This page is for the classic Hosted Payment Pages (HPP) integration, which has reached end-of-life. We are no longer processing transactions though HPP. If you have any questions, contact our Support Team.
To verify that the values, which you have received in the result URL, are valid and have not been tampered in the process, refer to this example.
If you extract the parameters, you have:
Concatenate the keys and values as:
This string contains values for you to calculate
merchantSig with HMAC SHA-256 key.
If some parameters are missing in the URL, they should be also omitted in the concatenated string. For example, if the
reason fields are not provided, the string above should look as follows: