The Antom SDK is a pre-built UI component that simplifies the process of integrating Antom payment services. This component offers a simple and quick way to integrate all payment methods supported by Antom, including credit cards, digital wallets, bank transfers, online banking, and more.

The SDK component can automatically adapt to the buyer's device and location, performing tasks such as information collection, redirection, switching between apps, displaying QR codes, and more based on the characteristics of the payment method. You can easily provide a comprehensive payment solution on your website or application, saving a significant amount of time and resources required to build each payment interface and process.

User experience

The following figures show the user journey of paying on a shopping website or mobile web app:

Web

WAP

Payment flow

For each payment method, the payment flow is composed of the following steps:

1. The buyer lands on the checkout page.
2. Your server creates a payment session based on the payment method, amount, currency, and goods.
3. Your client creates and invokes the component with the payment session.
4. The component collects payment elements, displays code information, redirects, and guides the buyer to complete the payment based on the payment method's characteristics.
5. Your server receives payment result notifications.

Quick start

Start your integration by taking the following steps:

Step 1: Create a payment session Server-side

When a buyer selects a payment method provided by Antom, you need to collect key information such as the payment request ID, order amount, payment method, order description, payment redirect URL, and payment result notification URL, call the createPaymentSession API to create a payment session, and return the payment session to the client.

Antom provides server-side API libraries for multiple languages. The following codes use Java as an example. You need to install Java 6 or higher.

Install an API library

You can find the latest version on GitHub.

<dependency>
<groupId>com.alipay.global.sdk</groupId>
<artifactId>global-open-sdk-java</artifactId>
<version>2.0.21</version>
</dependency>

Initialize request instance

Create a singleton resource to make a request to Antom.

import com.alipay.global.api.AlipayClient;
import com.alipay.global.api.DefaultAlipayClient;

String merchantPrivateKey = "YOUR PRIVATE KEY";
String alipayPublicKey = "ALIPAY PUBLIC KEY"
AlipayClient defaultAlipayClient = new DefaultAlipayClient(EndPointConstants.SG,
                                                           merchantPrivateKey, alipayPublicKey);

Create a payment session

Creating a payment session includes the following parameters:

The above parameters are the basic parameters for creating a payment session, for full parameters and additional requirements for certain payment methods please refer to createPaymentSession (Checkout Payment).

The following sample code shows how to call the createPaymentSession API:

AlipayPaymentSessionRequest alipayPaymentSessionRequest = new AlipayPaymentSessionRequest();
alipayPaymentSessionRequest.setClientId(CLIENT_ID);
alipayPaymentSessionRequest.setPath("/ams/sandbox/api/v1/payments/createPaymentSession");
alipayPaymentSessionRequest.setProductCode(ProductCodeType.CASHIER_PAYMENT);

// replace to your paymentRequestId
alipayPaymentSessionRequest.setPaymentRequestId("paymentRequestId01");
// set amount
Amount amount = new Amount();
amount.setCurrency("MYR");
amount.setValue("4200");
alipayPaymentSessionRequest.setPaymentAmount(amount);

// set paymentMethod
PaymentMethod paymentMethod = new PaymentMethod();
paymentMethod.setPaymentMethodType("ONLINEBANKING_FPX");
alipayPaymentSessionRequest.setPaymentMethod(paymentMethod);

// set order Info
Order order = new Order();
order.setReferenceOrderId("referenceOrderId01");
order.setOrderDescription("antom sdk test order");
order.setOrderAmount(amount);
Buyer buyer = new Buyer();
buyer.setReferenceBuyerId("yourBuyerId");
order.setBuyer(buyer);
order.setOrderAmount(amount);
alipayPaymentSessionRequest.setOrder(order);

// replace to your redirect url
alipayPaymentSessionRequest.setPaymentRedirectUrl("https://www.yourMerchantWeb.com");
alipayPaymentSessionRequest.setPaymentNotifyUrl("https://www.yourNotifyUrl");

