1. issue
A surprisingly simple pool allows anyone to deposit ETH, and withdraw it at any point in time.
It has 1000 ETH in balance already, and is offering free flash loans using the deposited ETH ...
1. issue
More and more lending pools are offering flash loans. In this case, a new pool has launched that is offering flash loans of DVT tokens for free.
The pool holds 1 million DVT tokens. You ha...
1. issue
There’s a pool with 1000 ETH in balance, offering flash loans. It has a fixed fee of 1 ETH.
A user has deployed a contract with 10 ETH in balance. It’s capable of interacting with the pool...
1. issue
There’s a tokenized vault with a million DVT tokens deposited. It’s offering flash loans for free, until the grace period ends.
To pass the challenge, make the vault stop offering flash lo...
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...
