By the way, are you the Captain Stacks who did the Pleblab Nostr course with Super Testnet? I'm literally going through the nostr-tools lesson as we speak. So bullish on Nostr right now.
Discussion
One thing I've learned so far from nostr:npub1yxp7j36cfqws7yj0hkfu2mx25308u4zua6ud22zglxp98ayhh96s8c399s's part of the course is that NIP-04 encrypted messages use a shared secret.