Trait 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 Constants

const METADATA: StorageHasherIR

Required Associated Types

type Output: AsRef<[u8]>

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.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

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>

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>

impl StorageHasher for Twox64Concat

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

type Output = Vec<u8>

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]