 if key is not present, fee is unknown and clients MUST NOT assume there isn't one
      "sigops" : n,                        (numeric) total SigOps cost, as counted for purposes of block limits; if key is not present, sigop cost is unknown and clients MUST NOT assume it is zero
      "weight" : n                         (numeric) total transaction weight, as counted for purposes of block limits
    },
    ...
  ],
  "coinbaseaux" : {                        (json object) data that should be included in the 