Schnorr signatures - anyone here willing to collaborate or create a lib?

There are parts that could be tricky in pure Erlang / Elixir, for instance anything that requires constant-time arithmetic.

One way to avoid that would be to wrap an existing Rust library like k256 with Rustler. I’m neither a cryptographer nor much of a Rust dev, but this example seems like it wouldn’t be too much hassle to hook up.

Just a side question: why do you think LiveView is a good fit? Because of its real-timeness? Or because it’s also websocket based?

Both. The real-timeness is possible thanks to websockets.

Havent tried to embed a rust lib in elixir yet… guess it might be time to learn a thing or two about Rustler.

I was hoping for a full native implementation to limit dependencies, such as a rust compiler. I wonder how much complexity this would add to a lib.

Looks like with the help of rustler_precompiled, it’s possible to embed rust code in a lib and not require all dependent projects to have the whole rust toolkit installed…

I would guess the least complex and most straight forward way would be wrap an elixir front end to a well-maintained rust or c++ library, if you do end up going the rust wrapper route I would love to contribute in some way I have dabbled with ideas around this kind of thing but no real killer ideas, I’m in no way a cryptography expert so you’d probably want to find someone who really knows their way around this stuff however I am learning tonnes and happy to pitch in when/how I can.

Well, actually trying somehow wrap this in a nice elixir library that’s also rustler_precompiled… if successful, that would do it. Goal is to embed rust without requiring its compiler in apps depending on the said lib.

Right now, I’m learning rust basics so I have a slight idea of how rustler works as explained here.

At that point, any help would be greatly appreciated. The endgame is to make elixir usable on nostr.

Here’s a library I’ve found that wraps secp256k1 as a NIF library doing a quick search, perhaps this could help point you in the right direction as Schnorr is an extension on ECDSA. Sadly it hasn’t been maintained for several years, I would suppose some good examples of rust NIFs in the community today are:

• GitHub - elixir-explorer/explorer: Series (one-dimensional) and dataframes (two-dimensional) for fast and elegant data exploration in Elixir · GitHub
• GitHub - discord/sorted_set_nif: Elixir SortedSet backed by a Rust-based NIF · GitHub

There are others but these are just the ones I have personally taken a look under the hood of. The rustler documentation has some detailed examples that can get you pretty far. In general this is a common problem, cryptographic primitives as applied to the blockchain often don’t have good library support in elixir

Guess there’s a void waiting to be filled here…

Hey all, not sure how much help I can be, but I’ve dabbled some in Rust and Rustler and think I might be able to help a bit. Looks like folks the Schnorr signatures implementation inside the k256 crate. Curious how you want to go about this, do you want to wrap the entirety of rust-elliptic and only implemented the wrapper for k256 (exposing more as you need later), or do you want to only wrap the k256 portion?

Note that I’m not a cryptography person, just happen to have some Rust and Elixir experience and have played some with Rustler. With that in mind, what can I do that would be helpful for you all?