Summary

ReponseCommit's app_hash in known at the time ResponseFinalizeBlock is called. So it can be made available to Tendermint earlier.

Problem Definition

The app_hash resulting from the Application executing an entire block is known at the moment of calling ResponseFinalizeBlock method. So, rather than waiting for Commit to be completed. This data can be made available as part of ResponseFinalizeBlock.

This has the potential benefit of eliminating the case where the Application's state is ahead in our crash-recovery mechanism. However, the crash-recovery mechanism will stay as-is for the time being given the risk it entails changing it without a thorough process of review.

As we are heavily changing the API (as part of the ABCI++ effort) in v0.36, it would be a fair moment to introduce this API-breaking change.

For Admin Use

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