Here's a diagram I made for NIP-46 signing flow with Frostr...

- nostr client sends nip46 request to relay

- igloo server listens for nip46 request

- approves

- passes to other signer (igloo-cli) for partial sig

- gets response from cli and completes sig

- passes back to relay

- nostr client receives signed note and publishes to relays

All of thise happens within like 2 seconds wtf