import hashlib


def hash_secret(*data) -> bytes:
    """A custom HMAC that securily combines and hashes the given data (context, secrets). The first argument should be a namespacing string."""
    inner = bytearray(len(data).to_bytes(8, "big"))
    for d in data:
        if isinstance(d, str):
            d = d.encode()
        inner += hashlib.sha256(d).digest()
    return hashlib.sha256(inner).digest()[:12]