📝 Refine comments for clarity and readability

lib/presentation_layer/providers/app_update_provider.dart

@@ -1,18 +1,25 @@
-import 'package:camelus/data_layer/repositories/app_update_repository_impl.dart';
+import 'package:camelus/data_layer/repositories/app_update_repository_impl.dart'; 
 import 'package:camelus/domain_layer/repositories/app_update_repository.dart';
 import 'package:camelus/domain_layer/usecases/check_app_update.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:http/http.dart' as http;
 
 import '../../data_layer/data_sources/http_request_data_source.dart';
 
+// Provider for checking app updates.
+//  interacts with the AppUpdateRepository to check for app updates.
 final appUpdateProvider = Provider<CheckAppUpdate>((ref) {
+  // Creating an HTTP client for making requests to the data source.
   final http.Client client = http.Client();
+
+  // Creating an instance of HttpRequestDataSource, which handles HTTP requests.
   final HttpRequestDataSource dataSource = HttpRequestDataSource(client);
+
   final AppUpdateRepository appUpdateRepository =
       AppUpdateRepositoryImpl(httpJsonDataSource: dataSource);
 
   final CheckAppUpdate appUpdate = CheckAppUpdate(appUpdateRepository);
 
+  // Returning the CheckAppUpdate instance, which will be used by consumers.
   return appUpdate;
 });

lib/presentation_layer/providers/event_verifier.dart

@@ -1,25 +1,32 @@
-import 'package:ndk/ndk.dart';
+import 'package:ndk/ndk.dart'; 
 import 'package:ndk/entities.dart' as ndk_entities;
 import 'package:riverpod/riverpod.dart';
 
+// Provider for the EventVerifier, which provides an instance of a specific event verifier.
+// Currently set to use the RustEventVerifier.
 final eventVerifierProvider = Provider<EventVerifier>((ref) {
+  // Creating instances of different EventVerifiers (Bip340, Mock, Rust).
   final EventVerifier eventVerifier = Bip340EventVerifier();
   final EventVerifier mockEventVerifier = MockEventVerifier();
   final RustEventVerifier rustEventVerifier = RustEventVerifier();
 
+
   return rustEventVerifier;
 });
 
+/// This mock verifier returns a fixed result, controlled by the constructor.
 class MockEventVerifier implements EventVerifier {
   bool _result = true;
 
-  /// If [result] is false, [verify] will always return false. Default is true.
+
+  /// The result parameter controls whether verify always returns true or false.
   MockEventVerifier({bool result = true}) {
-    _result = result;
+    _result = result; 
   }
 
+  /// Verifies the event, returning a fixed result.
   @override
   Future<bool> verify(ndk_entities.Nip01Event event) async {
-    return _result;
+    return _result; // Return the mock result 
   }
 }

lib/presentation_layer/providers/following_provider.dart

@@ -1,4 +1,4 @@
-import 'package:camelus/data_layer/repositories/follow_repository_impl.dart';
+import 'package:camelus/data_layer/repositories/follow_repository_impl.dart'; 
 import 'package:camelus/domain_layer/repositories/follow_repository.dart';
 import 'package:camelus/domain_layer/usecases/follow.dart';
 import 'package:camelus/presentation_layer/providers/event_signer_provider.dart';
@@ -9,6 +9,8 @@ import '../../data_layer/data_sources/dart_ndk_source.dart';
 import 'event_verifier.dart';
 import 'ndk_provider.dart';
 
+// Provider for managing the "Follow" use case.
+// which interacts with the FollowRepository to manage follow actions.
 final followingProvider = Provider<Follow>((ref) {
   final ndk = ref.watch(ndkProvider);
 
@@ -18,14 +20,17 @@ final followingProvider = Provider<Follow>((ref) {
 
   final DartNdkSource dartNdkSource = DartNdkSource(ndk);
 
+  // Creates an instance of FollowRepository, passing the data source, event verifier and event signer.
   final FollowRepository _followRepository = FollowRepositoryImpl(
     dartNdkSource: dartNdkSource,
     eventVerifier: eventVerifier,
     eventSigner: eventSigner,
   );
 
+  // Watches the eventSignerProvider again to get the signer for the user's public key.
   final signerP = ref.watch(eventSignerProvider);
 
+  // Creates an instance of the Follow use case, passing the follow repository and user's public key.
   final follow = Follow(
     followRepository: _followRepository,
     selfPubkey: signerP?.getPublicKey(),