Comment by jb55

Zaps just put a signed nostr note inside a lightning invoice so that clients can show that a specific user send some amount of money to some note or profile. clients request lightning invoices via lnurl (an http lightning specification). You could do the same thing for any other fiat or crypto system if you want to, but nostr was mainly build by bitcoiners which is why there is lots of bitcoin tech integrated, but its completely optional.