NewPubAndHashUpdates constructs an empty PubAndHashUpdates.

Block is used to used to hold the information from its proto format to a structure that is more suitable/friendly for validation.

PubAndHashUpdates encapsulates public and hash updates.

Transaction is used to hold the information from its proto format to a structure that is more suitable/friendly for validation.

Validator is supposed to validate the transactions based on public data and hashes present in a block and returns a batch that should be used to update the state.