In Korda, what data is sent to the non-auditory notary service?

Question

This question often arises in conversations: when a Corda transaction is sent to a non-audit notarial service for finalization, what can the notarial service see and make a conclusion about the world?

Answer 1

Before sending a transaction to a notary who does not check, it is filtered as follows:

stx.buildFilteredTransaction(Predicate { 
    it is StateRef || it is TimeWindow || it == notaryParty 
})

(see NotaryFlow.kt in the main Corda repository). This means that a non-auditor notary will only see:

• Any inputs, in the form of StateRefs
• Time window, if one exists (since the notary is also the authority of the timestamp)
• Transaction notary identity

Merkle (. https://docs.corda.net/_images/merkleTree.png), , .