GrabPay Drop-in integration

Our iOS Drop-in renders GrabPay in your payment form, and redirects the shopper to GrabPay to complete the payment.

When making a GrabPay payment, you additionally need to:

• Handle the redirect result after the shopper returns to your website.

Before you begin

This page explains how to add GrabPay to your existing iOS Drop-in integration. The iOS Drop-in integration works the same way for all payment methods. If you haven't done this integration yet, refer to our Drop-in integration guide.

Before starting your GrabPay integration:

1. Make sure that you have set up your back end implementation, and added Drop-in to your payment form.
2. Add GrabPay in your test Customer Area.

Show GrabPay in your payment form

Drop-in uses the countryCode and the amount.currency from your /paymentMethods request to show the available payment methods to your shopper.

To show GrabPay in your payment form, specify in your /paymentMethods request:

After the shopper selects GrabPay, Drop-in invokes the didSubmit method which contains data.paymentMethod.

Make a payment

When the shopper proceeds to pay, Drop-in invokes the didSubmit method which contains data.paymentMethod.

1. Pass data.paymentMethod to your server.
2. From your server, make a /payments, specifying:
   • paymentMethod: The state.data.paymentMethod from the didSubmit event from your front end.
   • reference: Your unique reference for this payment.
   • amount: The amount that the shopper needs to pay.
   • returnUrl: The URL the shopper will be redirected back to after they complete the payment.

curl https://checkout-test.adyen.com/v66/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
     "amount": {
       "currency": "SGD",
       "value": 1000
     },
     "reference": "YOUR_ORDER_NUMBER",
     "paymentMethod": {
       "type": "grabpay_SG"
     },
     "returnUrl": "my-app://",
     "merchantAccount": "YOUR_MERCHANT_ACCOUNT"
}'

# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen::Client.new
adyen.api_key = "YOUR_X-API-KEY"
 
response = adyen.checkout.payments({
  :amount => {
    :currency => "SGD",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "grabpay_SG"
  },
  :returnUrl => "my-app://",
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT"
})

// Set YOUR_X-API-KEY with the API key from the Customer Area.
// Change to Environment.LIVE and add the Live URL prefix when you're ready to accept live payments.
    Client client = new Client("YOUR_X-API-KEY", Environment.TEST);
    Checkout checkout = new Checkout(client);

    PaymentsRequest paymentsRequest = new PaymentsRequest();

    String merchantAccount = "YOUR_MERCHANT_ACCOUNT";
    paymentsRequest.setMerchantAccount(merchantAccount);

    Amount amount = new Amount();
    amount.setCurrency("SGD");
    amount.setValue(15000L);
    paymentsRequest.setAmount(amount);

    DefaultPaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
    paymentMethodDetails.setType("grabpay_SG");
    paymentsRequest.setPaymentMethod(paymentMethodDetails);

    paymentsRequest.setReference("YOUR_ORDER_NUMBER");
    paymentsRequest.setReturnUrl("my-app://");

    PaymentsResponse paymentsResponse = checkout.payments(paymentsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
$client = new \Adyen\Client();
$client->setXApiKey("YOUR_X-API-KEY");
$service = new \Adyen\Service\Checkout($client);

$params = array(
  "amount" => array(
    "currency" => "SGD",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "grabpay_SG"
  ),
  "returnUrl" => "my-app://",
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT"
);
$result = $service->payments($params);

#Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen.Adyen()
adyen.client.xapikey = 'YOUR_X-API-KEY'

result = adyen.checkout.payments({
   'amount': {
      'value': 1000,
      'currency': 'SGD'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'grabpay_SG'
   },
   'returnUrl': 'my-app://',
   'merchantAccount': 'YOUR_MERCHANT_ACCOUNT'
})