AlipayPaymentSessionResponse alipayPaymentSessionResponse = null;
try {
    alipayPaymentSessionResponse = defaultAlipayClient.execute(alipayPaymentSessionRequest);
} catch (AlipayApiException e) {
    String errorMsg = e.getMessage();
    // handle error condition
}

The following code shows a sample of the request message:

{
  "paymentNotifyUrl": "https://www.yourNotifyUrl",
  "paymentRequestId": "paymentRequestId01",
  "paymentAmount": {
    "currency": "MYR",
    "value": "4200"
  },
  "productCode": "CASHIER_PAYMENT",
  "paymentRedirectUrl": "https://www.yourMerchantWeb.com",
  "paymentMethod": {
    "paymentMethodType": "ONLINEBANKING_FPX"
  },
  "order": {
    "orderAmount": {
      "currency": "MYR",
      "value": "4200"
    },
    "referenceOrderId": "referenceOrderId01",
    "orderDescription": "antom sdk test order",
    "buyer": {
      "referenceBuyerId": "yourBuyerId"
    }
  }
}

The following code shows a sample of the response, which contains the following parameters:

• paymentSessionData: the payment session to be returned to the frontend
• paymentSessionExpiryTime: the expiration time of the payment session.

{
  "paymentSessionData": "UNvjVWnWPXJA4BgW+vfjsQj7PbOraafHY19X+6EqMz6Kvvmsdk+akdLvoShW5avHX8e8J15P8uNVEf/PcCMyXg==&&SG&&111",
  "paymentSessionExpiryTime": "2023-04-06T03:28:49Z",
  "paymentSessionId": "UNvjVWnWPXJA4BgW+vfjsQj7PbOraafHY19X+6EqMz6Ikyj9FPVUOpv+DjiIZqMe",
  "result": {
    "resultCode": "SUCCESS",
    "resultMessage": "success.",
    "resultStatus": "S"
  }
}

FAQs

Can Chinese characters be used in the request?

 Do not use Chinese characters for the fields in the request including paymentRequestId, referenceOrderId, orderDescription, and goods to avoid incompatible payment methods, such as QRIS and Mastercard.

How to set the payment result notification address?

Antom will send the payment result through the notifyPayment, which you can specify in the createPaymentSession API via the paymentNotifyUrl parameter. If the address of each payment is the same, you can also configure it in the Antom Dashboard. If you have configured the address and set the parameter in the API, Antom will use the address set in the API.

Step 2: Create and invoke the SDK Client-side

The Antom SDK is a component used for handling payment processes. You initiate the SDK by creating a payment session to collect information, switch between apps, and display QR codes based on the payment method specified in createPaymentSession API.

After the buyer selects a payment method on the page, you need to create the SDK and initiate it with a payment session.

Install

Before beginning the integration, make sure that you have completed the following environment preparations:

• Properly handle compatibility issues: Provide corresponding polyfills for Internet Explorer and other old browser versions. We recommend that you use babel-preset-env to address browser compatibility issues when you build a project.
• Use the following recommended browser versions:

• For mobile browsers:

• iOS 11 and later.
• Android 5.0 and later.

• For computer browsers, use the following recommended versions:

You can integrate the SDK resource package via CDN or npm.

<script src="https://sdk.marmot-cloud.com/package/ams-checkout/1.10.1/dist/umd/ams-checkout.min.js"></script>

npm install @alipay/ams-checkout

Instantiate the SDK

Create the SDK instance by using the AMSCashierPayment and specify basic configurations. Configuration objects includes the following parameters:

The following sample code shows how to obtain the browser language:

let language = navigator.language || navigator.userLanguage;
language = language.replace("-", "_"); // Replace "-" with "_"

The following sample code shows how to instantiate the SDK:

const checkoutApp = new window.AMSCashierPayment({
  environment: "sandbox",
  locale: "en_US",
  onLog: ({code, message}) => {},
  onEventCallback: ({code, message}) => {},
});

//Request the server to get paymentSessionData

Invoke the SDK

Use the createComponent function in the instance object to create a payment component:

The following sample code shows how to call createComponent:

async function create(sessionData) {
  await checkoutApp.createComponent({ 
    sessionData: sessionData, 
    appearance:{
      showLoading: true, // Set as true by default to enable the default loading pattern
    }
  });
}

Call the unmount method to free SDK component resources in the following situations:

• When the buyer switches views to exit the checkout page, free the component resources created in the createPaymentSession.
• When the buyer initiates multiple payments, free the component resources created in the previous createPaymentSession.
• When the buyer completes the payment and sets notRedirectAfterComplete to true, free the component resources after obtaining specific payment result codes.

