Trait frame_support::StorageHasher

pub trait StorageHasher: 'static {
    type Output: AsRef<[u8]>;

    const METADATA: StorageHasherIR;

    // Required methods
    fn hash(x: &[u8]) -> Self::Output;
    fn max_len<K: MaxEncodedLen>() -> usize;
}

Hasher to use to hash keys to insert to storage.

Required Associated Types

type Output: AsRef<[u8]>

Required Associated Constants

const METADATA: StorageHasherIR

Required Methods

fn hash(x: &[u8]) -> Self::Output

fn max_len<K: MaxEncodedLen>() -> usize

The max length of the final hash, for the given key type.

Implementors

impl StorageHasher for Blake2_128

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Blake2_128

type Output = [u8; 16]

impl StorageHasher for Blake2_128Concat

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Blake2_128Concat

type Output = Vec<u8, Global>

impl StorageHasher for Blake2_256

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Blake2_256

type Output = [u8; 32]

impl StorageHasher for Identity

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Identity

type Output = Vec<u8, Global>

impl StorageHasher for Twox64Concat

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Twox64Concat

type Output = Vec<u8, Global>

impl StorageHasher for Twox128

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Twox128

type Output = [u8; 16]

impl StorageHasher for Twox256

const METADATA: StorageHasherIR = metadata_ir::StorageHasherIR::Twox256

type Output = [u8; 32]