Add server-side AUTH challenge/response handling per NIP-42 spec:
- RelaySession generates a unique challenge per connection and tracks
authenticated pubkeys (multiple users can auth on one session)
- NostrServer gains relayUrl and requireAuth parameters; when requireAuth
is true, EVENT/REQ/COUNT are rejected with auth-required: prefix
- AUTH handler validates kind 22242, created_at within 10 min, challenge
and relay tag matching
- AuthCmd now accepts Event (not just RelayAuthEvent) so the server can
gracefully reject wrong-kind auth attempts
- 11 new tests covering auth success, wrong challenge/relay/kind/timestamp,
multi-user auth, and requireAuth gating
https://claude.ai/code/session_017vdjbdxdYK1oJMH66koVZE
Claude
8fd08aa56d