Incremental snapshots only calculate their accounts hash based on the
account changes WITHIN the incremental slot range. So, we need to keep track
of the full snapshot expected accounts hash results. We also need to keep
track of the hash and capitalization specific to the incremental snapshot
slot range. The capitalization we calculate for the incremental slot will
NOT be consistent with the bank’s capitalization. It is not feasible to
calculate a capitalization delta that is correct given just incremental
slots account data and the full snapshot’s capitalization.
Helper type to wrap AccountsDbFields when reconstructing AccountsDb from either just a full
snapshot, or both a full and incremental snapshot
Helper type to wrap BankFields when reconstructing Bank from either just a full
snapshot, or both a full and incremental snapshot
Helper type to wrap BufReader streams when deserializing and reconstructing from either just a
full snapshot, or both a full and incremental snapshot