Opening Payment Page as a separate HTML page

When opened as a separate HTML page, the Payment Page payment form is displayed to the customer in a separate browser tab. Depending on the browser operation setup, it can be an active tab, in which the web service page was opened, or a new tab—but in either case, the customer's interaction with the web service is interrupted and the customer is redirected to a different page, which focuses their attention on the purchase. After the purchase, the customer can be redirected back to the web service (details).

For opening the payment form as a separate page, the following should be performed on the web service side:

1. Define the events upon which the payment form should open (for example, the purchase button click).
2. Set up the payment form to open upon the required events by using your in-house solutions or the JavaScript library from ecommpay available at https://paymentpage.ecommpay.com/shared/merchant.js. Among other capabilities, this library allows you to automatically use a certain option of Payment Page opening depending on a device. It means the form can be set to open as a separate page on mobile devices and in a modal window or in an iframe element on other devices.

To open the payment form as a separate HTML page, redirect your customer to a URL of the following format:

To open the payment form as a separate HTML page, redirect your customer to a URL of a specific format. The URL should contain a data string (<parameters>) with the names and values of the parameters in pairs (including the signature) delimited by the ampersand character (&).

https://paymentpage.ecommpay.com/payment?<parameters>

In this URL, <parameters> is a data string with the names and values of the parameters in pairs (including the signature) delimited by the ampersand character (&). The information about the parameters and signature generation is provided in the following articles: Parameters for opening the payment form and Signature generation and verification.

https://paymentpage.ecommpay.com/payment?project_id=42&customer_id=123&payment_id=4438&payment_amount=1000&payment_currency=EUR&signature=AE5hmtzdP0Dt7qGTg...

While the JavaScript library provided by ecommpay is primarily intended to simplify opening of the payment form in a modal window and in an iframe element, it can also be used for opening the form as a separate HTML page. For example, you can set the form to open as a separate page on mobile devices and in a modal window on other devices.

To open Payment Page as a separate page using the JavaScript library merchant.js from ecommpay, link the library on the client side of the web service and use the corresponding calls to the EPayWidget object. Beside that, if you plan to use the JavaScript library for other options for the Payment Page opening, you should also link the CSS library available at https://paymentpage.ecommpay.com/shared/merchant.css.

In the calls to the EPayWidget object, the configObj object must contain one of the following parameters:

• redirect_on_mobile with the value true—for opening the payment form as a separate HTML page on mobile devices only;
• redirect with the value true—for opening the payment form as a separate HTML page on all devices.

If these parameters are not specified or not applicable for the device in use, the payment form opens either in a modal window or in an iframe element (if this has been specified via the corresponding parameter target_element).

Apart from these aspects, the calls to the EPayWidget object for opening the form in a separate tab must be made according to the following general conditions that are also relevant for other options to open the payment form:

To open Payment Page as a separate HTML page using the JavaScript library merchant.js from ecommpay, link this library and use the corresponding calls to the EPayWidget object. These calls, among other parameters for opening the form in the configObj object, must contain one of the following parameters:

• redirect with the value true—for opening the payment form in a separate tab on all devices;
• redirect_on_mobile with the value true—for opening the payment form in a separate tab on mobile devices only.

Apart from this, the calls to the EPayWidget object should correspond to the following general conditions:

1. Each call can be made via one of the two methods:
   • bind (EPayWidget.bind)—if the payment form should be opened with a button click (with the button identifier <pay_button_id> specified).
   • run (EPayWidget.run)—if the payment form should be opened upon any other event in the user interface.
2. Each call must contain the JavaScript object configObj with the parameters of the payment form opening and the signature for these parameters. with the parameters of the payment form opening and the signature for these parameters.

   The information about the parameters used and signature generation is provided in the following articles: Parameters for opening the payment form and Signature generation and verification.

3. If necessary, any call can also contain an HTTP request method (method)—POST or GET. If nothing is specified, the GET method is used by default.
4. Additionally, any call can contain functions for handling the information about the customer's actions (details).

   The information about such handler functions is provided in the article Handling customer behaviour events on Payment Page.

EPayWidget.bind('<pay_button_id>', configObj, method);

EPayWidget.run(configObj, method);

EPayWidget.bind('pay_button_id', // Button identifier
    { project_id: 42, // Project identifier
      customer_id: '17008', // Customer identifier
      payment_id: '18641868', // Payment identifier
      payment_amount: 8855, // Payment amount
      payment_currency: 'USD', // Payment currency code 
      redirect_on_mobile: true, // Indicator for opening the form as a separate HTML page
                              // on mobile devices
      signature: 'YWb6Z20ByxpQ30hfTI' }, // Signature
    'post')

EPayWidget.run(
    { project_id: 42, // Project identifier
      customer_id: '17008', // Customer identifier
      payment_id: '18641868', // Payment identifier
      payment_amount: 8855, // Payment amount
      payment_currency: 'USD', // Payment currency code 
      redirect_on_mobile: true, // Indicator for opening the form as a separate HTML page
                              // on mobile devices
      signature: 'YWb6Z20ByxpQ30hfTI' }, // Signature
    'post')

When either of the methods (bind and run) is used, the HTML code of the web service page looks as follows.

<html>
<head>
<!-- Adding ecommpay libraries -->
  <link rel="stylesheet" href="https://paymentpage.ecommpay.com/shared/merchant.css">
  <script src="https://paymentpage.ecommpay.com/shared/merchant.js"></script>
  <script type="text/javascript">var EP_HOST = 'https://paymentpage.ecommpay.com';</script>
<!-- Other parts -->
</head>
<body>
  <!-- JS command to open Payment Page -->
  <script type="text/javascript">
      EPayWidget.run({ project_id: 42,
                       customer_id: '17008',
                       payment_id: '18641868',
                       payment_amount: 8855,
                       payment_currency: 'USD',
                       redirect_on_mobile: true,
                       signature: 'YWb6Z20ByxpQ30hfTI' });
  </script>
  <!-- Other parts -->
</body>
</html>