Struct LtHash 

pub struct LtHash { /* private fields */ }

An additive homomorphic hash function over crate::Blake3.

Implementations

impl LtHash

pub fn new() -> Self

Create a new LtHash instance with zero state.

pub fn add(&mut self, data: &[u8])

Add data.

The order of additions doesn’t matter. Each element is expanded to 1024 16-bit integers and added component-wise with modular arithmetic (mod 2^16).

pub fn subtract(&mut self, data: &[u8])

Subtract data.

This allows removing previously added data from the hash state. Uses 16-bit modular subtraction.

pub fn combine(&mut self, other: &Self)

Combine two LtHash states by addition.

pub fn checksum(&self) -> Digest

Return the Digest of the current state.

pub fn reset(&mut self)

Reset the LtHash to the initial zero state.

pub fn is_zero(&self) -> bool

Check if the LtHash is in the zero state.

Trait Implementations

impl Clone for LtHash

fn clone(&self) -> LtHash

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for LtHash

fn default() -> Self

Returns the “default value” for a type.

impl FixedSize for LtHash

const SIZE: usize = 2_048usize

The size of the encoded value (in bytes).

impl Read for LtHash

type Cfg = ()

The Cfg type parameter allows passing configuration during the read process. This is crucial for safely decoding untrusted data, for example, by providing size limits for collections or strings.

fn read_cfg(buf: &mut impl Buf, _: &()) -> Result<Self, CodecError>

Reads a value from the buffer using the provided configuration cfg.

impl Write for LtHash

fn write(&self, buf: &mut impl BufMut)

Writes the binary representation of self to the provided buffer buf.