【Ethernaut】02 – Fallout 建構子命名錯誤的命運
文章目錄
- 題目
- 解法
1.題目
Fallout
這一關可以幫助你學習智能合約的初始化建構子。
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import 'openzeppelin-contracts-06/math/SafeMath.sol';
contract Fallout {
using SafeMath for uint256;
mapping (address => uint) allocations;
address payable public owner;
/* constructor */
function Fal1out() public payable {
owner = msg.sender;
allocations[owner] = msg.value;
}
modifier onlyOwner {
require(
msg.sender == owner,
"caller is not the owner"
);
_;
}
function allocate() public payable {
allocations[msg.sender] = allocations[msg.sender].add(msg.value);
}
function sendAllocation(address payable allocator) public {
require(allocations[allocator] > 0);
allocator.transfer(allocations[allocator]);
}
function collectAllocations() public onlyOwner {
msg.sender.transfer(address(this).balance);
}
function allocatorBalance(address allocator) public view returns (uint) {
return allocations[allocator];
}
}
2.解法