App Check Works Alongside Other Firebase Services to Help Protect Your Backend Resources

Firebase App Check for Flutter 

A Flutter plugin to use the Firebase App Check API.

To learn more about Firebase App Check, please visit the Firebase website

Getting Started 

To get started with Firebase App Check for Flutter, please see the documentation.

Usage 

To use this plugin, please visit the App Check Usage documentation

Issues and feedback 

Please file FlutterFire specific issues, bugs, or feature requests in our issue tracker.

Plugin issues that are not specific to FlutterFire can be filed in the Flutter issue tracker.

To contribute a change to this plugin, please review our contribution guide and open a pull request.

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add firebase_app_check

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

dependencies:
  firebase_app_check: ^0.1.5+2

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:firebase_app_check/firebase_app_check.dart';

example/lib/main.dart

// Copyright 2022, the Chromium project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:firebase_app_check/firebase_app_check.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

import 'firebase_options.dart';

const kWebRecaptchaSiteKey = '6Lemcn0dAAAAABLkf6aiiHvpGD6x-zF3nOSDU2M8';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  // Activate app check after initialization, but before
  // usage of any Firebase services.
  await FirebaseAppCheck.instance
      // Your personal reCaptcha public key goes here:
      .activate(
    androidProvider: AndroidProvider.debug,
    appleProvider: AppleProvider.debug,
    webRecaptchaSiteKey: kWebRecaptchaSiteKey,
  );

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  final String title = 'Firebase App Check';

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Firebase App Check',
      home: FirebaseAppCheckExample(title: title),
    );
  }
}

class FirebaseAppCheckExample extends StatefulWidget {
  FirebaseAppCheckExample({
    Key? key,
    required this.title,
  }) : super(key: key);

  final String title;

  @override
  _FirebaseAppCheck createState() => _FirebaseAppCheck();
}

class _FirebaseAppCheck extends State<FirebaseAppCheckExample> {
  final appCheck = FirebaseAppCheck.instance;
  String _message = '';
  String _eventToken = 'not yet';

  @override
  void initState() {
    appCheck.onTokenChange.listen(setEventToken);
    super.initState();
  }

  void setMessage(String message) {
    setState(() {
      _message = message;
    });
  }

  void setEventToken(String? token) {
    setState(() {
      _eventToken = token ?? 'not yet';
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          children: [
            ElevatedButton(
              onPressed: () async {
                // Use this button to check whether the request was validated on the Firebase console
                // Gets first document in collection
                final result = await FirebaseFirestore.instance
                    .collection('flutter-tests')
                    .limit(1)
                    .get();

                if (result.docs.isNotEmpty) {
                  setMessage('Document found');
                } else {
                  setMessage(
                    'Document not found, please add a document to the collection',
                  );
                }
              },
              child: const Text('Test App Check validates requests'),
            ),
            ElevatedButton(
              onPressed: () async {
                if (kIsWeb) {
                  print(
                    'Pass in your "webRecaptchaSiteKey" key found on you Firebase Console to activate if using on the web platform.',
                  );
                }
                await appCheck.activate(
                  webRecaptchaSiteKey: kWebRecaptchaSiteKey,
                );
                setMessage('activated!!');
              },
              child: const Text('activate()'),
            ),
            ElevatedButton(
              onPressed: () async {
                // Token will be passed to `onTokenChange()` event handler
                await appCheck.getToken(true);
              },
              child: const Text('getToken()'),
            ),
            ElevatedButton(
              onPressed: () async {
                await appCheck.setTokenAutoRefreshEnabled(true);
                setMessage('successfully set auto token refresh!!');
              },
              child: const Text('setTokenAutoRefreshEnabled()'),
            ),
            const SizedBox(height: 20),
            Text(
              _message, //#007bff
              style: const TextStyle(
                color: Color.fromRGBO(47, 79, 79, 1),
                fontSize: 16,
              ),
            ),
            const SizedBox(height: 20),
            Text(
              'Token received from tokenChanges() API: $_eventToken', //#007bff
              style: const TextStyle(
                color: Color.fromRGBO(128, 0, 128, 1),
                fontSize: 16,
              ),
            ),
          ],
        ),
      ),
    );
  }
}

Download details:

Author: firebase.google.com

Source: https://github.com/firebase/flutterfire/tree/master/packages/firebase_app_check/firebase_app_check

#flutter #android #ios