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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 5dd0f243ce
commit 1af0282e00
16 changed files with 268 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

7
apps/app_seeds/lib/i18n/ast.i18n.json
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@ -370,7 +370,12 @@
"nothingToShare": "Marca primero dalguna simiente pa regalar, trocar o vender",
"useLocation": "Usar el mio allugamientu averáu",
"locationFailed": "Nun se pudo consiguir el to allugamientu — comprueba que l'allugamientu ta activáu y el permisu concedíu",
"queued": "Guardáu — compartirémosles cuando tengas conexón"
"queued": "Guardáu — compartirémosles cuando tengas conexón",
"shareFailed": "Nun se pudo coneutar colos sirvidores — les tos granes nun se compartieron. Vuelvi a intentalo nun momentu.",
"rangeLabel": "Hasta ónde guetar",
"rangeNear": "Bien cerca",
"rangeArea": "Pela mio zona",
"rangeRegion": "La mio rexón"
},
"profile": {
"title": "El to perfil",

7
apps/app_seeds/lib/i18n/en.i18n.json
View file

@ -373,7 +373,12 @@
"nothingToShare": "Mark some seeds to give, swap or sell first",
"useLocation": "Use my approximate location",
"locationFailed": "Couldn't get your location — check that location is on and the permission is granted",
"queued": "Saved — we'll share these when you're connected"
"queued": "Saved — we'll share these when you're connected",
"shareFailed": "Couldn't reach the community servers — your seeds weren't shared. Try again in a moment.",
"rangeLabel": "How far to look",
"rangeNear": "Very close",
"rangeArea": "Around here",
"rangeRegion": "My region"
},
"profile": {
"title": "Your profile",

7
apps/app_seeds/lib/i18n/es.i18n.json
View file

@ -372,7 +372,12 @@
"nothingToShare": "Marca antes algunas semillas para regalar, cambiar o vender",
"useLocation": "Usar mi ubicación aproximada",
"locationFailed": "No se pudo obtener tu ubicación — comprueba que la ubicación está activada y el permiso concedido",
"queued": "Guardado — las compartiremos cuando tengas conexión"
"queued": "Guardado — las compartiremos cuando tengas conexión",
"shareFailed": "No se pudo conectar con los servidores — tus semillas no se compartieron. Inténtalo de nuevo en un momento.",
"rangeLabel": "Hasta dónde buscar",
"rangeNear": "Muy cerca",
"rangeArea": "Por mi zona",
"rangeRegion": "Mi región"
},
"profile": {
"title": "Tu perfil",

7
apps/app_seeds/lib/i18n/pt.i18n.json
View file

@ -369,7 +369,12 @@
"nothingToShare": "Marca primeiro algumas sementes para dar, trocar ou vender",
"useLocation": "Usar a minha localização aproximada",
"locationFailed": "Não foi possível obter a tua localização — verifica se a localização está ativa e a permissão concedida",
"queued": "Guardado — vamos partilhá-las quando tiveres ligação"
"queued": "Guardado — vamos partilhá-las quando tiveres ligação",
"shareFailed": "Não foi possível contactar os servidores — as tuas sementes não foram partilhadas. Tenta de novo daqui a pouco.",
"rangeLabel": "Até onde procurar",
"rangeNear": "Muito perto",
"rangeArea": "Pela minha zona",
"rangeRegion": "A minha região"
},
"profile": {
"title": "O teu perfil",

4
apps/app_seeds/lib/i18n/strings.g.dart
View file

@ -4,9 +4,9 @@
/// To regenerate, run: `dart run slang`
///
/// Locales: 4
/// Strings: 1444 (361 per locale)
/// Strings: 1464 (366 per locale)
///
/// Built on 2026-07-10 at 13:48 UTC
/// Built on 2026-07-10 at 13:52 UTC
// coverage:ignore-file
// ignore_for_file: type=lint, unused_import

