Implement cryptocurrency data service with CoinCap API integration

README.md

@@ -1,3 +1,107 @@
-# FastAPI Application
+# Cryptocurrency Data Service
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A FastAPI backend service that provides cryptocurrency market data by integrating with the CoinCap API v3.
+
+## Features
+
+- **Real-time Cryptocurrency Data**: Access comprehensive data for thousands of cryptocurrencies
+- **Market Information**: Detailed exchange and trading pair data
+- **Historical Prices**: Access historical price data with various time intervals
+- **Conversion Rates**: Get current conversion rates between cryptocurrencies and fiat currencies
+- **Data Persistence**: Local SQLite database for caching and quick retrieval
+- **Health Monitoring**: Built-in health check endpoint
+
+## Tech Stack
+
+- **FastAPI**: Modern, high-performance web framework
+- **SQLAlchemy**: SQL toolkit and ORM
+- **Alembic**: Database migration tool
+- **SQLite**: Lightweight relational database
+- **HTTPX**: Asynchronous HTTP client
+- **Pydantic**: Data validation and settings management
+- **Uvicorn**: ASGI server
+
+## API Endpoints
+
+The service provides the following API endpoints:
+
+### Health Check
+
+- `GET /health`: Check the health status of the service and its dependencies
+
+### Assets
+
+- `GET /api/assets`: Get a list of cryptocurrency assets with optional filtering and pagination
+- `GET /api/assets/{slug}`: Get detailed information about a specific asset
+- `GET /api/assets/{slug}/markets`: Get market information for a specific asset
+- `GET /api/assets/{slug}/history`: Get historical price data for a specific asset
+
+### Exchanges
+
+- `GET /api/exchanges`: Get a list of exchanges with optional pagination
+- `GET /api/exchanges/{exchange_id}`: Get detailed information about a specific exchange
+
+### Markets
+
+- `GET /api/markets`: Get a list of markets with optional filtering and pagination
+
+### Rates
+
+- `GET /api/rates`: Get a list of conversion rates
+- `GET /api/rates/{slug}`: Get a specific conversion rate
+
+## Installation and Setup
+
+### Prerequisites
+
+- Python 3.8 or higher
+
+### Installation
+
+1. Clone the repository:
+   ```bash
+   git clone <repository-url>
+   cd cryptocurrency-data-service
+   ```
+
+2. Install dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+3. Set up environment variables (optional):
+   ```bash
+   # Create a .env file
+   COINCAP_API_KEY=your_api_key
+   COINCAP_API_BASE_URL=https://rest.coincap.io/v3
+   ```
+
+4. Run database migrations:
+   ```bash
+   alembic upgrade head
+   ```
+
+### Running the Application
+
+Start the server with:
+
+```bash
+uvicorn main:app --reload
+```
+
+The API will be available at http://localhost:8000
+
+## API Documentation
+
+Once the server is running, you can access the API documentation at:
+
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+
+## Data Sources
+
+This service uses the [CoinCap API v3](https://rest.coincap.io/v3) to provide cryptocurrency data. The API key is required for production use.
+
+## License
+
+[MIT](LICENSE)

alembic.ini

@@ -0,0 +1,106 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to migrations/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL - Using absolute path as required
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

