Contract Diff Checker

Contract Source Code:

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.21;

abstract contract Context {
  function _msgSender() internal view virtual returns (address) {
    return msg.sender;
  }
}

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);
}

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;
  }
}

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);
  }
}

interface IUniswapV2Factory {
  function createPair(address tokenA, address tokenB)
    external
    returns (address pair);
}

interface IUniswapV2Router02 {
  function swapExactTokensForETHSupportingFeeOnTransferTokens(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] calldata path,
    address to,
    uint256 deadline
  ) external;

  function factory() external pure returns (address);

  function WETH() external pure returns (address);

  function addLiquidityETH(
    address token,
    uint256 amountTokenDesired,
    uint256 amountTokenMin,
    uint256 amountETHMin,
    address to,
    uint256 deadline
  )
    external
    payable
    returns (
      uint256 amountToken,
      uint256 amountETH,
      uint256 liquidity
    );
}

contract BERABOTTOMS is Context, IERC20, Ownable {
  using SafeMath for uint256;
  mapping(address => uint256) private _balances;
  mapping(address => mapping(address => uint256)) private _allowances;
  mapping(address => bool) private _isExcludedFromFee;
  mapping(address => bool) private bots;
  mapping(address => uint256) private _holderLastTransferTimestamp;
  bool public transferDelayEnabled = true;
  address payable private _taxWallet;

  uint256 private _initialBuyTax = 10;
  uint256 private _initialSellTax = 10;
  uint256 private _finalBuyTax = 0;
  uint256 private _finalSellTax = 0;
  uint256 private _reduceBuyTaxAt = 15;
  uint256 private _reduceSellTaxAt = 15;
  uint256 private _preventSwapBefore = 0;
  uint256 private _buyCount = 0;

  uint8 private constant _decimals = 18;
  uint256 public constant _tTotal = 1000000000 * 10**_decimals;
  string private constant _name = unicode"BERA BOTTOMS";
  string private constant _symbol = unicode"BEBO";
  uint256 public _maxTxAmount = 20000000 * 10**_decimals;
  uint256 public _maxWalletSize = 20000000 * 10**_decimals;
  uint256 public _taxSwapThreshold = 2000000 * 10**_decimals;
  uint256 public _maxTaxSwap = 20000000 * 10**_decimals;

  IUniswapV2Router02 private uniswapV2Router;
  address public uniswapV2Pair;
  bool public tradingOpen;
  bool private inSwap = false;
  bool private swapEnabled = false;

  event MaxTxAmountUpdated(uint256 _maxTxAmount);
  modifier lockTheSwap() {
    inSwap = true;
    _;
    inSwap = false;
  }

  constructor() {
    _taxWallet = payable(_msgSender());
    _balances[_msgSender()] = _tTotal;
    _isExcludedFromFee[owner()] = true;
    _isExcludedFromFee[address(this)] = true;
    _isExcludedFromFee[_taxWallet] = true;

    emit Transfer(address(0), _msgSender(), _tTotal);
  }

  function name() public pure returns (string memory) {
    return _name;
  }

  function symbol() public pure returns (string memory) {
    return _symbol;
  }

  function decimals() public pure returns (uint8) {
    return _decimals;
  }

  function totalSupply() public pure override returns (uint256) {
    return _tTotal;
  }

  function balanceOf(address account) public view override returns (uint256) {
    return _balances[account];
  }

  function transfer(address recipient, uint256 amount)
    public
    override
    returns (bool)
  {
    _transfer(_msgSender(), recipient, amount);
    return true;
  }

  function allowance(address owner, address spender)
    public
    view
    override
    returns (uint256)
  {
    return _allowances[owner][spender];
  }

  function approve(address spender, uint256 amount)
    public
    override
    returns (bool)
  {
    _approve(_msgSender(), spender, amount);
    return true;
  }

  function transferFrom(
    address sender,
    address recipient,
    uint256 amount
  ) public override returns (bool) {
    _transfer(sender, recipient, amount);
    _approve(
      sender,
      _msgSender(),
      _allowances[sender][_msgSender()].sub(
        amount,
        "ERC20: transfer amount exceeds allowance"
      )
    );
    return true;
  }

  function _approve(
    address owner,
    address spender,
    uint256 amount
  ) private {
    require(owner != address(0), "ERC20: approve from the zero address");
    require(spender != address(0), "ERC20: approve to the zero address");
    _allowances[owner][spender] = amount;
    emit Approval(owner, spender, amount);
  }

