One problem that nostr has yet to solve afaik is to reliably search for a note or profile
Reliably = 100% success rate
Hard to build on top of it if this is not solved
I think you’re confusing what an invoice vs ln address is 🙂
Invoices expire and ln addresses don’t. Most wallets don’t support Ln address yet. Also it’s easy to tell what a ln address looks like, they look just like email addresses
Notes by chua | export