app/api/routers/assets.py

@@ -0,0 +1,124 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import List, Optional
+import logging
+from app.database import get_db
+from app.schemas.assets import (
+    AssetResponse, SingleAssetResponse, AssetHistoryResponse, 
+    AssetMarketsResponse, ErrorResponse
+)
+from app.services.coincap_client import CoinCapClient
+
+router = APIRouter(prefix="/assets", tags=["Assets"])
+logger = logging.getLogger(__name__)
+
+# Initialize client
+client = CoinCapClient()
+
+@router.get(
+    "", 
+    response_model=AssetResponse,
+    summary="Get list of assets", 
+    description="Retrieve a list of assets with optional filters"
+)
+async def get_assets(
+    search: Optional[str] = None,
+    ids: Optional[str] = None,
+    limit: Optional[int] = Query(100, ge=1, le=2000),
+    offset: Optional[int] = Query(0, ge=0),
+    db: Session = Depends(get_db)
+):
+    try:
+        response = await client.get_assets(search=search, ids=ids, limit=limit, offset=offset)
+        return response
+    except Exception as e:
+        logger.error(f"Error fetching assets: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get(
+    "/{slug}",
+    response_model=SingleAssetResponse,
+    responses={404: {"model": ErrorResponse}},
+    summary="Get a specific asset",
+    description="Retrieve details for a specific asset by its slug"
+)
+async def get_asset(slug: str, db: Session = Depends(get_db)):
+    try:
+        response = await client.get_asset(slug)
+        if not response.get("data"):
+            raise HTTPException(status_code=404, detail=f"{slug} not found")
+        return response
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error fetching asset {slug}: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get(
+    "/{slug}/markets",
+    response_model=AssetMarketsResponse,
+    responses={404: {"model": ErrorResponse}},
+    summary="Get markets for an asset",
+    description="Retrieve markets for a specific asset"
+)
+async def get_asset_markets(
+    slug: str,
+    limit: Optional[int] = Query(100, ge=1, le=2000),
+    offset: Optional[int] = Query(0, ge=0),
+    db: Session = Depends(get_db)
+):
+    try:
+        response = await client.get_asset_markets(slug, limit=limit, offset=offset)
+        if not response.get("data") and isinstance(response.get("data"), list):
+            raise HTTPException(status_code=404, detail=f"{slug} not found")
+        return response
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error fetching markets for asset {slug}: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get(
+    "/{slug}/history",
+    response_model=AssetHistoryResponse,
+    responses={404: {"model": ErrorResponse}},
+    summary="Get historical data for an asset",
+    description="Retrieve historical price data for a specific asset"
+)
+async def get_asset_history(
+    slug: str,
+    interval: str = Query(..., description="Time interval (m1, m5, m15, m30, h1, h2, h6, h12, d1)"),
+    start: Optional[int] = None,
+    end: Optional[int] = None,
+    db: Session = Depends(get_db)
+):
+    # Validate interval
+    valid_intervals = ["m1", "m5", "m15", "m30", "h1", "h2", "h6", "h12", "d1"]
+    if interval not in valid_intervals:
+        raise HTTPException(
+            status_code=400, 
+            detail=f"Invalid interval. Must be one of: {', '.join(valid_intervals)}"
+        )
+    
+    # Validate start and end
+    if (start is None and end is not None) or (start is not None and end is None):
+        raise HTTPException(
+            status_code=400,
+            detail="Both start and end must be provided together or neither should be provided"
+        )
+    
+    try:
+        response = await client.get_asset_history(
+            slug, interval=interval, start=start, end=end
+        )
+        if not response.get("data") and isinstance(response.get("data"), list):
+            raise HTTPException(status_code=404, detail=f"{slug} not found")
+        return response
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error fetching history for asset {slug}: {e}")
+        raise HTTPException(status_code=500, detail=str(e))

app/api/routers/exchanges.py

@@ -0,0 +1,53 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import List, Optional
+import logging
+from app.database import get_db
+from app.schemas.exchanges import (
+    ExchangesResponse, SingleExchangeResponse, ErrorResponse
+)
+from app.services.coincap_client import CoinCapClient
+
+router = APIRouter(prefix="/exchanges", tags=["Exchanges"])
+logger = logging.getLogger(__name__)
+
+# Initialize client
+client = CoinCapClient()
+
+@router.get(
+    "", 
+    response_model=ExchangesResponse,
+    summary="Get list of exchanges", 
+    description="Retrieve a list of exchanges with optional pagination"
+)
+async def get_exchanges(
+    limit: Optional[int] = Query(10, ge=1, le=2000),
+    offset: Optional[int] = Query(0, ge=0),
+    db: Session = Depends(get_db)
+):
+    try:
+        response = await client.get_exchanges(limit=limit, offset=offset)
+        return response
+    except Exception as e:
+        logger.error(f"Error fetching exchanges: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get(
+    "/{exchange_id}",
+    response_model=SingleExchangeResponse,
+    responses={404: {"model": ErrorResponse}},
+    summary="Get a specific exchange",
+    description="Retrieve details for a specific exchange"
+)
+async def get_exchange(exchange_id: str, db: Session = Depends(get_db)):
+    try:
+        response = await client.get_exchange(exchange_id)
+        if not response.get("data"):
+            raise HTTPException(status_code=404, detail=f"Exchange {exchange_id} not found")
+        return response
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error fetching exchange {exchange_id}: {e}")
+        raise HTTPException(status_code=500, detail=str(e))

