4298bbcc4e
* Added BlockStore.DeleteBlock() * Added initial block pruner prototype * wip * Added BlockStore.PruneBlocks() * Added consensus setting for block pruning * Added BlockStore base * Error on replay if base does not have blocks * Handle missing blocks when sending VoteSetMaj23Message * Error message tweak * Properly update blockstore state * Error message fix again * blockchain: ignore peer missing blocks * Added FIXME * Added test for block replay with truncated history * Handle peer base in blockchain reactor * Improved replay error handling * Added tests for Store.PruneBlocks() * Fix non-RPC handling of truncated block history * Panic on missing block meta in needProofBlock() * Updated changelog * Handle truncated block history in RPC layer * Added info about earliest block in /status RPC * Reorder height and base in blockchain reactor messages * Updated changelog * Fix tests * Appease linter * Minor review fixes * Non-empty BlockStores should always have base > 0 * Update code to assume base > 0 invariant * Added blockstore tests for pruning to 0 * Make sure we don't prune below the current base * Added BlockStore.Size() * config: added retain_blocks recommendations * Update v1 blockchain reactor to handle blockstore base * Added state database pruning * Propagate errors on missing validator sets * Comment tweaks * Improved error message Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com> * use ABCI field ResponseCommit.retain_height instead of retain-blocks config option * remove State.RetainHeight, return value instead * fix minor issues * rename pruneHeights() to pruneBlocks() * noop to fix GitHub borkage Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>
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,pubkey2!power2,pubkey3!power3"
where pubkeyN is a base64-encoded 32-byte ed25519 key and powerN is a new voting power for the validator with pubkeyN (possibly a new one).
To remove a validator from the validator set, set power to 0.
There is no sybil protection against new validators joining.