Login to admin panel in menu "Plugins -> Manage plugins".

After opening the list of modules, click on the " + " to download and install the module.

In the opened window, click "Upload" and select the attached archive paykassa.zip.
Then "Upload and install".

Wait for the installed module. PayKassa should appear in the list among others
modules.

Next to the module icon click enable.

Go to menu "Administration -> payment Methods".

In the opened window enter a name and select the CPU PayKassa, billing category
"Internet-payments", enter the description of the payment method, include the status of the method.
To add icons download the attached file logo.png.
Then go to the tab above "Configure".

Be sure to fill in:

ID of store ID of your store in the system paykassa.pro (can be found in the personal Cabinet);

Secret key – secret key of your shop in the system paykassa.pro (you point it out
themselves);

Currency store provide the exact same that is used in your shop;

Test mode – used to test payments.

Then click "Create". Module successfully configured on your website.

Specify the URL in the "Account PayKassa → Store → Settings → Technical".

URL successful payment

https:// *****/?dispatch=payment_notification.success&payment=paykassa

The URL for unsuccessful payment

https:// *****/?dispatch=payment_notification.fail&payment=paykassa

URL notification

https:// *****/?dispatch=payment_notification.notify&payment=paykassa

Where the * * * * * is your domain

To apply the changes.
Module PayKassa for CMS CS-Cart 4.x.x configured.