type `ReimbursablePromissory`

`common.ReimbursablePromissory`

Field	Type	Description
transferred	bytes	A single transferred promissory file. owner -&rt; recipient
change `optional`	bytes	Change portion to be returned immediately upon successful lock. owner -&rt; owner
refund `optional`	bytes	A refund of `transferred` in the event this promissory needs to be returned. owner -&rt; owner

{
  "transferred": "LengthOfFileBytesVaries=",
  "change": "LengthOfFileBytesVaries=",
  "refund": "LengthOfFileBytesVaries="
}