Trait sp_state_machine::TrieBackendStorage

pub trait TrieBackendStorage<H: Hasher>: Send + Sync {
    type Overlay: HashDB<H, DBValue> + Default + Consolidate;

    fn get(
        &self,
        key: &H::Out,
        prefix: Prefix<'_>
    ) -> Result<Option<DBValue>, DefaultError>;
}

Key-value pairs storage that is used by trie backend essence.

Required Associated Types

type Overlay: HashDB<H, DBValue> + Default + Consolidate

Type of in-memory overlay.

Required Methods

fn get(
    &self,
    key: &H::Out,
    prefix: Prefix<'_>
) -> Result<Option<DBValue>, DefaultError>

Get the value stored at key.

Implementations on Foreign Types

impl<T: TrieBackendStorage<H>, H: Hasher> TrieBackendStorage<H> for &T

type Overlay = <T as TrieBackendStorage<H>>::Overlay

fn get(
    &self,
    key: &H::Out,
    prefix: Prefix<'_>
) -> Result<Option<DBValue>, DefaultError>

impl<H: Hasher> TrieBackendStorage<H> for Arc<dyn Storage<H>>

type Overlay = MemoryDB<H, PrefixedKey<H>, Vec<u8, Global>, MemCounter<Vec<u8, Global>>>

fn get(
    &self,
    key: &H::Out,
    prefix: Prefix<'_>
) -> Result<Option<DBValue>, DefaultError>

impl<H, KF> TrieBackendStorage<H> for GenericMemoryDB<H, KF>where
    H: Hasher,
    KF: KeyFunction<H> + Send + Sync,

type Overlay = MemoryDB<H, KF, Vec<u8, Global>, MemCounter<Vec<u8, Global>>>

fn get(
    &self,
    key: &H::Out,
    prefix: Prefix<'_>
) -> Result<Option<DBValue>, DefaultError>

Implementors