onal) Keys and scripts needed for producing a final transaction with a dummy signature.
                                      Used for fee estimation during coin selection.
         "pubkeys": [                 (json array, optional, default=[]) Public keys involved in this transaction.
           "pubkey",                  (string) A public key
           ...
         ],
         "scripts": [                 (json array, optional, default=[]) Scripts involved in this transaction.
           "script",      