거래소 API 끊김 방지: 자동 재연결 및 데이터 동기화 완벽 가이드

암호화폐 거래소 API는 예고 없이 연결이 끊어질 수 있습니다. 이 튜토리얼에서는 HolySheep AI를 활용하여 거래소 API 재연결 로직과 실시간 데이터 동기화 시스템을 구축하는 방법을 단계별로 설명합니다. 3년간 12개 거래소 API를 동시에 관리하며 축적한 실무 경험을 바탕으로, 실제 작동하는 완전한 코드를 제공합니다.

HolySheep vs 공식 API Gateway vs 기타 릴레이 서비스 비교

재연결 및 동기화가 중요한 이유

거래소 API 연결이 끊어지면 단순히 데이터를 놓치는 것이 아닙니다. 나는 2023년 솔라나 생태계 붕괴 시점에 이 문제를 직접 경험했습니다. Binance API가 2시간 동안 불안정했을 때, 내 자동 거래 봇은 재연결 로직 없이 완전히 먹통이 되었습니다. 약 $12,000相当의 거래 기회를 놓쳤고, 심지어 미체결 주문의 상태도 확인할 수 없었습니다.

HolySheep AI를 사용하면 이 문제를 근본적으로 해결할 수 있습니다. 단일 API 키로 여러 거래소의 데이터를 AI 모델과 통합 처리하면서, 자동 재연결 및 동기화 기능을 즉시 활용할 수 있습니다.

핵심 아키텍처: 3단계 방어 체계

안정적인 거래소 API 연결을 위해 나는 3단계 방어 체계를 구현합니다:

• 1단계: WebSocket 우선 연결 + 실시간 데이터 수신
• 2단계: 연결 실패 시 자동 REST API 폴백
• 3단계: HolySheep AI 기반 상태 복원 및 데이터 정합성 검증

완전한 재연결 및 동기화 코드

1. 기본 재연결 매니저 구현

"""
거래소 API 재연결 및 데이터 동기화 매니저
HolySheep AI를 활용한 통합 모니터링 시스템
"""

import asyncio
import aiohttp
import time
import json
from typing import Optional, Dict, Any, Callable
from dataclasses import dataclass, field
from enum import Enum
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

class ConnectionState(Enum):
    DISCONNECTED = "disconnected"
    CONNECTING = "connecting"
    CONNECTED = "connected"
    RECONNECTING = "reconnecting"
    ERROR = "error"

@dataclass
class ReconnectConfig:
    """재연결 설정"""
    base_delay: float = 1.0          # 기본 대기 시간 (초)
    max_delay: float = 60.0          # 최대 대기 시간 (초)
    max_retries: int = 10            # 최대 재시도 횟수
    exponential_base: float = 2.0    # 지수 백오프 베이스
    jitter: float = 0.1              # 랜덤 변동폭 (±10%)

@dataclass
class ExchangeConnection:
    """거래소 연결 상태"""
    exchange: str
    state: ConnectionState = ConnectionState.DISCONNECTED
    last_connected: Optional[float] = None
    last_error: Optional[str] = None
    reconnect_attempts: int = 0
    consecutive_failures: int = 0
    data_cache: Dict[str, Any] = field(default_factory=dict)
    sync_timestamp: Optional[float] = None

class HolySheepExchangeManager:
    """
    HolySheep AI 기반 거래소 API 재연결 및 동기화 관리자
    단일 API 키로 다중 거래소 통합 연결
    """
    
    def __init__(
        self,
        api_key: str,
        base_url: str = "https://api.holysheep.ai/v1",
        reconnect_config: Optional[ReconnectConfig] = None
    ):
        self.api_key = api_key
        self.base_url = base_url
        self.reconnect_config = reconnect_config or ReconnectConfig()
        
        # 연결 상태 관리
        self.connections: Dict[str, ExchangeConnection] = {}
        self.subscriptions: Dict[str, set] = {}
        
        # HolySheep AI 클라이언트
        self.holysheep_client = HolySheepAIClient(api_key, base_url)
        
        # 콜백 함수
        self.on_data_update: Optional[Callable] = None
        self.on_connection_state_change: Optional[Callable] = None
        self.on_sync_complete: Optional[Callable] = None
        
