Struct CryptoStableHasher 

pub struct CryptoStableHasher { /* private fields */ }

Based on https://crypto.stackexchange.com/a/54546

The idea here is to use the FieldAddress to unambiguously identify each field as within it’s own database cell, and use an online order-independent aggregator of the cells to produce a final result.

Within this framework a huge struct can be hashed incrementally or even in parallel as long as field addresses are deterministically produced to uniquely identify parts within the struct. Conveniently, the FieldAddress::skip method can be used to jump to parts of a vec or struct efficiently.

Trait Implementations

impl Clone for CryptoStableHasher

fn clone(&self) -> CryptoStableHasher

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CryptoStableHasher

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

Formats the value using the given formatter.

impl Default for CryptoStableHasher

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for CryptoStableHasher

fn eq(&self, other: &CryptoStableHasher) -> 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 StableHasher for CryptoStableHasher

fn from_bytes(bytes: Vec<u8>) -> Self

Panics if the bytes are not in a valid format. The only valid values are values returned from to_bytes()

type Out = [u8; 32]

The type of value returned when finishing

type Addr = CryptoAddress

The type used when identifying where a value is located in a struct

type Bytes = Vec<u8>

Used when serializing

fn new() -> Self

Create an empty hasher

fn write(&mut self, field_address: Self::Addr, bytes: &[u8])

Add a single field to the hash

fn mixin(&mut self, other: &Self)

Adds all fields from another hasher

fn unmix(&mut self, other: &Self)

Removes all fields from another hasher

fn finish(&self) -> Self::Out

Finalize the digest

fn to_bytes(&self) -> Self::Bytes

Serialize

impl Eq for CryptoStableHasher

impl StructuralPartialEq for CryptoStableHasher