Yoti Button SDK for React Native

Yoti button component for React Native Android and iOS.

The purpose of the mobile SDK is to provide 3rd party applications the ability to request attributes from a Yoti user through Yoti mobile App. It is an interaction between a 3rd Party app and the Yoti app facilitated by a very lightweight SDK. This repository contains the module which enables your users to share their identity details with your application in a secure and trusted way.

Prerequisite

Before you begin, kindly make sure you have at the minimum created an application and scenario on the Yoti Hub according to the documentation.

This SDK does not come with any methods for making backend calls to your server APIs.

React Native >= 0.60.0 installation

yarn add @getyoti/react-native-yoti-button

Navigate to your iOS folder and update pods with:

pod install

React Native autolinking will handle the rest of the native configuration. Should autolinking fail, consult the troubleshooting instructions.

React Native 0.59.x installation

Install the library with:

yarn add @getyoti/react-native-yoti-button

Link the library:

react-native link @getyoti/react-native-yoti-button

If you're using CocoaPods, navigate to your ios and update your Podfile:

  pod 'Folly', :podspec => '../node_modules/react-native/third-party-podspecs/Folly.podspec'
+  `pod 'react-native-yoti-button', :path => '../node_modules/react-native-yoti-button/react-native-yoti-button.podspec'`
end

And then your pods with:

pod install

If autolinking fails, refer to the troubleshooting instructions.

Inter-app communication

Once the user has made a decision in the Yoti app to share or not share their identity with your application, the Yoti app will send the user back to your application.

No further configuration is required on Android because the SDK registers Broadcasts on its own.

On iOS however, we'll have to add some configuration for handling deep links. If you do not have deeplinking configured, consult the official setup documentation then proceed below.

Add Yoti as a query scheme to your app's Info.plist file:

...
<plist version="1.0">
+<dict>
+	<key>LSApplicationQueriesSchemes</key>
+	<array>
+  		<string>easyid</string>
+  		<string>yoti</string>
+	</array>
...

Add RNYotiButtonViewManager to the handlers along with RCTLinkingManager (if need be):

• Add RNYotiButtonViewManager to your imports in ios/Appelegate.m

  #import <react-native-yoti-button/RNYotiButtonViewManager.h>

• Extend your handlers

  - (BOOL)application:(UIApplication *)application
      openURL:(NSURL *)url
      options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options
  {
      return [RNYotiButtonViewManager application:application openURL:url options:options] ||
             [RCTLinkingManager application:application openURL:url options:options];
  }

Usage

The SDK exposes a single component which handles communication between your app and the Yoti app on a user's device.

All props are required, with the exception of theme.

import React from 'react';
import { AppRegistry} from 'react-native';

import YotiButton, {
  THEME_EASYID,
  THEME_PARTNERSHIP,
  THEME_YOTI,
} from '@getyoti/react-native-yoti-button';

function AppExample() {
    return (
      <YotiButton
        clientSDKID="YOUR_CLIENT_SDK_ID"
        scenarioID="YOUR_SCENARIOD_ID"
        useCaseID="YOUR_USE_CASE_ID"
        theme={THEME_YOTI}
        onSuccess={({useCaseId, token}) => {
          // Handle successful Yoti authentication.
          // You can send the token to your backend, for example, and
          // request the user's profile using any of the backend SDKs.
        }}
        onFail={error => {
          // Handle general failures such as the user not completing the Share
          // process in the Yoti app, or when the SDK fails to retrieve a useCaseID and token
          // the error object can either be populated or `undefined`
        }}
        onOpenYotiApp={() => {
         // It is a notification that the intent has been sent to the Yoti app.
         // Handle specific behaviour if needed.
         // You may want to restore your app's UI state when this happens.
        }}
        onStartScenario={() => {
          // Called when your scenario is about to be started.
        }}
        onStartScenarioError={error => {
          // Handler for when the SDK fails to start a scenario.
          // This may occur due to incorrect API keys or a network error.
          // the error object can either be populated or `undefined`
        }}
      />
    );
}

AppRegistry.registerComponent('App', () => AppExample);

The SDK supports a few themes which have slightly different behaviours:

Name	Colour	Target App
THEME_YOTI	Blue	Digital ID Apps
THEME_EASYID	Red with white logo	EasyID App
THEME_PARTNERSHIP	White with supplementary view	Digital ID Apps

Depending on which theme you select it may target a specific app or have a supplementary view underneath it. The way each themed button is used however remains the same.

To set the theme simply alter theme prop on your YotiButton component.

Localisation

On Android, you may add values to the android/app/src/main/res/values/strings.xml file, creating the strings.xml file if it doesn't exist already, according to the keys below:

<resources>
    <string name="app_name">YotiSDK</string>
    <string name="yoti.sdk.error.yoti_app_version_incompatible">The current Yoti app installed is not compatible, please update your Yoti app.</string>
    <string name="yoti.sdk.yoti.button.label">CONTINUE WITH YOTI</string>
    <string name="yoti.sdk.easyid.button.label">Continue with Post Office EasyID</string>
    <string name="yoti.sdk.partnership.button.label">Continue with your Digital ID</string>
    <string name="yoti.sdk.support_info.text">Works with:</string>
</resources>

For iOS, include a .strings file named YotiButtonSDK.strings in your application bundle and specify the following keys based on the theme:

"yoti.sdk.yoti.button.label" = "Label for Yoti theme";
"yoti.sdk.partnership.button.label" = "Label for Partnership theme";
"yoti.sdk.easyid.button.label" = "Label for EasyID theme";
"yoti.sdk.support_info.text" = "Support info text for Partnership theme";

Troubleshooting

Resolving autolinking failures on Android and iOS

iOS

Linker errors pertaining to Swift libraries such as swiftFoundation can be resolved with one or more of the solutions mentioned in this oft-quoted StackOverflow discussion, depending on your React Native version and project setup.

Android

Android linking is performed in 3 steps:

android/settings.gradle

Add the following to your settings.gradle file as a new entry before the last line which has include ':app':

+   include ':react-native-yoti-button'
+   project(':react-native-yoti-button').projectDir = new
+   File(rootProject.projectDir, '../node_modules/react-native-yoti-button/src/android')

    include ':app'

android/app/build.gradle

Find the dependencies block in your build.gradle file and add implementation project(':react-native-yoti-button'):

dependencies {
   ...
+   implementation project(':react-native-yoti-button')
}

android/app/src/main/java/..../MainApplication.java

Add an import for the package:

import android.app.Application;
import com.facebook.react.ReactApplication;
+ import com.yoti.reactnative.RNYotiButtonPackage;

Find the getPackages function and add new RNYotiButtonPackage() to the list of packages.

@Override
protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
+       new RNYotiButtonPackage(),
        ...

Support

If you have any other questions please do not hesitate to contact [email protected]. Once we have answered your question we may contact you again to discuss Yoti products and services. If you'd prefer us not to do this, please let us know when you e-mail.