### Install Expo Wallet Module

Source: https://github.com/giulio987/expo-wallet/blob/master/README.md

Instructions for installing the @giulio987/expo-wallet module using npm or yarn. This is the initial step required before using the module's functionalities.

```bash
npm install @giulio987/expo-wallet
```

```bash
yarn add @giulio987/expo-wallet
```

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

### React Native Wallet Integration with Expo Wallet

Source: https://context7.com/giulio987/expo-wallet/llms.txt

This snippet shows a complete example of integrating Expo Wallet into a React Native application. It includes checking wallet availability, fetching pass data (PKPASS for iOS, JWT for Android) from a mock API, and adding the pass to the wallet. It also handles various error codes specific to the wallet integration process and displays platform-specific messages.

```javascript
import React, { useState, useEffect } from 'react';
import {
  View,
  Text,
  Button,
  Alert,
  Platform,
  ActivityIndicator,
  StyleSheet
} from 'react-native';
import ExpoWallet from '@giulio987/expo-wallet';

const TicketScreen = ({ ticketId }) => {
  const [walletAvailable, setWalletAvailable] = useState(false);
  const [loading, setLoading] = useState(true);
  const [addingPass, setAddingPass] = useState(false);

  useEffect(() => {
    checkWallet();
  }, []);

  const checkWallet = async () => {
    try {
      const available = await ExpoWallet.isAvailable();
      setWalletAvailable(available);
    } catch (error) {
      console.error('Wallet check failed:', error);
      setWalletAvailable(false);
    } finally {
      setLoading(false);
    }
  };

  const fetchPassData = async (ticketId) => {
    // Fetch pass data from your backend
    const response = await fetch(`https://api.example.com/tickets/${ticketId}/pass`, {
      headers: {
        'Platform': Platform.OS,
        'Authorization': 'Bearer YOUR_TOKEN'
      }
    });

    const data = await response.json();

    // Backend should return base64 .pkpass for iOS or JWT token for Android
    return Platform.OS === 'ios' ? data.pkpass : data.token;
  };

  const handleAddToWallet = async () => {
    if (!walletAvailable) {
      Alert.alert('Not Available', 'Wallet is not available on this device');
      return;
    }

    setAddingPass(true);

    try {
      // Fetch platform-specific pass data
      const passData = await fetchPassData(ticketId);

      // Add pass to wallet
      const result = await ExpoWallet.addPass(passData);

      if (result === true) {
        Alert.alert(
          'Success',
          'Your ticket has been added to your wallet!',
          [{ text: 'OK' }]
        );
      }
    } catch (error) {
      let errorMessage = 'Failed to add ticket to wallet';

      switch (error.code) {
        case 'E_PASS_LIBRARY_CANNOT_ADD':
          errorMessage = 'This ticket cannot be added. It may already be in your wallet.';
          break;
        case 'E_PASS_LIBRARY_INVALID_DATA':
          errorMessage = 'Invalid ticket data. Please contact support.';
          break;
        case 'E_PASS_LIBRARY_UNAVAILABLE':
          errorMessage = 'Wallet is not available on this device.';
          break;
        case 'GOOGLE_WALLET_API_NOT_AVAILABLE':
          errorMessage = 'Google Wallet is not available. Please install it from Play Store.';
          break;
      }

      Alert.alert('Error', errorMessage);
      console.error('Add to wallet error:', error);
    } finally {
      setAddingPass(false);
    }
  };

  if (loading) {
    return (
      <View style={styles.center}>
        <ActivityIndicator size="large" />
        <Text>Checking wallet availability...</Text>
      </View>
    );
  }

  return (
    <View style={styles.container}>
      <Text style={styles.title}>Your Ticket</Text>
      <Text style={styles.ticketId}>ID: {ticketId}</Text>

      {walletAvailable ? (
        <Button
          title={addingPass ? 'Adding to Wallet...' : 'Add to Wallet'}
          onPress={handleAddToWallet}
          disabled={addingPass}
        />
      ) : (
        <Text style={styles.unavailable}>
          Wallet is not available on this device
        </Text>
      )}
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 20,
    backgroundColor: '#fff'
  },
  center: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center'
  },
  title: {
    fontSize: 24,
    fontWeight: 'bold',
    marginBottom: 10
  },
  ticketId: {
    fontSize: 16,
    color: '#666',
    marginBottom: 20
  },
  unavailable: {
    color: '#999',
    fontStyle: 'italic'
  }
});

export default TicketScreen;

```

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

### Check Wallet Availability using Expo Wallet (JavaScript)

Source: https://context7.com/giulio987/expo-wallet/llms.txt

Checks if the native wallet functionality is available on the current device. This function returns a promise that resolves to a boolean indicating availability. It's recommended to call this before attempting to add passes to provide users with relevant feedback and disable the add pass functionality if the wallet is unavailable.

```javascript
import ExpoWallet from '@giulio987/expo-wallet';
import { Button, View, Text, StyleSheet } from 'react-native';
import { useEffect, useState } from 'react';

const WalletComponent = () => {
  const [walletAvailable, setWalletAvailable] = useState(false);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    checkWalletAvailability();
  }, []);

  const checkWalletAvailability = async () => {
    try {
      const available = await ExpoWallet.isAvailable();
      setWalletAvailable(available);
      console.log('Wallet available:', available);
    } catch (error) {
      console.error('Error checking wallet availability:', error);
      setWalletAvailable(false);
    } finally {
      setLoading(false);
    }
  };

  if (loading) {
    return <Text>Checking wallet availability...</Text>;
  }

  return (
    <View style={styles.container}>
      {walletAvailable ? (
        <>
          <Text style={styles.status}>✓ Wallet is available</Text>
          <Button
            title="Add Pass to Wallet"
            onPress={addPassToWallet} // Assuming addPassToWallet is defined elsewhere
          />
        </>
      ) : (
        <Text style={styles.status}>✗ Wallet is not available on this device</Text>
      )}
    </View>
  );
};

const styles = StyleSheet.create({
  container: { padding: 20 },
  status: { fontSize: 16, marginBottom: 10 }
});

