MoMo Pay Drop-in integration

Add MoMo Pay to an existing iOS Drop-in integration.

Our iOS Drop-in renders MoMo Pay in your payment form, and redirects the shopper to the MoMo Pay app or website where they can complete the payment.

When making an MoMo Pay 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 MoMo Pay 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 MoMo Pay integration:

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

Show MoMo Pay 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 MoMo Pay in your payment form, specify in your /paymentMethods request:

countryCode: VN
amount.currency: VND
amount.value: The value of the payment.

Make a payment

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

Pass data.paymentMethod to your server.

From your server, make a /payments request, specifying:

paymentMethod: The data.paymentMethod from the didSubmit event from your client app.
returnUrl: The URL where the shopper will be redirected back to after completing the payment. Use the custom URL for your app, for example, my-app://. For more information on setting custom URL schemes, refer to the Apple Developer documentation.

curl https://checkout-test.adyen.com/v68/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
  "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
  "reference":"YOUR_ORDER_NUMBER",
  "amount":{
    "currency":"VND",
    "value":1000
  },
  "{hint:data.paymentMethod from didSubmit}paymentMethod{/hint}":{
    "type":"momo_pay"
  },
  "returnUrl":"my-app://"
}'

# 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 => "VND",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "momo_pay"
  },
  :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("VND");
    amount.setValue(15000L);
    paymentsRequest.setAmount(amount);

    DefaultPaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
    paymentMethodDetails.setType("momo_pay");
    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" => "VND",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "momo_pay"
  ),
  "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': 'VND'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'momo_pay'
   },
   '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("VND", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "momo_pay"
};
var paymentsRequest = new 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: "VND", value: 1000 },
    paymentMethod: {
        type: 'momo_pay'
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount,
    returnUrl: "my-app://"
}).then(res => res);

https://docs.adyen.com/payment-methods/momo-pay/ios-drop-in#ios-payments

The /payments response contains an action object with the information needed to redirect the shopper.

{
"resultCode":"RedirectShopper",
"action":{
  "paymentMethodType":"momo_pay",
  "method":"GET",
  "url":"https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=...",
  "type":"redirect"
}
}

https://docs.adyen.com/payment-methods/klarna/ios-drop-in#-payments-response

Pass the action object to your client app.

Handle the redirect result

Drop-in uses dropInComponent.handle(action) to redirect the shopper to MoMo Pay.

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.

From your server, make a POST /payments/details request providing the data from the didProvide method from your client app.

  curl https://checkout-test.adyen.com/v68/payments/details \
  -H "x-API-key: YOUR_X-API-KEY" \
  -H "content-type: application/json" \
  -d '{
       "details": {
         "redirectResult": "eyJ0cmFuc1N0YXR1cyI6IlkifQ=="
     }
  }'

https://docs.adyen.com/payment-methods/klarna/ios-drop-in#-payments-details-request

You receive a response containing:

resultCode: Use this to present the result to your shopper.
pspReference: Our unique identifier for the transaction.
/payments/details response
{ "resultCode": "Authorised", "pspReference": "FJM726V375BV9D82" }
https://docs.adyen.com/payment-methods/klarna/ios-drop-in#-payments-details-response

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 MoMo Pay are:

resultCode	Description	Action to take
Authorised	The payment was successful.	Inform the shopper that the payment has been successful.
Cancelled	The shopper cancelled the payment while on MoMo Pay's website or app.	Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Pending or Received	The shopper has completed the payment but the final result is not yet known.	Inform the shopper that you've received their order, and are waiting for the payment to be completed. To know the final result of the payment, wait for the AUTHORISATION notification webhook.
Refused	The payment was refused by MoMo Wallet.	Ask the shopper to try the payment again using a different payment method.

If the shopper failed to return to your website or app, wait for notification webhooks to know the outcome of the payment. The notification webhooks you can receive for MoMo Pay are:

eventCode	success field	Description	Action to take
AUTHORISATION	false	The transaction failed.	Cancel the order and inform the shopper that the payment failed.
AUTHORISATION	true	The shopper successfully completed the payment.	Inform the shopper that the payment has been successful and proceed with the order.
OFFER_CLOSED	true	The shopper did not complete the payment.	Cancel the order and inform the shopper that the payment timed out.

Recurring payments

MoMo Pay supports recurring transactions. To make recurring transactions, you need to:

Create a shopper token.
Use the token to make future payments for the shopper.

