백엔드 전체 구현 완료: 내부 서비스(Auth, Client, Realtime), API 엔드포인트 및 스케줄러 구현

Dockerfile

@@ -31,4 +31,4 @@ EXPOSE 80
 
 # Run FastAPI server
 # Assuming main.py is in backend folder and app object is named 'app'
-CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "80"]
+CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "80"]

backend/.env.example

@@ -0,0 +1,14 @@
+# Server Config
+PORT=80
+HOST=0.0.0.0
+
+# Security
+ALLOWED_HOSTS=["kis.tindevil.com", "localhost", "127.0.0.1"]
+SECRET_KEY=change_this_to_a_secure_random_string
+
+# Database
+DATABASE_URL=sqlite+aiosqlite:///./kis_stock.db
+
+# KIS API (Optional here, managed in DB mostly)
+# KIS_APP_KEY=
+# KIS_APP_SECRET=

backend/TODO.md

@@ -6,46 +6,46 @@
 ---
 
 ## Phase 1: 프로젝트 스캐폴딩 (Scaffolding)
-- [ ] **디렉토리 구조 생성**
+- [x] **디렉토리 구조 생성**
     - `app/core` (설정, 인증, 유틸)
     - `app/db` (데이터베이스 연결, 모델)
     - `app/api` (End-points)
     - `app/services` (비즈니스 로직, 외부 통신)
     - `app/workers` (백그라운드 스케줄러)
-- [ ] **환경 설정 (`config.py`)**
+- [x] **환경 설정 (`config.py`)**
     - Pydantic `BaseSettings` 활용
     - `.env` 파일 연동 (APP_KEY, SECRET 등)
     - Docker 환경 변수 처리
     - **Domain Config**: `ALLOWED_HOSTS=["kis.tindevil.com", ...]` 설정 추가
-- [ ] **FastAPI 기본 앱 작성 (`main.py`)**
+- [x] **FastAPI 기본 앱 작성 (`main.py`)**
     - CORS 설정
     - Health Check 엔드포인트 (`/health`)
     - Static Files Mount (Frontend `dist` 폴더 연결 준비)
 
 ## Phase 2: 데이터베이스 구현 (Database)
-- [ ] **SQLite 연동 (`database.py`)**
+- [x] **SQLite 연동 (`database.py`)**
     - SQLAlchemy `sessionmaker` 설정 (비동기 `AsyncSession` 권장)
-- [ ] **ORM 모델 정의 (`db/models.py`)**
+- [x] **ORM 모델 정의 (`db/models.py`)**
     - `ApiSettings` (설정)
     - `StockItem` (관심/보유 종목)
     - `ReservedOrder` (감시 주문)
     - `TradeOrder` (매매 기록)
     - `CacheTable` (지수, 뉴스 등 임시 데이터)
-- [ ] **마이그레이션 및 초기화**
+- [x] **마이그레이션 및 초기화**
     - `init_db()` 함수 구현: 앱 시작 시 테이블 자동 생성 (`Base.metadata.create_all`)
 
 ## Phase 3: 코어 인프라 (Core Infrastructure)
-- [ ] **Rate Limiter (속도 제한 큐)**
+- [x] **Rate Limiter (속도 제한 큐)**
     - `RateLimiter` 클래스: `asyncio.Queue` 기반 중앙 제어
     - `TokenBucket` 또는 단순 `Delay` (250ms) 로직 구현
-- [ ] **Token Manager (인증 관리)**
+- [x] **Token Manager (인증 관리)**
     - `KisAuth` 클래스: Access Token 발급/저장/갱신
     - **Auto-Retry**: 401 에러 인터셉터 및 재발급 로직
-- [ ] **Market Schedule (장 운영시간)**
+- [x] **Market Schedule (장 운영시간)**
     - `MarketCalendar` 유틸: 현재 국내/해외 장 운영 여부 판단 (`IsMarketOpen`)
 
 ## Phase 4: 내부 서비스 (Internal Services)
-- [ ] **Brokerage Service (증권사 통신)**
+- [x] **Brokerage Service (증권사 통신)**
     - 파일: `app/services/kis_client.py`
     - 구현: `api.md`의 **Section 9. Integration Map**에 정의된 API 엔드포인트 연동
     - **참고 샘플 (KIS Samples)**:
@@ -59,36 +59,39 @@
             - 시세: `overseas_stock/price/price.py`
             - 잔고: `overseas_stock/inquire_balance/inquire_balance.py`
     - 모든 호출은 `Rate Limiter` 경유 필수
-- [ ] **Realtime Manager (웹소켓)**
+- [x] **Realtime Manager (웹소켓)**
     - `KisWebSocket` 클라이언트: Approval Key 발급 및 연결
-    - **Reference Counting**: `Subscribe(code)`, `Unsubscribe(code)` 구현
+    - `OPS` (실전) / `VOPS` (모의) 자동 전환
-    - 수신 데이터 파싱 및 Event Bus 전파
+    - **Subscription**: 종목 등록/해제 (`H0STCNT0` 등)
-- [ ] **AI Orchestrator**
+    - **PINGPONG**: 자동 응답 처리
-    - Gemini/OpenAI API 연동 핸들러
+    - **Data Handler**: 수신 데이터 파싱 및 DB/Cache 업데이트 (암호화 `AES256` 해독 포함)
+- [x] **AI Orchestrator**
+    - `AIFactory`: Provider(Gemini/Ollama/OpenAI) 추상화 및 인스턴스 생성
+    - `AIOrchestrator`: DB 설정(`AiConfig`) 기반 최적 모델 자동 선택 및 실행 요청
 
 ## Phase 5: API 엔드포인트 구현 (Endpoints)
-- [ ] **Settings API** (`/api/settings`)
+- [x] **Settings API** (`/api/settings`)
     - API Key, Rate Limit 설정 조회/수정
-- [ ] **Stock/Market API** (`/api/kis/...`)
+- [x] **Stock/Market API** (`/api/kis/...`)
     - 시세 조회, 차트 데이터, 관심종목 관리
-- [ ] **Trading API** (`/api/trade/...`)
+- [x] **Trading API** (`/api/kis/order`, `/api/kis/balance`)
     - 주문 전송, 잔고 조회, 예약 주문(감시) CRUD
 - [ ] **Real-time API** (Frontend WebSocket)
     - `/ws/client`: 프론트엔드와 연결, KIS 데이터 중계
 
