Fix retry flow and contact filters

test/providers/contacts_provider_test.dart

@@ -458,6 +458,24 @@ void main() {
       expect(updated.routeCanonicalText, 'AABB,CCDD');
     });
 
+    test('stores inferred fallback gps when route is set locally', () {
+      final route = ContactRouteCodec.parse('AABB,CCDD');
+      const fallback = LatLng(46.1001, 14.5002);
+
+      provider.setContactRouteLocal(
+        publicKey,
+        signedEncodedPathLen: route.signedEncodedPathLen,
+        paddedPathBytes: route.paddedPathBytes,
+        inferredFallbackLocation: fallback,
+      );
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.displayLocation, isNotNull);
+      expect(updated.displayLocation!.latitude, closeTo(46.1001, 0.000001));
+      expect(updated.displayLocation!.longitude, closeTo(14.5002, 0.000001));
+      expect(updated.advertHistory, isNotEmpty);
+    });
+
     test('resetContactRouteLocal clears route state', () {
       final route = ContactRouteCodec.parse('AA,BB,CC');
       provider.setContactRouteLocal(
@@ -576,46 +594,49 @@ void main() {
       expect(distanceMeters, closeTo(100.0, 8.0));
     });
 
-    test('does not infer a fallback location when the contact advertises one', () {
-      final repeaterKey = Uint8List.fromList([
-        0xCC,
-        0xDD,
-        0x10,
-        0x11,
-        0x12,
-        0x13,
-        ...List<int>.generate(26, (index) => index + 20),
-      ]);
-      provider.addOrUpdateContact(
-        createContact(
-          key: repeaterKey,
-          type: ContactType.repeater,
-          name: 'Relay Alpha',
-        ),
-      );
+    test(
+      'does not infer a fallback location when the contact advertises one',
+      () {
+        final repeaterKey = Uint8List.fromList([
+          0xCC,
+          0xDD,
+          0x10,
+          0x11,
+          0x12,
+          0x13,
+          ...List<int>.generate(26, (index) => index + 20),
+        ]);
+        provider.addOrUpdateContact(
+          createContact(
+            key: repeaterKey,
+            type: ContactType.repeater,
+            name: 'Relay Alpha',
+          ),
+        );
 
-      final targetKey = createPublicKey(121);
-      final route = ContactRouteCodec.parse('AABB,CCDD');
-      provider.addOrUpdateContact(
-        Contact(
-          publicKey: targetKey,
-          type: ContactType.chat,
-          flags: 0,
-          outPathLen: route.signedEncodedPathLen,
-          outPath: route.paddedPathBytes,
-          advName: 'Has Advert',
-          lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
-          advLat: (45.1234 * 1e6).toInt(),
-          advLon: (13.8765 * 1e6).toInt(),
-          lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
-        ),
-      );
+        final targetKey = createPublicKey(121);
+        final route = ContactRouteCodec.parse('AABB,CCDD');
+        provider.addOrUpdateContact(
+          Contact(
+            publicKey: targetKey,
+            type: ContactType.chat,
+            flags: 0,
+            outPathLen: route.signedEncodedPathLen,
+            outPath: route.paddedPathBytes,
+            advName: 'Has Advert',
+            lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+            advLat: (45.1234 * 1e6).toInt(),
+            advLon: (13.8765 * 1e6).toInt(),
+            lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          ),
+        );
 
-      final updated = provider.findContactByKey(targetKey)!;
-      expect(updated.displayLocation, isNotNull);
-      expect(updated.displayLocation!.latitude, closeTo(45.1234, 0.000001));
-      expect(updated.displayLocation!.longitude, closeTo(13.8765, 0.000001));
-    });
+        final updated = provider.findContactByKey(targetKey)!;
+        expect(updated.displayLocation, isNotNull);
+        expect(updated.displayLocation!.latitude, closeTo(45.1234, 0.000001));
+        expect(updated.displayLocation!.longitude, closeTo(13.8765, 0.000001));
+      },
+    );
   });
 
   group('ContactsProvider.updateFastGps', () {

test/services/contact_route_resolver_test.dart

@@ -0,0 +1,143 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/services/contact_route_resolver.dart';
+
+void main() {
+  test('prefers known repeater route when available', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final routedRepeater = _contact(
+      name: 'Routed',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.15,
+      lon: 14.60,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [routedRepeater],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.tokens, [
+      'AA',
+      routedRepeater.publicKeyHex.substring(0, 2).toUpperCase(),
+    ]);
+  });
+
+  test('falls back to location-only repeaters', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final nearRepeater = _contact(
+      name: 'Near',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.08,
+      lon: 14.55,
+    );
+    final farRepeater = _contact(
+      name: 'Far',
+      type: ContactType.repeater,
+      seed: 11,
+      lat: 46.40,
+      lon: 15.10,
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [nearRepeater, farRepeater],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.selectedContacts.first.displayName, 'Near');
+  });
+
+  test('for known routes prefers anchor closest to the chain end', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final chainHop = _contact(
+      name: 'Chain Hop',
+      type: ContactType.repeater,
+      seed: 0xAA,
+      lat: 46.01,
+      lon: 14.51,
+    );
+    final nearAnchor = _contact(
+      name: 'Near Anchor',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.03,
+      lon: 14.53,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+    final farAnchor = _contact(
+      name: 'Far Anchor',
+      type: ContactType.repeater,
+      seed: 11,
+      lat: 46.18,
+      lon: 14.68,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [chainHop, nearAnchor, farAnchor],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.selectedContacts.last.displayName, 'Near Anchor');
+  });
+}
+
+Contact _contact({
+  required String name,
+  required ContactType type,
+  required int seed,
+  required double lat,
+  required double lon,
+  int signedPathLen = -1,
+  Uint8List? outPath,
+}) {
+  final publicKey = Uint8List(32)..fillRange(0, 32, seed);
+  return Contact(
+    publicKey: publicKey,
+    type: type,
+    flags: 0,
+    outPathLen: signedPathLen,
+    outPath: outPath ?? Uint8List(64),
+    advName: name,
+    lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    advLat: (lat * 1e6).round(),
+    advLon: (lon * 1e6).round(),
+    lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+  );
+}