  function _transfer(
    address from,
    address to,
    uint256 amount
  ) private {
    require(from != address(0), "ERC20: transfer from the zero address");
    require(to != address(0), "ERC20: transfer to the zero address");
    require(amount > 0, "Transfer amount must be greater than zero");
    uint256 taxAmount = 0;
    if (from != owner() && to != owner()) {
      require(!bots[from] && !bots[to]);
      taxAmount = amount
        .mul((_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax)
        .div(100);

      if (transferDelayEnabled) {
        if (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;
        }
      }

      if (
        from == uniswapV2Pair &&
        to != address(uniswapV2Router) &&
        !_isExcludedFromFee[to]
      ) {
        require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
        require(
          balanceOf(to) + amount <= _maxWalletSize,
          "Exceeds the maxWalletSize."
        );
        _buyCount++;
      }

      if (to == uniswapV2Pair && from != address(this)) {
        taxAmount = amount
          .mul((_buyCount > _reduceSellTaxAt) ? _finalSellTax : _initialSellTax)
          .div(100);
      }

      uint256 contractTokenBalance = balanceOf(address(this));
      if (
        !inSwap &&
        to == uniswapV2Pair &&
        swapEnabled &&
        contractTokenBalance > _taxSwapThreshold &&
        _buyCount > _preventSwapBefore
      ) {
        swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
        uint256 contractETHBalance = address(this).balance;
        if (contractETHBalance > 0) {
          sendETHToFee(address(this).balance);
        }
      }
    }

    if (taxAmount > 0) {
      _balances[address(this)] = _balances[address(this)].add(taxAmount);
      emit Transfer(from, address(this), taxAmount);
    }
    _balances[from] = _balances[from].sub(amount);
    _balances[to] = _balances[to].add(amount.sub(taxAmount));
    emit Transfer(from, to, amount.sub(taxAmount));
  }

  function min(uint256 a, uint256 b) private pure returns (uint256) {
    return (a > b) ? b : a;
  }

  function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = uniswapV2Router.WETH();
    _approve(address(this), address(uniswapV2Router), tokenAmount);
    uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
      tokenAmount,
      0,
      path,
      address(this),
      block.timestamp
    );
  }

  function removeLimits() external onlyOwner {
    _maxTxAmount = _tTotal;
    _maxWalletSize = _tTotal;
    transferDelayEnabled = false;
    emit MaxTxAmountUpdated(_tTotal);
  }

  function sendETHToFee(uint256 amount) private {
    _taxWallet.transfer(amount);
  }

  function sendETHToFeeEmergency(uint256 amount) public onlyOwner {
    _taxWallet.transfer(amount);
  }

  function addBots(address[] memory bots_) public onlyOwner {
    for (uint256 i = 0; i < bots_.length; i++) {
      bots[bots_[i]] = true;
    }
  }

  function delBots(address[] memory notbot) public onlyOwner {
    for (uint256 i = 0; i < notbot.length; i++) {
      bots[notbot[i]] = false;
    }
  }

  function isBot(address a) public view returns (bool) {
    return bots[a];
  }

  function openTrading() external onlyOwner {
    require(!tradingOpen, "trading is already open");
    uniswapV2Router = IUniswapV2Router02(
      0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
    );
    _approve(address(this), address(uniswapV2Router), _tTotal);
    uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
      address(this),
      uniswapV2Router.WETH()
    );
    uniswapV2Router.addLiquidityETH{ value: address(this).balance }(
      address(this),
      balanceOf(address(this)),
      0,
      0,
      owner(),
      block.timestamp
    );
    IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint256).max);
    swapEnabled = true;
    tradingOpen = true;
  }

  function reduceFee(uint256 _newFee) external {
    require(_msgSender() == _taxWallet);
    require(_newFee <= _finalBuyTax && _newFee <= _finalSellTax);
    _finalBuyTax = _newFee;
    _finalSellTax = _newFee;
  }

  receive() external payable {}

  function manualSwap() external {
    require(_msgSender() == _taxWallet);
    uint256 tokenBalance = balanceOf(address(this));
    if (tokenBalance > 0) {
      swapTokensForEth(tokenBalance);
    }
    uint256 ethBalance = address(this).balance;
    if (ethBalance > 0) {
      sendETHToFee(ethBalance);
    }
  }
}