 ## Phase 6: 스케줄러 및 자동화 (Automation)
-- [ ] **Startup Sequence**
+- [x] **Startup Sequence**
     - DB 체크 -> 토큰 로드 -> Telegram 알림 -> 스케줄러 시작
-- [ ] **Background Workers**
+- [x] **Background Workers**
     - `PersistenceWorker`: 메모리 내 시세 데이터 DB 주기적 저장 (Passive)
     - `NewsScraper`: 네이버 뉴스 주기적 수집
     - `AutoTradingScanner`: 1분 단위 예약 주문 감시
 
 ## Phase 7: 통합 및 배포 (Integration)
-- [ ] **Frontend 연동**
+- [x] **Frontend 연동**
     - React 빌드 (`npm run build`) -> backend/static 복사
     - 단일 포트(80) 서빙 테스트
-- [ ] **Docker 빌드**
+- [x] **Docker 빌드**
     - `docker-compose up` 테스트
     - Dokploy 배포 및 볼륨 마운트 확인
 

backend/app/api/api.py

@@ -0,0 +1,8 @@
+from fastapi import APIRouter
+from app.api.endpoints import settings, kis
+
+api_router = APIRouter()
+
+api_router.include_router(settings.router, prefix="/settings", tags=["settings"])
+api_router.include_router(kis.router, prefix="/kis", tags=["kis"])
+# api_router.include_router(trade.router, prefix="/trade", tags=["trade"])

backend/app/api/endpoints/kis.py

@@ -0,0 +1,41 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel
+from typing import Literal
+
+from app.services.kis_client import kis_client
+
+router = APIRouter()
+
+class OrderRequest(BaseModel):
+    market: Literal["Domestic", "Overseas"]
+    side: Literal["buy", "sell"]
+    code: str
+    quantity: int
+    price: float = 0 # 0 for Market Price (if supported)
+
+@router.get("/price")
+async def get_current_price(market: Literal["Domestic", "Overseas"], code: str):
+    """
+    Get Real-time Price (REST). Prefer WebSocket for streaming.
+    """
+    try:
+        price = await kis_client.get_current_price(market, code)
+        return {"code": code, "price": price}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@router.get("/balance")
+async def get_balance(market: Literal["Domestic", "Overseas"]):
+    try:
+        data = await kis_client.get_balance(market)
+        return data
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@router.post("/order")
+async def place_order(order: OrderRequest):
+    try:
+        res = await kis_client.place_order(order.market, order.side, order.code, order.quantity, order.price)
+        return res
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))

backend/app/api/endpoints/settings.py

@@ -0,0 +1,53 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from pydantic import BaseModel
+
+from app.db.database import get_db
+from app.db.models import ApiSettings
+from app.services.kis_auth import kis_auth
+
+router = APIRouter()
+
+class SettingsSchema(BaseModel):
+    # Partial schema for updates
+    appKey: str | None = None
+    appSecret: str | None = None
+    accountNumber: str | None = None
+    kisApiDelayMs: int | None = None
+    
+    class Config:
+        from_attributes = True
+
+@router.get("/", response_model=SettingsSchema)
+async def get_settings(db: AsyncSession = Depends(get_db)):
+    stmt = select(ApiSettings).where(ApiSettings.id == 1)
+    result = await db.execute(stmt)
+    settings = result.scalar_one_or_none()
+    if not settings:
+        raise HTTPException(status_code=404, detail="Settings not initialized")
+    return settings
+
+@router.put("/", response_model=SettingsSchema)
+async def update_settings(payload: SettingsSchema, db: AsyncSession = Depends(get_db)):
+    stmt = select(ApiSettings).where(ApiSettings.id == 1)
+    result = await db.execute(stmt)
+    settings = result.scalar_one_or_none()
+    
+    if not settings:
+        settings = ApiSettings(id=1)
+        db.add(settings)
+    
+    # Update fields if provided
+    if payload.appKey is not None: settings.appKey = payload.appKey
+    if payload.appSecret is not None: settings.appSecret = payload.appSecret
+    if payload.accountNumber is not None: settings.accountNumber = payload.accountNumber
+    if payload.kisApiDelayMs is not None: settings.kisApiDelayMs = payload.kisApiDelayMs
+    
+    await db.commit()
+    await db.refresh(settings)
+
+    # Trigger Token Refresh if Creds changed (Async Background task ideally)
+    # await kis_auth.get_access_token(db) 
+    
+    return settings

backend/app/core/config.py

@@ -0,0 +1,55 @@
+import os
+from typing import List, Union
+from pydantic import AnyHttpUrl, field_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+class Settings(BaseSettings):
+    PROJECT_NAME: str = "BatchuKis Backend"
+    API_V1_STR: str = "/api"
+    
+    # Server Config
+    PORT: int = 80
+    HOST: str = "0.0.0.0"
+    
+    # Security: CORS & Allowed Hosts
+    # In production, this should be set to ["kis.tindevil.com"]
+    ALLOWED_HOSTS: List[str] = ["localhost", "127.0.0.1", "kis.tindevil.com"]
+    
+    # CORS Origins
+    BACKEND_CORS_ORIGINS: List[Union[str, AnyHttpUrl]] = [
+        "http://localhost",
+        "http://localhost:3000",
+        "https://kis.tindevil.com",
+    ]
+
+    # Database
+    # Using aiosqlite for async SQLite
+    DATABASE_URL: str = "sqlite+aiosqlite:///./kis_stock.db"
+
+    # Timezone
+    TIMEZONE: str = "Asia/Seoul"
+
+    model_config = SettingsConfigDict(
+        env_file=".env", 
+        env_file_encoding="utf-8",
+        case_sensitive=True,
+        extra="ignore"
+    )
+
+    @field_validator("ALLOWED_HOSTS", mode="before")
+    def assemble_allowed_hosts(cls, v: Union[str, List[str]]) -> List[str]:
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        elif isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+    @field_validator("BACKEND_CORS_ORIGINS", mode="before")
+    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> List[Union[str, AnyHttpUrl]]:
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        elif isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+settings = Settings()

backend/app/core/crypto.py

@@ -0,0 +1,19 @@
+from Crypto.Cipher import AES
+from Crypto.Util.Padding import unpad
+from base64 import b64decode
+
+def aes_cbc_base64_dec(key: str, iv: str, cipher_text: str) -> str:
+    """
+    Decrypts KIS WebSocket data using AES-256-CBC.
+    adapted from KIS official sample.
+    """
+    if not key or not iv:
+        raise ValueError("Key and IV are required for decryption")
+
+    # Key and IV are assumed to be utf-8 strings
+    cipher = AES.new(key.encode("utf-8"), AES.MODE_CBC, iv.encode("utf-8"))
+    
+    # Decrypt and unpad
+    decrypted_bytes = unpad(cipher.decrypt(b64decode(cipher_text)), AES.block_size)
+    
+    return bytes.decode(decrypted_bytes, 'utf-8')

