fix(mobile/ios): configure push gateway URL

Co-authored-by: Tom Brow <tomb@block.xyz>
Signed-off-by: Tom Brow <tomb@block.xyz>

mobile/.env.json.example

@@ -1,4 +1,5 @@
 {
   "BUZZ_RELAY_URL": "http://localhost:3000",
+  "BUZZ_PUSH_GATEWAY_URL": "http://localhost:8080",
   "BUZZ_DEV_PUBKEY": "<your-hex-pubkey-here>"
 }

mobile/ios/Runner/AppDelegate.swift

@@ -252,12 +252,13 @@ import UserNotifications
       guard let arguments = call.arguments as? [String: Any],
         let relayText = arguments["relayUrl"] as? String,
         let relayURL = URL(string: relayText),
-        let gatewayURL = URL(string: "http://localhost:8080")
+        let gatewayText = arguments["gatewayUrl"] as? String,
+        let gatewayURL = URL(string: gatewayText)
       else {
         result(
           FlutterError(
             code: "invalid_arguments",
-            message: "Development push enrollment requires relayUrl.",
+            message: "Development push enrollment requires relayUrl and gatewayUrl.",
             details: nil
           )
         )

mobile/lib/shared/push/debug_push_lease_bootstrap.dart

@@ -57,7 +57,7 @@ class DebugPushLeaseBootstrap extends HookConsumerWidget {
     SignedEventRelay relay,
   ) async {
     final descriptor = await fetchBuzzPushLeaseDescriptor(config.baseUrl);
-    final grant = await enrollBuzzDevPush(config.wsUrl);
+    final grant = await enrollBuzzDevPush(config.wsUrl, Env.pushGatewayUrl);
     if (grant.relayOrigin != descriptor.origin) {
       throw StateError(
         'Endpoint grant origin ${grant.relayOrigin} does not match descriptor origin ${descriptor.origin}',

mobile/lib/shared/push/push_bridge.dart

@@ -83,7 +83,10 @@ Future<List<BuzzPushEndpointGrant>> readBuzzPushEndpointGrants() async {
   }
 }
 
-Future<BuzzPushEndpointGrant> enrollBuzzDevPush(String relayUrl) async {
+Future<BuzzPushEndpointGrant> enrollBuzzDevPush(
+  String relayUrl,
+  String gatewayUrl,
+) async {
   if (!kDebugMode) {
     throw UnsupportedError(
       'Development push enrollment is unavailable outside debug builds.',
@@ -91,7 +94,7 @@ Future<BuzzPushEndpointGrant> enrollBuzzDevPush(String relayUrl) async {
   }
   final raw = await _channel.invokeMapMethod<dynamic, dynamic>(
     'devEnrollPush',
-    {'relayUrl': relayUrl},
+    {'relayUrl': relayUrl, 'gatewayUrl': gatewayUrl},
   );
   if (raw == null) {
     throw StateError('Native development push enrollment returned no grant.');

mobile/lib/shared/relay/relay_provider.dart

@@ -62,7 +62,8 @@ class RelayConfig {
 /// Compile-time environment config via --dart-define.
 ///
 /// Run with:
-///   flutter run --dart-define=BUZZ_RELAY_URL=http://localhost:3000
+///   flutter run --dart-define=BUZZ_RELAY_URL=http://localhost:3000 \
+///     --dart-define=BUZZ_PUSH_GATEWAY_URL=http://localhost:8080
 ///
 /// Or create a `.env.json` and use --dart-define-from-file=.env.json
 class Env {
@@ -70,6 +71,10 @@ class Env {
     'BUZZ_RELAY_URL',
     defaultValue: 'http://localhost:3000',
   );
+  static const pushGatewayUrl = String.fromEnvironment(
+    'BUZZ_PUSH_GATEWAY_URL',
+    defaultValue: 'http://localhost:8080',
+  );
 }
 
 class RelayConfigNotifier extends Notifier<RelayConfig> {

mobile/test/shared/push/push_bridge_test.dart

@@ -1,4 +1,5 @@
 import 'package:buzz/shared/push/push_bridge.dart';
+import 'package:buzz/shared/relay/relay_provider.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -63,16 +64,17 @@ void main() {
   });
 
   test(
-    'debug enrollment invokes native driver then refreshes grants',
+    'debug enrollment carries the configured relay and gateway URLs',
     () async {
       debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
       final methods = <String>[];
+      final enrollmentArguments = <Object?>[];
       final messenger =
           TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger;
       messenger.setMockMethodCallHandler(_channel, (call) async {
         methods.add(call.method);
         if (call.method == 'devEnrollPush') {
-          expect(call.arguments, {'relayUrl': 'wss://relay.example/'});
+          enrollmentArguments.add(call.arguments);
           return _grantMap('new-grant');
         }
         if (call.method == 'endpointGrants') {
@@ -81,14 +83,41 @@ void main() {
         fail('Unexpected method ${call.method}');
       });
 
-      final grant = await enrollBuzzDevPush('wss://relay.example/');
+      final firstGrant = await enrollBuzzDevPush(
+        'wss://relay.example/',
+        'https://gateway-one.example/',
+      );
+      final secondGrant = await enrollBuzzDevPush(
+        'wss://relay.example/',
+        'https://gateway-two.example/',
+      );
 
-      expect(grant.endpointGrant, 'new-grant');
-      expect(methods, ['devEnrollPush', 'endpointGrants']);
+      expect(firstGrant.endpointGrant, 'new-grant');
+      expect(secondGrant.endpointGrant, 'new-grant');
+      expect(enrollmentArguments, [
+        {
+          'relayUrl': 'wss://relay.example/',
+          'gatewayUrl': 'https://gateway-one.example/',
+        },
+        {
+          'relayUrl': 'wss://relay.example/',
+          'gatewayUrl': 'https://gateway-two.example/',
+        },
+      ]);
+      expect(methods, [
+        'devEnrollPush',
+        'endpointGrants',
+        'devEnrollPush',
+        'endpointGrants',
+      ]);
       expect(pushEndpointGrants.value.single.endpointGrant, 'new-grant');
     },
   );
 
+  test('development push gateway uses the localhost compiled default', () {
+    expect(Env.pushGatewayUrl, 'http://localhost:8080');
+  });
+
   test('persists the acknowledged push lease generation', () async {
     debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
     final methods = <String>[];