Summary

The current status of abci++ branch does not use ABCI++ in an advanced way. The App persistent_kvstore is populating the two fields of the vote extension with the validator's address. Not clear to me what the use case is, other that testing non-nil vote extensions.

Problem Definition

We may decide to extend one (or more) of the apps to make an advanced use of ABCI++.
Or we may decide to add a new app that render itself as a natural use case for ABCI++.
Bear in mind this might have to be split into two parts if vote extensions are postponed.

Dependencies

None

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