import json
import time

from typing import Any, Dict

def now_ms() -> int:
    return int(time.time() * 1000)

def jd(obj: Dict[str, Any]) -> Dict[bytes, bytes]:
    """JSON to Redis fields."""
    return {"data": json.dumps(obj).encode("utf-8")}

def jl(fields: Dict[bytes, bytes]) -> Dict[str, Any]:
    """Redis fields to JSON."""
    return json.loads(fields[b"data"].decode("utf-8"))