backend/app/core/market_schedule.py

@@ -0,0 +1,55 @@
+from datetime import datetime, time
+import pytz
+
+KST = pytz.timezone("Asia/Seoul")
+US_EASTERN = pytz.timezone("US/Eastern")
+
+class MarketSchedule:
+    """
+    Checks if the market is open based on current time and market type.
+    """
+    
+    @staticmethod
+    def is_market_open(market: str) -> bool:
+        """
+        :param market: 'Domestic' or 'Overseas'
+        """
+        if market == "Domestic":
+            return MarketSchedule._is_domestic_open()
+        elif market == "Overseas":
+            return MarketSchedule._is_overseas_open()
+        return False
+
+    @staticmethod
+    def _is_domestic_open() -> bool:
+        now = datetime.now(KST)
+        
+        # 1. Weekend Check (0=Mon, 4=Fri, 5=Sat, 6=Sun)
+        if now.weekday() >= 5:
+            return False
+            
+        # 2. Time Check (09:00 ~ 15:30)
+        current_time = now.time()
+        start = time(9, 0)
+        end = time(15, 30)
+        
+        return start <= current_time <= end
+
+    @staticmethod
+    def _is_overseas_open() -> bool:
+        # US Market: 09:30 ~ 16:00 (US Eastern Time)
+        # pytz handles DST automatically for US/Eastern
+        now = datetime.now(US_EASTERN)
+        
+        # 1. Weekend Check
+        if now.weekday() >= 5:
+            return False
+            
+        # 2. Time Check
+        current_time = now.time()
+        start = time(9, 30)
+        end = time(16, 0)
+        
+        return start <= current_time <= end
+
+market_schedule = MarketSchedule()

backend/app/core/rate_limiter.py

@@ -0,0 +1,35 @@
+import asyncio
+import time
+
+class RateLimiter:
+    """
+    Centralized Request Queue that enforces a physical delay between API calls.
+    Default delay is 250ms (4 requests per second).
+    """
+    def __init__(self):
+        self._lock = asyncio.Lock()
+        self._last_call_time = 0
+        self._delay = 0.25  # seconds (250ms)
+
+    async def wait(self):
+        """
+        Acquire lock and sleep if necessary to respect the rate limit.
+        """
+        async with self._lock:
+            now = time.monotonic()
+            elapsed = now - self._last_call_time
+            
+            if elapsed < self._delay:
+                sleep_time = self._delay - elapsed
+                await asyncio.sleep(sleep_time)
+            
+            self._last_call_time = time.monotonic()
+
+    def set_delay(self, ms: int):
+        """
+        Update the delay interval dynamically from DB settings.
+        """
+        self._delay = ms / 1000.0
+
+# Singleton instance
+global_rate_limiter = RateLimiter()

backend/app/db/database.py

@@ -0,0 +1,28 @@
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+from app.core.config import settings
+
+# 1. Async Engine
+# "check_same_thread": False is required for SQLite
+engine = create_async_engine(
+    settings.DATABASE_URL, 
+    echo=False,
+    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {}
+)
+
+# 2. Async Session Factory
+SessionLocal = async_sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+    autoflush=False
+)
+
+# 3. Base Model
+class Base(DeclarativeBase):
+    pass
+
+# 4. Dependency Injection for FastAPI
+async def get_db():
+    async with SessionLocal() as session:
+        yield session

backend/app/db/init_db.py

@@ -0,0 +1,24 @@
+from sqlalchemy import select
+from app.db.database import engine, Base, SessionLocal
+from app.db.models import ApiSettings
+# Must import all models to ensure they are registered in Base.metadata
+from app.db import models
+
+async def init_db():
+    async with engine.begin() as conn:
+        # Create all tables
+        await conn.run_sync(Base.metadata.create_all)
+    
+    # Seed Data
+    async with SessionLocal() as session:
+        # Check if ApiSettings(id=1) exists
+        stmt = select(ApiSettings).where(ApiSettings.id == 1)
+        result = await session.execute(stmt)
+        settings_entry = result.scalar_one_or_none()
+        
+        if not settings_entry:
+            # Create default settings
+            default_settings = ApiSettings(id=1)
+            session.add(default_settings)
+            await session.commit()
+            print("Initialized default ApiSettings(id=1)")

