Rename NodeId to NodeAddr and npub to pubkey throughout documentation
and source code for consistency with the established identity model.
Add FIPS API vs IPv6 adapter overview to session protocol document.
Add transport address terminology note to wire protocol document.
Add comprehensive wire format diagrams with byte offsets, field sizes,
and concrete examples to three protocol documents:
fips-wire-protocol.md (Appendix A):
- Encrypted frame (0x00) with plaintext structure breakdown
- Noise IK msg1/msg2 with payload breakdown
- Complete handshake flow diagram
fips-gossip-protocol.md (Appendix A):
- TreeAnnounce with ancestry entry structure and size table
- FilterAnnounce with bloom filter layout
- LookupRequest/LookupResponse with examples
- Message flow showing packet nesting
fips-session-protocol.md (§8):
- SessionSetup, SessionAck, DataPacket, CoordsRequired, PathBroken
- Full nested packet example showing link + session layers
fips-routing.md:
- Refactored Part 4 to "Route Cache Management"
- Moved wire format content to fips-session-protocol.md
Session protocol (fips-session-protocol.md):
- Clarified DNS entry point applies to IP-based apps; native FIPS uses npub
- Updated transport failover examples (UDP → WiFi, WiFi → LTE)
- Added roaming description to session independence section
- Expanded §5 with coords-on-demand mechanism for route cache recovery
- Added Noise IK vs XK privacy tradeoff note to §6
Routing (fips-routing.md):
- DataPacket now has optional coordinates (COORDS_PRESENT flag)
- Updated handle_data_packet to cache coords from packets
- Sender state machine: WARM/COLD based on CoordsRequired errors
- Updated packet type summary table
Architecture (fips-architecture.md):
- Fixed cross-references to session protocol sections
Design change: Session layer now uses Noise IK pattern (previously KK),
matching the link layer. Rationale: initiator knows destination npub,
responder learns initiator identity from handshake - same asymmetry as
link connections.
Document consistency fixes:
- Auth* events → Noise IK msg1/msg2 terminology in state machines
- PeerId → NodeId in routing code examples
- BloomUpdate → FilterAnnounce terminology
- Updated cross-references and tables
Johnathan Corgan