Struct Hasher 

pub struct Hasher<const BODY_SIZE: usize = DEFAULT_BODY_SIZE> { /* private fields */ }

BMT hasher with configurable body size.

Implementations

impl<const BODY_SIZE: usize> Hasher<BODY_SIZE>

pub const fn new() -> Self

Create a new BMT hasher.

pub const fn set_span(&mut self, span: u64)

Set the span of data to be hashed

pub const fn span(&self) -> u64

Get the current span

pub fn prefix_with(&mut self, prefix: &[u8])

Add a prefix to the hash calculation

pub fn prefix(&self) -> &[u8]

Get the current prefix

pub const fn position(&self) -> usize

Get the current cursor position

pub const fn len(&self) -> usize

Get the amount of data currently in the buffer

pub const fn is_empty(&self) -> bool

Check if the buffer is empty

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

Update the hasher with more data (non-destructive)

pub fn hash(&self, out: &mut [u8])

Compute the BMT hash and write to output buffer.

pub fn sum(&self) -> B256

Compute the BMT hash and return the result (non-destructive)

pub fn data(&self) -> Bytes

Get the current data as Bytes (immutable reference)

pub fn get_level_segments(&self, data: &[u8]) -> Vec<B256>

Get segments for the current level of data

Trait Implementations

impl<const BODY_SIZE: usize> Clone for Hasher<BODY_SIZE>

fn clone(&self) -> Hasher<BODY_SIZE>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const BODY_SIZE: usize> Debug for Hasher<BODY_SIZE>

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

Formats the value using the given formatter.

impl<const BODY_SIZE: usize> Default for Hasher<BODY_SIZE>

fn default() -> Self

Returns the “default value” for a type.

impl<const BODY_SIZE: usize> FixedOutput for Hasher<BODY_SIZE>

fn finalize_into(self, out: &mut Array<u8, Self::OutputSize>)

Consume value and write result into provided array.

fn finalize_fixed(self) -> Array<u8, Self::OutputSize>

Retrieve result and consume the hasher instance.

impl<const BODY_SIZE: usize> FixedOutputReset for Hasher<BODY_SIZE>

fn finalize_into_reset(&mut self, out: &mut Array<u8, Self::OutputSize>)

Write result into provided array and reset the hasher state.

fn finalize_fixed_reset(&mut self) -> Array<u8, Self::OutputSize>

Retrieve result and reset the hasher state.

impl<const BODY_SIZE: usize> HashMarker for Hasher<BODY_SIZE>

impl<const BODY_SIZE: usize> OutputSizeUser for Hasher<BODY_SIZE>

type OutputSize = UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>

Size of the output in bytes.

fn output_size() -> usize

Return output size in bytes.

impl Prover for Hasher

fn generate_proof(&self, data: &[u8], segment_index: usize) -> Result<Proof>

Generate a proof for a specific segment

fn verify_proof(proof: &Proof, root_hash: &[u8]) -> Result<bool>

Verify a proof against a root hash

impl<const BODY_SIZE: usize> Reset for Hasher<BODY_SIZE>

fn reset(&mut self)

Reset state to its initial value.

impl<const BODY_SIZE: usize> Update for Hasher<BODY_SIZE>

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

Update state using the provided data.

fn chain(self, data: impl AsRef<[u8]>) -> Self

where Self: Sized,

Digest input data in a chained manner.

impl<const BODY_SIZE: usize> Write for Hasher<BODY_SIZE>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.