NUT-01
Mint public key exchange
MANDATORY
NUT-01: Public Key Exchange
Alice (wallet) receives Bob's (mint) public keys via GET /v1/keys to unblind blind signatures (NUT-00).
Meet the Characters
Alice
Wants to send money privately
Bob
The mint operator
Carol
Receives the payment
Active Keysets
The mint only responds with 'active' keysets, which are used for new signatures. Inactive keysets are accepted for inputs but not used for new outputs.