{
  "size1": 1,
  "size2": 8,
  "root1": "bjQLnP+zepicpUTmu3gKLHiQHT+zNzh2hRGjBhevoB0=",
  "root2": "XcnaeacGWamtVZy3Ad7ZoqudgjqtL0lgz+Nw7/RgQyg=",
  "proof": [],
  "desc": "empty proof",
  "wantErr": true
}