The Para SDK for React Native allows you to easily integrate secure and scalable wallet functionalities into your mobile applications, utilizing the device’s Native Passkeys for secure wallet management. This guide covers the installation, setup, and usage of the Para SDK.

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Prerequisites

To use Para, you need an API key. This key authenticates your requests to Para services and is essential for integration.
Don’t have an API key yet? Request access to the Developer Portal to create API keys, manage billing, teams, and more.

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Dependency Installation

Install the required packages for Para SDK integration: 
npm install @getpara/react-native-wallet@alpha @react-native-async-storage/async-storage react-native-keychain react-native-modpow react-native-passkey react-native-quick-base64 @craftzdog/react-native-buffer react-native-quick-crypto react-native-config react-native-inappbrowser-reborn --save-exact

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Project Setup

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Platform-Specific Configuration

In order for passkeys to work, you need to set up associated domains in your Xcode project linked to the Para domain.
Associated Domains

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Set Up Associated Domains

  1. Open your project in Xcode
  2. Select your target and go to “Signing & Capabilities”
  3. Click ”+ Capability” and add “Associated Domains”
  4. Add the following domains:
    • webcredentials:app.beta.usecapsule.com
    • webcredentials:app.usecapsule.com
For additional information on associated domains, refer to the Apple Developer documentation.
Important: Your teamId + bundleIdentifier must be registered with the Para team to set up associated domains. For example, if your Team ID is A1B2C3D4E5 and Bundle Identifier is com.yourdomain.yourapp, provide A1B2C3D4E5.com.yourdomain.yourapp to Para. This is required by Apple for passkey security. Note: Allow up to 24 hours for domain propagation.

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Install CocoaPods for native dependencies:

cd ios
bundle install
bundle exec pod install
cd ..
Remember to run pod install after adding new dependencies to your project.

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Configure Metro Bundler

Create or update metro.config.js in your project root:
metro.config.js
const { getDefaultConfig, mergeConfig } = require("@react-native/metro-config");

const config = {
  resolver: {
    extraNodeModules: {
      crypto: require.resolve("react-native-quick-crypto"),
      buffer: require.resolve("@craftzdog/react-native-buffer"),
    },
  },
};

module.exports = mergeConfig(getDefaultConfig(__dirname), config);

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Add Para Shim

Import the Para shim as the FIRST import in your application’s entry file (typically index.js): 
import "@getpara/react-native-wallet/shim";
// Other imports...
Important: The shim import must come before any other imports to ensure required modules are available.

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Using the Para SDK

The Para SDK provides two main authentication methods: email-based and phone-based. Each method supports creating a new user and logging in an existing user. Both flows utilize Native Passkeys for secure and seamless authentication. Follow the steps below to implement these flows in your React Native application.
Beta Testing Credentials In the BETA Environment, you can use any email ending in @test.getpara.com (like dev@test.getpara.com) or US phone numbers (+1) in the format (area code)-555-xxxx (like (425)-555-1234). Any OTP code will work for verification with these test credentials. These credentials are for beta testing only. You can delete test users anytime in the beta developer console to free up user slots.

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Create New User with Email

This flow guides you through the process of registering a new user with email, verifying their email, and setting up their wallet.

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Initialize Para Client

First, set up the Para client to enable SDK interactions:
import { ParaMobile } from "@getpara/react-native-wallet";

const para = new ParaMobile(
  YOUR_API_KEY, 
  undefined, 
  { disableWorkers: true }
);
If you’re using a legacy API key (one without an environment prefix) you must provide the Environment as the first argument to the ParaMobile constructor. You can retrieve your updated API key from the Para Developer Portal at https://developer.getpara.com/

