Skip to main content

4.Wallet

一个最基本的钱包,其实只需要两个功能

  • Anyone can send ETH.
  • Only the owner can withdraw.

最小实现:

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

contract EtherWallet {
address payable public owner;

constructor() {
owner = payable(msg.sender);
}

receive() external payable {}

function withdraw(uint256 _amount) external {
require(msg.sender == owner, "caller is not owner");
payable(msg.sender).transfer(_amount);
}

function getBalance() external view returns (uint256) {
return address(this).balance;
}
}