If anyone is looking to use these Merkury bulbs in homeassistant with local tuya?
The easiest way in October 2021
bluestacks android emulator
smartlife app (old ass version from apk download site)
bluestacks tweaker app (gets root on the emulator so you can pull the file that has the keys)
There was one video I saw that got pretty close to something like this, but I think the guy was using a rooted phone or something and not the rooted emulator. Yes, the video tells you what version of smartlife app that you can use to get the keys. then he’s got a really dangerous looking windows script (not recommended) to pull the keys out of the file.