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>, String>;
}

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

Associated Types

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

Type of in-memory overlay.

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Required methods

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

Get the value stored at key.

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Implementations on Foreign Types

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

type Overlay = PrefixedMemoryDB<H>

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

impl<H: Hasher> TrieBackendStorage<H> for PrefixedMemoryDB<H>

type Overlay = PrefixedMemoryDB<H>

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

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Implementors

impl<H: Hasher> TrieBackendStorage<H> for MemoryDB<H>

type Overlay = MemoryDB<H>

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

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