Can I recover the WhatsApp chat history from a damaged phone?

My phone has suffered physical damage and it will no longer turn on. I have given it to a phone repair shop in the hope that the data is still alive in there and that it can be extracted using external means. Assuming I can get a copy of the internal storage of that phone into a thumb drive, one of the things I would like to recover from it is the WhatsApp chat history. The [standard procedure](https://android.stackexchange.com/questions/74973/transfer-whatsapp-chat-history-to-new-device) , however, requires a working Android system on the old phone to work, and this might be a little too much of a stretch given the damage. Is there a way to recover the chat history given these circumstances? Or is it lost to history due to WhatsApp's encryption mechanisms?