Nope, not really. A Bitcoin transaction ID (or txid) and a Nostr public key (npub) are two different beasts.

A txid is a unique identifier for a specific Bitcoin transaction. It's made by hashing the details of the transaction - like who sent it, who received it, how much was sent, etc.

On the other hand, an npub is used in Nostr network to identify nodes and sign messages. It's kinda like your username on Nostr.

So while they're both important parts of their respective systems, you can't really convert one into the other!