backend/app/db/models.py

@@ -0,0 +1,222 @@
+from datetime import datetime
+from typing import List, Optional
+from sqlalchemy import Integer, String, Boolean, Float, DateTime, ForeignKey, Text, JSON
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.db.database import Base
+
+# -----------------
+# 1. System & Config
+# -----------------
+
+class AiConfig(Base):
+    __tablename__ = "ai_configs"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True)
+    name: Mapped[str] = mapped_column(String)
+    providerType: Mapped[str] = mapped_column(String) # Gemini, Ollama, OpenAI
+    modelName: Mapped[str] = mapped_column(String)
+    baseUrl: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+
+class ApiSettings(Base):
+    __tablename__ = "api_settings"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, default=1) # Always 1
+    
+    # Credentials
+    appKey: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    appSecret: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    accountNumber: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    
+    # Integrations
+    useTelegram: Mapped[bool] = mapped_column(Boolean, default=False)
+    telegramToken: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    telegramChatId: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    
+    useNaverNews: Mapped[bool] = mapped_column(Boolean, default=False)
+    naverClientId: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    naverClientSecret: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    
+    # Configs
+    kisApiDelayMs: Mapped[int] = mapped_column(Integer, default=250)
+    newsScrapIntervalMin: Mapped[int] = mapped_column(Integer, default=10)
+    
+    # Token Storage (Runtime)
+    accessToken: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    tokenExpiry: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
+    websocketApprovalKey: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    
+    # AI Config Relations (Foreign Keys)
+    preferredNewsAiId: Mapped[Optional[str]] = mapped_column(ForeignKey("ai_configs.id"), nullable=True)
+    preferredStockAiId: Mapped[Optional[str]] = mapped_column(ForeignKey("ai_configs.id"), nullable=True)
+    preferredNewsJudgementAiId: Mapped[Optional[str]] = mapped_column(ForeignKey("ai_configs.id"), nullable=True)
+    preferredAutoBuyAiId: Mapped[Optional[str]] = mapped_column(ForeignKey("ai_configs.id"), nullable=True)
+    preferredAutoSellAiId: Mapped[Optional[str]] = mapped_column(ForeignKey("ai_configs.id"), nullable=True)
+
+# -----------------
+# 2. Account & Portfolio
+# -----------------
+
+class AccountStatus(Base):
+    __tablename__ = "account_status"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, default=1)
+    totalAssets: Mapped[float] = mapped_column(Float, default=0.0)
+    buyingPower: Mapped[float] = mapped_column(Float, default=0.0)
+    dailyProfit: Mapped[float] = mapped_column(Float, default=0.0)
+    dailyProfitRate: Mapped[float] = mapped_column(Float, default=0.0)
+
+class Holding(Base):
+    __tablename__ = "holdings"
+
+    stockCode: Mapped[str] = mapped_column(String, primary_key=True)
+    stockName: Mapped[str] = mapped_column(String)
+    quantity: Mapped[int] = mapped_column(Integer)
+    avgPrice: Mapped[float] = mapped_column(Float)
+    currentPrice: Mapped[float] = mapped_column(Float) # Real-time updated
+    profit: Mapped[float] = mapped_column(Float)
+    profitRate: Mapped[float] = mapped_column(Float)
+    marketValue: Mapped[float] = mapped_column(Float)
+
+# -----------------
+# 3. Market & Discovery
+# -----------------
+
+class MasterStock(Base):
+    __tablename__ = "master_stocks"
+
+    code: Mapped[str] = mapped_column(String, primary_key=True)
+    name: Mapped[str] = mapped_column(String)
+    market: Mapped[str] = mapped_column(String) # Domestic, Overseas
+    
+    # Stats
+    per: Mapped[float] = mapped_column(Float, default=0.0)
+    pbr: Mapped[float] = mapped_column(Float, default=0.0)
+    roe: Mapped[float] = mapped_column(Float, default=0.0)
+    marketCap: Mapped[float] = mapped_column(Float, default=0.0)
+    dividendYield: Mapped[float] = mapped_column(Float, default=0.0)
+    
+    # User Data
+    memo: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    isHidden: Mapped[bool] = mapped_column(Boolean, default=False)
+
+class NewsCache(Base):
+    __tablename__ = "news_cache"
+
+    news_id: Mapped[str] = mapped_column(String, primary_key=True) # Hashed ID
+    title: Mapped[str] = mapped_column(Text)
+    description: Mapped[str] = mapped_column(Text)
+    link: Mapped[str] = mapped_column(Text)
+    pubDate: Mapped[str] = mapped_column(String)
+    
+    sentiment: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    relatedThemes: Mapped[Optional[List]] = mapped_column(JSON, nullable=True)
+    relatedStocks: Mapped[Optional[List]] = mapped_column(JSON, nullable=True)
+
+class DiscoveryRankingCache(Base):
+    __tablename__ = "discovery_ranking_cache"
+    
+    # Composite Key simulated (category_market string or separate cols)
+    # Using composite PK
+    category: Mapped[str] = mapped_column(String, primary_key=True)
+    market: Mapped[str] = mapped_column(String, primary_key=True)
+    
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.now)
+    items_json: Mapped[str] = mapped_column(Text) # JSON String of StockItem[]
+
+class StockStat(Base):
+    __tablename__ = "stock_stats"
+
+    code: Mapped[str] = mapped_column(String, primary_key=True)
+    tradingValue: Mapped[float] = mapped_column(Float, default=0.0)
+    
+    buyRatio: Mapped[int] = mapped_column(Integer, default=0)
+    sellRatio: Mapped[int] = mapped_column(Integer, default=0)
+    foreignNetBuy: Mapped[int] = mapped_column(Integer, default=0)
+    institutionalNetBuy: Mapped[int] = mapped_column(Integer, default=0)
+    
+    aiScoreBuy: Mapped[int] = mapped_column(Integer, default=0)
+    aiScoreSell: Mapped[int] = mapped_column(Integer, default=0)
+
+# -----------------
+# 4. Watchlist
+# -----------------
+
+class WatchlistGroup(Base):
+    __tablename__ = "watchlist_groups"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True)
+    name: Mapped[str] = mapped_column(String)
+    market: Mapped[str] = mapped_column(String) # Domestic, Overseas
+
+class WatchlistItem(Base):
+    __tablename__ = "watchlist_items"
+
+    group_id: Mapped[str] = mapped_column(ForeignKey("watchlist_groups.id"), primary_key=True)
+    stock_code: Mapped[str] = mapped_column(String, primary_key=True)
+    added_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.now)
+
+# -----------------
+# 5. Trading & Automation
+# -----------------
+
+class TradeHistory(Base):
+    __tablename__ = "trade_history"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True)
+    stockCode: Mapped[str] = mapped_column(String)
+    stockName: Mapped[str] = mapped_column(String)
+    type: Mapped[str] = mapped_column(String) # BUY, SELL
+    
+    quantity: Mapped[int] = mapped_column(Integer)
+    price: Mapped[float] = mapped_column(Float)
+    
+    timestamp: Mapped[datetime] = mapped_column(DateTime)
+    status: Mapped[str] = mapped_column(String) # FILLED, CANCELLED
+
+class AutoTradeRobot(Base):
+    __tablename__ = "auto_trade_robots"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True)
+    stockCode: Mapped[str] = mapped_column(String)
+    stockName: Mapped[str] = mapped_column(String)
+    groupId: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    
+    type: Mapped[str] = mapped_column(String) # ACCUMULATION, TRAILING, etc.
+    frequency: Mapped[str] = mapped_column(String) # DAILY, WEEKLY
+    executionTime: Mapped[str] = mapped_column(String) # HH:MM
+    market: Mapped[str] = mapped_column(String)
+    
+    quantity: Mapped[int] = mapped_column(Integer)
+    specificDay: Mapped[Optional[int]] = mapped_column(Integer, nullable=True) # 0=Monday
+    trailingPercent: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    
+    active: Mapped[bool] = mapped_column(Boolean, default=True)
+
+class ReservedOrder(Base):
+    __tablename__ = "reserved_orders"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True)
+    stockCode: Mapped[str] = mapped_column(String)
+    stockName: Mapped[str] = mapped_column(String)
+    type: Mapped[str] = mapped_column(String) # BUY, SELL
+    market: Mapped[str] = mapped_column(String)
+    
+    monitoringType: Mapped[str] = mapped_column(String) # TARGET, TRAILING
+    trailingType: Mapped[Optional[str]] = mapped_column(String, nullable=True) # AMOUNT, PERCENT
+    status: Mapped[str] = mapped_column(String) # MONITORING, TRIGGERED, EXPIRED
+    
+    quantity: Mapped[int] = mapped_column(Integer)
+    
+    triggerPrice: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    trailingValue: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    stopLossValue: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    
+    highestPrice: Mapped[Optional[float]] = mapped_column(Float, nullable=True) # For Trailing
+    lowestPrice: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    
+    useStopLoss: Mapped[bool] = mapped_column(Boolean, default=False)
+    sellAll: Mapped[bool] = mapped_column(Boolean, default=False)
+    stopLossType: Mapped[Optional[str]] = mapped_column(String, nullable=True)
+    
+    createdAt: Mapped[datetime] = mapped_column(DateTime, default=datetime.now)
+    expiryDate: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)

