### Example pubspec.yaml Entry for smart_auth

Source: https://pub.dev/packages/smart_auth/install

This is an example of how the smart_auth dependency will appear in your pubspec.yaml file after running the add command. It ensures the package is correctly listed for your project.

```yaml
dependencies:
  smart_auth: ^3.2.0
```

--------------------------------

### Smart Auth Flutter Plugin Example App

Source: https://pub.dev/packages/smart_auth/example

This is the main example app demonstrating various functionalities of the Smart Auth plugin. It includes methods to get the app signature, request SMS codes via user consent or retriever API, and request phone number hints. Ensure you handle the lifecycle of listeners by removing them when no longer needed.

```dart
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:smart_auth/smart_auth.dart';

void main() {
  runApp(const MyApp());
}

/// This example demonstrates how to use the SmartAuth plugin.
class MyApp extends StatefulWidget {
  /// Creates a new instance of the [MyApp] class.
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final smartAuth = SmartAuth.instance;
  final pinputController = TextEditingController();
  String? appSignature;

  @override
  void dispose() {
    /// Removes the listeners if the SMS code is not received yet
    smartAuth.removeSmsRetrieverApiListener();

    /// Removes the listeners if the SMS code is not received yet
    smartAuth.removeUserConsentApiListener();

    pinputController.dispose();
    super.dispose();
  }

  Future<void> getAppSignature() async {
    final res = await smartAuth.getAppSignature();
    setState(() => appSignature = res.data);
    debugPrint('Signature: $res');
  }

  Future<void> userConsent() async {
    final res = await smartAuth.getSmsWithUserConsentApi();
    if (res.hasData) {
      debugPrint('userConsent: $res');
      final code = res.requireData.code;

      /// The code can be null if the SMS was received but
      /// the code was not extracted from it
      if (code == null) return;
      pinputController.text = code;
      pinputController.selection = TextSelection.fromPosition(
        TextPosition(offset: pinputController.text.length),
      );
    } else if (res.isCanceled) {
      debugPrint('userConsent canceled');
    } else {
      debugPrint('userConsent failed: $res');
    }
  }

  Future<void> smsRetriever() async {
    final res = await smartAuth.getSmsWithRetrieverApi();
    if (res.hasData) {
      debugPrint('smsRetriever: $res');
      final code = res.requireData.code;

      /// The code can be null if the SMS was received but
      /// the code was not extracted from it
      if (code == null) return;
      pinputController.text = code;
      pinputController.selection = TextSelection.fromPosition(
        TextPosition(offset: pinputController.text.length),
      );
    } else {
      debugPrint('smsRetriever failed: $res');
    }
  }

  Future<void> requestPhoneNumberHint() async {
    final res = await smartAuth.requestPhoneNumberHint();
    if (res.hasData) {
      // Use the phone number
    } else {
      // Handle error
    }
    debugPrint('requestHint: $res');
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      locale: const Locale('es', ''),
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      supportedLocales: const [
        Locale('en', ''),
        Locale('es', ''),
      ],
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: SingleChildScrollView(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              mainAxisAlignment: MainAxisAlignment.center,
              mainAxisSize: MainAxisSize.min,
              children: [
                Padding(
                  padding: const EdgeInsets.all(8),
                  child: TextField(
                    controller: pinputController,
                    decoration: const InputDecoration(
                      hintText: 'Code',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                TextButton(
                  onPressed: userConsent,
                  child: const Text('Sms User Consent API'),
                ),
                TextButton(
                  onPressed: smsRetriever,
                  child: const Text('Sms Retriever API'),
                ),
                TextButton(
                  onPressed: getAppSignature,
                  child: const Text('Get App Signature'),
                ),
                if (appSignature != null)
                  SelectableText(
                    'App Signature: $appSignature',
                    textAlign: TextAlign.center,
                  ),
                TextButton(
                  onPressed: requestPhoneNumberHint,
                  child: const Text('Request Phone Number Hint'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