// Free SDK component resources
checkoutApp.unmount();

FAQs

What can I do when I receive the SDK_CREATEPAYMENT_PARAMETER_ERROR?

When you receive this event code, please check if the sessionData passed in is correct and complete.

What can I do when I receive the SDK_PAYMENT_ERROR or Rendering View Error?

When you receive this event code, please check the network request. There may be an exception in the initialization interface, and you need to make sure that the environment of the payment session creation request is consistent with the environment parameters of the instantiated SDK. Check whether the payment session creation parameters are passed correctly. If the interface exception still exists, you can contact us for troubleshooting.

Display payment results

You can use the payment component to handle payment methods which require a redirect (asynchronous payments), and those that do not (synchronous payments).

Redirect payment

The payment process of some payment methods needs to leave the original web page and jump to the organization's page to complete the payment, such as the payment method of online banking. In this case, the buyer is redirected to the paymentRedirectUrl that you provided in createPaymentSession API after completing the payment. You can obtain the payment result by active query and and show it to the buyer in that URL.

Non-redirect payment

For payment without redirection, the payment result will be given through the onEventCallback function. The payment result here is only for front-end display, and the final order status is subject to the server side.

You need to customize the processing flow you want for each payment result through the data in the result of onEventCallback.

The following are the possible event codes of the payment result returned by onEventCallback.

The following sample code shows how to process the onEventCallback:

function onEventCallback({ code, result }) {
  switch (code) {
    case 'SDK_PAYMENT_SUCCESSFUL':
      // Payment was successful. Redirect buyers to the payment result page.
      break;
    case 'SDK_PAYMENT_PROCESSING':
      console.log('Check the payment result data', result);
      // Payment was being processed. Guide buyers to retry the payment based on the provided information.
      break;
    case 'SDK_PAYMENT_FAIL':
      console.log('Check the payment result data', result);
      // Payment failed. Guide buyers to retry the payment based on the provided information.
      break;
    case 'SDK_PAYMENT_CANCEL':
      // Guide buyers to retry the payment.
      break;
    case 'SDK_PAYMENT_ERROR':
      console.log('Check the payment result data', result);
      // The payment status was abnormal. Guide buyers to retry the payment based on the provided information.
      break;
    default:
      break;
  }
}

Step 3: Obtain payment result Server-side

After the buyer completes the payment or the payment times out, Antom sends the corresponding payment results to you through server interactions, you can obtain the payment result by one of the following methods:

• Receive the asynchronous notification
• Inquire about the result

Receive the asynchronous notification

When the payment reaches a final status of success or failure, Antom sends an asynchronous notification to the paymentNotifyUrl specified in the createPaymentSession API through the notifyPayment API. When you receive the notification from Antom, you are required to return a response as instructed in Requirements.

Antom allows you to specify the URL in the paymentNotifyUrl parameter within the createPaymentSession API. If the URL for each payment is the same, you can also configure it in the Antom Dashboard.

