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PnP React Native - v3 to v4

Third parameter to web3auth constructor​

To introduce session management without storing the private key in the device, a new parameter is introduced to the web3auth constructor. This is the Storage parameter.

In Expo-managed workflow​

When using our SDK with an Expo-based React Native app (aka managed workflow), you have to install the expo-web-browser package as a WebBrowser implementation. You also need to install expo-secure-store to store the user's session.

expo install expo-web-browser expo-secure-store
import * as WebBrowser from 'expo-web-browser'
import * as SecureStore from 'expo-secure-store'
import Web3Auth, { LOGIN_PROVIDER, OPENLOGIN_NETWORK } from '@web3auth/react-native-sdk'

const clientId = 'YOUR WEB3AUTH CLIENT ID'

const web3auth = new Web3Auth(WebBrowser, SecureStore, {
  clientId,
  network: OPENLOGIN_NETWORK.TESTNET, // or other networks
})

In Bare React native workflow​

Install Web3Auth's React Native SDK in your React Native project. When using our SDK with a bare workflow React Native app, you have to install a WebBrowser implementation made by us and a Storage implementation provided by react-native.

npm install --save @toruslabs/react-native-web-browser react-native-encrypted-storage
import * as WebBrowser from '@toruslabs/react-native-web-browser'
import EncryptedStorage from 'react-native-encrypted-storage'
import Web3Auth, { LOGIN_PROVIDER, OPENLOGIN_NETWORK } from '@web3auth/react-native-sdk'

const clientId = 'YOUR_WEB3AUTH_CLIENT_ID'

const web3auth = new Web3Auth(WebBrowser, EncryptedStorage, {
  clientId,
  network: OPENLOGIN_NETWORK.TESTNET, // or other networks
})

Polyfilling required are different​

For Bare React Native workflow​

Add globals.js file to your project and import it into your index.js file.

globals.js
global.Buffer = require('buffer').Buffer

// Needed so that 'stream-http' chooses the right default protocol.
global.location = {
  protocol: 'file:',
}

global.process.version = 'v16.0.0'
if (!global.process.version) {
  global.process = require('process')
  console.log({ process: global.process })
}

process.browser = true
index.js
import { AppRegistry } from 'react-native'
import './globals'
import App from './App'
import { name as appName } from './app.json'
console.log('index.js')
AppRegistry.registerComponent(appName, () => App)

Then, add the following to your metro-config.js file.

info

Install empty-module, crypto-browserify and readable-stream packages.

npm install --save empty-module crypto-browserify readable-stream
metro.config.js
const { getDefaultConfig } = require('metro-config')

module.exports = (async () => {
  const {
    resolver: { sourceExts, assetExts },
  } = await getDefaultConfig(__dirname)

  const defaultSourceExts = [...sourceExts, 'svg', 'mjs', 'cjs']

  return {
    resolver: {
      extraNodeModules: {
        assert: require.resolve('empty-module'), // assert can be polyfilled here if needed
        http: require.resolve('empty-module'), // stream-http can be polyfilled here if needed
        https: require.resolve('empty-module'), // https-browserify can be polyfilled here if needed
        os: require.resolve('empty-module'), // os-browserify can be polyfilled here if needed
        url: require.resolve('empty-module'), // url can be polyfilled here if needed
        zlib: require.resolve('empty-module'), // browserify-zlib can be polyfilled here if needed
        path: require.resolve('empty-module'),
        crypto: require.resolve('crypto-browserify'),
        stream: require.resolve('readable-stream'),
      },

      assetExts: assetExts.filter(ext => ext !== 'svg'),

      sourceExts: process.env.TEST_REACT_NATIVE
        ? ['e2e.js'].concat(defaultSourceExts)
        : defaultSourceExts,
    },
    transformer: {
      getTransformOptions: async () => ({
        transform: {
          experimentalImportSupport: false,
          inlineRequires: true,
        },
      }),
    },
  }
})()

For Expo managed workflow​

Before running npm run ios or npm run android in your Expo-managed workflow project, run the following command.

npx expo prebuild

This generates the native folder structure for your project, just like you would have in a bare workflow project. This is required for the polyfills to work.

Create a globals.js file in your project and import it into your index.js file.

globals.js
global.Buffer = require('buffer').Buffer

// Needed so that 'stream-http' chooses the right default protocol.
global.location = {
  protocol: 'file:',
}

global.process.version = 'v16.0.0'
if (!global.process.version) {
  global.process = require('process')
  console.log({ process: global.process })
}

process.browser = true

Then add this line to your index.js file.

index.js
import './globals'

Once you have done the above, create a new metro.config.js file in your project and add the following to it.

info

Install @expo/metro-config, empty-module, crypto-browserify and readable-stream packages.

npm install --save @expo/metro-config empty-module crypto-browserify readable-stream
metro.config.js
const { getDefaultConfig } = require('expo/metro-config')

module.exports = (async () => {
  const {
    resolver: { sourceExts, assetExts },
  } = await getDefaultConfig(__dirname)

  const defaultSourceExts = [...sourceExts, 'svg', 'mjs', 'cjs']

  return {
    resolver: {
      extraNodeModules: {
        assert: require.resolve('empty-module'), // assert can be polyfilled here if needed
        http: require.resolve('empty-module'), // stream-http can be polyfilled here if needed
        https: require.resolve('empty-module'), // https-browserify can be polyfilled here if needed
        os: require.resolve('empty-module'), // os-browserify can be polyfilled here if needed
        url: require.resolve('empty-module'), // url can be polyfilled here if needed
        zlib: require.resolve('empty-module'), // browserify-zlib can be polyfilled here if needed
        process: require.resolve('empty-module'), // process can be polyfilled here if needed
        path: require.resolve('empty-module'),
        crypto: require.resolve('crypto-browserify'),
        stream: require.resolve('readable-stream'),
      },

      assetExts: assetExts.filter(ext => ext !== 'svg'),

      sourceExts: process.env.TEST_REACT_NATIVE
        ? ['e2e.js'].concat(defaultSourceExts)
        : defaultSourceExts,
    },
    transformer: {
      getTransformOptions: async () => ({
        transform: {
          experimentalImportSupport: false,
          inlineRequires: true,
        },
      }),
    },
  }
})()

web3auth.login() does not return any response​

Previous versions of the SDK returned a response object with the login() method. This is no longer the case. The login() method now returns a Promise<void>. You can use the getters such as the web3auth.privKey() to get the private key of the user (default is secp256k1 key). Or use web3auth.ed25519Key() to get the ed25519 key. Lastly, for userInfo, instead of accessing the object properties directly you can use the web3auth.userInfo(). Types for the react-native PnP SDK.

import { EncryptedStorage } from './types/IEncryptedStorage'
import { SecureStore } from './types/IExpoSecureStore'
import { IWeb3Auth, SdkInitParams, SdkLoginParams, State } from './types/interface'
import { IWebBrowser } from './types/IWebBrowser'
declare class Web3Auth implements IWeb3Auth {
  private initParams
  private webBrowser
  private keyStore
  private state
  private sessionManager
  constructor(
    webBrowser: IWebBrowser,
    storage: SecureStore | EncryptedStorage,
    initParams: SdkInitParams
  )
  get privKey(): string
  get ed25519Key(): string
  init(): Promise<void>
  login(options: SdkLoginParams): Promise<void>
  logout(): Promise<void>
  userInfo(): State['userInfo']
  private _syncState
  private request
  private _authorizeSession
}
export default Web3Auth

Check out our react-native PnP examples in the PnP examples repo to know how to use the new SDK methods.

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