ArgentPulsePresale

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IERC20 {
    function transfer(address to, uint256 value) external returns (bool);
    function balanceOf(address account) external view returns (uint256);
}

contract ArgentPulsePresale {
    IERC20 public token;
    address public owner;
    uint256 public rate = 100000; // 1 ETH = 100,000 ARGP
    uint256 public tokensSold;
    uint256 public maxTokens = 10_000_000 * 1e18; // максимум 10 млн ARGP
    uint256 public endTime; // дедлайн

    event TokensPurchased(address indexed buyer, uint256 amountETH, uint256 amountTokens);
    event Withdraw(address indexed to, uint256 amountETH);

    constructor(address _token, uint256 _endTime) {
        token = IERC20(_token);
        owner = msg.sender;
        endTime = _endTime;
    }

    function buyTokens() public payable {
        require(block.timestamp < endTime, "Presale ended");
        require(msg.value > 0, "Send ETH to buy tokens");

        uint256 tokens = msg.value * rate;
        require(tokensSold + tokens <= maxTokens, "Presale sold out");

        tokensSold += tokens;
        require(token.transfer(msg.sender, tokens), "Transfer failed");

        emit TokensPurchased(msg.sender, msg.value, tokens);
    }

    function withdrawETH(address payable _to) public {
        require(msg.sender == owner, "Not owner");
        _to.transfer(address(this).balance);
    }
}