The following code shows a sample of the notification request:

{
  "notifyType": "PAYMENT_RESULT",
  "result": {
    "resultCode": "SUCCESS",
    "resultStatus": "S",
    "resultMessage": "success"
  },
  "paymentRequestId": "paymentRequestId01",
  "paymentId": "2020010123456789XXXX",
  "paymentAmount": {
    "value": "4200",
    "currency": "MYR"
  },
  "paymentCreateTime": "2020-01-01T12:01:00+08:30",
  "paymentTime": "2020-01-01T12:01:01+08:30"
}

The following sample code shows how to verify the signature of the notification and make a response to the notification:

@RequestMapping(path = "/payResult", method = RequestMethod.POST)
public ResponseEntity<AlipayResponse> paymentNotifyProcessor(HttpServletRequest request,
@RequestBody String body) {

  // retrieve the required parameters from the request header.
  String requestTime = request.getHeader("request-time");
  String clientId = request.getHeader("client-id");
  String rawSignature = request.getHeader("signature");
  String signature = "";

  // get valid part from raw signature
  if(rawSignature==null||rawSignature.isEmpty()){
  throw new RuntimeException("empty notify signature");
}else {
  String[] parts = rawSignature.split("signature=");
  if (parts.length > 1) {
  signature = parts[1];
}
}

// verify payment result notify's signature
boolean verifyResult = SignatureTool.verify(request.getMethod(), request.getRequestURI(),
clientId, requestTime, body, signature,
ALIPAY_PUBLIC_KEY);
if (!verifyResult) {
  throw new RuntimeException("Invalid notify signature");
}

// update the record status with notify result

// respond the server that we accept the notify
Result result = new Result("SUCCESS", "success", ResultStatusType.S);
AlipayResponse response = new AlipayResponse();
response.setResult(result);
                                                                 return ResponseEntity.ok().body(response);
                                                               }

FAQs

When will the notification be sent?

After the payment is completed, Antom will send asynchronous notification to you within 3~5s, some payment methods such as offline stores take a little longer;

If the payment is not completed, Antom will send asynchronous notification only after the order is closed, the time to close the order is different for different payment methods, generally the default is 14min, you can refer to the list of payment methods for special payment methods.

If the buyer does not submit the payment, in the scenario that the Component needs to collect the payment information (such as card information), if you do not enter any information and directly turn off the component, the notification will not be sent.

Will the asynchronous notification be re-sent?

If you receive an asynchronous notification from Antom, you are required to return the response in the Sample code format. If you do not respond to the asynchronous notification as required, or the asynchronous notification is not delivered due to network reasons, the notification will be automatically resent within 24 hours. The notification can be resent up to 8 times or until a correct response is received to terminate delivery. The sending intervals are as follows: 0 minutes, 2 minutes, 10 minutes, 10 minutes, 1 hour, 2 hours, 6 hours, and 15 hours.

Do I need to add a digital signature to the response?

If you receive an asynchronous notification from Antom, you are required to return the response in the Sample code format, but you do not need to add a digital signature to your response.

How do I understand the meaning of the following key fields?

• result: the payment result of the order.
• paymentRequestId: the payment request ID generated by the merchant used for querying, canceling, and reconciliation.
• paymentId: the payment order ID generated by Antom used for refund and reconciliation.
• paymentAmount: if there is a need for amount reconciliation, you can consume this field.

Inquire about the result

You can call the inquiryPayment API to initiate a query on the result of an order.

The parameter is not a full set of parameters, please refer to the inquiryPayment API for full set of parameters and additional requirements for certain payment methods.

The following sample code shows how to call the inquiryPayment API:

AlipayClient defaultAlipayClient = new DefaultAlipayClient(EndPointConstants.SG,
                                                           merchantPrivateKey, alipayPublicKey);

AlipayPayQueryRequest alipayPayQueryRequest = new AlipayPayQueryRequest();
alipayPayQueryRequest.setClientId(CLIENT_ID);
alipayPayQueryRequest.setPath("/ams/sandbox/api/v1/payments/inquiryPayment");

alipayPayQueryRequest.setPaymentRequstId("paymentRequestId01");
AlipayPayQueryResponse alipayPayQueryResponse;
try {
  alipayPayQueryResponse = defaultAlipayClient.execute(alipayPayQueryRequest);
} catch (AlipayApiException e) {
  String errorMsg = e.getMessage();
  // handle error condition
}

The following code shows a sample of the request message:

{
  "paymentRequestId": "paymentRequestId01"
}

The following code shows a sample of the response message:

{
  "result": {
    "resultCode": "SUCCESS",
    "resultStatus": "S",
    "resultMessage": "Success"
  },
  "paymentStatus": "SUCCESS",
  "paymentRequestId": "paymentRequestId01",
  "paymentId": "2019060811401080010018882020035XXXX",
  "paymentAmount": {
    "value": "500",
    "currency": "USD"
  },
  "paymentCreateTime": "2019-06-01T12:01:01+08:30",
  "paymentTime": "2019-06-01T12:01:01+08:30",
  "transactions": null
}

FAQs

How do I understand the meaning of the following key fields?

