96ae535fb8
This PR changes ABCI time format from int64 (Unix seconds) to WKT (WellKnownType) google.protobuf.Timestamp. Refs #1857 Reasons: better precision standard DT for proto * update Gopkg.lock * [makefile] remove extra grep - go list excludes vendor by default now * proto3 timestamp * [docs/abci-spec] note about serialisation format * make time non-nullable
KVStore
There are two app's here: the KVStoreApplication and the PersistentKVStoreApplication.
KVStoreApplication
The KVStoreApplication is a simple merkle key-value store.
Transactions of the form key=value are stored as key-value pairs in the tree.
Transactions without an = sign set the value to the key.
The app has no replay protection (other than what the mempool provides).
PersistentKVStoreApplication
The PersistentKVStoreApplication wraps the KVStoreApplication and provides two additional features:
- persistence of state across app restarts (using Tendermint's ABCI-Handshake mechanism)
- validator set changes
The state is persisted in leveldb along with the last block committed, and the Handshake allows any necessary blocks to be replayed. Validator set changes are effected using the following transaction format:
val:pubkey1/power1,addr2/power2,addr3/power3"
where power1 is the new voting power for the validator with pubkey1 (possibly a new one).
There is no sybil protection against new validators joining.
Validators can be removed by setting their power to 0.