app/api/routers/health.py

@@ -0,0 +1,40 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from app.database import get_db
+import httpx
+from app.config import COINCAP_API_BASE_URL, COINCAP_API_KEY
+
+router = APIRouter(tags=["Health"])
+
+@router.get("/health", summary="Check service health")
+async def health_check(db: Session = Depends(get_db)):
+    """
+    Health check endpoint that verifies:
+    - Database connection
+    - External API connectivity
+    """
+    # Check database connection
+    try:
+        db.execute("SELECT 1")
+        db_status = "healthy"
+    except Exception as e:
+        db_status = f"unhealthy: {str(e)}"
+    
+    # Check CoinCap API connection
+    try:
+        async with httpx.AsyncClient() as client:
+            response = await client.get(
+                f"{COINCAP_API_BASE_URL}/assets", 
+                params={"apiKey": COINCAP_API_KEY, "limit": 1}
+            )
+            response.raise_for_status()
+            api_status = "healthy"
+    except Exception as e:
+        api_status = f"unhealthy: {str(e)}"
+    
+    return {
+        "status": "ok" if db_status == "healthy" and api_status == "healthy" else "degraded",
+        "database": db_status,
+        "coincap_api": api_status,
+        "version": "0.1.0"
+    }

app/api/routers/markets.py

@@ -0,0 +1,48 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import List, Optional
+import logging
+from app.database import get_db
+from app.schemas.markets import MarketsResponse, ErrorResponse
+from app.services.coincap_client import CoinCapClient
+
+router = APIRouter(prefix="/markets", tags=["Markets"])
+logger = logging.getLogger(__name__)
+
+# Initialize client
+client = CoinCapClient()
+
+@router.get(
+    "", 
+    response_model=MarketsResponse,
+    summary="Get list of markets", 
+    description="Retrieve a list of markets with optional filters"
+)
+async def get_markets(
+    exchange_id: Optional[str] = None,
+    base_symbol: Optional[str] = None,
+    base_id: Optional[str] = None,
+    quote_symbol: Optional[str] = None,
+    quote_id: Optional[str] = None,
+    asset_symbol: Optional[str] = None,
+    asset_id: Optional[str] = None,
+    limit: Optional[int] = Query(10, ge=1, le=2000),
+    offset: Optional[int] = Query(0, ge=0),
+    db: Session = Depends(get_db)
+):
+    try:
+        response = await client.get_markets(
+            exchange_id=exchange_id,
+            base_symbol=base_symbol,
+            base_id=base_id,
+            quote_symbol=quote_symbol,
+            quote_id=quote_id,
+            asset_symbol=asset_symbol,
+            asset_id=asset_id,
+            limit=limit,
+            offset=offset
+        )
+        return response
+    except Exception as e:
+        logger.error(f"Error fetching markets: {e}")
+        raise HTTPException(status_code=500, detail=str(e))

