ExampleAntiBotERC20.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

interface IPinkAntiBot {
  function setTokenOwner(address owner) external;

  function onPreTransferCheck(
    address from,
    address to,
    uint256 amount
  ) external;
}

contract ERC20 is IERC20, Ownable {
  using SafeMath for uint256;

  mapping(address => uint256) private _balances;

  mapping(address => mapping(address => uint256)) private _allowances;

  uint256 private _totalSupply;

  string private _name;
  string private _symbol;
  uint8 private _decimals;

  IPinkAntiBot public pinkAntiBot;
  bool public antiBotEnabled;

  constructor(
    string memory name_,
    string memory symbol_,
    uint256 totalSupply_,
    address pinkAntiBot_
  ) {
    _name = name_;
    _symbol = symbol_;
    _decimals = 18;
    _mint(msg.sender, totalSupply_);

    // Initiate PinkAntiBot instance from its address
    pinkAntiBot = IPinkAntiBot(pinkAntiBot_);
    // Register deployer as the owner of this token with PinkAntiBot contract
    pinkAntiBot.setTokenOwner(msg.sender);
    // Enable using PinkAntiBot in this contract
    antiBotEnabled = true;
  }

  // When you done launching your tokens, simply set this to
  // false so your token does not use PinkAntiBot anymore
  function setUsingAntiBot(bool enabled_) external onlyOwner {
    antiBotEnabled = enabled_;
  }

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

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

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

  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);
    _approve(
      sender,
      _msgSender(),
      _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")
    );
    return true;
  }

  function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
    return true;
  }

  function decreaseAllowance(address spender, uint256 subtractedValue)
    public
    virtual
    returns (bool)
  {
    _approve(
      _msgSender(),
      spender,
      _allowances[_msgSender()][spender].sub(
        subtractedValue,
        "ERC20: decreased allowance below zero"
      )
    );
    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");

    // When you done launching, you can call setUsingAntiBot(false) to
    // disable PinkAntiBot in your token instead of interacting with the
    // PinkAntiBot contract
    if (antiBotEnabled) {
      // Check for malicious transfers
      pinkAntiBot.onPreTransferCheck(sender, recipient, amount);
    }

    // We dont check inside this hook because we dont care about
    // minting and burning transfers
    _beforeTokenTransfer(sender, recipient, amount);

    _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(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 = _totalSupply.add(amount);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(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);

    _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
    _totalSupply = _totalSupply.sub(amount);
    emit Transfer(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 _setupDecimals(uint8 decimals_) internal virtual {
    _decimals = decimals_;
  }

  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 amount
  ) internal virtual {}
}