Technical Licensing Question for Custom Plugins

Is there a dedicated developer forum for these kind of questions? If so, please give me a hint.

I am migrating my plugins from EliteLicenser and SureCart to FluentCart, and I wonder if there are some hooks/checks to protect premium functions with a license check. EliteLicenser has such a feature that checks if a certain function is part of the license. While I can query my server each time, it seems overly expensive to do so. I know the developer docs are still work in progress, but can someone point me to the necessary PHP functions/hooks that are available for license checks in custom plugins?