Enum StorageHasher 

pub enum StorageHasher {
    Blake2_128,
    Blake2_256,
    Blake2_128Concat,
    Twox128,
    Twox256,
    Twox64Concat,
    Identity,
}

Hasher used by storage maps

Variants

Blake2_128

128-bit Blake2 hash.

Blake2_256

256-bit Blake2 hash.

Blake2_128Concat

Multiple 128-bit Blake2 hashes concatenated.

Twox128

128-bit XX hash.

Twox256

256-bit XX hash.

Twox64Concat

64-bit XX hashes concatentation.

Identity

Identity hashing (no hashing).

Implementations

impl StorageHasher

pub fn len_excluding_key(&self) -> usize

The hash produced by a StorageHasher can have these two components, in order:

1. A fixed size hash. (not present for StorageHasher::Identity).
2. The SCALE encoded key that was used as an input to the hasher (only present for StorageHasher::Twox64Concat, StorageHasher::Blake2_128Concat or StorageHasher::Identity).

This function returns the number of bytes used to represent the first of these.

pub fn ends_with_key(&self) -> bool

Returns true if the key used to produce the hash is appended to the hash itself.

Trait Implementations

impl Clone for StorageHasher

fn clone(&self) -> StorageHasher

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StorageHasher

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

Formats the value using the given formatter.

impl PartialEq for StorageHasher

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for StorageHasher

impl Eq for StorageHasher

impl StructuralPartialEq for StorageHasher