CWA-164 | added biometric authentication

android/app/src/main/AndroidManifest.xml

@@ -7,6 +7,7 @@
          FlutterApplication and put your custom class here. -->
 
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.USE_FINGERPRINT"/>
     
     <application
         android:name="io.flutter.app.FlutterApplication"

android/app/src/main/java/com/cakewallet/cake_wallet/MainActivity.java

@@ -1,10 +1,10 @@
 package com.cakewallet.cake_wallet;
 
 import android.os.Bundle;
-import io.flutter.app.FlutterActivity;
+import io.flutter.app.FlutterFragmentActivity;
 import io.flutter.plugins.GeneratedPluginRegistrant;
 
-public class MainActivity extends FlutterActivity {
+public class MainActivity extends FlutterFragmentActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

lib/generated/i18n.dart

@@ -38,6 +38,7 @@ class S implements WidgetsLocalizations {
   String get authenticated => "Authenticated";
   String get authentication => "Authentication";
   String get available_balance => "Available Balance";
+  String get biometric_auth_reason => "Scan your fingerprint to authenticate";
   String get cancel => "Cancel";
   String get change => "Change";
   String get change_currency => "Change Currency";
@@ -315,6 +316,8 @@ class $de extends S {
   @override
   String get hidden_balance => "Verstecktes Gleichgewicht";
   @override
+  String get biometric_auth_reason => "Scannen Sie Ihren Fingerabdruck zur Authentifizierung";
+  @override
   String get transaction_sent => "Transaktion gesendet!";
   @override
   String get password => "Passwort";
@@ -861,6 +864,8 @@ class $hi extends S {
   @override
   String get hidden_balance => "छिपा हुआ संतुलन";
   @override
+  String get biometric_auth_reason => "प्रमाणित करने के लिए अपने फ़िंगरप्रिंट को स्कैन करें";
+  @override
   String get transaction_sent => "भेजा गया लेन-देन";
   @override
   String get password => "पारण शब्द";
@@ -1407,6 +1412,8 @@ class $ru extends S {
   @override
   String get hidden_balance => "Скрытый баланс";
   @override
+  String get biometric_auth_reason => "Отсканируйте свой отпечаток пальца для аутентификации";
+  @override
   String get transaction_sent => "Tранзакция отправлена!";
   @override
   String get password => "Password";
@@ -1953,6 +1960,8 @@ class $ko extends S {
   @override
   String get hidden_balance => "숨겨진 균형";
   @override
+  String get biometric_auth_reason => "지문을 스캔하여 인증";
+  @override
   String get transaction_sent => "거래가 전송되었습니다!";
   @override
   String get password => "암호";
@@ -2499,6 +2508,8 @@ class $pt extends S {
   @override
   String get hidden_balance => "Saldo escondido";
   @override
+  String get biometric_auth_reason => "Digitalize sua impressão digital para autenticar";
+  @override
   String get transaction_sent => "Transação enviada!";
   @override
   String get password => "Senha";
@@ -3045,6 +3056,8 @@ class $ja extends S {
   @override
   String get hidden_balance => "隠れたバランス";
   @override
+  String get biometric_auth_reason => "प指紋をスキャンして認証する";
+  @override
   String get transaction_sent => "トランザクションが送信されました！";
   @override
   String get password => "パスワード";
@@ -3595,6 +3608,8 @@ class $pl extends S {
   @override
   String get hidden_balance => "Ukryta równowaga";
   @override
+  String get biometric_auth_reason => "Zeskanuj swój odcisk palca, aby go uwierzytelnić";
+  @override
   String get transaction_sent => "Transakcja wysłana!";
   @override
   String get password => "Hasło";
@@ -4141,6 +4156,8 @@ class $es extends S {
   @override
   String get hidden_balance => "Balance oculto";
   @override
+  String get biometric_auth_reason => "Escanee su huella digital para autenticar";
+  @override
   String get transaction_sent => "Transacción enviada!";
   @override
   String get password => "Contraseña";
@@ -4687,6 +4704,8 @@ class $nl extends S {
   @override
   String get hidden_balance => "Verborgen balans";
   @override
+  String get biometric_auth_reason => "Scan uw vingerafdruk om te verifiëren";
+  @override
   String get transaction_sent => "Transactie verzonden!";
   @override
   String get password => "Wachtwoord";
@@ -5233,6 +5252,8 @@ class $zh extends S {
   @override
   String get hidden_balance => "隐藏余额";
   @override
+  String get biometric_auth_reason => "掃描指紋以進行身份驗證";
+  @override
   String get transaction_sent => "交易已发送";
   @override
   String get password => "密码";

