Struct casper_execution_engine::storage::global_state::lmdb::LmdbGlobalState

pub struct LmdbGlobalState { /* private fields */ }

Global state implemented against LMDB as a backing data store.

Implementations

impl LmdbGlobalState

pub fn empty( environment: Arc<LmdbEnvironment>, trie_store: Arc<LmdbTrieStore> ) -> Result<Self, Error>

Creates an empty state from an existing environment and trie_store.

pub fn new( environment: Arc<LmdbEnvironment>, trie_store: Arc<LmdbTrieStore>, empty_root_hash: Digest ) -> Self

Creates a state from an existing environment, store, and root_hash. Intended to be used for testing.

pub fn create_scratch(&self) -> ScratchGlobalState

Creates an in-memory cache for changes written.

pub fn put_stored_values( &self, correlation_id: CorrelationId, prestate_hash: Digest, stored_values: HashMap<Key, StoredValue> ) -> Result<Digest, Error>

Write stored values to LMDB.

pub fn environment(&self) -> &LmdbEnvironment

Get a reference to the lmdb global state’s environment.

pub fn trie_store(&self) -> &LmdbTrieStore

Get a reference to the lmdb global state’s trie store.

pub fn empty_state_root_hash(&self) -> Digest

Returns an initial, empty root hash of the underlying trie.

Trait Implementations

impl CommitProvider for LmdbGlobalState

fn commit( &self, correlation_id: CorrelationId, prestate_hash: Digest, effects: AdditiveMap<Key, Transform> ) -> Result<Digest, Self::Error>

Applies changes and returns a new post state hash. block_hash is used for computing a deterministic and unique keys.

impl StateProvider for LmdbGlobalState

fn missing_children( &self, correlation_id: CorrelationId, trie_raw: &[u8] ) -> Result<Vec<Digest>, Self::Error>

Finds all of the keys of missing directly descendant Trie<K,V> values.

fn delete_keys( &self, correlation_id: CorrelationId, state_root_hash: Digest, keys: &[Key] ) -> Result<DeleteResult, Self::Error>

Delete keys.

type Error = Error

Associated error type for StateProvider.

type Reader = LmdbGlobalStateView

Associated reader type for StateProvider.

fn checkout( &self, state_hash: Digest ) -> Result<Option<Self::Reader>, Self::Error>

Checkouts to the post state of a specific block.

fn empty_root(&self) -> Digest

Returns an empty root hash.

fn get_trie_full( &self, _correlation_id: CorrelationId, trie_key: &Digest ) -> Result<Option<TrieRaw>, Self::Error>

Reads a full Trie (never chunked) from the state if it is present

fn put_trie( &self, correlation_id: CorrelationId, trie: &[u8] ) -> Result<Digest, Self::Error>

Insert a trie node into the trie