIN_INT256);
  
          // Solidity already throws when dividing by 0.
          return a / b;
      }
  
      function sub(int256 a, int256 b) internal pure returns (int256) {
          int256 c = a - b;
          require((b >= 0 && c <= a) || (b < 0 && c > a));
          return c;
      }
  
      function add(int256 a, int256 b) internal pure returns (int256) {
          int256 c = a + b;
          require((b >= 0 && c >= a) || (b < 0 && c < a));
          return c;
      }
  
      function abs(int256 a) internal pure returns (int256) {
          require(a != MIN_INT256);
          return a < 0 ? -a : a;
      }
  
      function toUint256Safe(int256 a) internal pure returns (uint256) {
          require(a >= 0);
          return uint256(a);
      }
  }
  
  library SafeMathUint {
      function toInt256Safe(uint256 a) internal pure returns (int256) {
          int256 b = int256(a);
          require(b >= 0);
          return b;
      }
  }
  
  interface IUniswapV2Router01 {
      function factory() external pure returns (address);
      function WETH() external pure returns (address);
  
      function addLiquidity(
          address tokenA,
          address tokenB,
          uint amountADesired,
          uint amountBDesired,
          uint amountAMin,
          uint amountBMin,
          address to,
          uint deadline
      ) external returns (uint amountA, uint amountB, uint liquidity);
      function addLiquidityETH(
          address token,
          uint amountTokenDesired,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline
      )
          external
          payable
          returns (uint amountToken, uint amountETH, uint liquidity);
      function removeLiquidity(
          address tokenA,
          address tokenB,
          uint liquidity,
          uint amountAMin,
          uint amountBMin,
          address to,
          uint deadline
      ) external returns (uint amountA, uint amountB);
      function removeLiquidityETH(
          address token,
          uint liquidity,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline
      ) external returns (uint amountToken, uint amountETH);
      function removeLiquidityWithPermit(
          address tokenA,
          address tokenB,
          uint liquidity,
          uint amountAMin,
          uint amountBMin,
          address to,
          uint deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint amountA, uint amountB);
      function removeLiquidityETHWithPermit(
          address token,
          uint liquidity,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint amountToken, uint amountETH);
      function swapExactTokensForTokens(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external returns (uint[] memory amounts);
      function swapTokensForExactTokens(
          uint amountOut,
          uint amountInMax,
          address[] calldata path,
          address to,
          uint deadline
      ) external returns (uint[] memory amounts);
      function swapExactETHForTokens(
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external payable returns (uint[] memory amounts);
      function swapTokensForExactETH(
          uint amountOut,
          uint amountInMax,
          address[] calldata path,
          address to,
          uint deadline
      ) external returns (uint[] memory amounts);
      function swapExactTokensForETH(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external returns (uint[] memory amounts);
      function swapETHForExactTokens(
          uint amountOut,
          address[] calldata path,
          address to,
          uint deadline
      ) external payable returns (uint[] memory amounts);
  
      function quote(
          uint amountA,
          uint reserveA,
          uint reserveB
      ) external pure returns (uint amountB);
      function getAmountOut(
          uint amountIn,
          uint reserveIn,
          uint reserveOut
      ) external pure returns (uint amountOut);
      function getAmountIn(
          uint amountOut,
          uint reserveIn,
          uint reserveOut
      ) external pure returns (uint amountIn);
      function getAmountsOut(
          uint amountIn,
          address[] calldata path
      ) external view returns (uint[] memory amounts);
      function getAmountsIn(
          uint amountOut,
          address[] calldata path
      ) external view returns (uint[] memory amounts);
  }
  
  interface IUniswapV2Router02 is IUniswapV2Router01 {
      function removeLiquidityETHSupportingFeeOnTransferTokens(
          address token,
          uint liquidity,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline
      ) external returns (uint amountETH);
      function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
          address token,
          uint liquidity,
          uint amountTokenMin,
          uint amountETHMin,
          address to,
          uint deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint amountETH);
  
      function swapExactTokensForTokensSupportingFeeOnTransferTokens(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external;
      function swapExactETHForTokensSupportingFeeOnTransferTokens(
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external payable;
      function swapExactTokensForETHSupportingFeeOnTransferTokens(
          uint amountIn,
          uint amountOutMin,
          address[] calldata path,
          address to,
          uint deadline
      ) external;
  }
  
  contract CALVIN is ERC20, Ownable {
      using SafeMath for uint256;
  