```

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

### Check Wallet Availability (React Native)

Source: https://github.com/giulio987/expo-wallet/blob/master/README.md

This JavaScript function checks if the Wallet application is available on the device. It displays an alert indicating whether the Wallet is available or not.

```javascript
const isAvailable = async () => {
  const res = await ExpoWallet.isAvailable();
  if (res) {
    alert("Available");
  } else {
    alert("Not available");
  }
};
```

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

### Handle Expo Wallet Errors with WALLET_ERRORS Enum (JavaScript)

Source: https://context7.com/giulio987/expo-wallet/llms.txt

This snippet demonstrates how to handle errors when adding passes using the Expo Wallet module. It utilizes the WALLET_ERRORS Enum to identify specific failure reasons and provides user-friendly messages. The function takes pass data as input and returns a success status along with an error message if applicable. Dependencies include the '@giulio987/expo-wallet' package.

```javascript
import ExpoWallet, { WALLET_ERRORS } from '@giulio987/expo-wallet';

const addPassWithDetailedErrorHandling = async (passData) => {
  try {
    const result = await ExpoWallet.addPass(passData);
    return { success: true, result };
  } catch (error) {
    // Map error codes to user-friendly messages
    const errorMessages = {
      [WALLET_ERRORS.E_PASS_LIBRARY_CANNOT_ADD]:
        'This pass cannot be added to your wallet. It may already exist or be incompatible.',
      [WALLET_ERRORS.E_PASS_LIBRARY_INVALID_DATA]:
        'The pass data is invalid or corrupted. Please try again.',
      [WALLET_ERRORS.E_PASS_LIBRARY_GENERIC]:
        'An unexpected error occurred while adding the pass.',
      [WALLET_ERRORS.E_PASS_LIBRARY_UNAVAILABLE]:
        'Wallet services are not available on this device.',
    };

    const message = errorMessages[error.code] || 'Failed to add pass to wallet';

    console.error('Wallet Error:', {
      code: error.code,
      message: error.message,
      userMessage: message
    });

    return {
      success: false,
      error: error.code,
      message
    };
  }
};

// Usage example
const handleAddPass = async () => {
  const passData = Platform.OS === 'ios' ? iosPass : androidToken;
  const { success, message } = await addPassWithDetailedErrorHandling(passData);

  if (success) {
    showSuccessNotification('Pass added successfully');
  } else {
    showErrorNotification(message);
  }
};
```

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

### Add Pass to Wallet using Expo Wallet (JavaScript)

Source: https://context7.com/giulio987/expo-wallet/llms.txt

Adds a pass or card to the device's native wallet. It accepts a base64-encoded .pkpass file for iOS or a JWT token for Google Wallet on Android. The function returns a promise that resolves on success or rejects with an error code, handling platform differences and potential errors like invalid data or unavailability.

```javascript
import ExpoWallet from '@giulio987/expo-wallet';
import { Platform, Alert } from 'react-native';

// Example with platform-specific pass data
const addPassToWallet = async () => {
  try {
    // For iOS: base64 encoded .pkpass file
    const iosPassData = "H4sIAAAAAAAAA+2dbW/bNhSG..."; // base64 string

    // For Android: JWT token from Google Wallet API
    const androidToken = "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...";

    const passData = Platform.OS === 'ios' ? iosPassData : androidToken;

    const result = await ExpoWallet.addPass(passData);

    if (result === true) {
      Alert.alert('Success', 'Pass added to wallet successfully!');
    } else {
      Alert.alert('Cancelled', 'User cancelled adding pass to wallet');
    }
  } catch (error) {
    // Handle specific error codes
    if (error.code === 'E_PASS_LIBRARY_CANNOT_ADD') {
      Alert.alert('Error', 'Cannot add this pass to the wallet');
    } else if (error.code === 'E_PASS_LIBRARY_INVALID_DATA') {
      Alert.alert('Error', 'Invalid pass data format');
    } else if (error.code === 'E_PASS_LIBRARY_UNAVAILABLE') {
      Alert.alert('Error', 'Wallet is not available on this device');
    } else if (error.code === 'GOOGLE_WALLET_API_NOT_AVAILABLE') {
      Alert.alert('Error', 'Google Wallet API is not available');
    } else {
      Alert.alert('Error', 'Failed to add pass to wallet');
    }
    console.error('Wallet error:', error);
  }
};

```

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

### Add Pass to Wallet (React Native)

Source: https://github.com/giulio987/expo-wallet/blob/master/README.md

This JavaScript function demonstrates how to add a pass to the user's Wallet. It conditionally uses a base64 encoded string for iOS and a token for Android, based on the platform.

```javascript
const addToWallet = async () => {
  try {
    const res = await ExpoWallet.addPass(Platform.OS === "ios" ? pass : token);
  } catch (error) {}
};
```

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