lib/src/domain/common/biometric_auth.dart

@@ -0,0 +1,24 @@
+import 'package:local_auth/local_auth.dart';
+import 'package:flutter/services.dart';
+import 'package:cake_wallet/generated/i18n.dart';
+
+class BiometricAuth {
+
+  Future<bool> isAuthenticated() async {
+    final LocalAuthentication _localAuth = LocalAuthentication();
+
+    try {
+      return await _localAuth.authenticateWithBiometrics(
+          localizedReason: S.current.biometric_auth_reason,
+          useErrorDialogs: true,
+          stickyAuth: false
+      );
+    } on PlatformException
+    catch(e) {
+      print(e);
+    }
+
+    return false;
+  }
+
+}

lib/src/screens/auth/auth_page.dart

@@ -6,6 +6,8 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/stores/auth/auth_state.dart';
 import 'package:cake_wallet/src/stores/auth/auth_store.dart';
 import 'package:cake_wallet/src/screens/pin_code/pin_code.dart';
+import 'package:cake_wallet/src/stores/settings/settings_store.dart';
+import 'package:cake_wallet/src/domain/common/biometric_auth.dart';
 
 typedef OnAuthenticationFinished = void Function(bool, AuthPageState);
 
@@ -33,6 +35,26 @@ class AuthPageState extends State<AuthPage> {
   @override
   Widget build(BuildContext context) {
     final authStore = Provider.of<AuthStore>(context);
+    final settingsStore = Provider.of<SettingsStore>(context);
+
+    if (settingsStore.allowBiometricalAuthentication) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        final biometricAuth = BiometricAuth();
+        biometricAuth.isAuthenticated().then(
+                (isAuth) {
+              if (isAuth) {
+                authStore.biometricAuth();
+                _key.currentState.showSnackBar(
+                  SnackBar(
+                    content: Text(S.of(context).authenticated),
+                    backgroundColor: Colors.green,
+                  ),
+                );
+              }
+            }
+        );
+      });
+    }
 
     reaction((_) => authStore.state, (AuthState state) {
       if (state is AuthenticatedSuccessfully) {

lib/src/stores/auth/auth_store.dart

@@ -91,4 +91,9 @@ abstract class AuthStoreBase with Store {
 
     return Duration(milliseconds: timeout);
   }
+
+  @action
+  void biometricAuth() {
+    state = AuthenticatedSuccessfully();
+  }
 }

pubspec.lock

@@ -406,6 +406,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.3.19"
+  local_auth:
+    dependency: "direct main"
+    description:
+      name: local_auth
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.1"
   logging:
     dependency: transitive
     description:

pubspec.yaml

@@ -45,6 +45,7 @@ dependencies:
     path: ./cw_monero
   hive: ^1.2.0
   hive_flutter: ^0.2.1
+  local_auth: ^0.6.1
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.

res/values/strings_de.arb

@@ -336,5 +336,7 @@
   "paste" : "Einfügen",
   "restore_from_seed_placeholder" : "Bitte geben Sie hier Ihren Code ein",
   "add_new_word" : "Neues Wort hinzufügen",
-  "incorrect_seed" : "Der eingegebene Text ist ungültig."
+  "incorrect_seed" : "Der eingegebene Text ist ungültig.",
+
+  "biometric_auth_reason" : "Scannen Sie Ihren Fingerabdruck zur Authentifizierung"
 }

res/values/strings_en.arb

@@ -336,5 +336,7 @@
   "paste" : "Paste",
   "restore_from_seed_placeholder" : "Please enter or paste your seed here",
   "add_new_word" : "Add new word",
-  "incorrect_seed" : "The text entered is not valid."
+  "incorrect_seed" : "The text entered is not valid.",
+
+  "biometric_auth_reason" : "Scan your fingerprint to authenticate"
 }

res/values/strings_es.arb

@@ -336,5 +336,7 @@
   "paste" : "Pegar",
   "restore_from_seed_placeholder" : "Ingrese o pegue su frase de código aquí",
   "add_new_word" : "Agregar palabra nueva",
-  "incorrect_seed" : "El texto ingresado no es válido."
+  "incorrect_seed" : "El texto ingresado no es válido.",
+
+  "biometric_auth_reason" : "Escanee su huella digital para autenticar"
 }