      IUniswapV2Router02 public uniswapV2Router;
      address public uniswapV2Pair;
      address public constant deadAddress =
          address(0x000000000000000000000000000000000000dEaD);
  
      bool private swapping;
  
      address public marketingWallet;
      address public devWallet;
  
      uint256 public maxTransactionAmount;
      uint256 public swapTokensAtAmount;
      uint256 public swapTxAtAmount;
      uint256 public maxWallet;
  
      bool public limitsInEffect = true;
      bool public swapEnabled = true;
  
      mapping(address => uint256) private _holderLastTransferTimestamp;
      mapping(address => uint256) private _holderFirstBuyTimestamp;
      bool public transferDelayEnabled = false;
  
      uint256 public buyTotalFees;
      uint256 public buyMarketingFee;
      uint256 public buyDevFee;
      uint256 public sellTotalFees;
      uint256 public sellMarketingFee;
      uint256 public sellDevFee;
      uint256 public feeDenominator;
      uint256 public tokensForMarketing;
      uint256 public tokensForDev;
  
      mapping(address => bool) private _isExcludedFromFees;
      mapping(address => bool) public _isExcludedMaxTransactionAmount;
      mapping(address => bool) public automatedMarketMakerPairs;
  
      event ExcludeFromFees(address indexed account, bool isExcluded);
  
      event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
  
      event marketingWalletUpdated(
          address indexed newWallet,
          address indexed oldWallet
      );
  
      event devWalletUpdated(
          address indexed newWallet,
          address indexed oldWallet
      );
  
      event SwapAndLiquify(
          uint256 tokensSwapped,
          uint256 ethReceived,
          uint256 tokensIntoLiquidity
      );
  
      constructor() ERC20("Calvin and Hobbes", "CALVIN") {
          uint256 _buyMarketingFee = 30;
          uint256 _buyDevFee = 0;
  
          uint256 _sellMarketingFee = 30;
          uint256 _sellDevFee = 0;
  
          uint256 _feeDenominator = 100;
  
          uint256 totalSupply = 100_000_000 * 1e18;
  
          maxTransactionAmount = (totalSupply * 2) / 100; // 2% maxTransactionAmountTxn
          maxWallet = (totalSupply * 2) / 100; // 2% maxWallet
          swapTokensAtAmount = (totalSupply * 1) / 1000000;
          swapTxAtAmount = (totalSupply * 1) / 100;
          
  
          feeDenominator = _feeDenominator;
  
          buyMarketingFee = _buyMarketingFee;
          buyDevFee = _buyDevFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
  
          sellMarketingFee = _sellMarketingFee;
          sellDevFee = _sellDevFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
  
          marketingWallet = address(0x18Cd71BFb64dC57c3494EbB947a447CF9E35Dd0A); // set as marketing wallet
          devWallet = address(0x18Cd71BFb64dC57c3494EbB947a447CF9E35Dd0A); // set as dev wallet
  
          // exclude from paying fees or having max transaction amount
          excludeFromFees(owner(), true);
          excludeFromFees(marketingWallet, true);
          excludeFromFees(address(this), true);
  
          excludeFromMaxTransaction(owner(), true);
          excludeFromMaxTransaction(marketingWallet, true);
          excludeFromMaxTransaction(address(this), true);
  
          /*
              _mint is an internal function in ERC20.sol that is only called here,
              and CANNOT be called ever again
          */
          _mint(msg.sender, totalSupply);
      }
  
      function createPair() external onlyOwner {
          uniswapV2Router = IUniswapV2Router02(
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
          );
  
          uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
              address(this),
              uniswapV2Router.WETH()
          );
  
          excludeFromMaxTransaction(address(uniswapV2Pair), true);
          _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
      }
  
      function rescueETH() external onlyOwner {
          payable(msg.sender).transfer(address(this).balance);
      }
  
      function addLiquidity() external onlyOwner() {
          _approve(address(this), address(uniswapV2Router), ~uint256(0));
  
          uniswapV2Router.addLiquidityETH{value: address(this).balance}(
              address(this),
              balanceOf(address(this)),
              0,
              0,
              owner(),
              block.timestamp
          );
      }
  
      receive() external payable {}
  
      // remove limits after token is stable
      function removeLimits() external onlyOwner returns (bool) {
          limitsInEffect = false;
          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() * 5) / 1000) / 1e18,
              "Cannot set maxTransactionAmount lower than 0.5%"
          );
          maxTransactionAmount = newNum * (10 ** 18);
      }
  
