1. 题目
I created a token bank. It allows anyone to deposit tokens by transferring them to the bank and then to withdraw those tokens later. It uses ERC 223 to accept the incoming tokens.
The bank de...
1. 题目
To complete this challenge, become the owner
源码
12345678910111213141516pragma solidity ^0.4.21;contract AssumeOwnershipChallenge { address owner; bool public isComplete; functi...
1. 题目
To complete this challenge, send a transaction from the owner‘s account.
源码
123456789101112pragma solidity ^0.4.21;contract AccountTakeoverChallenge { address owner = 0x6B477781b0e68...
Public Key1. 题目
Recall that an address is the last 20 bytes of the keccak-256 hash of the address’s public key.
To complete this challenge, find the public key for the owner‘s account.
源码
12345678...