```

--------------------------------

### Get SMS with User Consent

Source: https://pub.dev/packages/smart_auth

Implement SMS verification by prompting the user to grant access to a single SMS message. The extracted code is then sent to your server for verification.

```dart
void getSmsWithUserConsentApi() async {
  final res = await smartAuth.getSmsWithUserConsentApi();
  if (res.hasData) {
    final code = res.requireData.code;

    /// The code can be null if the SMS was received but the code was not extracted from it
    if (code == null) return;
    //  Use the code
  } else if (res.isCanceled) {
    // User canceled the dialog
  } else {
    // handle the error
  }
}
```

--------------------------------

### Get SMS with SMS Retriever API

Source: https://pub.dev/packages/smart_auth

Perform automatic SMS-based user verification without user interaction or extra permissions. The API listens for an SMS from your server and extracts the verification code.

```dart
void getSmsWithRetrieverApi() async {
  final res = await smartAuth.getSmsWithRetrieverApi();
  if (res.hasData) {
    final code = res.requireData.code;

    /// The code can be null if the SMS was received but the code was not extracted from it
    if (code == null) return;
    //  Use the code
  } else {
    // handle the error
  }
}
```

--------------------------------

### Create SmartAuth Instance

Source: https://pub.dev/packages/smart_auth

Instantiate the SmartAuth class to access its methods. This is the first step before using any of the package's features.

```dart
final smartAuth = SmartAuth.instance;
```

--------------------------------

### Set Kotlin and Gradle Plugin Versions (Legacy)

Source: https://pub.dev/packages/smart_auth

Configure Kotlin and Gradle plugin versions in the `android/build.gradle` file for legacy imperative apply.

```gradle
buildscript {
    ext.kotlin_version = '1.8.0'
    ...others

    dependencies {
        classpath 'com.android.tools.build:gradle:8.3.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}
```

--------------------------------

### Set Kotlin and Gradle Plugin Versions (Declarative)

Source: https://pub.dev/packages/smart_auth

Configure Kotlin and Android application plugin versions in the `android/settings.gradle` file for the new declarative plugin approach.

```gradle
plugins {
    id "org.jetbrains.kotlin.android" version "1.8.0" apply false
    id "com.android.application" version "8.3.2" apply false
    ...others
}
```

--------------------------------

### Set Java Version

Source: https://pub.dev/packages/smart_auth

Configure the Java version to 11 for both source and target compatibility in `android/app/build.gradle`.

```gradle
compileOptions {
    sourceCompatibility = JavaVersion.VERSION_11
    targetCompatibility = JavaVersion.VERSION_11
}

kotlinOptions {
    jvmTarget = '11'
}
```

--------------------------------

### Add smart_auth Dependency to Flutter Project

Source: https://pub.dev/packages/smart_auth/install

Run this command in your terminal to add the smart_auth package to your Flutter project's dependencies. This command automatically updates your pubspec.yaml file.

```bash
$ flutter pub add smart_auth
```

--------------------------------

### Import smart_auth Package in Dart Code

Source: https://pub.dev/packages/smart_auth/install

Use this import statement in your Dart files to access the functionalities provided by the smart_auth package. This makes the package's classes and methods available for use.

```dart
import 'package:smart_auth/smart_auth.dart';
```

--------------------------------

### Set Gradle Version

Source: https://pub.dev/packages/smart_auth

Update the Gradle version to 8.4.0 or above by modifying the `distributionUrl` in `android/gradle/wrapper/gradle-wrapper.properties`.

```properties
distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip
```

--------------------------------

### Request Phone Number Hint

Source: https://pub.dev/packages/smart_auth

Use the Phone Number Hint API to provide a user's SIM-based phone number as a hint. This API requires no additional permissions and simplifies user input.

```dart
void requestPhoneNumberHint() async {
  final res = await smartAuth.requestPhoneNumberHint();
  if (res.hasData) {
    // Use the phone number
  } else {
    // Handle error
  }
}
```

--------------------------------

### Remove SMS Listeners

Source: https://pub.dev/packages/smart_auth

Manually remove listeners for SMS retrieval APIs if they are not automatically removed after receiving the code. Use `removeUserConsentApiListener` or `removeSmsRetrieverApiListener`.

```dart
void removeSmsListener() {
  smartAuth.removeUserConsentApiListener();
  // or
  smartAuth.removeSmsRetrieverApiListener();
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.