pub const RELAY_AUTH_DOMAIN: &[u8] = b"huddle-relay-auth-v1";Expand description
huddle 1.1.4: domain-separation prefix for the relay client-auth
challenge-response. The client signs RELAY_AUTH_DOMAIN || nonce with its
Ed25519 identity key; the relay verifies that signature against the
presented pubkey and checks the pubkey hashes to the claimed fingerprint.
The distinct domain tag keeps this signature from ever being mistaken for a
SignedRoomMessage envelope (which commits a different tag).