[−][src]Trait casper_execution_engine::storage::global_state::StateReader

pub trait StateReader<K, V> {
    type Error;
    pub fn read(
        &self, 
        correlation_id: CorrelationId, 
        key: &K
    ) -> Result<Option<V>, Self::Error>;

    pub fn read_with_proof(
        &self, 
        correlation_id: CorrelationId, 
        key: &K
    ) -> Result<Option<TrieMerkleProof<K, V>>, Self::Error>;

    pub fn read_trie(
        &self, 
        correlation_id: CorrelationId, 
        trie_key: &Blake2bHash
    ) -> Result<Option<Trie<K, V>>, Self::Error>;
}

A reader of state

Associated Types

type Error[src]

An error which occurs when reading state

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Required methods

pub fn read(
    &self,
    correlation_id: CorrelationId,
    key: &K
) -> Result<Option<V>, Self::Error>[src]

Returns the state value from the corresponding key

pub fn read_with_proof(
    &self,
    correlation_id: CorrelationId,
    key: &K
) -> Result<Option<TrieMerkleProof<K, V>>, Self::Error>[src]

Returns the merkle proof of the state value from the corresponding key

pub fn read_trie(
    &self,
    correlation_id: CorrelationId,
    trie_key: &Blake2bHash
) -> Result<Option<Trie<K, V>>, Self::Error>[src]

Reads a Trie<K,V> from the state if it is present

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Implementors

impl StateReader<Key, StoredValue> for InMemoryGlobalStateView[src]

type Error = Error

pub fn read_trie(
    &self,
    _correlation_id: CorrelationId,
    trie_key: &Blake2bHash
) -> Result<Option<Trie<Key, StoredValue>>, Self::Error>[src]

Reads a Trie<K,V> from the state if it is present

impl StateReader<Key, StoredValue> for LmdbGlobalStateView[src]

type Error = Error

pub fn read_trie(
    &self,
    _correlation_id: CorrelationId,
    trie_key: &Blake2bHash
) -> Result<Option<Trie<Key, StoredValue>>, Self::Error>[src]

Reads a Trie<K,V> from the state if it is present

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