app/api/routers/rates.py

@@ -0,0 +1,52 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import List, Optional
+import logging
+from app.database import get_db
+from app.schemas.rates import (
+    RatesResponse, SingleRateResponse, ErrorResponse
+)
+from app.services.coincap_client import CoinCapClient
+
+router = APIRouter(prefix="/rates", tags=["Rates"])
+logger = logging.getLogger(__name__)
+
+# Initialize client
+client = CoinCapClient()
+
+@router.get(
+    "", 
+    response_model=RatesResponse,
+    summary="Get conversion rates", 
+    description="Retrieve a list of conversion rates with optional filtering"
+)
+async def get_rates(
+    ids: Optional[str] = None,
+    db: Session = Depends(get_db)
+):
+    try:
+        response = await client.get_rates(ids=ids)
+        return response
+    except Exception as e:
+        logger.error(f"Error fetching rates: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get(
+    "/{slug}",
+    response_model=SingleRateResponse,
+    responses={404: {"model": ErrorResponse}},
+    summary="Get a specific conversion rate",
+    description="Retrieve details for a specific conversion rate by its slug"
+)
+async def get_rate(slug: str, db: Session = Depends(get_db)):
+    try:
+        response = await client.get_rate(slug)
+        if not response.get("data"):
+            raise HTTPException(status_code=404, detail=f"Rate {slug} not found")
+        return response
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error fetching rate {slug}: {e}")
+        raise HTTPException(status_code=500, detail=str(e))

app/config.py

@@ -0,0 +1,13 @@
+import os
+from pathlib import Path
+from dotenv import load_dotenv
+
+# Load environment variables
+load_dotenv()
+
+# API configuration
+COINCAP_API_KEY = os.getenv("COINCAP_API_KEY", "b1afdeb4223dd63e8e26977c3539432eeaca0a7603c4655a7c9c57dadb40e7fe")
+COINCAP_API_BASE_URL = os.getenv("COINCAP_API_BASE_URL", "https://rest.coincap.io/v3")
+
+# Cache configuration
+CACHE_TIMEOUT = int(os.getenv("CACHE_TIMEOUT", 300))  # 5 minutes cache by default

app/database.py

@@ -0,0 +1,27 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from pathlib import Path
+
+# Database directory setup
+DB_DIR = Path("/app") / "storage" / "db"
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
+
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+# Dependency to get database session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/exceptions.py

@@ -0,0 +1,66 @@
+from fastapi import Request, status
+from fastapi.responses import JSONResponse
+from fastapi.exceptions import RequestValidationError
+from starlette.exceptions import HTTPException as StarletteHTTPException
+import logging
+import time
+
+logger = logging.getLogger(__name__)
+
+class CoinCapAPIException(Exception):
+    """Exception raised for CoinCap API errors."""
+    
+    def __init__(self, status_code: int, detail: str):
+        self.status_code = status_code
+        self.detail = detail
+        super().__init__(self.detail)
+
+
+async def validation_exception_handler(request: Request, exc: RequestValidationError):
+    """Handle validation errors."""
+    logger.error(f"Validation error: {exc}")
+    return JSONResponse(
+        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+        content={
+            "error": "Validation Error",
+            "detail": exc.errors(),
+            "timestamp": int(time.time() * 1000)
+        }
+    )
+
+
+async def http_exception_handler(request: Request, exc: StarletteHTTPException):
+    """Handle HTTP exceptions."""
+    logger.error(f"HTTP error: {exc.status_code} - {exc.detail}")
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "error": exc.detail,
+            "timestamp": int(time.time() * 1000)
+        }
+    )
+
+
+async def coincap_api_exception_handler(request: Request, exc: CoinCapAPIException):
+    """Handle CoinCap API exceptions."""
+    logger.error(f"CoinCap API error: {exc.status_code} - {exc.detail}")
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "error": exc.detail,
+            "timestamp": int(time.time() * 1000)
+        }
+    )
+
+
+async def general_exception_handler(request: Request, exc: Exception):
+    """Handle all other exceptions."""
+    logger.error(f"Unhandled exception: {exc}", exc_info=True)
+    return JSONResponse(
+        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+        content={
+            "error": "Internal Server Error",
+            "detail": str(exc),
+            "timestamp": int(time.time() * 1000)
+        }
+    )

app/models/__init__.py

@@ -0,0 +1,6 @@
+from app.models.asset import Asset, AssetPriceHistory
+from app.models.exchange import Exchange
+from app.models.market import Market
+from app.models.rate import Rate
+
+# Import all models here for Alembic to discover them

