Here is my new Nostr relay library: https://doc.deno.land/https://gitlab.com/soapbox-pub/nostr-machina/-/raw/main/mod.ts

https://gitlab.com/soapbox-pub/nostr-machina

It's still experimental and doesn't support a pool yet. But it's comprised of a bunch of useful utilities that makes working with WebSockets and Nostr easier.