20
apps/app_seeds/lib/i18n/strings_en.g.dart
View file

@ -1184,6 +1184,21 @@ class Translations$market$en {
/// en: 'Saved — we'll share these when you're connected'
String get queued => 'Saved — we\'ll share these when you\'re connected';
/// en: 'Couldn't reach the community servers — your seeds weren't shared. Try again in a moment.'
String get shareFailed => 'Couldn\'t reach the community servers — your seeds weren\'t shared. Try again in a moment.';
/// en: 'How far to look'
String get rangeLabel => 'How far to look';
/// en: 'Very close'
String get rangeNear => 'Very close';
/// en: 'Around here'
String get rangeArea => 'Around here';
/// en: 'My region'
String get rangeRegion => 'My region';
}
// Path: profile
@ -2096,6 +2111,11 @@ extension on Translations {
'market.useLocation' => 'Use my approximate location',
'market.locationFailed' => 'Couldn\'t get your location — check that location is on and the permission is granted',
'market.queued' => 'Saved — we\'ll share these when you\'re connected',
'market.shareFailed' => 'Couldn\'t reach the community servers — your seeds weren\'t shared. Try again in a moment.',
'market.rangeLabel' => 'How far to look',
'market.rangeNear' => 'Very close',
'market.rangeArea' => 'Around here',
'market.rangeRegion' => 'My region',
'profile.title' => 'Your profile',
'profile.name' => 'Display name',
'profile.nameHint' => 'How others see you',

10
apps/app_seeds/lib/i18n/strings_es.g.dart
View file

@ -647,6 +647,11 @@ class _Translations$market$es extends Translations$market$en {
@override String get useLocation => 'Usar mi ubicación aproximada';
@override String get locationFailed => 'No se pudo obtener tu ubicación — comprueba que la ubicación está activada y el permiso concedido';
@override String get queued => 'Guardado — las compartiremos cuando tengas conexión';
@override String get shareFailed => 'No se pudo conectar con los servidores — tus semillas no se compartieron. Inténtalo de nuevo en un momento.';
@override String get rangeLabel => 'Hasta dónde buscar';
@override String get rangeNear => 'Muy cerca';
@override String get rangeArea => 'Por mi zona';
@override String get rangeRegion => 'Mi región';
}
// Path: profile
@ -1388,6 +1393,11 @@ extension on TranslationsEs {
'market.useLocation' => 'Usar mi ubicación aproximada',
'market.locationFailed' => 'No se pudo obtener tu ubicación — comprueba que la ubicación está activada y el permiso concedido',
'market.queued' => 'Guardado — las compartiremos cuando tengas conexión',
'market.shareFailed' => 'No se pudo conectar con los servidores — tus semillas no se compartieron. Inténtalo de nuevo en un momento.',
'market.rangeLabel' => 'Hasta dónde buscar',
'market.rangeNear' => 'Muy cerca',
'market.rangeArea' => 'Por mi zona',
'market.rangeRegion' => 'Mi región',
'profile.title' => 'Tu perfil',
'profile.name' => 'Nombre',
'profile.nameHint' => 'Cómo te ven los demás',

10
apps/app_seeds/lib/i18n/strings_pt.g.dart
View file

@ -644,6 +644,11 @@ class _Translations$market$pt extends Translations$market$en {
@override String get useLocation => 'Usar a minha localização aproximada';
@override String get locationFailed => 'Não foi possível obter a tua localização — verifica se a localização está ativa e a permissão concedida';
@override String get queued => 'Guardado — vamos partilhá-las quando tiveres ligação';
@override String get shareFailed => 'Não foi possível contactar os servidores — as tuas sementes não foram partilhadas. Tenta de novo daqui a pouco.';
@override String get rangeLabel => 'Até onde procurar';
@override String get rangeNear => 'Muito perto';
@override String get rangeArea => 'Pela minha zona';
@override String get rangeRegion => 'A minha região';
}
// Path: profile
@ -1382,6 +1387,11 @@ extension on TranslationsPt {
'market.useLocation' => 'Usar a minha localização aproximada',
'market.locationFailed' => 'Não foi possível obter a tua localização — verifica se a localização está ativa e a permissão concedida',
'market.queued' => 'Guardado — vamos partilhá-las quando tiveres ligação',
'market.shareFailed' => 'Não foi possível contactar os servidores — as tuas sementes não foram partilhadas. Tenta de novo daqui a pouco.',
'market.rangeLabel' => 'Até onde procurar',
'market.rangeNear' => 'Muito perto',
'market.rangeArea' => 'Pela minha zona',
'market.rangeRegion' => 'A minha região',
'profile.title' => 'O teu perfil',
'profile.name' => 'Nome',
'profile.nameHint' => 'Como os outros te veem',