app/models/asset.py

@@ -0,0 +1,45 @@
+from sqlalchemy import Column, String, Float, Integer, DateTime, ForeignKey, Boolean
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.database import Base
+
+class Asset(Base):
+    __tablename__ = "assets"
+    
+    id = Column(String, primary_key=True)  # Slug of the asset (e.g., "bitcoin")
+    rank = Column(Integer)
+    symbol = Column(String, index=True)
+    name = Column(String, index=True)
+    supply = Column(Float)
+    max_supply = Column(Float, nullable=True)
+    market_cap_usd = Column(Float)
+    volume_usd_24hr = Column(Float)
+    price_usd = Column(Float)
+    change_percent_24hr = Column(Float, nullable=True)
+    vwap_24hr = Column(Float, nullable=True)
+    explorer = Column(String, nullable=True)
+    
+    # Last time the data was updated
+    last_updated = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    
+    # Relationships
+    price_history = relationship("AssetPriceHistory", back_populates="asset", cascade="all, delete-orphan")
+    
+    def __repr__(self):
+        return f"<Asset {self.symbol}: {self.name}>"
+
+
+class AssetPriceHistory(Base):
+    __tablename__ = "asset_price_history"
+    
+    id = Column(Integer, primary_key=True)
+    asset_id = Column(String, ForeignKey("assets.id", ondelete="CASCADE"), index=True)
+    price_usd = Column(Float)
+    timestamp = Column(DateTime(timezone=True), index=True)
+    interval = Column(String)  # m1, m5, m15, m30, h1, h2, h6, h12, d1
+    
+    # Relationship
+    asset = relationship("Asset", back_populates="price_history")
+    
+    def __repr__(self):
+        return f"<AssetPriceHistory {self.asset_id} @ {self.timestamp}>"

app/models/exchange.py

@@ -0,0 +1,23 @@
+from sqlalchemy import Column, String, Float, Integer, DateTime, Boolean
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+from app.database import Base
+
+class Exchange(Base):
+    __tablename__ = "exchanges"
+    
+    id = Column(String, primary_key=True)  # exchange_id from the API
+    name = Column(String, index=True)
+    rank = Column(Integer, index=True)
+    percent_total_volume = Column(Float, nullable=True)
+    volume_usd = Column(Float, nullable=True)
+    trading_pairs = Column(Integer)
+    socket = Column(Boolean, nullable=True)
+    exchange_url = Column(String, nullable=True)
+    updated_timestamp = Column(Integer, nullable=True)
+    
+    # Last time the data was updated in our database
+    last_updated = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    
+    def __repr__(self):
+        return f"<Exchange {self.name} (Rank: {self.rank})>"

app/models/market.py

@@ -0,0 +1,27 @@
+from sqlalchemy import Column, String, Float, Integer, DateTime, ForeignKey, Boolean
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+from app.database import Base
+
+class Market(Base):
+    __tablename__ = "markets"
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    exchange_id = Column(String, index=True)
+    rank = Column(Integer, nullable=True)
+    base_id = Column(String, index=True)  # Asset slug for base
+    quote_id = Column(String, index=True)  # Asset slug for quote
+    base_symbol = Column(String, index=True)  # e.g., BTC
+    quote_symbol = Column(String, index=True)  # e.g., USD
+    price_quote = Column(Float)  # Price in quote currency
+    price_usd = Column(Float)  # Price in USD
+    volume_usd_24hr = Column(Float)
+    percent_exchange_volume = Column(Float, nullable=True)
+    trades_count_24hr = Column(Integer, nullable=True)
+    updated_timestamp = Column(Integer, nullable=True)
+    
+    # Last time the data was updated in our database
+    last_updated = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    
+    def __repr__(self):
+        return f"<Market {self.base_symbol}/{self.quote_symbol} on {self.exchange_id}>"

