Hi,
It's technically possible as whatsapp has some API to connect to it:
developers.facebook.com/docs/whatsapp
But this wouldn't be included in HikaShop. It could be done as an external plugin.
Now I don't see us developping that any time soon as no one else requested such a thing so far.
But you can have a developer work on it for you if that's something you're keen on having soon.
I'm not sure what you mean by "Is there an array that shows me all the values of an order?". Could you describe what you're trying to do and why so that we better understand what is needed ?