StateProof verification fails silently

[domwoe]

We noticed, that Indy VDR performs a state proof verification for each response of a read request to the ledger, but it seems there's no indication if the verification was successful or failed (except a trace message).

Did I miss anything here?

[andrewwhitehead]

This is by design, and consistent with the behaviour in indy-sdk. IIRC the state proof verification may fail when generated for a different epoch (which changes every 5 minutes) due to clock skew or delays in receiving the response from the server. I don't think every response type supports a state proof either. But a consensus response from the verifier nodes is also considered acceptable, this is generally n / 3 + 1 identical responses where n is the number of verifier nodes.