from __future__ import annotations
from abc import ABC, abstractmethod
from typing import Any, Dict, List, Optional
class IBrokerage(ABC):
"""
Interface for brokerage services.
"""
@abstractmethod
def is_available(self) -> bool:
"""Check if API keys are configured and service is ready."""
pass
@abstractmethod
def place_order(self, symbol: str, side: str, qty: float, order_type: str = "market", price: Optional[float] = None) -> Dict[str, Any]:
"""Place an order."""
pass
@abstractmethod
def get_account_balance(self) -> Dict[str, float]:
"""Fetch account equity and cash."""
pass
@abstractmethod
def list_positions(self) -> List[Dict[str, Any]]:
"""List all open positions."""
pass
