koolbase_flutter 1.9.0

Flutter SDK for Koolbase — feature flags, remote config, version enforcement, authentication, file storage, database, realtime subscriptions, and OTA updates for mobile apps.

koolbase_flutter

Flutter SDK for Koolbase — a Flutter-first Backend as a Service with authentication, database, storage, realtime, functions, feature flags, remote config, version enforcement, and OTA updates.

Installation

dependencies:
  koolbase_flutter: ^1.6.0

Setup

Initialize the SDK before runApp():

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await Koolbase.initialize(const KoolbaseConfig(
    publicKey: 'pk_live_xxxx',  // From your Koolbase dashboard
    baseUrl: 'https://api.koolbase.com',
  ));

  runApp(MyApp());
}

---

Authentication

// Register
await Koolbase.auth.register(email: '[e-mail]', password: 'password');

// Login
await Koolbase.auth.login(email: '[e-mail]', password: 'password');

// Current user
final user = Koolbase.auth.currentUser;

// Logout
await Koolbase.auth.logout();

// Google OAuth
await Koolbase.auth.signInWithGoogle(idToken: googleIdToken);

// Password reset
await Koolbase.auth.forgotPassword(email: '[e-mail]');

---

Database

// Insert a record
await Koolbase.db.collection('posts').insert({
  'title': 'Hello world',
  'body': 'My first post',
});

// Query records
final records = await Koolbase.db.collection('posts').get();

// Filter
final filtered = await Koolbase.db
    .collection('posts')
    .where('status', 'published')
    .get();

// Update
await Koolbase.db.collection('posts').doc('record-id').update({'title': 'Updated'});

// Delete
await Koolbase.db.collection('posts').doc('record-id').delete();

---

Storage

// Upload a file
final file = File('/path/to/image.jpg');
await Koolbase.storage.upload(
  bucket: 'avatars',
  path: 'user-123.jpg',
  file: file,
  onProgress: (p) => print('${p.percentage}%'),
);

// Get download URL
final url = await Koolbase.storage.getDownloadUrl(
  bucket: 'avatars',
  path: 'user-123.jpg',
);

// Delete
await Koolbase.storage.delete(bucket: 'avatars', path: 'user-123.jpg');

---

Realtime

final subscription = Koolbase.realtime.on(
  collection: 'messages',
  onCreated: (record) => print('New message: ${record.data}'),
  onUpdated: (record) => print('Updated: ${record.data}'),
  onDeleted: (record) => print('Deleted: ${record.id}'),
);

// Cancel when done
subscription.cancel();

---

Functions

// Invoke a deployed function
final result = await Koolbase.functions.invoke(
  'send-welcome-email',
  body: {'userId': '123', 'email': '[e-mail]'},
);

if (result.success) {
  print(result.data);
}

---

OTA Updates

// Auto-check and download on launch
final result = await Koolbase.ota.initialize(
  channel: 'production',
  onProgress: (p) => print('${p.state}'),
);

// Read a JSON file from the active bundle
final config = await Koolbase.ota.readJson('config.json');

// Get path to a bundled asset
final bannerPath = await Koolbase.ota.getFilePath('banner.png');

// Manual check
final check = await Koolbase.ota.check(channel: 'production');
if (check.hasUpdate) {
  await Koolbase.ota.download(check);
}

---

Feature Flags

if (Koolbase.isEnabled('new_checkout')) {
  // show new checkout
}

---

Remote Config

final timeout = Koolbase.configInt('swap_timeout_seconds', fallback: 30);
final url = Koolbase.configString('api_base_url', fallback: 'https://api.example.com');
final debugMode = Koolbase.configBool('debug_mode', fallback: false);

---

Version Enforcement

final result = Koolbase.checkVersion();

switch (result.status) {
  case VersionStatus.forceUpdate:
    // Block the app — show update screen
    break;
  case VersionStatus.softUpdate:
    // Show a banner
    break;
  case VersionStatus.upToDate:
    // All good
    break;
}

---

How It Works

1. On first launch, the SDK generates a stable anonymous device UUID stored in secure storage
2. On init, the cached payload loads instantly — no network wait
3. A fresh bootstrap payload is fetched in the background
4. Flag evaluation happens locally using stableHash(deviceId + ":" + flagKey) % 100
5. The payload refreshes on a configurable interval (default 60s)
6. If the network is unavailable, the last cached payload is used

Rollout Bucketing

Rollout decisions are made locally by the SDK, not the server. This means:

• The bootstrap response is identical for all devices (CDN cacheable)
• The same device always gets the same flag result (stable)
• Evaluation works offline

// This is what happens internally
final bucket = stableHash('$deviceId:$flagKey') % 100;
final enabled = bucket < flag.rolloutPercentage;

---

Documentation

Full documentation at docs.koolbase.com

Dashboard

Manage your projects, environments, and features at app.koolbase.com

License

MIT