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Sign Up or Log In

Use the signUpOrLogIn method to handle both new user registration and existing user authentication:
const handleContinue = async (email: string) => {
  try {
    const authState = await para.signUpOrLogIn({ auth: { email } });
    
    if (authState?.stage === 'verify') {
      // New user - show OTP verification
      setShowOTP(true);
    } else if (authState?.stage === 'login') {
      // Existing user - proceed with passkey login
      await para.loginWithPasskey();
    }
  } catch (error) {
    // Handle error
  }
};

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Verify Email

Once the user receives the verification code, call the verifyNewAccount method to confirm their email:
const handleVerifyEmail = async (verificationCode: string) => {
  try {
    const authState = await para.verifyNewAccount({ verificationCode });
    return authState;
  } catch (error) {
    // Handle error
  }
};

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Register Passkey

Use the returned authState to register the user’s passkey:
const handleRegisterPasskey = async (authState: any) => {
  try {
    await para.registerPasskey(authState);
  } catch (error) {
    // Handle error
  }
};

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Complete New User Flow

Implement the full flow by combining all the previous steps:
const handleNewUserFlow = async (email: string, verificationCode: string) => {
  try {
    // Step 1: Sign up or log in
    const authState = await para.signUpOrLogIn({ auth: { email } });
    
    if (authState?.stage === 'verify') {
      // Step 2: Verify email
      const verifiedAuthState = await para.verifyNewAccount({ verificationCode });
      
      // Step 3: Register passkey
      await para.registerPasskey(verifiedAuthState);
    }
  } catch (error) {
    // Handle error
  }
};

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Login Existing User with Email

This flow demonstrates how to authenticate an existing user using their email and passkey.

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Login Existing User

For existing users, use the signUpOrLogIn method which will return a login stage, then use loginWithPasskey:
const handleLogin = async (email: string) => {
  try {
    const authState = await para.signUpOrLogIn({ auth: { email } });
    
    if (authState?.stage === 'login') {
      await para.loginWithPasskey();
    }
  } catch (error) {
    // Handle error
  }
};
By following these steps, you can implement a secure and user-friendly authentication system in your React Native application using the Para SDK, with support for both email and phone-based authentication methods.

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Wallet Management

After successful authentication, you must create wallets for the blockchain networks you want to use:

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Creating Wallets

import { WalletType } from "@getpara/react-native-wallet";

// Create wallets for different blockchain types
await para.createWallet({type: WalletType.EVM, skipDistribute: false});
await para.createWallet({type: WalletType.SOLANA, skipDistribute: false});
await para.createWallet({type: WalletType.COSMOS, skipDistribute: false});

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Retrieving Wallet Information

// Get existing wallets by type
const evmWallet = para.getWalletsByType(WalletType.EVM)[0];
const solanaWallet = para.getWalletsByType(WalletType.SOLANA)[0];
const cosmosWallet = para.getWalletsByType(WalletType.COSMOS)[0];

// Check if wallet exists and get address
if (evmWallet?.address) {
  console.log('EVM Address:', evmWallet.address);
}

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Complete Integration Example

const setupEVMWallet = async () => {
  try {
    // Check if EVM wallet exists, create if not
    let wallet = para.getWalletsByType(WalletType.EVM)[0];
    if (!wallet) {
      await para.createWallet({type: WalletType.EVM, skipDistribute: false});
      wallet = para.getWalletsByType(WalletType.EVM)[0];
    }
    
    // Now ready for EVM operations
    return wallet?.address;
  } catch (error) {
    console.error('Wallet setup failed:', error);
  }
};
Important: Wallet creation must be completed after authentication but before any blockchain operations (signing transactions, getting balances, etc.).

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Examples

For practical implementation of the Para SDK in React Native environments, check out our GitHub repository:

React Native Integration Examples

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Troubleshooting

If you encounter issues during the integration or usage of the Para SDK in your React Native application, here are some common problems and their solutions:
For a more comprehensive list of solutions, visit our troubleshooting guide:

Troubleshooting

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Next Steps

After integrating Para, you can explore other features and integrations to enhance your Para experience.

EVM Integration

Solana Integration

Cosmos Integration