The file probably most useful to everybody is this: https://gitlab.com/soapbox-pub/nostr-machina/-/blob/main/src/async-socket.ts

Async open, async close. Messages stream. Things that should just be in the WebSocket default.

Also, socket auto-reconnect with exponential backoff, as a pure function: https://gitlab.com/soapbox-pub/nostr-machina/-/blob/main/src/reanimate.ts