11
apps/app_seeds/lib/services/discovery_area.dart Normal file
View file

@ -0,0 +1,11 @@
/// The geohash prefix to search offers by, given the user's coarse [area] and
/// the chosen [precision] (a prefix length; see
/// `SocialSettings.searchPrecision`).
///
/// Publishing emits a NIP-52 prefix ladder from the (already coarse) area, so a
/// SHORTER search prefix still matches finer offers. Searching at the full area
/// length only matches the exact ±2.4 km cell — which is why two neighbours in
/// adjacent cells used to find nothing. We recorten the area to [precision] (but
/// never beyond its own length) so "your zone" is genuinely a zone, not a point.
String searchPrefix(String area, int precision) =>
area.substring(0, area.length < precision ? area.length : precision);

32
apps/app_seeds/lib/services/social_settings.dart
View file

@ -16,11 +16,24 @@ class SocialSettings {
static const _areaKey = 'tane.social.area_geohash';
static const _relaysKey = 'tane.social.relays';
static const _searchPrecisionKey = 'tane.social.search_precision';
/// How wide "your zone" searches, as a geohash prefix length: 5 ≈ ±2.4 km
/// ("very close"), 4 ≈ ±20 km ("around here"), 3 ≈ ±78 km ("my region").
/// Publishing always emits the full prefix ladder, so a coarser search still
/// matches finer offers — the default is deliberately wide so a still-sparse
/// network shows something.
static const int minSearchPrecision = 3;
static const int maxSearchPrecision = 5;
static const int defaultSearchPrecision = 4;
/// Community servers used automatically so sharing works from the first
/// launch. The relay pool skips any that are unreachable, so a dead one never
/// breaks the market; the user never has to know these exist.
/// breaks the market; the user never has to know these exist. The Comunes
/// relay comes first as the reliable, non-commercial home; the public ones
/// are backup.
static const List<String> defaultRelays = [
'wss://relay.comunes.org',
'wss://nos.lol',
'wss://relay.damus.io',
'wss://relay.primal.net',
@ -47,6 +60,23 @@ class SocialSettings {
urls.map((u) => u.trim()).where((u) => u.isNotEmpty).join('\n'),
);
/// How wide to search — a geohash prefix length in [minSearchPrecision,
/// maxSearchPrecision]. Defaults (and falls back on any garbage) to
/// [defaultSearchPrecision].
Future<int> searchPrecision() async {
final raw = await _store.read(_searchPrecisionKey);
final value = int.tryParse(raw ?? '');
if (value == null) return defaultSearchPrecision;
return _clampPrecision(value);
}
Future<void> setSearchPrecision(int precision) =>
_store.write(_searchPrecisionKey, '${_clampPrecision(precision)}');
int _clampPrecision(int p) => p < minSearchPrecision
? minSearchPrecision
: (p > maxSearchPrecision ? maxSearchPrecision : p);
/// Whether the social layer has enough config to attempt going online.
Future<bool> get isConfigured async =>
(await relayUrls()).isNotEmpty && (await areaGeohash()).isNotEmpty;

