Sharing a transaction between two clients

[unilynx]

Could I use pgcat in some way to 'share' or 'transfer' a connection, including a transaction, to a different process connected to the same 'pgcat' instance?

I'm trying to have two programming languages, in different processes on the same host, work on the same transaction: ie

• one process does a BEGIN WORK
• does some queries
• invokes a rpc on the second proces and a token referring to the transaction
• second process does some modifications, returns from the rpc
• first process decides whether to commit or abort

I've looked at two-phase commits but these do not allow an atomic rollback