Create a token

To create a token, include in your /payments request:

storePaymentMethod: true
shopperReference: Your unique identifier for the shopper.

When the payment has been settled, you receive a notification webhook containing:

eventCode: RECURRING_CONTRACT
originalReference: The pspReference of the initial payment.
pspReference: This is the token that you need to make recurring payments for this shopper.

Make sure that your server is able to receive RECURRING_CONTRACT as part of your standard notifications. You can enable the RECURRING_CONTRACT event code in the webhook settings page.

Make a payment with a token

To make a payment with the token, include in your /payments request:

paymentMethod.storedPaymentMethodId: The pspReference from the RECURRING_CONTRACT notification.
You can also get this value by using the /listRecurringDetails endpoint.
shopperReference: The unique shopper identifier that you specified when creating the token.
shopperInteraction: ContAuth

recurringProcessingModel: Use Subscription for a series of transactions following a fixed time interval or UnscheduledCardOnFile for contracts with non-fixed time interval.

curl https://checkout-test.adyen.com/v68/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
       "amount":{
          "value":1000,
          "currency":"PHP"
       },
       "paymentMethod":{
          "type":"momo_pay",
          "storedPaymentMethodId":"7219687191761347"
       },
       "reference":"YOUR_ORDER_NUMBER",
       "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
       "shopperReference":"YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j",
       "shopperInteraction":"ContAuth",
       "recurringProcessingModel": "Subscription"
}'

# 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 => "PHP",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "momo_pay",
    :storedPaymentMethodId => "7219687191761347"
  },
  :returnUrl => "https://your-company.com/checkout?shopperOrder=12xy..",
  :shopperReference => "YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j",
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT",
  :shopperInteraction => "ContAuth",
  :recurringProcessingModel => "Subscription"
})

// 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("PHP");
amount.setValue(15000L);
paymentsRequest.setAmount(amount);

DefaultPaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
paymentMethodDetails.setRecurringDetailReference("7219687191761347");
paymentMethodDetails.setType("momo_pay");
paymentsRequest.setPaymentMethod(paymentMethodDetails);

paymentsRequest.setReference("YOUR_ORDER_NUMBER");
paymentsRequest.setReturnUrl("https://your-company.com/checkout?shopperOrder=12xy..");
paymentsRequest.setShopperReference("YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j");
paymentsRequest.setShopperInteraction("ContAuth");
paymentsRequest.setRecurringProcessingModel("Subscription");

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" => "PHP",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "momo_pay",
    "storedPaymentMethodId" => "7219687191761347"
  ),
  "returnUrl" => "https://your-company.com/checkout?shopperOrder=12xy..",
  "shopperReference" => "YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j",
  "recurringProcessingModel" => "Subscription",
  "shopperInteraction" => "ContAuth",
  "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': 'PHP'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'momo_pay',
      'storedPaymentMethodId': '7219687191761347'
   },
   'returnUrl': 'https://your-company.com/checkout?shopperOrder=12xy..',
   'shopperReference': 'YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j'
   'merchantAccount': 'YOUR_MERCHANT_ACCOUNT',
   'shopperInteraction':'ContAuth',
   'recurringProcessingModel': 'Subscription'
})

// 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("PHP", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "momo_pay",
  StoredPaymentMethodId = "7219687191761347"
};
var paymentsRequest = new Model.Checkout.PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  ReturnUrl = @"https://your-company.com/checkout?shopperOrder=12xy..",
  MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
  ShopperReference = "YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j",
  RecurringProcessingModel = "Subscription",
  ShopperInteraction = "ContAuth",
  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: "PHP", value: 1000 },
    paymentMethod: {
        type: 'momo_pay',
        storedPaymentMethodId: "7219687191761347"
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount,
    shopperReference: "YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j",
    returnUrl: "https://your-company.com/checkout?shopperOrder=12xy..",
    shopperInteraction: "ContAuth",
    recurringProcessingModel: "Subscription"
}).then(res => res);

https://docs.adyen.com/payment-methods/momo-pay/ios-drop-in#recurring-momo

Test and go live

To make MoMo Pay payments in the test environment:

Download the MoMo Pay test app for iOS or Android at https://test-payment.momo.vn/download/. If you're testing on a mobile browser, you see a link to download the test app. If you're testing on a desktop browser, use the test app to scan the QR code.
Use MoMo's test credentials to log in to the test app. MoMo Pay provides different credentials depending on the scenario that you want to test (for example, failed scenarios).

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

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