• A placeholder strong-ish hash of the source bytes (FNV-1a, 32-bit). Stands in for a production digest (SHA-256); only the fixed slot matters to the format. Sufficient to demonstrate the mismatch → cold-scan handshake.

    Parameters

    • source: Uint8Array<ArrayBufferLike>

      The source bytes.

    Returns number

    A 32-bit unsigned hash.