"""Starter exchange gateway sandbox adapter."""

from typing import Dict, Any, List


def simulate_exchange_path(event: Dict[str, Any]) -> Dict[str, Any]:
    """Simulate an order path: orders -> fills with deterministic simple logic."""
    order_id = event.get("payload", {}).get("order_id", "ORD-1")
    return {
        "id": f"Fill-{order_id}",
        "type": "FillEvent",
        "timestamp": event.get("timestamp", 0.0) + 0.0005,
        "payload": {
            "order_id": order_id,
            "qty": 1,
            "price": event.get("payload", {}).get("price", 100.0),
        },
    }