38 lines
1.1 KiB
Solidity
38 lines
1.1 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "@openzeppelin/contracts/access/Ownable.sol";
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import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
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contract MyContract is Ownable, ReentrancyGuard {
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// Явно объявляем функцию owner
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function owner() public view override returns (address) {
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return super.owner();
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}
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uint256 public price;
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event Purchase(address buyer, uint256 amount);
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constructor() {
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price = 0.01 ether; // Начальная цена 0.01 ETH
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}
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function setPrice(uint256 newPrice) public onlyOwner {
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price = newPrice;
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}
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function getPrice() public view returns (uint256) {
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return price;
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}
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function purchase(uint256 amount) public payable nonReentrant {
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require(msg.value == price * amount, "Incorrect payment amount");
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emit Purchase(msg.sender, amount);
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}
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function withdraw() public onlyOwner nonReentrant {
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(bool success, ) = owner().call{value: address(this).balance}("");
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require(success, "Transfer failed");
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}
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} |