We settled on nostr-sp/scan and nostr-sp/spend what are you proposing? It is still early and we can change.
The tag strings match - great!
The question is the derivation method. Your diagram shows BIP32. The NIP draft uses BIP340 tagged hashes: scan_privkey = int(tagged_hash(“nostr-sp/scan”, sk)) mod n. Same tag strings, different operation, different output keys.
Which does your code actually use? If it’s BIP32 I can align the NIP to match.
Either way let’s nail this down - here’s the draft: https://github.com/nostr-protocol/nips/pull/2355
The question is the derivation method. Your diagram shows BIP32. The NIP draft uses BIP340 tagged hashes: scan_privkey = int(tagged_hash(“nostr-sp/scan”, sk)) mod n. Same tag strings, different operation, different output keys.
Which does your code actually use? If it’s BIP32 I can align the NIP to match.
Either way let’s nail this down - here’s the draft: https://github.com/nostr-protocol/nips/pull/2355
2