fix: Adds support for SharedPreferencesAsync

packages/supabase_flutter/lib/src/local_storage.dart

@@ -61,22 +61,38 @@ class EmptyLocalStorage extends LocalStorage {
   Future<void> persistSession(persistSessionString) async {}
 }
 
-/// A [LocalStorage] implementation that implements SharedPreferences as the
+/// A [LocalStorage] implementation that implements SharedPreferencesAsync as the
 /// storage method.
 class SharedPreferencesLocalStorage extends LocalStorage {
-  late final SharedPreferences _prefs;
+  late final SharedPreferencesAsync _prefs;
 
   SharedPreferencesLocalStorage({required this.persistSessionKey});
 
   final String persistSessionKey;
+
   static const _useWebLocalStorage =
       kIsWeb && bool.fromEnvironment("dart.library.js_interop");
 
   @override
   Future<void> initialize() async {
     if (!_useWebLocalStorage) {
       WidgetsFlutterBinding.ensureInitialized();
-      _prefs = await SharedPreferences.getInstance();
+      _prefs = SharedPreferencesAsync();
+
+      await _maybeMigrateAccessToken();
+    }
+  }
+
+  Future<void> _maybeMigrateAccessToken() async {
+    final legacyPrefs = await SharedPreferences.getInstance();
+
+    if (legacyPrefs.containsKey(persistSessionKey)) {
+      final accessToken = legacyPrefs.getString(persistSessionKey);
+
+      if (accessToken != null) {
+        await legacyPrefs.remove(persistSessionKey);
+        await _prefs.setString(persistSessionKey, accessToken);
+      }
     }
   }
 

packages/supabase_flutter/pubspec.yaml

@@ -6,8 +6,8 @@ repository: 'https://github.com/supabase/supabase-flutter/tree/main/packages/sup
 documentation: 'https://supabase.com/docs/reference/dart/introduction'
 
 environment:
-  sdk: '>=3.3.0 <4.0.0'
-  flutter: '>=3.19.0'
+  sdk: '>=3.4.0 <4.0.0'
+  flutter: '>=3.22.0'
 
 dependencies:
   app_links: '>=3.5.0 <7.0.0'
@@ -20,7 +20,7 @@ dependencies:
   supabase: 2.7.0
   url_launcher: ^6.1.2
   path_provider: ^2.0.0
-  shared_preferences: ^2.0.0
+  shared_preferences: ^2.3.0
   logging: ^1.2.0
   web: '>=0.5.0 <2.0.0'