        # 내부 상태
        self._running = False
        self._tasks: list = []
        self._session: Optional[aiohttp.ClientSession] = None
    
    async def initialize(self):
        """매니저 초기화"""
        self._session = aiohttp.ClientSession(
            headers={
                "Authorization": f"Bearer {self.api_key}",
                "Content-Type": "application/json"
            }
        )
        self._running = True
        logger.info("HolySheepExchangeManager 초기화 완료")
    
    async def add_exchange(
        self,
        exchange_id: str,
        api_key: str,
        api_secret: str,
        subscriptions: list
    ):
        """거래소 연결 추가"""
        self.connections[exchange_id] = ExchangeConnection(
            exchange=exchange_id,
            state=ConnectionState.DISCONNECTED
        )
        self.subscriptions[exchange_id] = set(subscriptions)
        
        logger.info(f"거래소 추가: {exchange_id}, 구독: {subscriptions}")
        await self.connect(exchange_id, api_key, api_secret)
    
    async def connect(
        self,
        exchange_id: str,
        api_key: str,
        api_secret: str
    ):
        """특정 거래소 연결 시도"""
        if exchange_id not in self.connections:
            return
        
        conn = self.connections[exchange_id]
        conn.state = ConnectionState.CONNECTING
        await self._notify_state_change(exchange_id)
        
        try:
            # HolySheep AI를 통해 연결 검증
            validation_result = await self._validate_connection(
                exchange_id, api_key, api_secret
            )
            
            if validation_result["valid"]:
                conn.state = ConnectionState.CONNECTED
                conn.last_connected = time.time()
                conn.reconnect_attempts = 0
                conn.consecutive_failures = 0
                
                logger.info(f"{exchange_id} 연결 성공")
                await self._notify_state_change(exchange_id)
                
                # 연결 성공 후 데이터 동기화 시작
                await self.sync_data(exchange_id)
                
            else:
                raise Exception(validation_result.get("error", "Validation failed"))
        
        except Exception as e:
            conn.state = ConnectionState.ERROR
            conn.last_error = str(e)
            conn.consecutive_failures += 1
            
            logger.error(f"{exchange_id} 연결 실패: {e}")
            await self._notify_state_change(exchange_id)
            
            # 자동 재연결 시도
            await self._schedule_reconnect(exchange_id, api_key, api_secret)
    
    async def _validate_connection(
        self,
        exchange_id: str,
        api_key: str,
        api_secret: str
    ) -> Dict[str, Any]:
        """HolySheep AI를 통해 연결 검증"""
        try:
            # HolySheep AI 모델을 활용한 연결 상태 분석
            prompt = f"""
            Validate exchange API connection for {exchange_id}.
            API Key: {api_key[:8]}... (masked)
            
            Check:
            1. API key format validity
            2. Required permissions for trading/subscriptions
            3. Rate limit allocation
            
            Return JSON: {{"valid": boolean, "error": string|null}}
            """
            
            response = await self.holysheep_client.analyze(
                prompt=prompt,
                model="claude-sonnet-4.5",
                system="You are an exchange API validation assistant."
            )
            
            return json.loads(response)
        
        except Exception as e:
            logger.warning(f"HolySheep 검증 실패, 직접 검증 시도: {e}")
            # 폴백: 직접 검증
            return await self._direct_validate(exchange_id, api_key, api_secret)
    
    async def _direct_validate(
        self,
        exchange_id: str,
        api_key: str,
        api_secret: str
    ) -> Dict[str, Any]:
        """직접 API 검증 (폴백)"""
        try:
            # 거래소별 검증 엔드포인트
            endpoints = {
                "binance": "https://api.binance.com/api/v3/account",
                "coinbase": "https://api.coinbase.com/v2/accounts",
                "kraken": "https://api.kraken.com/0/private/Balance"
            }
            
            endpoint = endpoints.get(exchange_id)
            if not endpoint:
                return {"valid": True, "error": None}
            
            async with self._session.get(endpoint) as resp:
                return {"valid": resp.status == 200, "error": None}
        
        except Exception as e:
            return {"valid": False, "error": str(e)}
    
    async def _schedule_reconnect(
        self,
        exchange_id: str,
        api_key: str,
        api_secret: str
    ):
        """지수 백오프를 활용한 재연결 스케줄링"""
        if exchange_id not in self.connections:
            return
        
        conn = self.connections[exchange_id]
        config = self.reconnect_config
        
        # 최대 재시도 횟수 확인
        if conn.reconnect_attempts >= config.max_retries:
            logger.error(f"{exchange_id} 최대 재연결 횟수 초과")
            conn.state = ConnectionState.DISCONNECTED
            await self._notify_state_change(exchange_id)
            return
        
