Module hash 

BLAKE3 hashing helpers.

A Hash is a fixed 32-byte digest. The canonical hex form is 64 lowercase characters. Object-store paths split the digest into a first-byte directory and 62-char file-name (see SPEC-OBJECTS.md §10).

Structs

Hasher

Incremental BLAKE3 hasher for streaming data.

ObjectPath

Object-store path split: <first-byte-hex>/<remaining-62-hex>.

Enums

FromHexError

Errors returned by from_hex.

Constants

HASH_LEN

Length, in bytes, of a BLAKE3 digest used throughout mkit.

HEX_LEN

Length of the lowercase-hex encoding of a Hash.

ZERO

The all-zero digest. Used as the “absent” sentinel for optional annotation fields on commit objects (message_hash, content_digest).

Functions

domain_digest

Domain-separated BLAKE3 digest.

from_hex

Parse a lowercase-or-uppercase 64-char hex string into a Hash. Rejects any non-hex byte.

hash

Hash arbitrary bytes in one shot.

object_path

Split a Hash into its object-store path components.

to_hex

Render a Hash as lowercase hex.

to_hex_bytes

Render a byte slice as lowercase hex. format!-with-{:02x} allocates per byte; the hand-roll here is the workspace’s canonical hex encoder. Use this everywhere a byte slice needs hex rendering.

Type Aliases

Hash

Fixed-size BLAKE3 digest. Copy because it is tiny and cheap.