40
apps/app_seeds/lib/ui/market_screen.dart
View file

@ -6,6 +6,7 @@ import 'package:go_router/go_router.dart';
import '../data/variety_repository.dart';
import '../i18n/strings.g.dart';
import '../services/coarse_location.dart';
import '../services/discovery_area.dart';
import '../services/offer_outbox.dart';
import '../services/social_service.dart';
import '../services/social_settings.dart';
@ -81,7 +82,10 @@ class _MarketScreenState extends State<MarketScreen> {
areaGeohash: area,
);
}
if (mounted) await cubit.discover(area);
if (mounted) {
final precision = await widget.settings.searchPrecision();
if (mounted) await cubit.discover(searchPrefix(area, precision));
}
}
}
@ -132,8 +136,14 @@ class _MarketScreenState extends State<MarketScreen> {
);
if (!mounted) return;
await widget.outbox?.remove(ids); // published now, so unpark any duplicates
messenger.showSnackBar(SnackBar(content: Text(t.market.sharedCount(n: count))));
await cubit.discover(area); // refresh — now including the just-shared lots
// count == 0 with lots to share means every relay refused — say so plainly
// rather than "shared 0", which reads like success.
messenger.showSnackBar(SnackBar(
content: Text(count == 0 ? t.market.shareFailed : t.market.sharedCount(n: count)),
));
final precision = await widget.settings.searchPrecision();
if (!mounted) return;
await cubit.discover(searchPrefix(area, precision)); // refresh incl. just-shared
}
@override
@ -527,6 +537,7 @@ class _ConfigSheetState extends State<_ConfigSheet> {
bool _loading = true;
bool _locationBusy = false;
String? _locationError;
int _precision = SocialSettings.defaultSearchPrecision;
@override
void initState() {
@ -537,12 +548,14 @@ class _ConfigSheetState extends State<_ConfigSheet> {
Future<void> _load() async {
_area.text = await widget.settings.areaGeohash();
_servers.text = (await widget.settings.relayUrls()).join('\n');
_precision = await widget.settings.searchPrecision();
if (mounted) setState(() => _loading = false);
}
Future<void> _save() async {
await widget.settings.setAreaGeohash(_area.text);
await widget.settings.setRelayUrls(_servers.text.split('\n'));
await widget.settings.setSearchPrecision(_precision);
if (mounted) Navigator.of(context).pop(true);
}
@ -654,6 +667,27 @@ class _ConfigSheetState extends State<_ConfigSheet> {
),
],
),
const SizedBox(height: 16),
Align(
alignment: AlignmentDirectional.centerStart,
child: Text(
t.market.rangeLabel,
style: const TextStyle(fontSize: 13, color: seedMuted),
),
),
const SizedBox(height: 8),
SegmentedButton<int>(
key: const Key('market.range'),
segments: [
ButtonSegment(value: 5, label: Text(t.market.rangeNear)),
ButtonSegment(value: 4, label: Text(t.market.rangeArea)),
ButtonSegment(value: 3, label: Text(t.market.rangeRegion)),
],
selected: {_precision},
showSelectedIcon: false,
onSelectionChanged: (s) =>
setState(() => _precision = s.first),
),
const SizedBox(height: 8),
Theme(
data: Theme.of(context)

22
apps/app_seeds/test/services/discovery_area_test.dart Normal file
View file

@ -0,0 +1,22 @@
import 'package:flutter_test/flutter_test.dart';
import 'package:tane/services/discovery_area.dart';
void main() {
test('coarsens the area to the search precision', () {
expect(searchPrefix('sp3e9', 4), 'sp3e');
expect(searchPrefix('sp3e9', 3), 'sp3');
expect(searchPrefix('sp3e9', 5), 'sp3e9');
});
test('never asks for more than the area actually has', () {
expect(searchPrefix('sp', 4), 'sp');
expect(searchPrefix('', 4), '');
});
test('two neighbours in adjacent 5-char cells share a 4-char prefix', () {
// The crux of the bug: sp3e9 and sp3e8 are different ±2.4 km cells, but
// searching at precision 4 collapses both to 'sp3e', so they find each
// other. Publishing emits the ladder down to 'sp3e', so this matches.
expect(searchPrefix('sp3e9', 4), searchPrefix('sp3e8', 4));
});
}

