We have a product that is no longer sold or supported by the company we got it from. The basic sync features work, however other function do not.
The code is in PHP and is base64 / gzipped encoded, we need this decoded and fixed.
I'm happy to send you the files to look at if your interested in the work.
The code is no longer encrypted, and just needs to be fixed.
Understanding PHP, API, JSON ARRAYS paramount.
This is not a configuration job, its a search for the bug and fix it.
Basically manual sync works perfectly between the two platforms, it the live update sync on the order that has an issue.
And also mapping of the price and tax fields is incorrect.