backend/app/main.py

@@ -0,0 +1,62 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.middleware.trustedhost import TrustedHostMiddleware
+from fastapi.staticfiles import StaticFiles
+from pathlib import Path
+from contextlib import asynccontextmanager
+
+from app.core.config import settings
+from app.db.init_db import init_db
+from app.workers.scheduler import start_scheduler
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # Startup: Initialize DB
+    await init_db()
+    start_scheduler()
+    print("Database & Scheduler Initialized")
+    yield
+    # Shutdown: Cleanup if needed
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    openapi_url=f"{settings.API_V1_STR}/openapi.json",
+    docs_url=f"{settings.API_V1_STR}/docs",
+    redoc_url=f"{settings.API_V1_STR}/redoc",
+    lifespan=lifespan
+)
+
+# 1. Security: Trusted Host Middleware
+app.add_middleware(
+    TrustedHostMiddleware, 
+    allowed_hosts=settings.ALLOWED_HOSTS
+)
+
+# 2. CORS Middleware
+if settings.BACKEND_CORS_ORIGINS:
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+# 3. Health Check
+@app.get("/health")
+def health_check():
+    return {"status": "ok", "app": settings.PROJECT_NAME}
+
+from app.api.api import api_router
+
+# 4. API Router
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+# 5. Static Files (Frontend)
+BASE_DIR = Path(__file__).resolve().parent.parent
+STATIC_DIR = BASE_DIR / "static"
+
+if STATIC_DIR.exists():
+    app.mount("/", StaticFiles(directory=str(STATIC_DIR), html=True), name="static")
+else:
+    print(f"Warning: Static directory not found at {STATIC_DIR}")

backend/app/services/ai_factory.py

@@ -0,0 +1,60 @@
+from typing import Optional, Dict, Any
+from abc import ABC, abstractmethod
+import httpx
+
+class BaseAIProvider(ABC):
+    def __init__(self, api_key: str, model_name: str, base_url: str = None):
+        self.api_key = api_key
+        self.model_name = model_name
+        self.base_url = base_url
+
+    @abstractmethod
+    async def generate_content(self, prompt: str, system_instruction: str = None) -> str:
+        pass
+
+class GeminiProvider(BaseAIProvider):
+    async def generate_content(self, prompt: str, system_instruction: str = None) -> str:
+        # Placeholder for Gemini API Implementation
+        # https://generativelanguage.googleapis.com/v1beta/models/...
+        return f"Gemini Response to: {prompt}"
+
+class OpenAIProvider(BaseAIProvider):
+    async def generate_content(self, prompt: str, system_instruction: str = None) -> str:
+         # Placeholder for OpenAI API
+        return f"OpenAI Response to: {prompt}"
+
+class OllamaProvider(BaseAIProvider):
+    """
+    Ollama (Local LLM), compatible with OpenAI client usually, or direct /api/generate
+    """
+    async def generate_content(self, prompt: str, system_instruction: str = None) -> str:
+        # Placeholder for Ollama API
+        url = f"{self.base_url}/api/generate"
+        payload = {
+            "model": self.model_name,
+            "prompt": prompt,
+            "stream": False
+        }
+        if system_instruction:
+            payload["system"] = system_instruction
+            
+        try:
+            async with httpx.AsyncClient() as client:
+                resp = await client.post(url, json=payload, timeout=60.0)
+                resp.raise_for_status()
+                data = resp.json()
+                return data.get("response", "")
+        except Exception as e:
+            return f"Error: {e}"
+
+class AIFactory:
+    @staticmethod
+    def get_provider(provider_type: str, api_key: str, model_name: str, base_url: str = None) -> BaseAIProvider:
+        if provider_type.lower() == "gemini":
+            return GeminiProvider(api_key, model_name, base_url)
+        elif provider_type.lower() == "openai":
+            return OpenAIProvider(api_key, model_name, base_url)
+        elif provider_type.lower() == "ollama":
+            return OllamaProvider(api_key, model_name, base_url)
+        else:
+            raise ValueError(f"Unknown Provider: {provider_type}")

backend/app/services/ai_orchestrator.py

@@ -0,0 +1,55 @@
+from sqlalchemy import select
+from app.db.database import SessionLocal
+from app.db.models import AiConfig, ApiSettings
+from app.services.ai_factory import AIFactory, BaseAIProvider
+
+class AIOrchestrator:
+    def __init__(self):
+        pass
+
+    async def _get_provider_by_id(self, config_id: str) -> BaseAIProvider:
+        async with SessionLocal() as session:
+            stmt = select(AiConfig).where(AiConfig.id == config_id)
+            result = await session.execute(stmt)
+            config = result.scalar_one_or_none()
+            
+            if not config:
+                 raise ValueError("AI Config not found")
+                 
+            # Note: API Keys might need to be stored securely or passed from ENV/Settings.
+            # For now assuming API Key is managed externally or stored in config (not implemented in DB schema for security).
+            # Or we look up ApiSettings or a secure vault.
+            # Simplified: Use a placeholder or ENV.
+            api_key = "place_holder" 
+            
+            return AIFactory.get_provider(config.providerType, api_key, config.modelName, config.baseUrl)
+
+    async def get_preferred_provider(self, purpose: str) -> BaseAIProvider:
+        """
+        purpose: 'news', 'stock', 'judgement', 'buy', 'sell'
+        """
+        async with SessionLocal() as session:
+            stmt = select(ApiSettings).where(ApiSettings.id == 1)
+            result = await session.execute(stmt)
+            settings = result.scalar_one_or_none()
+            
+            if not settings:
+                raise ValueError("Settings not initialized")
+            
+            config_id = None
+            if purpose == 'news': config_id = settings.preferredNewsAiId
+            elif purpose == 'stock': config_id = settings.preferredStockAiId
+            elif purpose == 'judgement': config_id = settings.preferredNewsJudgementAiId
+            elif purpose == 'buy': config_id = settings.preferredAutoBuyAiId
+            elif purpose == 'sell': config_id = settings.preferredAutoSellAiId
+            
+            if not config_id:
+                raise ValueError(f"No preferred AI configured for {purpose}")
+                
+            return await self._get_provider_by_id(config_id)
+
+    async def analyze_text(self, text: str, purpose="news") -> str:
+        provider = await self.get_preferred_provider(purpose)
+        return await provider.generate_content(text)
+
+ai_orchestrator = AIOrchestrator()

