Struct Hasher 

pub struct Hasher { /* private fields */ }

A streaming Poseidon2 hasher.

Supports three modes via domain separation:

• Plain hash (new)
• Keyed hash (new_keyed)
• Key derivation (new_derive_key)

Data is absorbed in 56-byte blocks (8 Goldilocks elements × 7 bytes each).

Implementations

impl Hasher

pub fn new() -> Self

Create a new hasher in plain hash mode.

pub fn new_keyed(key: &[u8; 64]) -> Self

Create a new hasher in keyed hash mode.

The key is absorbed as the first block (before any user data).

pub fn update(&mut self, data: &[u8]) -> &mut Self

Absorb input data into the sponge.

pub fn finalize(&self) -> Hash

Finalize and return the hash.

pub fn finalize_xof(&self) -> OutputReader

Finalize and return an extendable output reader (XOF mode).

Trait Implementations

impl Clone for Hasher

fn clone(&self) -> Hasher

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Hasher

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

Formats the value using the given formatter.

impl Default for Hasher

fn default() -> Self

Returns the “default value” for a type.