Is there a reason that NIP47 doesn't have a "payment_received" result_type sent from the wallet service ? it would be very useful.
Discussion
Could be! Most NWC implementations, and zaps, will poll with `lookup_invoice`. Doesn't seem ideal.
It seems brutal to do this but needs must.
Indeed, especially with websockets. It usually adds some latency based on the poll frequency, or just a bunch of repeat requests.
I've read in some NWC code, I believe, some form of notifications on the subscription to the relay, but haven't read more into it yet. It may have been in the nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm implementation or a fork of satdress. NIP-47 doesn't mention anything atleast.