Get Started on Mobile

Ramper's React Native SDK helps developers provide easy access to the Blockchain for non-native crypto users through their SSO accounts.

Installation

Our @ramper/react-native-core library handles authentication for our users through a supported SSO account. Once the user logs in, an ethereum wallet will be created for the user. If you are new to react native, we recommend you set up your environment properly first by visiting https://reactnative.dev/docs/environment-setup.

npm

$ npm install @ramper/react-native-core

yarn

$ yarn add @ramper/react-native-core

Install peer dependencies 

yarn add query-string react-native-keychain react-native-inappbrowser-reborn @react-native-community/clipboard @react-navigation/bottom-tabs @react-navigation/native @react-navigation/stack accordion-collapse-react-native date-fns react-native-raw-bottom-sheet react-query react-native-gesture-handler react-native-safe-area-context react-native-screens

Note: Follow the further installation steps of react-native-inappbrowser-reborn & react-navigation

Step 1

$ cd ios && pod install

Step 2

Secondly, our SDK uses deep links to communicate back with your application. In order to Configure Deep Links, you will need to get an app id by signing up at https://developer.ramper.xyz and apply the following steps:

iOS

Add the below code in your AppDelegate.m file

// Add the header at the top of the file:
#import <React/RCTLinkingManager.h>

// Add this above `@end`:
- (BOOL)application:(UIApplication *)application
   openURL:(NSURL *)url
   options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options
{
  return [RCTLinkingManager application:application openURL:url options:options];
}

Copy your bundle id as shown in the below screenshot:

Paste your bundle id in the identifier section and add ramper<appId> in the URI Scheme section: Make sure to not include the brackets <> in the URLScheme

Android

Add the following in your project/adnroid/app/src/main/AndroidManifest.xml file under Activity Tag

      <intent-filter>
      <!--  Make sure to not include the brackets <> in the scheme -->
        <data android:scheme="ramper<appId>" />
        <action android:name="android.intent.action.VIEW"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <category android:name="android.intent.category.BROWSABLE"/>
      </intent-filter>

Run your app

iOS

$ npx react-native run-ios

Android

$ npx react-native run-android

Usage

In your starting file import Ramper as below

import { Ramper } from '@ramper/react-native-core';

call configure passing your appId (required), locale (default: en), chainName (required) and authUrl (optional)

Ramper.configure({
  appId: 'appId',
  locale: 'kr' | 'en',
  chainName: 'ethereum',
});

Authentication

Show Sign In Screen

We have a pre-built screen that you can use to display all the sign in options for the customer:

import { RamperScreen } from '@ramper/react-native-core';
<RamperScreen
  providers={[
    {
      name: 'google' | 'facebook' | 'twitter' | 'apple'
    },
  ]}
  theme="light | dark"
  onSuccess={(user) => {
    //handle user
  }}
  onFailure={(error) => {
    // handle error
  }}
  onClose={() => {}}
  logo={require('mylogo') | { uri: 'mylogourl' }}
  browserProps // optional
/>

Check supported browser props for iOS and Android

Signing In Directly

If you want to create a custom Sign In page and only allow the user to sign in with a specific provider, you can invoke the signin method directly instead.

import { Auth } from '@ramper/react-native-core';

Auth.signin accepts three parameters:

Provider: (google | facebook | twitter | apple) browserProps (optional): check supported browser props for iOS and Android

try {
  const user = await Auth.signin(
    'google' | 'facebook' | 'twitter' | 'apple',
    browserProps, //optional
  );
  // handle response
} catch (error) {
  // handle error
}

Get User

After a user logs in or on app relaunch, you can call the getUser method to get the currently logged-in user's information.

try {
  const user = await Auth.getUser();
  // handle user
} catch (error) {
  // handle error
}

Wallet View

We also provide a Wallet View that allows your user to see their Ethereum wallet balance and conduct common actions.

Step 1

$ yarn add @ramper/react-native-evm

Step 2

import { WalletView } from '@ramper/react-native-core';
import { EthDataProvider } from '@ramper/react-native-evm';

Step 3

Use the wallet view component like this

<WalletView
  dataProviders={[{ name: 'ethereum', dataProvider: EthDataProvider }]}
  onCLose={() => {}} // this method will be called when the user clicks on the close button of wallet view
/>

Note: before using this component please make sure that the user is logged in by calling getUser method mentioned above.

Transactions

Sign out

import { Auth } from '@ramper/react-native-core';

try {
  const signout = await Auth.signOut(
    browserProps //optional
  );
  // handle signout
} catch (error) {
  // handle error
}

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