Struct reference_trie::ReferenceNodeCodec

pub struct ReferenceNodeCodec;

Simple reference implementation of a NodeCodec.

Trait Implementations

impl Clone for ReferenceNodeCodec

fn clone(&self) -> ReferenceNodeCodec

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for ReferenceNodeCodec

fn default() -> ReferenceNodeCodec

Returns the "default value" for a type.

impl NodeCodec<KeccakHasher> for ReferenceNodeCodec

type Error = ReferenceError

Codec error type

fn hashed_null_node() -> <KeccakHasher as Hasher>::Out

Get the hashed null node.

fn decode(data: &[u8]) -> Result<Node, Self::Error>

Decode bytes to a Node. Returns Self::E on failure.

fn try_decode_hash(data: &[u8]) -> Option<<KeccakHasher as Hasher>::Out>

Decode bytes to the Hashers output type. Returns None on failure.

fn is_empty_node(data: &[u8]) -> bool

Check if the provided bytes correspond to the codecs "empty" node.

fn empty_node() -> Vec<u8>

Returns an empty node

fn leaf_node(partial: &[u8], value: &[u8]) -> Vec<u8>

Returns an encoded leaf node

fn ext_node(
    partial: &[u8],
    child: ChildReference<<KeccakHasher as Hasher>::Out>
) -> Vec<u8>

Returns an encoded extension node

fn branch_node<I>(children: I, maybe_value: Option<DBValue>) -> Vec<u8> where
    I: IntoIterator<Item = Option<ChildReference<<KeccakHasher as Hasher>::Out>>> + Iterator<Item = Option<ChildReference<<KeccakHasher as Hasher>::Out>>>, 

Returns an encoded branch node. Takes an iterator yielding ChildReference<H::Out> and an optional value