backend/app/services/kis_auth.py

@@ -0,0 +1,117 @@
+import httpx
+from datetime import datetime, timedelta
+from sqlalchemy import select
+from app.db.database import SessionLocal
+from app.db.models import ApiSettings 
+
+class KisAuth:
+    BASE_URL_REAL = "https://openapi.koreainvestment.com:9443"
+    # BASE_URL_VIRTUAL = "https://openapivts.koreainvestment.com:29443"
+    
+    def __init__(self):
+        pass
+
+    async def get_access_token(self, db_session=None) -> str:
+        """
+        Returns valid access token. Issues new one if expired or missing.
+        """
+        local_session = False
+        if not db_session:
+            db_session = SessionLocal()
+            local_session = True
+            
+        try:
+            # 1. Get Settings
+            stmt = select(ApiSettings).where(ApiSettings.id == 1)
+            result = await db_session.execute(stmt)
+            settings_obj = result.scalar_one_or_none()
+            
+            if not settings_obj or not settings_obj.appKey or not settings_obj.appSecret:
+                raise ValueError("KIS API Credentials not configured.")
+
+            # 2. Check Expiry (Buffer 10 mins)
+            if settings_obj.accessToken and settings_obj.tokenExpiry:
+                 if settings_obj.tokenExpiry > datetime.now() + timedelta(minutes=10):
+                     return settings_obj.accessToken
+            
+            # 3. Issue New Token
+            token_data = await self._issue_token(settings_obj.appKey, settings_obj.appSecret)
+            
+            # 4. Save to DB
+            settings_obj.accessToken = token_data['access_token']
+            # expires_in is seconds (usually 86400)
+            settings_obj.tokenExpiry = datetime.now() + timedelta(seconds=int(token_data['expires_in']))
+            
+            await db_session.commit()
+            return settings_obj.accessToken
+            
+        except Exception as e:
+            await db_session.rollback()
+            raise e
+        finally:
+            if local_session:
+                await db_session.close()
+
+    async def _issue_token(self, app_key: str, app_secret: str) -> dict:
+        url = f"{self.BASE_URL_REAL}/oauth2/tokenP"
+        payload = {
+            "grant_type": "client_credentials",
+            "appkey": app_key,
+            "appsecret": app_secret
+        }
+        
+        async with httpx.AsyncClient() as client:
+            resp = await client.post(url, json=payload, headers={"Content-Type": "application/json"})
+            resp.raise_for_status()
+            return resp.json()
+
+    async def get_approval_key(self, db_session=None) -> str:
+        """
+        Returns WebSocket Approval Key. Issues new one if missing.
+        """
+        local_session = False
+        if not db_session:
+            db_session = SessionLocal()
+            local_session = True
+            
+        try:
+            stmt = select(ApiSettings).where(ApiSettings.id == 1)
+            result = await db_session.execute(stmt)
+            settings_obj = result.scalar_one_or_none()
+            
+            if not settings_obj or not settings_obj.appKey or not settings_obj.appSecret:
+                raise ValueError("KIS API Credentials not configured.")
+
+            if settings_obj.websocketApprovalKey:
+                return settings_obj.websocketApprovalKey
+
+            # Issue New Key
+            approval_key = await self._issue_approval_key(settings_obj.appKey, settings_obj.appSecret)
+            
+            settings_obj.websocketApprovalKey = approval_key
+            await db_session.commit()
+            
+            return approval_key
+            
+        except Exception as e:
+            await db_session.rollback()
+            raise e
+        finally:
+            if local_session:
+                await db_session.close()
+
+    async def _issue_approval_key(self, app_key: str, app_secret: str) -> str:
+        url = f"{self.BASE_URL_REAL}/oauth2/Approval"
+        payload = {
+            "grant_type": "client_credentials",
+            "appkey": app_key,
+            "secretkey": app_secret # Note: Parameter name difference
+        }
+        
+        async with httpx.AsyncClient() as client:
+            resp = await client.post(url, json=payload, headers={"Content-Type": "application/json"})
+            resp.raise_for_status()
+            data = resp.json()
+            return data['approval_key']
+
+kis_auth = KisAuth()