• result: the result of the API call. It only indicates the result of the inquiryPayment API call. The order result should be determined based on the paymentStatus. SUCCESS and FAIL indicate final results, while PROCESSING indicates that the transaction is still in progress.
• paymentAmount: amount verification. If there is a need for amount verification, this field can be used.

How frequently should I initiate the query?

It is recommended to initiate a round-robin query at an interval of 2 seconds until either the final payment result is retrieved or an asynchronous payment notification is received.

Sample codes

Full sample codes for front-end:

// Step 1: Instantiate the SDK and handle the callback event.
const onEventCallback = function({ code, result }) {
  switch (code) {
    case 'SDK_PAYMENT_SUCCESSFUL':
      // Payment was successful. Redirect buyers to the payment result page.
      break;
    case 'SDK_PAYMENT_PROCESSING':
      console.log('Check the payment result data', result);
      // Payment was being processed. Guide buyers to retry the payment based on the provided information.
      break;
    case 'SDK_PAYMENT_FAIL':
      console.log('Check the payment result data', result);
      // Payment failed. Guide buyers to retry the payment based on the provided information.
      break;
    case 'SDK_PAYMENT_CANCEL':
      // Guide buyers to retry the payment.
      break;
    case 'SDK_PAYMENT_ERROR':
      console.log('Check the payment result data', result);
      // The payment status was abnormal. Guide buyers to retry the payment based on the provided information.
      break;
    default:
      break;
  }
}
const checkoutApp = new window.AMSCashierPayment({
  environment: "sandbox",
  locale: "en_US",
  onLog: ({code, message}) => {},
  onEventCallback: onEventCallback,
});
// Handle payment button events.
document
  .querySelector("#your form id")
  .addEventListener("submit", handleSubmit);

async function handleSubmit() {
  // Step 2: The server calls createPaymentSession API to obtain paymentSessionData.
  async function getPaymentSessionData() {
    const url = "Fill in the server address";
    const config = {
      // Fill in the request configuration.
    };
    const response = await fetch(url, config);
    // Obtain the value of the paymentSessionData parameter in the response.
    const { paymentSessionData } = await response.json();
    return paymentSessionData;
  }
  const paymentSessionData = await getPaymentSessionData();

  // Step 3: Create rendering components.
  await checkoutApp.createComponent({ 
    sessionData: paymentSessionData, 
    appearance:{
      showLoading: true, // Set as true by default to enable the default loading pattern.
    }, 
  });
}

Event codes

The SDK provides the following status codes:

• SDK_START_OF_LOADING: The loading animation starts to play during the payment component creation.
  
• SDK_END_OF_LOADING: The loading animation ends during the payment component creation.
  

The SDK provides the following error codes:

• SDK_INTERNAL_ERROR: The internal error of the SDK occurs. Contact Alipay Technical Support to resolve the issue.
  
• SDK_CREATEPAYMENT_PARAMETER_ERROR: The parameters passed into the AMSCashierPayment method are incorrect. Ensure the parameters are passed correctly and send a new request.
  
• SDK_INIT_PARAMETER_ERROR: The parameters passed into the createComponent method are incorrect. Ensure the parameters are passed correctly and send a new request.
  
• SDK_CREATECOMPONENT_ERROR: An exception occurs when calling the createComponent method. Contact Alipay Technical Support to resolve the issue.
  
• SDK_CALL_URL_ERROR: The payment method client failed to be revoked. Contact Alipay Technical Support to resolve the issue.