"""RFC 8785 canonical JSON hashing shared by persisted records."""

from hashlib import sha256

import rfc8785

from app.domain.domain_errors import DomainError


def canonical(value: object) -> bytes:
    try:
        return rfc8785.dumps(value)
    except rfc8785.CanonicalizationError as exc:
        raise DomainError("SCHEMA_INVALID", "Content is not canonicalizable JSON") from exc


def digest(value: object) -> str:
    return "sha256:" + sha256(canonical(value)).hexdigest()