if I remember correctly @brianoflondon has even made it possible for a Hive user to pay using Hive thru some app of his which automatically exchanges the HIVE for sats which can be further used as payments through the lightning network..
That's great, seeing people who accept HIVE for product, it's my first time hearing that. ✌
Https://V4v.app you paste in a Lightning invoice and pay with Hive or HBD. Simple.