Helloweb3 is a framework for writing blockchain CTF challenges. It is build as a versioned python package to minimize copy-pasting, and the architecture is modular. Out of the box, a mixin for Solidity challenges running on an isolated Anvil instance, as well as support for a simple PoW rate-limiting scheme are provided.
See the templates to get started.
You can use this command to launch a web-based blockchain explorer on your challenge:
docker run -p 8000:80 -e ERIGON_URL=$rpc_url otterscan/otterscanThen, navigate to https://localhost:8000
The template also includes glue code to solve using a Forge script.