I'm curious though why Zap wouldn't use something like NANO (XNO) instead of BTC though. It's almost instant, and is inherently feeless. It does this without the need for a second layer, and uses ridiculously less power as well. It just seems like a no-brainer for everything this platform (as well as Zap) is about.
Discussion
What do you think is it possible to add #NANO address to Amethyst user profile and button to make payments in #XNO?
Pretty much! Add as your "website": nano:YOUR_NANO_ACCOUNT
Like:
nano:nano_165ncyhzggm6d9isrhfu956s6dnrt3tca8dge86b4uw97zddmt9cfwzyo63i
When clicking, this will trigger the automatic opening of the nano wallet.