Relay-strategy hardening (network-trust §3): don't hang on one relay.
- NostrChannel interface: what the transports need (sign, publish, subscribe,
reqOnce). Implemented by NostrConnection (single relay) and the new RelayPool.
- RelayPool: connects to all configured relays (skips unreachable ones, throws
only when none are reachable), publishes to every live relay (accepted if any
accepts), merges discovery deduped by event id, and survives a relay dropping.
- Transports now depend on NostrChannel, not a concrete connection.
- SocialService.openSession takes ALL configured relays (was relays.first);
createOffersCubit passes the whole list.
commons_core 63 tests green (3 new pool tests over two in-process relays);
app_seeds social/market 18 green.
Pure Dart lat/lon -> low-precision geohash (public-domain algorithm), the piece
the coarse-area capture needs so people never type a code. Precision-controlled
(5 chars ~ ±2.4 km). Tested against the canonical u4pruydqqvj vector + prefix/
proximity properties. 5 tests green.
Second production slice: the concrete Nostr backend on the shared connection,
using the vetted nostr package's crypto (NIP-44 spec-vector tested, gift wrap).
- NostrConnection: one dart:io WebSocket + identity + EVENT/OK, REQ/EOSE via
the library's Event/Filter/Request. Pure Dart, no Flutter.
- NostrOfferTransport (NIP-99 kind 30402) + Nip99Codec: geohash coarsened to a
NIP-52 prefix ladder on the wire; Offer stays inventory/location-agnostic.
- NostrMessageTransport (NIP-17): send/inbox via the library's DirectMessage
gift-wrap onion.
- NostrTrustTransport (custom addressable kind 30777): certify/revoke/discover.
- MiniRelay test support + integration tests: offers, messaging (metadata
privacy), WoT membership + revoke, and trust-filters-offers — all over ONE
shared connection, hermetic in-process relay.
Renamed the core offer lifecycle enum OfferStatus -> OfferLifecycle to avoid
colliding with app_seeds' sharing-intent OfferStatus (no Block 1 code touched;
app_seeds analyzes clean, 0 errors). commons_core: 55 tests green.
