Trait sp_trie::TrieMut

source · [−]
pub trait TrieMut<L> where
    L: TrieLayout, {
    fn root(&mut self) -> &<<L as TrieLayout>::Hash as Hasher>::Out;

    fn is_empty(&self) -> bool;

    fn get<'a, 'key>(
        &'a self, 
        key: &'key [u8]
    ) -> Result<Option<Vec<u8, Global>>, Box<TrieError<<<L as TrieLayout>::Hash as Hasher>::Out, <<L as TrieLayout>::Codec as NodeCodec>::Error>, Global>>
    where
        'a: 'key;

    fn insert(
        &mut self, 
        key: &[u8], 
        value: &[u8]
    ) -> Result<Option<Vec<u8, Global>>, Box<TrieError<<<L as TrieLayout>::Hash as Hasher>::Out, <<L as TrieLayout>::Codec as NodeCodec>::Error>, Global>>;

    fn remove(
        &mut self, 
        key: &[u8]
    ) -> Result<Option<Vec<u8, Global>>, Box<TrieError<<<L as TrieLayout>::Hash as Hasher>::Out, <<L as TrieLayout>::Codec as NodeCodec>::Error>, Global>>;

    fn contains(
        &self, 
        key: &[u8]
    ) -> Result<bool, Box<TrieError<<<L as TrieLayout>::Hash as Hasher>::Out, <<L as TrieLayout>::Codec as NodeCodec>::Error>, Global>> { ... }
}
Expand description

Various re-exports from the trie-db crate. A key-value datastore implemented as a database-backed modified Merkle tree.

Required methods

Return the root of the trie.

Is the trie empty?

What is the value of the given key in this trie?

Insert a key/value pair into the trie. An empty value is equivalent to removing key from the trie. Returns the old value associated with this key, if it existed.

Remove a key from the trie. Equivalent to making it equal to the empty value. Returns the old value associated with this key, if it existed.

Provided methods

Does the trie contain a given key?

Implementations on Foreign Types

Implementors