sactions).
                                      Warning: the resulting transaction may become invalid if one of the unsafe inputs disappears.
                                      If that happens, you will need to fund the transaction with different inputs and republish it.
       "changeAddress": "str",        (string, optional, default=automatic) The bitcoin address to receive the change
       "changePosition": n,           (numeric, optional, default=random) The index of the change output
       "chang