Link SDK React Native Wrapper

The React Native Wrapper for LinkSDK allows you to do all the functions that can be achieved with the LinkSDK on web, from linking bank accounts to initiating payments.

Installation

Install lean-react-native

npm install --save lean-react-native

If you don't already have react-native-webview added to your project you should also install this

npm install --save react-native-webview

Go to your ios folder and run

pod install

Usage

The Wrapper uses a ref to access internal functions.

import React, { useRef } from 'react'
import { View, TouchableOpacity, Text } from 'react-native'
import LinkSDK from 'lean-react-native'

const App = () => {
    const Lean = useRef(null)

    return (
        <View>
            <TouchableOpacity 
                onPress={() => Lean.current.link({ customer_id: "CUSTOMER_ID" })}
            >
                <Text>Link Account</Text>
            </TouchableOpacity>

            <LinkSDK
                ref={Lean}
                appToken="MY_APP_TOKEN"
                version="{version_number}"
                country="{country_of_operation}"
                sandbox
            />
        </View>
    )
}

export default App

---

API Reference

Prop	Required	Description
ref	True	The reference for the LinkSDK component
appToken	True	The App Token can be retrieved from your Lean App Dashboard
callback	False	A function that you want the SDK to callback to upon closing of the SDK (whether successful or failed)
version	False	Which version of the LinkSDK you want to load (defaults to @latest)
country	False	Which country you are operating in (defaults to ArabEmirates) (options are SaudiArabia and ArabEmirates)
sandbox	False	Whether the LinkSDK is in sandbox or not (defaults to False)

Methods

The LinkSDK supports 6 methods. link, connect, reconnect, createPaymentSource, updatePaymentSource, and pay.

link

Use link when you want to create an Entity for use with the Data API.

    Lean.current.link({
        customer_id: "YOUR_CUSTOMER_ID",
        permissions: ["identity","accounts","balance","transactions"],
        bank_identifier: "LEAN_MB1", //optional
        success_redirect_url: "myapp://www.myapp.com/success", // required for Open Banking banks
        fail_redirect_url: "myapp://www.myapp.com/success" // required for Open Banking banks
    })

Parameter	Required	Description
customer_id	True	The Customer you want to connect
bank_identifier	False	Skips the bank selection screen
permissions	True	An array of permissions can be identity, balance, accounts, transactions
success_redirect_url	False	The URI you want to redirect to after an open banking connection has been completed
fail_redirect_url	False	The URI you want to redirect to after an open banking connection has failed

---

connect

Use connect when you want to create an Entity and a Payment Source for use with the Data and Payments APIs.

    Lean.current.connect({
        customer_id: "YOUR_CUSTOMER_ID",
        permissions: ["identity","accounts","balance","transactions", "payments"],
        bank_identifier: "LEAN_MB1",
        payment_destination_id: "PAYMENT_DEST_ID",
        success_redirect_url: "myapp://www.myapp.com/success", // required for Open Banking banks
        fail_redirect_url: "myapp://www.myapp.com/success" // required for Open Banking banks
    })

Parameter	Required	Description
customer_id	True	The Customer you want to connect
bank_identifier	False	Skips the bank selection screen
permissions	True	An array of permissions can be identity, balance, accounts, transactions or payments
payment_destination_id	False	The payment destination you want to create a beneficiary with
success_redirect_url	False	The URI you want to redirect to after an open banking connection has been completed
fail_redirect_url	False	The URI you want to redirect to after an open banking connection has failed

---

reconnect

Use reconnect when a call to an Entity returns RECONNECT_REQUIRED.

    Lean.current.reconnect({
        reconnect_id: "RECONNECT_ID"
    })

Parameter	Required	Description
reconnect_id	True	The reconnect_id returned from the Lean API
success_redirect_url	False	The URI you want to redirect to after an open banking connection has been completed
fail_redirect_url	False	The URI you want to redirect to after an open banking connection has failed

---

createPaymentSource

Use createPaymentSource to create a Payment Source for use the Payments API.

    Lean.current.createPaymentSource({ 
        customer_id: "CUSTOMER_ID",
        bank_identifier: "LEAN_MB1",
        success_redirect_url: "myapp://www.myapp.com/success", // required for Open Banking banks
        fail_redirect_url: "myapp://www.myapp.com/success" // required for Open Banking banks
    })

Parameter	Required	Description
customer_id	True	The Customer you want to create a payment source for
bank_identifier	False	Skips the bank selection screen
success_redirect_url	False	The URI you want to redirect to after an open banking connection has been completed
fail_redirect_url	False	The URI you want to redirect to after an open banking connection has failed

---

updatePaymentSource

Use updatePaymentSource to create a new beneficiary within an existing Payment Source.

    Lean.current.updatePaymentSource({ 
        customer_id: "CUSTOMER_ID",
        payment_source_id: "PAYMENT_SOURCE_ID",
        payment_destination_id: "PAYMENT_DESTINATION_ID"
    })

Parameter	Required	Description
customer_id	True	The Customer you want to create a payment source for
payment_source_id	True	The Payment Source you want to update
payment_destination_id	True	The Payment Destination you want to add

---

pay

Use pay to initiate a payment against a Payment Intent.

    Lean.current.pay({ 
        payment_intent_id: "PAYMENT_INTENT_ID",
        account_id: "ACCOUNT_ID"
    })

Parameter	Required	Description
payment_intent_id	True	The Customer you want to create a payment source for
account_id	False	Allows you to use a specific account for a customer payment source (available at payment_source.account[n].id)

---

Callbacks

By providing a callback into the component, the LinkSDK will report back with an object in the following format:

{
    method: "LINK",
    status: "SUCCESS",
    message: "Some message about the state of the application",
    exit_point: "SUCCESS",
    secondary_status: "SUCCESS",
    bank: {
        bank_identifier: "DIB_UAE",
        is_supported: true
    }
}

Attribute	Type	Description
method	ENUM	The flow that initiated the call. LINK, RECONNECT, CREATE_PAYMENT_SOURCE and PAY
status	ENUM	The status of the SDK at close. SUCCESS - completed successfully. CANCELLED - user cancelled the flow. ERROR - something went wrong
message	string	Further details on the status
exit_point	String	The screen the user was on when they closed the SDK
secondary_status	String	Useful when ERROR is the status - correlates to the ERROR reason if known.
bank.bank_identifier	String	The Lean identifier for the bank the user was trying to connect to
bank.is_supported	Bool	Whether the bank is supported by Lean

Troubleshooting

Webview crashes on Android

You can disable hardware acceleration on the webview by passing android specific props into the webview:

<LinkSDK
    webViewProps={{
        androidHardwareAccelerationDisabled: true,
    }}
    appToken: "YOUR_APP_TOKEN"
    sandbox: false
>

JDK version issues on Android

You may get gradle errors if you have a different JDK on the development system compared to the local JDK delivered with the Android SDK. The solution is to set JAVA_HOME in gradlew or gradlew.bat to point to the SDK JDK path. On Windows:

SET JAVA_HOME="\Program Files\Android\Android Studio\jre"