from typing import Any, Optional
from datetime import datetime


def build_envelope(
    data: Any,
    trace_id: str,
    code: str = "0",
    message: str = "ok",
    details: Optional[dict] = None,
) -> dict:
    payload = {
        "code": code,
        "message": message,
        "data": data,
        "traceId": trace_id,
        "ts": int(datetime.utcnow().timestamp() * 1000),
    }
    if details is not None:
        payload["details"] = details
    return payload