from __future__ import annotations

from typing import Dict


class PriceFeedAdapter:
    """Simple in-memory price feed adapter."""
    def __init__(self, prices: Dict[str, float] | None = None) -> None:
        self._prices = prices or {"AAPL": 150.0, "BTC": 60000.0, "USDC": 1.0}

    def get_prices(self) -> Dict[str, float]:
        return dict(self._prices)