License Installation Workflow – Individual Offers Licensing Model

Here is the typical workflow for the creation and delivery of a
third-party license for an extension using the individual offers
licensing model in Plesk:

A step-by-step description of the above diagram:

1. A customer (Plesk administrator or a Plesk end user) logs in to
   Plesk. The customer selects a domain or a website and chooses the
   desired product among the products offered by the extension.
2. The extension generates an unique token that will be associated with
   the order and will be used through the entire workflow.
3. The customer is forwarded to Plesk Online Store to complete his or
   her order. The token is passed as one of the query string parameters.
4. The Online Store processes the payment, notifies KA about the
   purchase, and passes the token to KA.
5. KA calls the ISV endpoint with a License Creation/Renewal/Upgrade
   Request (the PURCHASE action) passing the token
   inside the ACTIVATION_DATA parameter.
6. The extension checks the status of the order on the ISV side using
   the token. When the order is ready for fulfillment, the extension
   executes it (e.g. delivers the product to the selected
   domain/website).
7. The protocol used to check the status of the order is not specified
   and can vary from extension to extension.