[brainstorm] Sender/receiver privacy

[dongcarl]

Sender/receiver privacy should be maintained to the best of our abilities.

Sender Privacy
Right now, the sender can tip anonymously. The only information we're privy to on that can be tied to the sender is the fulfilled invoice.

Receiver Privacy
Right now, receiving requires signup using one of our OAuth integrations. We also connect to nodes thru IPv4.

We should:

• Enable signup using usernames/emails
• Enable connecting to nodes thru Tor

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The above is most likely incomplete, please comment below on other privacy concerns.