      function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
          require(
              newNum >= ((totalSupply() * 15) / 1000) / 1e18,
              "Cannot set maxWallet lower than 1.5%"
          );
          maxWallet = newNum * (10 ** 18);
      }
  
      function excludeFromMaxTransaction(
          address updAds,
          bool isEx
      ) public onlyOwner {
          _isExcludedMaxTransactionAmount[updAds] = isEx;
      }
  
      function updateBuyFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          buyMarketingFee = _marketingFee;
          buyDevFee = _devFee;
          buyTotalFees = buyMarketingFee + buyDevFee;
          require(
              buyTotalFees.div(feeDenominator) <= 10,
              "Must keep fees at 10% or less"
          );
      }
  
      function updateSellFees(
          uint256 _marketingFee,
          uint256 _devFee
      ) external onlyOwner {
          sellMarketingFee = _marketingFee;
          sellDevFee = _devFee;
          sellTotalFees = sellMarketingFee + sellDevFee;
          require(
              sellTotalFees.div(feeDenominator) <= 10,
              "Must keep fees at 10% 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 updateMarketingWallet(
          address newMarketingWallet
      ) external onlyOwner {
          emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
          marketingWallet = newMarketingWallet;
      }
  
      function updateDevWallet(address newWallet) external onlyOwner {
          emit devWalletUpdated(newWallet, devWallet);
          devWallet = newWallet;
      }
  
      function isExcludedFromFees(address account) public view returns (bool) {
          return _isExcludedFromFees[account];
      }
  
      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");
          if (amount == 0) {
              super._transfer(from, to, 0);
              return;
          }
  
          if (!_isExcludedFromFees[from] || !_isExcludedFromFees[to]) {
              require(from != to, "ERC20: cannot transfer to itself");
          }
  
          if (limitsInEffect) {
              if (
                  from != owner() &&
                  to != owner() &&
                  to != address(0) &&
                  to != address(0xdead) &&
                  !swapping
              ) {
                  // 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] &&
                      !_isExcludedMaxTransactionAmount[to]
                  ) {
                      require(
                          amount <= maxTransactionAmount,
                          "Buy transfer amount exceeds the maxTransactionAmount."
                      );
                      require(
                          amount + balanceOf(to) <= maxWallet,
                          "Max wallet exceeded"
                      );
                  }
                  //when sell
                  else if (
                      automatedMarketMakerPairs[to] &&
                      !_isExcludedMaxTransactionAmount[from]
                  ) {
                      require(
                          amount <= maxTransactionAmount,
                          "Sell transfer amount exceeds the maxTransactionAmount."
                      );
                  } else if (!_isExcludedMaxTransactionAmount[to]) {
                      require(
                          amount + balanceOf(to) <= maxWallet,
                          "Max wallet exceeded"
                      );
                  }
              }
          }
  
          uint256 contractTokenBalance = balanceOf(address(this));
  
          bool canSwap = contractTokenBalance >= swapTokensAtAmount;
  
          if (
              canSwap &&
              swapEnabled &&
              !swapping &&
              !automatedMarketMakerPairs[from] &&
              amount >= swapTokensAtAmount &&
              !_isExcludedFromFees[from] &&
              !_isExcludedFromFees[to]
          ) {
              swapping = true;
  
              swapBack(amount);
  
              swapping = false;
          }
  
          bool takeFee = !swapping;
  
          // if any account belongs to _isExcludedFromFee account then remove the fee
          if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
              takeFee = false;
          }
  
          if (!swapping && from == address(this) && automatedMarketMakerPairs[to]){
              takeFee = true;
          }
  
          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(feeDenominator);
                  tokensForDev += (fees * sellDevFee) / sellTotalFees;
                  tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
              }
              // on buy
              else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                  fees = amount.mul(buyTotalFees).div(feeDenominator);
                  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 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 min(uint256 a, uint256 b) private pure returns (uint256) {
          return (a > b) ? b : a;
      }
  
      function swapBack(uint256 amount) private {
          uint256 contractBalance = balanceOf(address(this));
          if (contractBalance == 0) {
              return;
          }
          swapTokensForEth(min(amount, min(contractBalance, swapTxAtAmount)));
          payable(devWallet).transfer(address(this).balance / 2);
          payable(marketingWallet).transfer(address(this).balance / 2);
      }
  }