Node And React

Integrate hyper SDK to your React Web App using Hyperswitch-node

In this section, you will get details to Integrate Hyperswitch SDK using Node Backend and React Frontend

Before following these steps, please configure your payment methods here. Use this guide to integrate hyperswitch SDK to your React app. You can also use this demo app as a reference with your Hyperswitch credentials to test the setup.

1. Setup the server

1.1 Install the hyperswitch-node library

Install the package and import it in your code

$ npm install @juspay-tech/hyperswitch-node

1.2 Create a payment

Before creating a payment, import the hyper dependencies and initialize it with your API key. Get your API key from Hyperswitch dashboard.

const hyper = require("@juspay-tech/hyperswitch-node")(β€˜YOUR_API_KEY’);

Add an endpoint on your server that creates a Payment. Creating a Payment helps to establish the intent of the customer to start a payment. It also helps to track the customer’s payment lifecycle, keeping track of failed payment attempts and ensuring the customer is only charged once. Return the client_secret obtained in the response to securely complete the payment on the client.

// Create a Payment with the order amount and currency
app.post("/create-payment", async (req, res) => {
  try {
    const paymentIntent = await hyper.paymentIntents.create({
      currency: "USD",
      amount: 100,
    });
    // Send publishable key and PaymentIntent details to client
    res.send({
      clientSecret: paymentIntent.client_secret,
    });
  } catch (err) {
    return res.status(400).send({
      error: {
        message: err.message,
      },
    });
  }
});

In case your integrating the ExpressCheckout (mentioned later below), instead of creating multiple paymentIntents for the same customer session, you can also use paymentsUpdate API for better analytics.

2. Build checkout page on the client

2.1 Install the hyper-js and react-hyper-js libraries

Install the packages and import it into your code

$ npm install @juspay-tech/hyper-js
$ npm install @juspay-tech/react-hyper-js

2.2 Add hyper to your React app

Use hyper-js to ensure that you stay PCI compliant by sending payment details directly to Hyperswitch server.

import React, { useState, useEffect } from "react";
import { loadHyper } from "@juspay-tech/hyper-js";
import { hyperElements } from "@juspay-tech/react-hyper-js";

2.3 Load hyper-js

Call loadHyper with your publishable API keys to configure the library. To get an publishable Key please find it here.

const hyperPromise = loadHyper("YOUR_PUBLISHABLE_KEY",{
    customBackendUrl: "YOUR_BACKEND_URL",
    //You can configure this as an endpoint for all the api calls such as session, payments, confirm call.
});

2.4 Fetch the Payment and Initialise hyperElements

Immediately make a request to the endpoint on your server to create a new Payment as soon as your checkout page loads. The clientSecret returned by your endpoint is used to complete the payment.

useEffect(() => {
  // Create PaymentIntent as soon as the page loads
  fetch("/create-payment", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ items: [{ id: "xl-tshirt" }], country: "US" }),
  })
    .then((res) => res.json())
    .then((data) => setClientSecret(data.clientSecret));
}, []);

2.5 Initialise HyperElements

Pass the promise from loadHyper to the HyperElements component. This allows the child components to access the Hyper service via the HyperElements parent component. Additionally, pass the client secret as an options to the HyperElements component.

<div className="App">
  {clientSecret && (
    <HyperElements options={options} hyper={hyperPromise}>
      <CheckoutForm />
    </HyperElements>
  )}
</div>

2.6 Setup the state (optional)

Initialize a state to keep track of payment, display errors and control the user interface.

const [message, setMessage] = useState(null);
const [isLoading, setIsLoading] = useState(false);

2.7 Store a reference to Hyper

Access the hyper-js library in your CheckoutForm component by using the useHyper() and useWidgets() hooks. If you need to access Widgets via a class component, use the WidgetsConsumer instead. If you need to access Widgets via a class component, use the WidgetsConsumer instead. You can find the API for these methods here.

const hyper = useHyper();
const widgets = useWidgets();

3. Complete the checkout on the client

Key Features of Hyperswitch's Express Checkout

  • Fast Performance: One-click payment at checkout enables a smooth and frictionless payment experience to customers.

