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Ohh okay that explains ALOT!! npub is your public key or encryption by identity. Your private key is how you log in. Just like how a bitcoin wallet. You give your public key to others so they can send BTC, and use the private key to access it. Except npub is that for Nostr
if you want to send me btc, you can just click like mad on that lightning mark. lol What does Nostr do exactly? I hear people keep talking about it.