Enum Hasher 

pub enum Hasher {
    CidRaw {
        hasher: Sha256,
    },
    DagPb {
        buffer: Vec<u8>,
        leaves: Vec<DagNode>,
        raw_leaves: bool,
    },
}

A streaming hasher that accumulates data and produces a Cid on finalization.

Variants

CidRaw

CIDv1 with the raw codec: the whole input is one raw block.

Fields

hasher: Sha256

DagPb

dag-pb DAG (CIDv0 wrapped leaves, or CIDv1 with raw leaves).

Fields

buffer: Vec<u8>

leaves: Vec<DagNode>

raw_leaves: bool

Implementations

impl Hasher

pub fn for_ipfs() -> Self

Creates a hasher for IPFS CIDv0 dag-pb (wrapped leaves, balanced DAG).

pub fn for_ipfs_v1_raw_leaves() -> Self

Creates a hasher for IPFS CIDv1 dag-pb with raw leaves.

Matches kubo’s ipfs add --cid-version=1 --raw-leaves defaults: chunks of 256 KiB are stored as raw blocks (codec 0x55) and the file root (if the file spans multiple chunks) is a dag-pb node linking those raw leaves. A single-chunk file collapses to a bare raw block whose CID is bafkrei….

pub fn for_expected(expected: &Cid) -> Result<Self, UnsupportedCid>

Creates a hasher that reproduces the construction of the given CID: dag-pb with wrapped leaves for CIDv0, a single raw block for CIDv1 raw, dag-pb with raw leaves for CIDv1 dag-pb.

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

Feed data into the hasher.

pub fn finalize(self) -> Cid

Finalize the hasher and return the computed Cid.

Trait Implementations

impl Debug for Hasher

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

Formats the value using the given formatter.