from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from db.models.service_signatures import ServiceSignature


async def get_active_signature_by_kid(session: AsyncSession, kid: str) -> ServiceSignature | None:
    stmt = select(ServiceSignature).where(ServiceSignature.kid == kid)
    r = await session.execute(stmt)

    return r.scalar_one_or_none()