[−][src]Trait casperlabs_engine_storage::global_state::StateProvider

pub trait StateProvider {
    type Error;
    type Reader: StateReader<Key, StoredValue, Error = Self::Error>;
    fn checkout(
        &self, 
        state_hash: Blake2bHash
    ) -> Result<Option<Self::Reader>, Self::Error>;

    fn commit(
        &self, 
        correlation_id: CorrelationId, 
        state_hash: Blake2bHash, 
        effects: AdditiveMap<Key, Transform>
    ) -> Result<CommitResult, Self::Error>;

    fn put_protocol_data(
        &self, 
        protocol_version: ProtocolVersion, 
        protocol_data: &ProtocolData
    ) -> Result<(), Self::Error>;

    fn get_protocol_data(
        &self, 
        protocol_version: ProtocolVersion
    ) -> Result<Option<ProtocolData>, Self::Error>;

    fn empty_root(&self) -> Blake2bHash;
}

Associated Types

type Error

type Reader: StateReader<Key, StoredValue, Error = Self::Error>

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Required methods

fn checkout(
    &self,
    state_hash: Blake2bHash
) -> Result<Option<Self::Reader>, Self::Error>

Checkouts to the post state of a specific block.

fn commit(
    &self,
    correlation_id: CorrelationId,
    state_hash: Blake2bHash,
    effects: AdditiveMap<Key, Transform>
) -> Result<CommitResult, Self::Error>

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

fn put_protocol_data(
    &self,
    protocol_version: ProtocolVersion,
    protocol_data: &ProtocolData
) -> Result<(), Self::Error>

fn get_protocol_data(
    &self,
    protocol_version: ProtocolVersion
) -> Result<Option<ProtocolData>, Self::Error>

fn empty_root(&self) -> Blake2bHash

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Implementors

impl StateProvider for InMemoryGlobalState[src]

type Error = Error

type Reader = InMemoryGlobalStateView

impl StateProvider for LmdbGlobalState[src]

type Error = Error

type Reader = LmdbGlobalStateView

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