In Person Payments

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Example Use cases

These APIs are designed to enable a variety of use cases where in-person payments are necessary. Here are a few examples of how this API can be used:

• Self Server Kiosk
• Point of Sale
• Vending Machines
  These APIs are only available in countires that support the wifi card reader

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Overview

1. Your client device (e.g., POS, Kiosk) sends a request to your backend server to initiate the payment process.
2. Your backend server calls the Payment Request API with the payment method set as “wifi_card_reader”.
3. HitPay initiates the payment process on the card reader that is already connected to the wifi.
4. Your customer presents their card to the card reader and completes the payment process.
5. HitPay sends a webhook to your backend server with the payment status information.
6. Your backend server receives the webhook and updates the order status accordingly.

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Setup Your Reader

Before you can use the In-Person Payments using Payment Requests API, you’ll need to order a card reader and complete the setup process. Here’s what you need to do:

1. Order a card reader from your hitpay dashboard : Guide
2. Register the reader: Guide

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Displaying Payments on the Terminal

After switching your terminal to Standalone mode:

1. On the login screen, tap the button on the top left corner.
2. Select In-Person Payment API from the menu.
3. The terminal will now display the In-Person Payment API screen, allowing you to accept card and QR payments.

When in this mode:

• The display will show the HitPay logo.
• If a QR payment method is selected, the relevant QR code will be displayed for the customer to scan.
• If a card payment method is selected, the display will show instructions to tap, insert, or swipe the card.

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Payment Methods

The in-person payment API supports two main payment methods:

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1. Card Payments

Accept physical card payments (credit/debit cards) using the card reader.

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2. QR Payments

Accept QR code payments where customers scan the QR code displayed on the card reader screen.

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Create a Payment Request APIs

Once you have all the details from the client and are ready to collect payments, use this API to create a payment request.

Endpoint

POST https://api.sandbox.hit-pay.com/v1/payment-requests

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Query Parameters

Mandatory fields are amount and currency

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Initiating Card Payments

To initiate a card payment, follow these steps:

1. Create Payment Request: Use the Payment Request API with payment_methods[] set to wifi_card_reader
2. Card Reader Activation: The card reader will automatically activate and display “Ready for Payment”
3. Customer Interaction: Ask your customer to insert, tap, or swipe their card on the reader
4. Payment Processing: The card reader will process the payment and display the result
5. Webhook Notification: You’ll receive a webhook with the payment status

$client = new http\Client;
$request = new http\Client\Request;
$request->setRequestUrl('https://api.sandbox.hit-pay.com/v1/payment-requests');
$request->setRequestMethod('POST');
$body = new http\Message\Body;
$body->append(new http\QueryString(array(
  'amount' => '599',
  'currency' => 'SGD',
  'payment_methods[]' => 'wifi_card_reader',
  'webhook' => 'https://test.com/webhook',
  'wifi_terminal_id' => 'tmr_123123123')));$request->setBody($body);
$request->setOptions(array());
$request->setHeaders(array(
  'X-BUSINESS-API-KEY' => 'meowmeowmeow',
  'Content-Type' => 'application/x-www-form-urlencoded',
  'X-Requested-With' => 'XMLHttpRequest'
));
$client->enqueue($request)->send();
$response = $client->getResponse();
echo $response->getBody();

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Initiating QR Payments

To initiate a QR payment, follow these steps:

1. Create Payment Request: Use the Payment Request API with payment_methods[] set to any supported QR payment method and generate_qr set to true
2. QR Code Display: The card reader will automatically display a QR code on its screen
3. Customer Scanning: Ask your customer to scan the QR code using their mobile payment app (e.g., PayNow, GrabPay, etc.)
4. Payment Processing: The customer completes the payment through their mobile app
5. Webhook Notification: You’ll receive a webhook with the payment status

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Supported QR Payment Methods

For QR payments, you need to use one of the supported QR payment methods. See the complete list of supported QR payment methods.

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Required Parameters for QR Payments

$client = new http\Client;
$request = new http\Client\Request;
$request->setRequestUrl('https://api.sandbox.hit-pay.com/v1/payment-requests');
$request->setRequestMethod('POST');
$body = new http\Message\Body;
$body->append(new http\QueryString(array(
  'amount' => '599',
  'currency' => 'SGD',
  'payment_methods[]' => 'paynow_online',
  'generate_qr' => 'true',
  'webhook' => 'https://test.com/webhook',
  'wifi_terminal_id' => 'tmr_123123123')));$request->setBody($body);
$request->setOptions(array());
$request->setHeaders(array(
  'X-BUSINESS-API-KEY' => 'meowmeowmeow',
  'Content-Type' => 'application/x-www-form-urlencoded',
  'X-Requested-With' => 'XMLHttpRequest'
));
$client->enqueue($request)->send();
$response = $client->getResponse();
echo $response->getBody();

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Response

The response will include a qr_code_data object, which contains the data to be converted into a scannable QR code (qr_code).

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Handling the webhook

• Create an endpoint (E.g. /payment-confirmation/webhook) in your server that accepts POST requests. This request is application/x-www-form-urlencoded.
• Validate the webhook data using your salt value
• Return HTTP status code 200 to Hitpay
• Mark your order as paid
• Sample webhook payload data

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Sample Webhook Payload

payment_id=92965a2d-ece3-4ace-1245-494050c9a3c1&payment_request_id=92965a20-dae5-4d89-a452-5fdfa382dbe1&reference_number=ABC123&phone=&amount=599.00&currency=SGD&status=completed&hmac=330c34a6a8fb9ddb75833620dedb94bf4d4c2e51399d346cbc2b08c381a1399c

Webhook fields

Following fields are sent with the webhook request:

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Validating a Webhook

To validate a webhook payload from HitPay, follow these steps:

1. Payload Extraction: Extract the key-value pairs from the webhook payload. For example:

payment_id=92965a2d-ece3-4ace-1245-494050c9a3c1&payment_request_id=92965a20-dae5-4d89-a452-5fdfa382dbe1&reference_number=ABC123&phone=&amount=599.00&currency=SGD&status=completed&hmac=330c34a6a8fb9ddb75833620dedb94bf4d4c2e51399d346cbc2b08c381a1399c

2. Exclude HMAC and Values: Remove the "hmac" key and its corresponding value from the extracted payload. For example:

3. Concatenation and Sorting: Concatenate the keys and values from the remaining key-value pairs without using "&" and "=", and arrange them in alphabetical order of the keys. For example:

amount1.00currencySGDpayment_id91d94138-b0b5-4ba0-b78c-babc59776876payment_request_id91d94124-0d1c-4fb4-921e-51953793106cphonereference_number201000000Dstatuscompleted

4. Signature Generation: Use the HMAC-SHA256 algorithm along with the secret salt from your dashboard to generate a signature for the concatenated string. This signature will be unique to this payload.

5. Comparison and Validation: Compare the generated signature with the HMAC value present in the original payload, both values must match.

By following these steps, you can ensure the authenticity and integrity of the webhook payload received from HitPay. This process guarantees that the payload can be trusted and processed securely.

Sample Code

function generateSignatureArray($secret, array $args) {   
  $hmacSource = [];        
  foreach ($args as $key => $val) {
    $hmacSource[$key] = "{$key}{$val}";
  }
  ksort($hmacSource);
  $sig            = implode("", array_values($hmacSource));
  $calculatedHmac = hash_hmac('sha256', $sig, $secret); 

  return $calculatedHmac;
}

Congrats! You have now successfully completed the in-person payment integration.

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FAQs