res/values/strings_hi.arb

@@ -336,5 +336,7 @@
   "paste" : "पेस्ट करें",
   "restore_from_seed_placeholder" : "कृपया अपना कोड वाक्यांश यहां दर्ज करें या पेस्ट करें",
   "add_new_word" : "नया शब्द जोड़ें",
-  "incorrect_seed" : "दर्ज किया गया पाठ मान्य नहीं है।"
+  "incorrect_seed" : "दर्ज किया गया पाठ मान्य नहीं है।",
+
+  "biometric_auth_reason" : "प्रमाणित करने के लिए अपने फ़िंगरप्रिंट को स्कैन करें"
 }

res/values/strings_ja.arb

@@ -336,5 +336,7 @@
   "paste" : "ペースト",
   "restore_from_seed_placeholder" : "ここにコードフレーズを入力または貼り付けてください",
   "add_new_word" : "新しい単語を追加",
-  "incorrect_seed" : "入力されたテキストは無効です。"
+  "incorrect_seed" : "入力されたテキストは無効です。",
+
+  "biometric_auth_reason" : "प指紋をスキャンして認証する"
 }

res/values/strings_ko.arb

@@ -336,5 +336,7 @@
   "paste" : "풀",
   "restore_from_seed_placeholder" : "여기에 코드 문구를 입력하거나 붙여 넣으십시오.",
   "add_new_word" : "새로운 단어 추가",
-  "incorrect_seed" : "입력하신 텍스트가 유효하지 않습니다."
+  "incorrect_seed" : "입력하신 텍스트가 유효하지 않습니다.",
+
+  "biometric_auth_reason" : "지문을 스캔하여 인증"
 }

res/values/strings_nl.arb

@@ -336,5 +336,7 @@
   "paste" : "Plakken",
   "restore_from_seed_placeholder" : "Voer hier uw codefrase in of plak deze",
   "add_new_word" : "Nieuw woord toevoegen",
-  "incorrect_seed" : "De ingevoerde tekst is niet geldig."
+  "incorrect_seed" : "De ingevoerde tekst is niet geldig.",
+
+  "biometric_auth_reason" : "Scan uw vingerafdruk om te verifiëren"
 }

res/values/strings_pl.arb

@@ -336,5 +336,7 @@
   "paste" : "Pasta",
   "restore_from_seed_placeholder" : "Wpisz lub wklej tutaj swoją frazę kodową",
   "add_new_word" : "Dodaj nowe słowo",
-  "incorrect_seed" : "Wprowadzony tekst jest nieprawidłowy."
+  "incorrect_seed" : "Wprowadzony tekst jest nieprawidłowy.",
+
+  "biometric_auth_reason" : "Zeskanuj swój odcisk palca, aby go uwierzytelnić"
 }

res/values/strings_pt.arb

@@ -336,5 +336,7 @@
   "paste" : "Colar",
   "restore_from_seed_placeholder" : "Digite ou cole sua frase de código aqui",
   "add_new_word" : "Adicionar nova palavra",
-  "incorrect_seed" : "O texto digitado não é válido."
+  "incorrect_seed" : "O texto digitado não é válido.",
+
+  "biometric_auth_reason" : "Digitalize sua impressão digital para autenticar"
 }

res/values/strings_ru.arb

@@ -336,5 +336,7 @@
   "paste" : "Вставить",
   "restore_from_seed_placeholder" : "Введите или вставте код фразу вашего кошелька",
   "add_new_word" : "Добавить новое слово",
-  "incorrect_seed" : "Введенный текст некорректный."
+  "incorrect_seed" : "Введенный текст некорректный.",
+
+  "biometric_auth_reason" : "Отсканируйте свой отпечаток пальца для аутентификации"
 }

res/values/strings_zh.arb

@@ -336,5 +336,7 @@
   "paste" : "糊",
   "restore_from_seed_placeholder" : "请在此处输入或粘贴您的代码短语",
   "add_new_word" : "添加新词",
-  "incorrect_seed" : "输入的文字无效。"
+  "incorrect_seed" : "输入的文字无效。",
+
+  "biometric_auth_reason" : "掃描指紋以進行身份驗證"
 }