Kotlin with Node Backend

Integrate hyper SDK to your Kotlin App using payswitcher-node

In this section, you will get detailed instructions for integrating the PaySwitcher native Android SDK for your Android app

Use this guide to integrate hyper SDK to your Android app. You can use this as a reference with your PaySwitcher credentials to test the setup. You can also checkout the App on Google Play Store to test the payment flow.

Requirements

• Android 5.0 (API level 21) and above

• Android Gradle Plugin 7.3.1

• Gradle 7.5.1+

• AndroidX

1. Setup the server

1.1 Install the payswitcher-node library

Install the package and import it in your code

$ npm install @payswitcher/payswitcher-node

1.2 Create a payment

Before creating a payment, import the payswitcher-node dependencies and initialize it with your API key.

const hyper = require("@payswitcher/hyperwitch-node")(‘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,
      },
    });
  }
});

2. Build checkout page on your app

2.1 Configure your repository with PaySwitcher dependency

Add the following maven repository to the settings.gradle file

dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
           maven {
            url "https://maven.payswitcher.com/release/production/android/maven/1.2.7"
        }
    }
}

2.2 Add the PaySwitcher dependency

Add payswitcher-android to the dependencies block of your build.gradle file to install the SDK

dependencies {

    // PaySwitcher Android SDK
    implementation 'io.payswitcher:payswitcher-android:+'
}

2.3 Implement the HyperInterface

Implement the HyperInterface to your CheckoutActivity

class CheckoutActivity : AppCompatActivity(), HyperInterface {

    // ...
}

2.4 Setup the SDK and fetch a Payment

Setup the SDK with your publishable key

PaymentConfiguration.init(applicationContext, "YOUR_PUBLISHABLE_KEY");

Note: For the Setup, initialise PaymentConfiguration as:

PaymentConfiguration.initWithBackend(applicationContext, "YOUR_PUBLISHABLE_KEY", "YOUR_SERVER_URL");

Fetch a payment by requesting your server for a payment as soon as your view is loaded. Store a reference to the client_secret returned by the server; the Payment Sheet will use this secret to complete the payment later.

3. Complete the payment on your app

Create a PaymentSheet instance using the client_secret retrieved from the previous step. Present the payment page from your view controller and use the PaymentSheet.Configuration struct for customising your payment page.

val configuration = PaymentSheet.Configuration("Your_app, Inc.")

// Present Payment Page
paymentSheet.presentWithPaymentIntent(paymentIntentClientSecret, configuration)

Handle the payment result in the completion block and display appropriate messages to your customer based on whether the payment fails with an error or succeeds.

private fun onPaymentSheetResult(paymentResult: PaymentSheetResult) {
        when (paymentResult) {
            is PaymentSheetResult.Completed -> {
                showToast("Payment complete!")
            }
            is PaymentSheetResult.Canceled -> {
                Log.i(TAG, "Payment canceled!")
            }
            is PaymentSheetResult.Failed -> {
                showAlert("Payment failed", paymentResult.error.localizedMessage)
            }
        }
    }

Congratulations! Now that you have integrated the Android SDK, you can customise the payment sheet to blend with the rest of your app.

Next step:

💳Payment methods setup