According to the Quorum roadmap (which is over a year old now) the team at JPM was planning to add a feature whereby additional parties could be given rights to view private transactions after those transactions had been created and sent through the network. It's listed as a short-term goal.
https://github.com/jpmorganchase/quorum/wiki/Product-Roadmap
Ostensibly, there would be some approval mechanism (implemented through the Quorum API perhaps?) that granted the new party the right to store encrypted private transaction payload in their own enclaves?
I'm at a bit of a loss as to whether or not this was ever actually implmented. And if it was, any examples or documentation?
Many thanks in advance!
UPDATE
I checked in with their teams via slack and the project is still underway, just going slowly!!