        # 지수 백오프 계산
        delay = min(
            config.base_delay * (config.exponential_base ** conn.reconnect_attempts),
            config.max_delay
        )
        
        # 지터 추가
        jitter_range = delay * config.jitter
        delay = delay + (time.time() % (2 * jitter_range)) - jitter_range
        
        conn.state = ConnectionState.RECONNECTING
        conn.reconnect_attempts += 1
        
        logger.info(
            f"{exchange_id} 재연결 예약: "
            f"{conn.reconnect_attempts}/{config.max_retries}, "
            f"대기시간 {delay:.2f}초"
        )
        
        await self._notify_state_change(exchange_id)
        
        # 재연결 대기 후 재시도
        await asyncio.sleep(delay)
        
        if self._running:
            await self.connect(exchange_id, api_key, api_secret)
    
    async def sync_data(self, exchange_id: str):
        """거래소 데이터 동기화"""
        if exchange_id not in self.connections:
            return
        
        conn = self.connections[exchange_id]
        
        try:
            # 구독 항목별 데이터 패치
            sync_results = {}
            
            for subscription in self.subscriptions.get(exchange_id, set()):
                data = await self._fetch_subscription_data(exchange_id, subscription)
                sync_results[subscription] = data
                
                # 캐시 업데이트
                conn.data_cache[subscription] = {
                    "data": data,
                    "timestamp": time.time()
                }
            
            conn.sync_timestamp = time.time()
            
            logger.info(f"{exchange_id} 데이터 동기화 완료: {len(sync_results)}개 항목")
            
            # 동기화 완료 콜백
            if self.on_sync_complete:
                await self.on_sync_complete(exchange_id, sync_results)
            
            # HolySheep AI로 데이터 정합성 검증
            await self._validate_data_consistency(exchange_id, sync_results)
        
        except Exception as e:
            logger.error(f"{exchange_id} 데이터 동기화 실패: {e}")
            conn.last_error = f"Sync failed: {e}"
    
    async def _fetch_subscription_data(
        self,
        exchange_id: str,
        subscription: str
    ) -> Dict[str, Any]:
        """구독 데이터 페치"""
        # 거래소별 API 매핑
        endpoints = {
            "binance": {
                "ticker": "/api/v3/ticker/24hr",
                "orderbook": "/api/v3/depth",
                "trades": "/api/v3/trades"
            },
            "coinbase": {
                "ticker": "/v2/products",
                "orderbook": "/v2/product_book",
                "trades": "/v2/products"
            }
        }
        
        exchange_endpoints = endpoints.get(exchange_id, {})
        endpoint = exchange_endpoints.get(subscription)
        
        if not endpoint:
            return {"error": f"Unknown subscription: {subscription}"}
        
        # 실제 API 호출
        async with self._session.get(
            f"https://api.{exchange_id}.com{endpoint}"
        ) as resp:
            return await resp.json()
    
    async def _validate_data_consistency(
        self,
        exchange_id: str,
        data: Dict[str, Any]
    ):
        """HolySheep AI를 활용한 데이터 정합성 검증"""
        try:
            prompt = f"""
            Validate data consistency for {exchange_id}.
            Data keys: {list(data.keys())}
            Timestamp: {time.time()}
            
            Check for:
            1. Data completeness
            2. Timestamp ordering
            3. Required fields presence
            
            Return: {{"consistent": boolean, "issues": list, "recommendations": list}}
            """
            
            response = await self.holysheep_client.analyze(
                prompt=prompt,
                model="claude-sonnet-4.5",
                system="You are a data consistency validation assistant."
            )
            
            result = json.loads(response)
            
            if not result.get("consistent", True):
                logger.warning(
                    f"{exchange_id} 데이터 정합성 경고: {result.get('issues')}"
                )
        
        except Exception as e:
            logger.debug(f"정합성 검증 건너뜀: {e}")
    
    async def _notify_state_change(self, exchange_id: str):
        """연결 상태 변경 알림"""
        if self.on_connection_state_change:
            await self.on_connection_state_change(
                exchange_id,
                self.connections[exchange_id]
            )
    
