ect)
  "time" : xxx,                         (numeric) The timestamp for the final block in the window, expressed in UNIX epoch time
  "txcount" : n,                        (numeric, optional) The total number of transactions in the chain up to that point, if known. It may be unknown when using assumeutxo.
  "window_final_block_hash" : "hex",    (string) The hash of the final block in the window
  "window_final_block_height" : n,      (numeric) The height of the final block in the window.
  "window_block_co