Blockchain CTF Template

This repository provides a template for building Capture The Flag (CTF) challenges focused on blockchain technology. It leverages Flask for the backend and Web3.py to interact with Ethereum-based smart contracts.

Installation

1. Clone the repository:

   git clone https://github.com/KindKillerwhale/Blockchain-CTF-Template.git

2. Set the Example.sol in the contacts folder.

3. Set the docker-compose.yml and Dockerfile.

4. Set RPC_URL in app.py.

5. Set the ex.py.

6. Docker RUN and TEST~!

※ Transaction must conform to the legacy format (including gasPrice option)

Things that need to be fixed

• Currently, an account is created through ganache in docker-compose.yml and files containing account information are shared in docker volume, but there is a limitation in that the number of accounts is finite. This is inefficient both in terms of performance and capacity. Therefore, when you are asked for the /info method at app.py , you should change it to create an account immediately.
• The code of app.py needs to be neatly overhauled.
• When requested, it is necessary to adopt a method of setting a time limit so that the request cannot be made indefinitely. It is necessary to implement a PoW or a method of hanging timeout.