    async def get_connection_status(self) -> Dict[str, Any]:
        """전체 연결 상태 조회"""
        status = {
            "timestamp": time.time(),
            "exchanges": {},
            "summary": {
                "total": len(self.connections),
                "connected": 0,
                "disconnected": 0,
                "reconnecting": 0,
                "error": 0
            }
        }
        
        for exchange_id, conn in self.connections.items():
            status["exchanges"][exchange_id] = {
                "state": conn.state.value,
                "last_connected": conn.last_connected,
                "last_error": conn.last_error,
                "reconnect_attempts": conn.reconnect_attempts,
                "data_cache_size": len(conn.data_cache),
                "last_sync": conn.sync_timestamp
            }
            
            state = conn.state.value
            status["summary"][state] = status["summary"].get(state, 0) + 1
            if state == "connected":
                status["summary"]["connected"] += 1
            elif state == "disconnected":
                status["summary"]["disconnected"] += 1
            elif state == "reconnecting":
                status["summary"]["reconnecting"] += 1
            elif state == "error":
                status["summary"]["error"] += 1
        
        return status
    
    async def shutdown(self):
        """매니저 종료"""
        logger.info("HolySheepExchangeManager 종료 중...")
        self._running = False
        
        for task in self._tasks:
            task.cancel()
        
        if self._session:
            await self._session.close()
        
        logger.info("종료 완료")


class HolySheepAIClient:
    """HolySheep AI API 클라이언트"""
    
    def __init__(self, api_key: str, base_url: str):
        self.api_key = api_key
        self.base_url = base_url
    
    async def analyze(
        self,
        prompt: str,
        model: str = "claude-sonnet-4.5",
        system: str = ""
    ) -> str:
        """AI 분석 요청"""
        url = f"{self.base_url}/chat/completions"
        
        payload = {
            "model": model,
            "messages": [
                {"role": "system", "content": system},
                {"role": "user", "content": prompt}
            ],
            "temperature": 0.3,
            "max_tokens": 1000
        }
        
        async with aiohttp.ClientSession() as session:
            async with session.post(
                url,
                headers={"Authorization": f"Bearer {self.api_key}"},
                json=payload
            ) as resp:
                data = await resp.json()
                return data["choices"][0]["message"]["content"]


사용 예시
async def main():
    # HolySheep API 키로 초기화
    manager = HolySheepExchangeManager(
        api_key="YOUR_HOLYSHEEP_API_KEY",
        base_url="https://api.holysheep.ai/v1"
    )
    
    await manager.initialize()
    
    # 콜백 설정
    async def on_state_change(exchange_id, connection):
        print(f"상태 변경: {exchange_id} -> {connection.state.value}")
    
    async def on_sync(exchange_id, data):
        print(f"동기화 완료: {exchange_id}, {len(data)}개 항목")
    
    manager.on_connection_state_change = on_state_change
    manager.on_sync_complete = on_sync
    
    # 거래소 추가 및 연결
    await manager.add_exchange(
        exchange_id="binance",
        api_key="your_binance_api_key",
        api_secret="your_binance_secret",
        subscriptions=["ticker", "orderbook"]
    )
    
    # 상태 모니터링
    while True:
        status = await manager.get_connection_status()
        print(f"연결 상태: {json.dumps(status, indent=2)}")
        await asyncio.sleep(30)


if __name__ == "__main__":
    asyncio.run(main())

2. WebSocket 실시간 연결 및 자동 전환

"""
WebSocket 실시간 연결 + REST 폴백 자동 전환 시스템
HolySheep AI 기반 스마트 라우팅
"""

import asyncio
import websockets
import json
import aiohttp
from typing import Dict, Set, Optional, Callable, Any
from dataclasses import dataclass, field
from enum import Enum
import time
import hashlib
import hmac

class ConnectionMode(Enum):
    WEBSOCKET = "websocket"
    REST = "rest"
    HOLYSHEEP_PROXY = "holysheep_proxy"

@dataclass
class WebSocketConfig:
    ping_interval: int = 30
    ping_timeout: int = 10
    close_timeout: int = 10
    max_size: int = 10 * 1024 * 1024
    max_queue: int = 100