24
apps/app_seeds/test/services/social_settings_test.dart
View file

@ -47,4 +47,28 @@ void main() {
await settings.setAreaGeohash('sp3e9');
expect(await settings.isConfigured, isTrue);
});
test('search precision defaults to 4 (a wide "around here")', () async {
expect(await settings.searchPrecision(), 4);
});
test('stores and reads back the search precision', () async {
await settings.setSearchPrecision(3);
expect(await settings.searchPrecision(), 3);
await settings.setSearchPrecision(5);
expect(await settings.searchPrecision(), 5);
});
test('search precision is clamped to the 3–5 range', () async {
await settings.setSearchPrecision(1);
expect(await settings.searchPrecision(), 3);
await settings.setSearchPrecision(9);
expect(await settings.searchPrecision(), 5);
});
test('a corrupt stored precision falls back to the default', () async {
final store = FakeSecretStore();
await store.write('tane.social.search_precision', 'oops');
expect(await SocialSettings(store).searchPrecision(), 4);
});
}

26
apps/app_seeds/test/state/offers_cubit_test.dart
View file

@ -4,6 +4,7 @@ import 'package:commons_core/commons_core.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:tane/data/variety_repository.dart';
import 'package:tane/db/enums.dart';
import 'package:tane/services/discovery_area.dart';
import 'package:tane/services/offer_mapper.dart';
import 'package:tane/services/offer_outbox.dart';
import 'package:tane/state/offers_cubit.dart';
@ -152,6 +153,31 @@ void main() {
await cubit.close();
});
test('a neighbour in an adjacent cell is found via the coarsened prefix',
() async {
// Regression: A publishes at 'sp3e9', B lives one ±2.4 km cell over at
// 'sp3e8'. Searching B's full 5-char area misses it; searching the
// precision-4 prefix ('sp3e') finds it, because publish emits the ladder.
final transport = FakeOfferTransport();
await transport.publish(OfferMapper.fromSharedLot(
lotId: 'lot-1',
authorPubkeyHex: 'ab' * 32,
summary: 'Tomate rosa',
sharing: OfferStatus.shared,
areaGeohash: 'sp3e9',
));
final cubit = OffersCubit(transport);
await cubit.discover(searchPrefix('sp3e8', 4)); // 'sp3e'
await pumpEventQueue();
expect(cubit.state.offers, hasLength(1));
await cubit.discover('sp3e8'); // full precision → the old, broken behaviour
await pumpEventQueue();
expect(cubit.state.offers, isEmpty);
await cubit.close();
});
test('a different area finds nothing', () async {
final transport = FakeOfferTransport();
await transport.publish(OfferMapper.fromSharedLot(

22
apps/app_seeds/test/ui/market_screen_test.dart
View file

@ -91,6 +91,28 @@ void main() {
expect(find.text('Retry'), findsOneWidget); // can't-reach state offers retry
});
testWidgets('the range selector persists the chosen search precision',
(tester) async {
final social = await SocialService.fromRootSeedHex('00' * 32);
final settings = SocialSettings(InMemorySecretStore());
await settings.setRelayUrls(const []); // offline: don't hit the network
await tester.pumpWidget(_wrapMarket(social, settings));
await tester.pumpAndSettle();
await tester.tap(find.byKey(const Key('market.config')));
await tester.pumpAndSettle();
// Defaults to the wide "Around here" (precision 4); narrow to "My region".
expect(await settings.searchPrecision(), 4);
await tester.tap(find.text('My region'));
await tester.pumpAndSettle();
await tester.tap(find.byKey(const Key('market.save')));
await tester.pumpAndSettle();
expect(await settings.searchPrecision(), 3);
});
testWidgets('"use my location" fills the area with a coarse geohash',
(tester) async {
final social = await SocialService.fromRootSeedHex('00' * 32);

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);