Hyperledger fabric : Publish message between parties in a channel

Question

Scenario : A hyperledger-fabric blockchain with a channel and 2 parties. If PartyB wants to read info off the ledger which isn't readily available, is it possible for PartyA after updating the ledger notify PartyB to check query the ledger ? ( notify / publish within the blockchain )

I know it can be easily done external to the blockchain but is it possible to do it within the blockchain ?

Answer 1

The way to do that, is that party B would subscribe to events and parse them, and then decide if the data it is interested in, is in the blockchain or not.