Struct multiproof_rs::keys::nibble_key::NibbleKey

pub struct NibbleKey(_);

Represents a key whose unit is nibbles, i.e. 4-byte long values.

Internally, nibbles are stored in a byte array, with each byte having its most significant nibble set to 0.

Methods

impl NibbleKey

pub fn factor_length(&self, other: &Self) -> usize

Finds the length of the common prefix of two keys.

pub fn with_hex_prefix(&self, is_terminator: bool) -> Vec<u8>

Encodes a nibble key to its hex prefix. The output is byte-encoded, so as to be stored immediately.

pub fn remove_hex_prefix(payload: &[u8]) -> NibbleKey

Rebuilds the hex prefix from a &[u8] slice assumed to be hex prefix-encoded.

Trait Implementations

impl Clone for NibbleKey

fn clone(&self) -> NibbleKey

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NibbleKey

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Encodable for NibbleKey

fn rlp_append(&self, s: &mut RlpStream)

Append a value to the stream

fn rlp_bytes(&self) -> Vec<u8>

Get rlp-encoded bytes for this instance

impl<'_> From<&'_ [u8]> for NibbleKey

fn from(nibbles: &[u8]) -> Self

Performs the conversion.

impl From<ByteKey> for NibbleKey

fn from(address: ByteKey) -> Self

Performs the conversion.

impl From<NibbleKey> for ByteKey

fn from(key: NibbleKey) -> Self

Performs the conversion.

impl From<Vec<u8>> for NibbleKey

fn from(nibbles: Vec<u8>) -> Self

Performs the conversion.

impl<'_> Index<&'_ NibbleKey> for Node

type Output = Node

The returned type after indexing.

fn index(&self, k: &NibbleKey) -> &Node

Performs the indexing (container[index]) operation.

impl Index<RangeFrom<usize>> for NibbleKey

type Output = [u8]

The returned type after indexing.

fn index(&self, r: RangeFrom<usize>) -> &[u8]

Performs the indexing (container[index]) operation.

impl Index<RangeTo<usize>> for NibbleKey

type Output = [u8]

The returned type after indexing.

fn index(&self, r: RangeTo<usize>) -> &[u8]

Performs the indexing (container[index]) operation.

impl Index<usize> for NibbleKey

type Output = u8

The returned type after indexing.

fn index(&self, i: usize) -> &u8

Performs the indexing (container[index]) operation.

impl Into<Vec<u8>> for NibbleKey

fn into(self) -> Vec<u8>

Performs the conversion.

impl Key<u8> for NibbleKey

fn tail(&self) -> Self

Returns a copy of the current key, in which the first unit (i.e. byte, bit, nibble) has been removed. Note that the tail of an empty list is another empty list.

fn len(&self) -> usize

Returns the number of units (i.e. bit, nibble or byte)

fn is_empty(&self) -> bool

Returns true if the key is zero unit long.

impl PartialEq<NibbleKey> for NibbleKey

fn eq(&self, other: &NibbleKey) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &NibbleKey) -> bool

This method tests for !=.

impl StructuralPartialEq for NibbleKey