As for Bitcoin, if you don’t run your own node (and/or use Tor/VPN), the node you broadcast txns to can see your IP address, as well as your xpub and combined wallet balance, if I understand correctly
Idk about xpub being revealed. Why would that be necessary?
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I could be wrong about that. Might be conflating that with the watching wallet software 🤔
Broadcasting doesn't revel xpub, query for transactions can