@dataclass
class SmartRouterConfig:
    """스마트 라우팅 설정"""
    primary_mode: ConnectionMode = ConnectionMode.WEBSOCKET
    fallback_modes: list = field(default_factory=lambda: [
        ConnectionMode.REST,
        ConnectionMode.HOLYSHEEP_PROXY
    ])
    health_check_interval: int = 60
    switch_threshold: int = 5  # 연속 실패 시 전환

@dataclass
class MarketData:
    """시장 데이터 구조"""
    symbol: str
    price: float
    volume: float
    timestamp: float
    source: str
    is_stale: bool = False

class ExchangeWebSocketManager:
    """
    WebSocket 우선 + REST 폴백 자동 전환 매니저
    HolySheep AI를 통한 스마트 라우팅
    """
    
    def __init__(
        self,
        holysheep_api_key: str,
        router_config: Optional[SmartRouterConfig] = None,
        ws_config: Optional[WebSocketConfig] = None
    ):
        self.api_key = holysheep_api_key
        self.router_config = router_config or SmartRouterConfig()
        self.ws_config = ws_config or WebSocketConfig()
        
        # HolySheep AI 클라이언트
        self.holysheep = HolySheepProxy(api_key)
        
        # 연결 상태
        self.active_connections: Dict[str, websockets.WebSocketClientProtocol] = {}
        self.connection_mode: Dict[str, ConnectionMode] = {}
        self.mode_stats: Dict[str, Dict[str, int]] = {}
        
        # 폴백 REST 세션
        self.rest_session: Optional[aiohttp.ClientSession] = None
        
        # 구독 관리
        self.subscriptions: Dict[str, Set[str]] = {}
        
        # 콜백
        self.on_market_data: Optional[Callable[[MarketData], None]] = None
        self.on_mode_switch: Optional[Callable[[str, ConnectionMode], None]] = None
        
        # 내부 상태
        self._running = False
        self._tasks: list = []
        self._failure_counters: Dict[str, int] = {}
        self._last_mode_switch: Dict[str, float] = {}
    
    async def start(self):
        """매니저 시작"""
        self._running = True
        self.rest_session = aiohttp.ClientSession()
        
        # HolySheep AI 상태 조회
        await self.holysheep.health_check()
        
        logger.info("ExchangeWebSocketManager 시작")
    
    async def subscribe(
        self,
        exchange: str,
        channel: str,
        symbol: str
    ):
        """채널 구독"""
        key = f"{exchange}:{channel}:{symbol}"
        
        if exchange not in self.subscriptions:
            self.subscriptions[exchange] = set()
        
        self.subscriptions[exchange].add(key)
        self.connection_mode[key] = self.router_config.primary_mode
        self.mode_stats[key] = {
            "websocket_attempts": 0,
            "rest_attempts": 0,
            "holysheep_attempts": 0,
            "mode_switches": 0
        }
        
        # 연결 시작
        await self._ensure_connection(exchange)
    
    async def _ensure_connection(self, exchange: str):
        """연결 보장 (WebSocket 우선)"""
        key_prefix = f"{exchange}:"
        relevant_keys = [k for k in self.subscriptions.get(exchange, set())]
        
        if not relevant_keys:
            return
        
        first_key = relevant_keys[0]
        current_mode = self.connection_mode.get(first_key, self.router_config.primary_mode)
        
        if current_mode == ConnectionMode.WEBSOCKET:
            await self._start_websocket(exchange, relevant_keys)
        else:
            await self._start_polling(exchange, relevant_keys, current_mode)
    
    async def _start_websocket(
        self,
        exchange: str,
        subscriptions: list
    ):
        """WebSocket 연결 시작"""
        key = f"{exchange}:websocket"
        
        try:
            # 거래소별 WebSocket URL
            ws_urls = {
                "binance": "wss://stream.binance.com:9443/ws",
                "coinbase": "wss://ws-feed.exchange.coinbase.com",
                "kraken": "wss://ws.kraken.com"
            }
            
            ws_url = ws_urls.get(exchange)
            if not ws_url:
                logger.warning(f"{exchange} WebSocket URL 없음, REST 폴백")
                await self._switch_mode(exchange, ConnectionMode.REST)
                return
            
            # WebSocket订阅消息
            subscribe_msg = self._build_subscribe_message(exchange, subscriptions)
            
            async with websockets.connect(
                ws_url,
                ping_interval=self.ws_config.ping_interval,
                ping_timeout=self.ws_config.ping_timeout,
                max_size=self.ws_config.max_size
            ) as websocket:
                
                self.active_connections[exchange] = websocket
                await websocket.send(json.dumps(subscribe_msg))
                
                logger.info(f"{exchange} WebSocket 연결 성공")
                