  • Multiple Payment Options: Supports ApplePay,Paypal Klarna, and GooglePay, giving customers a variety of payment choices on top of the speed in checkout.

  • Easy Integration: Our SDK can be easily integrated with web applications.

Benefits of Hyperswitch's Express Checkout Feature

  • Better User Experience: One-click payment makes shopping easier, leading to more sales and fewer abandoned carts.

  • Time Savings: Speeds up the checkout process, saving time for both customers and merchants.

  • Great for Mobile: Optimized for mobile shopping with ApplePay, Paypal and GooglePay integration for quick purchases on smartphones.

  • Collect billing and shipping details directly from the ApplePay, Klarna, GooglePay, Paypal

3.1 Add the ExpressCheckout

The Express Checkout Element gives you a single integration for accepting payments through one-click payment buttons. Supported payment methods include ApplePay, GooglePay and PayPal.

Add the ExpressCheckout to your Checkout. This embeds an iframe that displays configured payment method types supported by the browser available for the Payment, allowing your customer to select a payment method. The payment methods automatically collects the associated payment details for the selected payment method type.

Define paymentElementOptions:

var expressCheckoutOptions = {
  wallets: {
    walletReturnUrl: "https://example.com/complete",
    //Mandatory parameter for Wallet Flows such as Googlepay, Paypal and Applepay
  },
};
<ExpressCheckoutElement id="express-checkout" options={expressCheckoutOptions} />

3.2 Display payment status message

When Hyperswitch redirects the customer to the return_url, the payment_client_secret query parameter is appended by hyper-js. Use this to retrieve the Payment to determine what to show to your customer.

//Look for a parameter called `payment_intent_client_secret` in the url which gives a payment ID, which is then used to retrieve the status of the payment

const paymentID = new URLSearchParams(window.location.search).get(
  "payment_intent_client_secret"
);

if (!paymentID) {
  return;
}

hyper.retrievePaymentIntent(paymentID).then(({ paymentIntent }) => {
  switch (paymentIntent.status) {
    case "succeeded":
      setMessage("Payment succeeded!");
      break;
    case "processing":
      setMessage("Your payment is processing.");
      break;
    case "requires_payment_method":
      setMessage("Your payment was not successful, please try again.");
      break;
    default:
      setMessage("Something went wrong.");
      break;
  }
});

4. Elements Events

Some events are emitted by payment elements, listening to those events is the only way to communicate with these elements. All events have a payload object with the type of the Element that emitted the event as an elementType property. Following events are emitted by payment elements.

  • change

  • ready

  • focus

  • blur

4.1 Calling Elements events

First create instance of widgets using getElement function. It will return null if no matching type is found.

// Create instance of widgets
var paymentElement = widgets.getElement("payment");

// handle event
if (paymentelement) {
  // in place of "EVENT" use "change", "ready", "focus" etc.
  paymentElement.on("EVENT", callbackFn);
}

4.2 "change" event

The "change" event will be triggered when value changes in Payment element.

paymentElement.on("change", function (event) {
  // YOUR CODE HERE
});

Callback function will be fired when the event will be triggered. When called it will be passed an event object with the following properties.

{
  elementType: 'payment',   // The type of element that emitted this event.
  complete: false,          // If all required field are complete
  empty: false,             // if the value is empty.
  value: { type: "card" },  // current selected payment method like "card", "klarna" etc
}

4.3 "ready" event

The "ready" event will be triggered when payment element is full rendered and can accept "focus" event calls.

Callback for ready event will be triggered with following event object

{
  ready: boolean,   // true when payment element is full rendered
}

4.4 "focus", "blur" event

Focus and blur event triggered when respective event will be triggered in payment element.

Callback for these event will be triggered with following event object.

// Event object for focus event
{
  focus: boolean,   // true when focused on payment element
}

// Event object for blur event
{
  blur: boolean,
}

Congratulations! Now that you have integrated the Hyperswitch SDK on your app, you can customize the payment elements to blend with the rest of your app.

Next step:

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