Struct sp_trie::cache::TrieCache

pub struct TrieCache<'a, H: Hasher> { /* private fields */ }

The actual TrieCache implementation.

If this instance was created for using it with a TrieDBMut, it needs to be merged back into the LocalTrieCache with Self::merge_into after all operations are done.

Implementations

impl<'a, H: Hasher> TrieCache<'a, H>

pub fn merge_into(self, local: &LocalTrieCache<H>, storage_root: H::Out)

Merge this cache into the given LocalTrieCache.

This function is only required to be called when this instance was created through LocalTrieCache::as_trie_db_mut_cache, otherwise this method is a no-op. The given storage_root is the new storage root that was obtained after finishing all operations using the TrieDBMut.

Trait Implementations

impl<'a, H: Hasher> TrieCache<NodeCodec<H>> for TrieCache<'a, H>

fn get_or_insert_node(
    &mut self,
    hash: H::Out,
    fetch_node: &mut dyn FnMut() -> Result<NodeOwned<H::Out>, H::Out, Error<H::Out>>
) -> Result<&NodeOwned<H::Out>, H::Out, Error<H::Out>>

Get or insert a NodeOwned.

fn get_node(&mut self, hash: &H::Out) -> Option<&NodeOwned<H::Out>>

Get the NodeOwned that corresponds to the given hash.

fn lookup_value_for_key(&mut self, key: &[u8]) -> Option<&CachedValue<H::Out>>

Lookup value for the given key.

fn cache_value_for_key(&mut self, key: &[u8], data: CachedValue<H::Out>)

Cache the given value for the given key.