React Native Google One Tap Sign In

Features

• Support all 3 types of authentication methods (standard, with server-side validation or with offline access (aka server side access))
• Promise-based API consistent between Android and iOS
• Typings for TypeScript and Flow
• Native signin buttons

Project setup and initialization

For RN >= 0.60 please use version installed from react-native-google-one-tap-signin

yarn add react-native-google-one-tap-signin

For RN <= 0.59 use version 2 installed from react-native-google-one-tap-signin

yarn add react-native-google-one-tap-signin

Public API

1. GoogleOneTapSignIn

import {
  GoogleOneTapSignIn,
  GoogleOneTapSignInButton,
  statusCodes,
} from 'react-native-google-one-tap-signin';

configure(options)

It is mandatory to call this method before attempting to call signIn() and signInSilently(). This method is sync meaning you can call signIn / signInSilently right after it. In typical scenarios, configure needs to be called only once, after your app starts. In the native layer, this is a synchronous call.

Example usage with default options: you get user email and basic profile info.

import { GoogleOneTapSignIn } from 'react-native-google-one-tap-signin';

GoogleOneTapSignIn.configure();

Example to access Google Drive both from the mobile application and from your backend server:

GoogleOneTapSignIn.configure({
  webClientId: '<FROM DEVELOPER CONSOLE>', // client ID of type WEB for your server (needed to verify user ID and offline access)
});

signIn()

Prompts a modal to let the user sign in into your application. Resolved promise returns an userInfo object. Rejects with error otherwise.

// import statusCodes along with GoogleSignin
import { GoogleOneTapSignIn, statusCodes } from 'react-native-google-one-tap-signin';

// Somewhere in your code
signIn = async () => {
  try {
    await GoogleOneTapSignIn.hasPlayServices();
    const userInfo = await GoogleOneTapSignIn.signIn();
    this.setState({ userInfo });
  } catch (error) {
    if (error.code === statusCodes.SIGN_IN_CANCELLED) {
      // user cancelled the login flow
    } else if (error.code === statusCodes.IN_PROGRESS) {
      // operation (e.g. sign in) is in progress already
    } else if (error.code === statusCodes.PLAY_SERVICES_NOT_AVAILABLE) {
      // play services not available or outdated
    } else {
      // some other error happened
    }
  }
};

signInSilently()

May be called eg. in the componentDidMount of your main component. This method returns the current user and rejects with an error otherwise.

To see how to handle errors read signIn() method

getCurrentUserInfo = async () => {
  try {
    const userInfo = await GoogleOneTapSignIn.signInSilently();
    this.setState({ userInfo });
  } catch (error) {
    if (error.code === statusCodes.SIGN_IN_REQUIRED) {
      // user has not signed in yet
    } else {
      // some other error
    }
  }
};

savePassword(userId, password)

This method has to be called once a user has performed a normal sign in or sign up to save its userId and password for automatic login in next sessions

signOut()

Removes user session from the device.

signOut = async () => {
  try {
    await GoogleOneTapSignIn.signOut();
    this.setState({ user: null }); // Remember to remove the user from your app's state as well
  } catch (error) {
    console.error(error);
  }
};

hasPlayServices(options)

Checks if device has Google Play Services installed. Always resolves to true on iOS.

Presence of up-to-date Google Play Services is required to show the sign in modal, but it is not required to perform calls to configure and signInSilently. Therefore, we recommend to call hasPlayServices directly before signIn.

try {
  await GoogleOneTapSignIn.hasPlayServices({ showPlayServicesUpdateDialog: true });
  // google services are available
} catch (err) {
  console.error('play services are not available');
}

hasPlayServices accepts one parameter, an object which contains a single key: showPlayServicesUpdateDialog (defaults to true). When showPlayServicesUpdateDialog is set to true the library will prompt the user to take action to solve the issue, as seen in the figure below.

You may also use this call at any time to find out if Google Play Services are available and react to the result as necessary.

[![prompt install]]

statusCodes

These are useful when determining which kind of error has occured during sign in process. Import statusCodes along with GoogleSignIn. Under the hood these constants are derived from native GoogleSignIn error codes and are platform specific. Always prefer to compare error.code to statusCodes.SIGN_IN_CANCELLED or statusCodes.IN_PROGRESS and not relying on raw value of the error.code.

| Name | Description | | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | SIGN_IN_CANCELLED | When user cancels the sign in flow | | IN_PROGRESS | Trying to invoke another operation (eg. signInSilently) when previous one has not yet finished. If you call eg. signInSilently twice, 2 calls to signInSilently in the native module will be done. The promise from the first call to signInSilently will be rejected with this error, and the second will resolve / reject with the result of the native module. | | SIGN_IN_REQUIRED | Useful for use with signInSilently() - no user has signed in yet | | PLAY_SERVICES_NOT_AVAILABLE | Play services are not available or outdated, this can only happen on Android |

Example how to use statusCodes.

2. GoogleOneTapSignInButton

![signin button]

import { GoogleOneTapSignIn, GoogleOneTapSignInButton } from 'react-native-google-one-tap-signin';

render() {
  <GoogleSigninButton
    style={{ width: 192, height: 48 }}
    size={GoogleOneTapSignInButton.Size.Wide}
    color={GoogleOneTapSignInButton.Color.Dark}
    onPress={this._signIn}
    disabled={this.state.isSigninInProgress} />
}

Props

size

Possible values:

• Size.Icon: display only Google icon. Recommended size of 48 x 48.
• Size.Standard: icon with 'Sign in'. Recommended size of 230 x 48.
• Size.Wide: icon with 'Sign in with Google'. Recommended size of 312 x 48.

Default: Size.Standard. Given the size prop you pass, we'll automatically apply the recommended size, but you can override it by passing the style prop as in style={{ width, height }}.

color

Possible values:

• Color.Dark: apply a blue background
• Color.Light: apply a light gray background

disabled

Boolean. If true, all interactions for the button are disabled.

onPress

Handler to be called when the user taps the button

[Inherited View props...]

3. userInfo

Example userInfo which is returned after successful sign in.

{
  idToken: string,
  serverAuthCode: string,
  scopes: Array<string>, // on iOS this is empty array if no additional scopes are defined
  user: {
    id: string,
    name: string // full name
    givenName: string,
    familyName: string,
    password: string,
    photo: string, // url
  }
}

Want to contribute?

Check out the contributor guide!

Notes

Calling the methods exposed by this package may involve remote network calls and you should thus take into account that such calls may take a long time to complete (eg. in case of poor network connection).

idToken Note: idToken is not null only if you specify a valid webClientId. webClientId corresponds to your server clientID on the developers console. It HAS TO BE of type WEB

Additional scopes

The default requested scopes are email and profile.

If you want to manage other data from your application (for example access user agenda or upload a file to drive) you need to request additional permissions. This can be accomplished by adding the necessary scopes when configuring the GoogleOneTapSignIn instance.

Please visit https://developers.google.com/identity/protocols/googlescopes or https://developers.google.com/oauthplayground/ for a list of available scopes.

Troubleshooting

Please see the troubleshooting section in the Android guide and iOS guide.

Licence

(MIT)