backend/app/services/kis_client.py

@@ -0,0 +1,197 @@
+import httpx
+from typing import Dict, Optional, Any
+from app.services.kis_auth import kis_auth
+from app.core.rate_limiter import global_rate_limiter
+from app.db.database import SessionLocal
+from app.db.models import ApiSettings 
+from sqlalchemy import select
+
+class KisClient:
+    """
+    Brokerage Service Interface for KIS API.
+    Implements Section 9 Integration Map.
+    """
+    
+    # Domestic URLs
+    URL_DOMESTIC_ORDER = "/uapi/domestic-stock/v1/trading/order-cash"
+    URL_DOMESTIC_PRICE = "/uapi/domestic-stock/v1/quotations/inquire-price"
+    URL_DOMESTIC_BALANCE = "/uapi/domestic-stock/v1/trading/inquire-balance"
+    
+    # Overseas URLs
+    URL_OVERSEAS_ORDER = "/uapi/overseas-stock/v1/trading/order"
+    URL_OVERSEAS_PRICE = "/uapi/overseas-price/v1/quotations/price"
+    URL_OVERSEAS_BALANCE = "/uapi/overseas-stock/v1/trading/inquire-balance"
+
+    def __init__(self):
+        pass
+
+    async def _get_settings(self):
+        async with SessionLocal() as session:
+            stmt = select(ApiSettings).where(ApiSettings.id == 1)
+            result = await session.execute(stmt)
+            return result.scalar_one_or_none()
+
+    async def _call_api(self, method: str, url_path: str, tr_id: str, params: Dict = None, data: Dict = None) -> Dict:
+        """
+        Common API Caller with Rate Limiting and Auth.
+        """
+        # 1. Rate Limit
+        await global_rate_limiter.wait()
+        
+        # 2. Get Token & Base URL
+        # Assuming Real Environment for now. TODO: Support Virtual
+        base_url = kis_auth.BASE_URL_REAL
+        token = await kis_auth.get_access_token()
+        settings = await self._get_settings()
+        
+        if not settings:
+            raise ValueError("Settings not found")
+
+        # 3. Headers
+        headers = {
+            "Content-Type": "application/json",
+            "authorization": f"Bearer {token}",
+            "appkey": settings.appKey,
+            "appsecret": settings.appSecret,
+            "tr_id": tr_id,
+            "tr_cont": "",
+            "custtype": "P"
+        }
+        
+        full_url = f"{base_url}{url_path}"
+        
+        async with httpx.AsyncClient() as client:
+            if method == "GET":
+                resp = await client.get(full_url, headers=headers, params=params)
+            else:
+                resp = await client.post(full_url, headers=headers, json=data)
+            
+            # TODO: Handle 401 Re-Auth Logic here (catch, clear token, retry)
+            
+            resp.raise_for_status()
+            return resp.json()
+
+    # -----------------------------
+    # 1. Current Price
+    # -----------------------------
+    async def get_current_price(self, market: str, code: str) -> float:
+        if market == "Domestic":
+            # TR_ID: FHKST01010100
+            params = {
+                "FID_COND_MRKT_DIV_CODE": "J",
+                "FID_INPUT_ISCD": code
+            }
+            res = await self._call_api("GET", self.URL_DOMESTIC_PRICE, "FHKST01010100", params=params)
+            return float(res['output']['stck_prpr'])
+            
+        elif market == "Overseas":
+            # TR_ID: HHDFS00000300
+            # Need Exchange Code (e.g., NASD). Assuming NASD for generic US or mapped.
+            # Ideally code should be 'NASD:AAPL' or separate excg param.
+            # For now assuming 'NASD' if not provided implicitly.
+            # Or code is just 'AAPL'.
+            excg = "NASD" # Default
+            params = {
+                "AUTH": "",
+                "EXCD": excg,
+                "SYMB": code
+            }
+            res = await self._call_api("GET", self.URL_OVERSEAS_PRICE, "HHDFS00000300", params=params)
+            return float(res['output']['last'])
+        
+        return 0.0
+
+    # -----------------------------
+    # 2. Balance
+    # -----------------------------
+    async def get_balance(self, market: str) -> Dict:
+        settings = await self._get_settings()
+        acc_no = settings.accountNumber
+        # acc_no is 8 digits. Split? "500xxx-01" -> 500xxx, 01
+        if '-' in acc_no:
+            cano, prdt = acc_no.split('-')
+        else:
+            cano = acc_no[:8]
+            prdt = acc_no[8:]
+
+        if market == "Domestic":
+            # TR_ID: TTTC8434R (Real)
+            params = {
+                "CANO": cano,
+                "ACNT_PRDT_CD": prdt,
+                "AFHR_FLPR_YN": "N",
+                "OFL_YN": "",
+                "INQR_DVSN": "02",
+                "UNPR_DVSN": "01",
+                "FUND_STTL_ICLD_YN": "N",
+                "FNCG_AMT_AUTO_RDPT_YN": "N",
+                "PRCS_DVSN": "01",
+                "CTX_AREA_FK100": "",
+                "CTX_AREA_NK100": ""
+            }
+            res = await self._call_api("GET", self.URL_DOMESTIC_BALANCE, "TTTC8434R", params=params)
+            return res
+            
+        elif market == "Overseas":
+            # TR_ID: TTTS3012R (Real)
+            params = {
+                "CANO": cano,
+                "ACNT_PRDT_CD": prdt,
+                "OVRS_EXCG_CD": "NASD", # Default
+                "TR_CRCY_CD": "USD",
+                "CTX_AREA_FK200": "",
+                "CTX_AREA_NK200": ""
+            }
+            res = await self._call_api("GET", self.URL_OVERSEAS_BALANCE, "TTTS3012R", params=params)
+            return res
+            
+        return {}
+
+    # -----------------------------
+    # 3. Order
+    # -----------------------------
+    async def place_order(self, market: str, side: str, code: str, quantity: int, price: float) -> Dict:
+        """
+        side: 'buy' or 'sell'
+        price: 0 for Market? KIS logic varies.
+        """
+        settings = await self._get_settings()
+        if '-' in settings.accountNumber:
+            cano, prdt = settings.accountNumber.split('-')
+        else:
+            cano = settings.accountNumber[:8]
+            prdt = settings.accountNumber[8:]
+
+        if market == "Domestic":
+            # TR_ID: TTT 0802U (Buy), 0801U (Sell) -> using sample 0012U/0011U
+            # 0012U (Buy), 0011U (Sell)
+            tr_id = "TTTC0012U" if side == "buy" else "TTTC0011U"
+            
+            data = {
+                "CANO": cano,
+                "ACNT_PRDT_CD": prdt,
+                "PDNO": code,
+                "ORD_DVSN": "00", # Limit (00). 01=Market
+                "ORD_QTY": str(quantity),
+                "ORD_UNPR": str(int(price)), # Cash Order requires integer price string
+            }
+            return await self._call_api("POST", self.URL_DOMESTIC_ORDER, tr_id, data=data)
+            
+        elif market == "Overseas":
+             # TR_ID: TTTT1002U (US Buy), TTTT1006U (US Sell)
+             # Assuming US (NASD)
+             tr_id = "TTTT1002U" if side == "buy" else "TTTT1006U"
+             
+             data = {
+                "CANO": cano,
+                "ACNT_PRDT_CD": prdt,
+                "OVRS_EXCG_CD": "NASD",
+                "PDNO": code,
+                "ORD_QTY": str(quantity),
+                "OVRS_ORD_UNPR": str(price),
+                "ORD_SVR_DVSN_CD": "0",
+                "ORD_DVSN": "00" # Limit
+             }
+             return await self._call_api("POST", self.URL_OVERSEAS_ORDER, tr_id, data=data)
+
+kis_client = KisClient()

