Added base "unit" tag to NutZap kind:9321 event (#1915)

61.md

@@ -51,6 +51,7 @@ Clients MUST prefix the public key they P2PK-lock with `"02"` (for nostr<>cashu
     "pubkey": "<sender-pubkey>",
     "tags": [
         [ "proof", "{\"amount\":1,\"C\":\"02277c66191736eb72fce9d975d08e3191f8f96afb73ab1eec37e4465683066d3f\",\"id\":\"000a93d6f8a1d2c4\",\"secret\":\"[\\\"P2PK\\\",{\\\"nonce\\\":\\\"b00bdd0467b0090a25bdf2d2f0d45ac4e355c482c1418350f273a04fedaaee83\\\",\\\"data\\\":\\\"02eaee8939e3565e48cc62967e2fde9d8e2a4b3ec0081f29eceff5c64ef10ac1ed\\\"}]\"}" ],
+        [ "unit", "sat" ],
         [ "u", "https://stablenut.umint.cash" ],
         [ "e", "<nutzapped-event-id>", "<relay-hint>" ],
         [ "k", "<nutzapped-kind>"],
@@ -62,6 +63,7 @@ Clients MUST prefix the public key they P2PK-lock with `"02"` (for nostr<>cashu
 * `.content` is an optional comment for the nutzap
 * `.tags`:
   * `proof` is one or more proofs P2PK-locked to the public key the recipient specified in their `kind:10019` event and including a DLEQ proof.
+  * `unit` the base unit the proofs are denominated in (eg: `sat`, `usd`, `eur`). Default: `sat` if omitted.
   * `u` is the mint the URL of the mint EXACTLY as specified by the recipient's `kind:10019`.
   * `p` is the Nostr identity public key of nutzap recipient.
   * `e` is the event that is being nutzapped, if any.
@@ -95,6 +97,7 @@ Multiple `kind:9321` events can be tagged in the same `kind:7376` event.
     "content": nip44_encrypt([
         [ "direction", "in" ], // in = received, out = sent
         [ "amount", "1" ],
+        [ "unit", "sat" ],
         [ "e", "<7375-event-id>", "<relay-hint>", "created" ] // new token event that was created
     ]),
     "tags": [