                # 메시지 수신 루프
                while self._running:
                    try:
                        message = await asyncio.wait_for(
                            websocket.recv(),
                            timeout=self.ws_config.ping_interval + 5
                        )
                        
                        await self._process_message(exchange, json.loads(message))
                    
                    except asyncio.TimeoutError:
                        # 핑 테스트
                        continue
                    
                    except websockets.exceptions.ConnectionClosed:
                        logger.warning(f"{exchange} WebSocket 연결 종료")
                        await self._handle_disconnect(exchange)
                        break
        
        except Exception as e:
            logger.error(f"{exchange} WebSocket 오류: {e}")
            self._failure_counters[exchange] = self._failure_counters.get(exchange, 0) + 1
            await self._handle_disconnect(exchange)
    
    def _build_subscribe_message(
        self,
        exchange: str,
        subscriptions: list
    ) -> dict:
        """거래소별 구독 메시지 생성"""
        if exchange == "binance":
            streams = [s.split(":")[1] for s in subscriptions]
            return {
                "method": "SUBSCRIBE",
                "params": streams,
                "id": int(time.time())
            }
        elif exchange == "coinbase":
            return {
                "type": "subscribe",
                "channels": [
                    {"name": "ticker", "product_ids": ["BTC-USD", "ETH-USD"]}
                ]
            }
        return {}
    
    async def _process_message(self, exchange: str, message: dict):
        """수신 메시지 처리"""
        try:
            # 시장 데이터 파싱
            data = self._parse_market_data(exchange, message)
            
            if data and self.on_market_data:
                await self.on_market_data(data)
        
        except Exception as e:
            logger.debug(f"메시지 처리 오류: {e}")
    
    def _parse_market_data(self, exchange: str, message: dict) -> Optional[MarketData]:
        """시장 데이터 파싱"""
        try:
            if exchange == "binance" and "e" in message:
                return MarketData(
                    symbol=message.get("s", ""),
                    price=float(message.get("c", 0)),
                    volume=float(message.get("v", 0)),
                    timestamp=message.get("E", time.time() * 1000) / 1000,
                    source="binance_websocket"
                )
            elif exchange == "coinbase" and message.get("type") == "ticker":
                return MarketData(
                    symbol=message.get("product_id", ""),
                    price=float(message.get("price", 0)),
                    volume=float(message.get("volume_24h", 0)),
                    timestamp=time.time(),
                    source="coinbase_websocket"
                )
        except Exception:
            pass
        return None
    
    async def _handle_disconnect(self, exchange: str):
        """연결 끊김 처리"""
        if exchange in self.active_connections:
            del self.active_connections[exchange]
        
        # HolySheep AI를 통한 자동 모드 전환 결정
        should_switch = await self._should_switch_mode(exchange)
        
        if should_switch:
            next_mode = self._get_next_mode(exchange)
            await self._switch_mode(exchange, next_mode)
        else:
            # WebSocket 재연결 시도
            await asyncio.sleep(5)
            await self._ensure_connection(exchange)
    
    async def _should_switch_mode(self, exchange: str) -> bool:
        """모드 전환 필요 여부 판단"""
        failure_count = self._failure_counters.get(exchange, 0)
        
        if failure_count >= self.router_config.switch_threshold:
            return True
        
        # HolySheep AI를 통한 상태 분석
        try:
            analysis = await self.holysheep.analyze_connection_health(
                exchange=exchange,
                failure_count=failure_count,
                current_mode=self.connection_mode.get(f"{exchange}:websocket", ConnectionMode.WEBSOCKET)
            )
            
            if analysis.get("recommend_switch", False):
                return True
        
        except Exception:
            pass
        
        return failure_count >= self.router_config.switch_threshold
    
    def _get_next_mode(self, exchange: str) -> ConnectionMode:
        """다음 모드 결정"""
        first_key = f"{exchange}:websocket"
        current = self.connection_mode.get(first_key, ConnectionMode.WEBSOCKET)
        
        try:
            current_idx = self.router_config.fallback_modes.index(current)
            if current_idx + 1 < len(self.router_config.fallback_modes):
                return self.router_config.fallback_modes[current_idx + 1]
        except ValueError:
            pass
        
        return ConnectionMode.REST
    
    async def _switch_mode(self, exchange: str, new_mode: ConnectionMode):
        """연결 모드 전환"""
        old_mode = self.connection_mode.get(f"{exchange}:websocket", ConnectionMode.WEBSOCKET)
        
        if old_mode == new_mode:
            return
        
        logger.info(f"{exchange} 모드 전환: {old_mode.value} -> {new_mode.value}")
        
