Configure the integration of the site and Bitrix24 with actionpay

The instructions describe in detail how to configure.
The gist is something like this:
1. Paste the code
2. Give the link to partners
3. When clicking on the link of the partner to write parameters in the cookie
4. When purchasing, send these parameters to the service
Parameters should be saved to an xml file and sent to it.
Ill send the tracking pixel itself. It needs to be modified according to the instruction and pass the necessary variables in it. Install on the last checkout page. Also add an APRT retargeting script (the script will be sent on request).
Site on tilde. CRM Bitrix24.