Trait sp_state_machine::ChangesTrieStorage[−][src]

pub trait ChangesTrieStorage<H: Hasher, Number: BlockNumber>: RootsStorage<H, Number> {
    fn as_roots_storage(&self) -> &dyn RootsStorage<H, Number>;

    fn with_cached_changed_keys(
        &self, 
        root: &H::Out, 
        functor: &mut dyn FnMut(&HashMap<Option<PrefixedStorageKey>, HashSet<StorageKey>>)
    ) -> bool;

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

Changes trie storage. Provides access to trie roots and trie nodes.

Required methods

Casts from self reference to RootsStorage reference.

Execute given functor with cached entry for given trie root. Returns true if the functor has been called (cache entry exists) and false otherwise.

Get a trie node.

Implementors