Untitled

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

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

contract TESTER is ERC20, Ownable {
    uint256 private constant _initialSupply = 100000 * 10**18;

    mapping(address => bool) private _whitelist;
    mapping(address => bool) private _blacklist;
    mapping(address => uint256) private _lastTransactionTime;
    bool public presaleActive = true;

    uint256 private constant MIN_TRANSACTION_INTERVAL = 15 seconds;

    event WhitelistAdded(address indexed account);
    event WhitelistRemoved(address indexed account);
    event BlacklistAdded(address indexed account);
    event BlacklistRemoved(address indexed account);
    event PresaleEnded();

    constructor() ERC20("TESTER", "TST") Ownable(msg.sender) {
        _mint(msg.sender, _initialSupply);
    }

    modifier onlyWhitelisted() {
        require(_whitelist[msg.sender], "Not whitelisted");
        _;
    }

    modifier notBlacklisted(address account) {
        require(!_blacklist[account], "Blacklisted");
        _;
    }

    function addToWhitelist(address account) external onlyOwner {
        _whitelist[account] = true;
        emit WhitelistAdded(account);
    }

    function removeFromWhitelist(address account) external onlyOwner {
        _whitelist[account] = false;
        emit WhitelistRemoved(account);
    }

    function addToBlacklist(address account) external onlyOwner {
        _blacklist[account] = true;
        emit BlacklistAdded(account);
    }

    function removeFromBlacklist(address account) external onlyOwner {
        _blacklist[account] = false;
        emit BlacklistRemoved(account);
    }

    function endPresale() external onlyOwner {
        presaleActive = false;
        emit PresaleEnded();
    }

    function transfer(address recipient, uint256 amount) public virtual override notBlacklisted(msg.sender) notBlacklisted(recipient) returns (bool) {
        require(block.timestamp >= _lastTransactionTime[msg.sender] + MIN_TRANSACTION_INTERVAL, "Anti-bot: Too soon since last transaction");
        require(block.timestamp >= _lastTransactionTime[recipient] + MIN_TRANSACTION_INTERVAL, "Anti-bot: Too soon since last transaction");

        _lastTransactionTime[msg.sender] = block.timestamp;
        _lastTransactionTime[recipient] = block.timestamp;

        if (presaleActive) {
            require(msg.sender == owner() || _whitelist[recipient], "Presale: Only whitelisted accounts can buy during presale");
        }

        return super.transfer(recipient, amount);
    }

    function transferFrom(address sender, address recipient, uint256 amount) public virtual override notBlacklisted(sender) notBlacklisted(recipient) returns (bool) {
        require(block.timestamp >= _lastTransactionTime[sender] + MIN_TRANSACTION_INTERVAL, "Anti-bot: Too soon since last transaction");
        require(block.timestamp >= _lastTransactionTime[recipient] + MIN_TRANSACTION_INTERVAL, "Anti-bot: Too soon since last transaction");

        _lastTransactionTime[sender] = block.timestamp;
        _lastTransactionTime[recipient] = block.timestamp;

        if (presaleActive) {
            require(sender == owner() || _whitelist[recipient], "Presale: Only whitelisted accounts can buy during presale");
        }

        return super.transferFrom(sender, recipient, amount);
    }
}