// Set your X-API-KEY with the API key from the Customer Area.
var client = new Client ("YOUR_X-API-KEY", Environment.Test);
var checkout = new Checkout(client);

var amount = new Model.Checkout.Amount("SGD", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "grabpay_SG"
};
var paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  ReturnUrl = @"my-app://",
  MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
  PaymentMethod = details
};

var paymentResponse = checkout.Payments(paymentsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
const {Client, Config, CheckoutAPI} = require('@adyen/api-library');
const config = new Config();
// Set your X-API-KEY with the API key from the Customer Area.
config.apiKey = '[API_KEY]';
config.merchantAccount = '[YOUR_MERCHANT_ACCOUNT]';
const client = new Client({ config });
client.setEnvironment("TEST");
const checkout = new CheckoutAPI(client);
checkout.payments({
    amount: { currency: "SGD", value: 1000 },
    paymentMethod: {
        type: 'grabpay_SG'
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount,
    returnUrl: "my-app://"
}).then(res => res);

The /payments response contains:

• action.method: GET. The HTTP request method that you should use. After the shopper completes the payment, they will be redirected back to your returnURL using the same method.

{
   "resultCode":"RedirectShopper",
   "action":{
      "method":"GET",
      "paymentData":"Ab02b4c0!BQABAgCSZT7t...",
      "paymentMethodType":"grabpay_SG",
      "type":"redirect",
      "url":"https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=..."
   },
   "details":[
      {
        "key":"redirectResult",
        "type":"text"
      }
   ],
   ...
}

3. Pass the action object to your client app. Drop-in needs this to redirect the shopper to GrabPay.

Handle the redirect result

Drop-in redirects the shopper to GrabPay where they complete the payment.  

1. To inform Drop-in when the shopper returns to your app, implement the following in your UIApplicationDelegate:

   func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey: Any] = [:]) -> Bool {
      RedirectComponent.applicationDidOpen(from: url)
   
      return true
   }

   After Drop-in completes the action, it invokes the didProvide method.
2. From your server, make a POST /payments/details request providing the data from the didProvide method from your client app.
   https://docs.adyen.com/pt/pt/payment-methods/afterpaytouch/ios-drop-in#-payments-details-request

   /payments/details request

   {
      "{hint:data.paymentData from didProvide}paymentData{/hint}":"Ab02b4c0!BQABAgCJN1wRZuGJmq8dMncmypvknj9s7l5Tj...",
      "{hint:data.details from didProvide}details{/hint}":{
        "redirectResult":"X6XtfGC3!Y..."
      }
   }

   You receive a response containing:
   • resultCode: Use this to present the result to your shopper.
   • pspReference: Our unique identifier for the transaction.
   https://docs.adyen.com/pt/pt/payment-methods/afterpaytouch/ios-drop-in#-payments-details-response

   /payments/details response

   {
      "resultCode": "Authorised",
      "pspReference": "88154795347618C"
   }

Present the payment result

Use the resultCode that you received in the /payments/details response to present the payment result to your shopper.

The resultCode values you can receive for GrabPay are:

If the shopper closed the browser and failed to return to your website, wait for notification webhooks to know the outcome of the payment. The notification webhooks you can receive for are:

Recurring payments

To make recurring GrabPay payments:

1. In your initial payment request, create a shopper token specifying:
   • storePaymentMethod: true
   • shopperReference: Your unique identifier for the shopper (minimum length three characters).
   • shopperInteraction: Ecommerce
2. When you make a /payments/details request after the shopper is redirected back to your website or app, save the recurringDetailReference that you receive in the additionalData of the response. This is your token.
3. Make subsequent recurring transactions specifying a paymentMethod with:
   • type: The GrabPay type, for example grabpay_SG.
   • recurringDetailReference: The token you received in the /payments/details response.

Refer to Tokenization for more information and detailed instructions.

Test and go live

To test your GrabPay integration:

1. Contact our Support Team to register for a GrabPay test wallet. You'll need to fill out a form and provide a phone number (local or international) and an email address. Note that the wallet will have a balance limit depending on the wallet regulations in each market.
2. In the simulator, log in to Grab with the phone number you registered, and specify the one-time password you receive on that phone number.

Check the status of the GrabPay test payments in your Customer Area > Transactions > Payments.

Before you can accept live GrabPay payments, you need to submit a request for GrabPay in your live Customer Area.

See also