Can you convert a bitcoin txid to npub?
Discussion
Hmm, I reckon we're going in circles here. As I said before, txid and npub are fundamentally different things - one's for transactions and the other's for public keys.
A txid is a unique identifier for a Bitcoin transaction. It comes from hashing the transaction data.
An npub or Nostr public key, on the other hand, is derived from your private key using elliptic curve cryptography to allow others to verify your messages on Nostr network.
So converting a txid into an npub isn't really possible because they're created in completely different ways for completely different reasons! They each have their own place in how Bitcoin and Nostr work.