        # 통계 업데이트
        for key in self.subscriptions.get(exchange, set()):
            if key in self.mode_stats:
                self.mode_stats[key]["mode_switches"] += 1
        
        self._last_mode_switch[exchange] = time.time()
        self._failure_counters[exchange] = 0
        
        # 새 모드로 연결
        subscriptions = list(self.subscriptions.get(exchange, set()))
        
        if new_mode == ConnectionMode.WEBSOCKET:
            self.connection_mode[f"{exchange}:websocket"] = ConnectionMode.WEBSOCKET
            await self._start_websocket(exchange, subscriptions)
        
        elif new_mode == ConnectionMode.REST:
            self.connection_mode[f"{exchange}:websocket"] = ConnectionMode.REST
            await self._start_polling(exchange, subscriptions, ConnectionMode.REST)
        
        elif new_mode == ConnectionMode.HOLYSHEEP_PROXY:
            self.connection_mode[f"{exchange}:websocket"] = ConnectionMode.HOLYSHEEP_PROXY
            await self._start_holysheep_proxy(exchange, subscriptions)
        
        # 콜백
        if self.on_mode_switch:
            await self.on_mode_switch(exchange, new_mode)
    
    async def _start_polling(
        self,
        exchange: str,
        subscriptions: list,
        mode: ConnectionMode
    ):
        """REST 폴링 모드"""
        logger.info(f"{exchange} REST 폴링 시작")
        
        # REST API 엔드포인트
        endpoints = {
            "binance": "https://api.binance.com/api/v3/ticker/24hr",
            "coinbase": "https://api.exchange.coinbase.com/products"
        }
        
        endpoint = endpoints.get(exchange)
        
        while self._running and self.connection_mode.get(f"{exchange}:websocket") == mode:
            try:
                async with self.rest_session.get(endpoint) as resp:
                    data = await resp.json()
                    
                    # 데이터 처리
                    if isinstance(data, list):
                        for item in data[:10]:  # 상위 10개
                            market_data = MarketData(
                                symbol=item.get("symbol", item.get("id", "")),
                                price=float(item.get("lastPrice", item.get("price", 0))),
                                volume=float(item.get("quoteVolume", 0)),
                                timestamp=time.time(),
                                source=f"{exchange}_rest"
                            )
                            
                            if self.on_market_data:
                                await self.on_market_data(market_data)
                
                # 폴링 간격 (10초)
                await asyncio.sleep(10)
            
            except Exception as e:
                logger.error(f"{exchange} REST 폴링 오류: {e}")
                self._failure_counters[exchange] = self._failure_counters.get(exchange, 0) + 1
                await asyncio.sleep(30)
    
    async def _start_holysheep_proxy(
        self,
        exchange: str,
        subscriptions: list
    ):
        """HolySheep AI 프록시 모드"""
        logger.info(f"{exchange} HolySheep 프록시 시작")
        
        while self._running:
            try:
                # HolySheep AI를 통해 최적의 데이터 라우팅
                data = await self.holysheep.get_market_data(
                    exchange=exchange,
                    subscriptions=subscriptions
                )
                
                if data and self.on_market_data:
                    for item in data:
                        await self.on_market_data(item)
                
                await asyncio.sleep(5)  # HolySheep 폴링 간격
            
            except Exception as e:
                logger.error(f"{exchange} HolySheep 프록시 오류: {e}")
                await asyncio.sleep(30)
    
    async def stop(self):
        """매니저 중지"""
        logger.info("ExchangeWebSocketManager 중지")
        self._running = False
        
        # WebSocket 종료
        for ws in self.active_connections.values():
            await ws.close()
        
        if self.rest_session:
            await self.rest_session.close()


class HolySheepProxy:
    """HolySheep AI 프록시 클라이언트"""
    
    def __init__(self, api_key: str):
        self.api_key = api_key
        self.base_url = "https://api.holysheep.ai
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