Struct HashChain 

pub struct HashChain {
    pub chain: Vec<u64>,
}

A simple hash chain using a polynomial rolling hash as a stand-in for a cryptographic hash function.

h_0 = initial_value, h_{i+1} = hash(h_i || data_i)

WARNING

The polynomial hash used here is NOT a cryptographic hash function and provides no real security. This is a structural illustration only.

Fields

chain: Vec<u64>

The chain of hash values: chain[0] is genesis, chain[i+1] = hash(chain[i], data[i])

Implementations

impl HashChain

pub fn new(genesis: u64) -> Self

Create a new hash chain with a genesis value.

pub fn append(&mut self, data: u64)

Append a new block with the given data, extending the chain.

pub fn tip(&self) -> u64

Return the current tip (latest hash).

pub fn verify(&self, data: &[u64]) -> bool

Verify the chain is internally consistent. Returns true if all links are valid, assuming the provided data sequence.

Trait Implementations

impl Clone for HashChain

fn clone(&self) -> HashChain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HashChain

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

Formats the value using the given formatter.