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fix(market): search your zone by a coarse prefix, not the exact cell

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Discovery searched the full 5-char geohash (~2.4 km) with an exact Nostr tag
match, so two devices in adjacent cells never found each other even though
publish emits the full NIP-52 prefix ladder. Search now coarsens the area to a
configurable precision (SocialSettings.searchPrecision, default 4 ~20 km) via
searchPrefix(), with a human-worded 'how far' selector (Very close / Around
here / My region -> 5/4/3) in the market setup sheet.

Also: surface a clear 'couldn't reach the servers' message when no relay
accepts a share (instead of 'shared 0'), and add wss://relay.comunes.org as the
first default relay (reliable community home; public relays are backup).

Tests: settings precision (default/clamp/roundtrip), searchPrefix helper,
neighbour-cell discovery regression (offers_cubit + commons_core nostr
transports), and the range-selector widget test.
This commit is contained in:
vjrj 2026-07-10 16:12:38 +02:00
parent 1fb8e37536
commit 97b9223cb2
16 changed files with 268 additions and 10 deletions
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29
packages/commons_core/test/social/nostr_transports_test.dart
View file

@ -48,6 +48,35 @@ void main() {
await bobT.close();
});
test('a coarser search prefix matches, an adjacent full cell does not',
() async {
// Alice publishes at 'sp3e9'. A neighbour searching the precision-4
// prefix 'sp3e' finds her (the publish ladder emits 'sp3e'); searching
// the adjacent full cell 'sp3e8' finds nothing (exact tag match).
final alice = await idFor(1);
final bob = await idFor(2);
final aliceT = NostrOfferTransport(await connFor(alice));
final bobT = NostrOfferTransport(await connFor(bob));
await aliceT.publish(Offer(
id: 'tomate-1',
authorPubkeyHex: alice.publicKeyHex,
summary: 'Tomate rosa',
type: OfferType.gift,
approxGeohash: 'sp3e9',
));
final wide = await bobT
.discoverUntilEose(const DiscoveryQuery(geohashPrefix: 'sp3e'));
expect(wide, hasLength(1));
final adjacent = await bobT
.discoverUntilEose(const DiscoveryQuery(geohashPrefix: 'sp3e8'));
expect(adjacent, isEmpty);
await aliceT.close();
await bobT.close();
});
test('exact geohash never leaves the device (coarsened on the wire)',
() async {
final alice = await idFor(1);