BIP324 Proxy: easy integration of v2 transport protocol for light clients (PoC)

[theStack]

@josibake

I haven’t looked into how you have the tool designed, but any interest in making this a rust library? For example, GitHub - cloudhead/nakamoto: Privacy-preserving Bitcoin light-client implementation in Rust has it on their roadmap to add BIP324, and I’m sure there are others. Seems like having a library would be generally useful and something that your proxy could be built around.

Yup, I agree that creating a BIP324 library makes a lot of sense (see also 0xb10c’s post above where one idea is to add it to rust-bitcoin).

@josibake

I’m also not fluent in Rust but learning and looking for small-ish projects to work on, so I’d be more than happy to help work on a BIP324 rust library if you’re interested in collaborating.

Sure, that would be great! I forgot to mention this explicitly in the OP, but of course everyone is more than welcome to contribute. For starters, it should be pretty straight-forward to create a module for the BIP324 cipher suite. I think we can use the same interface as BIP324Cipher in Bitcoin Core (see src/bip324.{h,cpp}). Given that there are (hopefully) already Rust crates available for efficient implementations of the cryptographic primitives (secp256k1-ellswift bindings, ChaCha20(Poly1305), HKDF-SHA256 etc.), this shouldn’t even be too much code.