// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract TokenPresale {
    address public owner;
    uint256 public tokenPrice = 0.01 ether; // Example price
    uint256 public tokensSold;

    event Sold(address buyer, uint256 amount);

    constructor() {
        owner = msg.sender;
    }

    function buyTokens() public payable {
        require(msg.value >= tokenPrice, "Insufficient ETH sent");
        uint256 tokenAmount = msg.value / tokenPrice;
        tokensSold += tokenAmount;
        emit Sold(msg.sender, tokenAmount);
    }

    function endSale() public {
        require(msg.sender == owner, "Only owner can end the sale");
        payable(owner).transfer(address(this).balance);
    }
}