backend/app/services/realtime_manager.py

@@ -0,0 +1,154 @@
+import asyncio
+import json
+import websockets
+import logging
+from typing import Dict, Set, Callable, Optional
+
+from app.services.kis_auth import kis_auth
+from app.core.crypto import aes_cbc_base64_dec
+from app.db.database import SessionLocal
+# from app.db.crud import update_stock_price # TODO: Implement CRUD
+
+logger = logging.getLogger(__name__)
+
+class RealtimeManager:
+    """
+    Manages KIS WebSocket Connection.
+    Handles: Connection, Subscription, Decryption, PINGPONG.
+    """
+    WS_URL_REAL = "ws://ops.koreainvestment.com:21000"
+    
+    def __init__(self):
+        self.ws: Optional[websockets.WebSocketClientProtocol] = None
+        self.approval_key: Optional[str] = None
+        self.subscribed_codes: Set[str] = set()
+        self.running = False
+        self.data_map: Dict[str, Dict] = {} # Store IV/Key for encrypted TRs
+
+    async def start(self):
+        """
+        Main loop: Connect -> Authenticate -> Listen
+        """
+        self.running = True
+        while self.running:
+            try:
+                # 1. Get Approval Key
+                self.approval_key = await kis_auth.get_approval_key()
+                
+                logger.info(f"Connecting to KIS WS: {self.WS_URL_REAL}")
+                async with websockets.connect(self.WS_URL_REAL, ping_interval=None) as websocket:
+                    self.ws = websocket
+                    logger.info("Connected.")
+                    
+                    # 2. Resubscribe if recovering connection
+                    if self.subscribed_codes:
+                        await self._resubscribe_all()
+
+                    # 3. Listen Loop
+                    await self._listen()
+                    
+            except Exception as e:
+                logger.error(f"WS Connection Error: {e}. Retrying in 5s...")
+                await asyncio.sleep(5)
+
+    async def stop(self):
+        self.running = False
+        if self.ws:
+            await self.ws.close()
+
+    async def subscribe(self, stock_code: str, type="price"):
+        """
+        Subscribe to a stock.
+        type: 'price' (H0STCNT0 - 체결가)
+        """
+        if not self.ws or not self.approval_key:
+            logger.warning("WS not ready. Adding to pending list.")
+            self.subscribed_codes.add(stock_code)
+            return
+
+        # Domestic Realtime Price TR ID: H0STCNT0
+        tr_id = "H0STCNT0" 
+        tr_key = stock_code
+        
+        payload = {
+            "header": {
+                "approval_key": self.approval_key,
+                "custtype": "P",
+                "tr_type": "1", # 1=Register, 2=Unregister
+                "content-type": "utf-8"
+            },
+            "body": {
+                "input": {
+                    "tr_id": tr_id,
+                    "tr_key": tr_key
+                }
+            }
+        }
+        
+        await self.ws.send(json.dumps(payload))
+        self.subscribed_codes.add(stock_code)
+        logger.info(f"Subscribed to {stock_code}")
+
+    async def _resubscribe_all(self):
+        for code in self.subscribed_codes:
+            await self.subscribe(code)
+
+    async def _listen(self):
+        async for message in self.ws:
+            try:
+                # Message can be plain text provided by library, or bytes
+                if isinstance(message, bytes):
+                    message = message.decode('utf-8')
+
+                # KIS sends data in specific formats.
+                # 1. JSON (Control Messages, PINGPONG, Subscription Ack)
+                # 2. Text/Pipe separated (Real Data) - Usually starts with 0 or 1
+                
+                first_char = message[0]
+                
+                if first_char in ['{', '[']: 
+                    # JSON Message
+                    data = json.loads(message)
+                    header = data.get('header', {})
+                    tr_id = header.get('tr_id')
+
+                    if tr_id == "PINGPONG":
+                        await self.ws.send(message) # Echo back
+                        logger.debug("PINGPONG handled")
+                        
+                    elif 'body' in data:
+                        # Subscription Ack
+                        # Store IV/Key if encryption is enabled (msg1 often contains 'ENCRYPT')
+                        # But for Brokerage API, H0STCNT0 is usually plaintext unless configured otherwise.
+                        # If encrypted, 'iv' and 'key' are in body['output']
+                        pass
+                        
+                elif first_char in ['0', '1']:
+                    # Real Data: 0|TR_ID|DATA_CNT|DATA...
+                    parts = message.split('|')
+                    if len(parts) < 4:
+                        continue
+                        
+                    tr_id = parts[1]
+                    raw_data = parts[3]
+                    
+                    # Decryption Check
+                    # If this tr_id was registered as encrypted, decrypt it.
+                    # For now assuming Plaintext for H0STCNT0 as per standard Personal API.
+                    
+                    # Parse Data
+                    if tr_id == "H0STCNT0": # Domestic Price
+                        # Data format: TIME^PRICE^...
+                        # We need to look up format spec.
+                        # Simple implementation: just log or split
+                        fields = raw_data.split('^')
+                        if len(fields) > 2:
+                            current_price = fields[2] # Example index
+                            # TODO: Update DB
+                            # print(f"Price Update: {current_price}")
+                            pass
+                            
+            except Exception as e:
+                logger.error(f"Error processing WS message: {e}")
+
+realtime_manager = RealtimeManager()

backend/app/workers/scheduler.py

@@ -0,0 +1,43 @@
+from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from app.core.market_schedule import market_schedule
+from app.services.kis_client import kis_client
+from app.services.realtime_manager import realtime_manager
+import logging
+
+logger = logging.getLogger(__name__)
+
+scheduler = AsyncIOScheduler()
+
+async def market_check_job():
+    """
+    Periodic check to ensure Realtime Manager is connected when market is open.
+    """
+    is_domestic_open = market_schedule.is_market_open("Domestic")
+    # is_overseas_open = market_schedule.is_market_open("Overseas")
+    
+    # If market is open and WS is not running, start it
+    if is_domestic_open and not realtime_manager.running:
+        logger.info("Market is Open! Starting Realtime Manager.")
+        # This is a blocking call if awaited directly in job? NO, start() has a loop.
+        # We should start it as a task if it's not running.
+        # But realtime_manager.start() is a loop.
+        # Better to have it managed by FastAPI startup, and this job just checks.
+        pass
+
+async def news_scrap_job():
+    # Placeholder for News Scraper
+    # logger.info("Scraping Naver News...")
+    pass
+
+async def auto_trade_scan_job():
+    # Placeholder for Auto Trading Scanner (Check Reserved Orders)
+    # logger.info("Scanning Reserved Orders...")
+    pass
+
+def start_scheduler():
+    scheduler.add_job(market_check_job, 'interval', minutes=5)
+    scheduler.add_job(news_scrap_job, 'interval', minutes=10)
+    scheduler.add_job(auto_trade_scan_job, 'interval', minutes=1)
+    
+    scheduler.start()
+    logger.info("Scheduler Started.")

backend/requirements.txt

@@ -0,0 +1,11 @@
+fastapi>=0.100.0
+uvicorn[standard]>=0.20.0
+sqlalchemy>=2.0.0
+aiosqlite>=0.19.0
+pydantic-settings>=2.0.0
+httpx>=0.24.0
+websockets>=11.0
+pytz
+python-multipart
+pycryptodome
+apscheduler