app/models/rate.py

@@ -0,0 +1,18 @@
+from sqlalchemy import Column, String, Float, DateTime
+from sqlalchemy.sql import func
+from app.database import Base
+
+class Rate(Base):
+    __tablename__ = "rates"
+    
+    id = Column(String, primary_key=True)  # Rate ID (slug)
+    symbol = Column(String, index=True)  # Currency symbol (e.g., BTC, USD)
+    currency_symbol = Column(String, nullable=True)  # Display symbol (e.g., $, ₿)
+    type = Column(String)  # crypto or fiat
+    rate_usd = Column(Float)  # Conversion rate to USD
+    
+    # Last time the data was updated
+    last_updated = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    
+    def __repr__(self):
+        return f"<Rate {self.symbol} ({self.type}): {self.rate_usd} USD>"

app/schemas/assets.py

@@ -0,0 +1,71 @@
+from pydantic import BaseModel, Field
+from typing import List, Optional, Dict, Any
+from datetime import datetime
+
+
+class AssetBase(BaseModel):
+    id: str
+    rank: Optional[str] = None
+    symbol: str
+    name: str
+    supply: Optional[str] = None
+    max_supply: Optional[str] = None
+    market_cap_usd: Optional[str] = None
+    volume_usd_24hr: Optional[str] = None
+    price_usd: Optional[str] = None
+    change_percent_24hr: Optional[str] = None
+    vwap_24hr: Optional[str] = None
+    explorer: Optional[str] = None
+
+
+class AssetCreate(AssetBase):
+    pass
+
+
+class AssetInDB(AssetBase):
+    last_updated: datetime
+
+    class Config:
+        orm_mode = True
+
+
+class AssetResponse(BaseModel):
+    timestamp: int
+    data: List[AssetBase]
+
+
+class SingleAssetResponse(BaseModel):
+    timestamp: int
+    data: AssetBase
+
+
+class AssetHistoryPoint(BaseModel):
+    price_usd: str
+    time: int  # Unix timestamp in milliseconds
+    date: datetime
+
+
+class AssetHistoryResponse(BaseModel):
+    timestamp: int
+    data: List[AssetHistoryPoint]
+
+
+class AssetMarket(BaseModel):
+    exchange_id: str
+    base_id: str
+    quote_id: str
+    base_symbol: str
+    quote_symbol: str
+    volume_usd_24hr: str
+    price_usd: str
+    volume_percent: str
+
+
+class AssetMarketsResponse(BaseModel):
+    timestamp: int
+    data: List[AssetMarket]
+
+
+class ErrorResponse(BaseModel):
+    error: str
+    timestamp: Optional[int] = None

app/schemas/exchanges.py

@@ -0,0 +1,41 @@
+from pydantic import BaseModel, Field
+from typing import List, Optional, Dict, Any
+from datetime import datetime
+
+
+class ExchangeBase(BaseModel):
+    exchange_id: str
+    name: str
+    rank: str
+    percent_total_volume: Optional[str] = None
+    volume_usd: Optional[str] = None
+    trading_pairs: str
+    socket: Optional[bool] = None
+    exchange_url: Optional[str] = None
+    updated: int
+
+
+class ExchangeCreate(ExchangeBase):
+    pass
+
+
+class ExchangeInDB(ExchangeBase):
+    last_updated: datetime
+
+    class Config:
+        orm_mode = True
+
+
+class ExchangesResponse(BaseModel):
+    data: List[ExchangeBase]
+    timestamp: int
+
+
+class SingleExchangeResponse(BaseModel):
+    data: ExchangeBase
+    timestamp: int
+
+
+class ErrorResponse(BaseModel):
+    error: str
+    timestamp: Optional[int] = None

app/schemas/markets.py

@@ -0,0 +1,40 @@
+from pydantic import BaseModel, Field
+from typing import List, Optional, Dict, Any
+from datetime import datetime
+
+
+class MarketBase(BaseModel):
+    exchange_id: str
+    rank: Optional[str] = None
+    base_symbol: str
+    base_id: str
+    quote_symbol: str
+    quote_id: str
+    price_quote: str
+    price_usd: str
+    volume_usd_24hr: str
+    percent_exchange_volume: str
+    trades_count_24hr: Optional[str] = None
+    updated: int
+
+
+class MarketCreate(MarketBase):
+    pass
+
+
+class MarketInDB(MarketBase):
+    id: int
+    last_updated: datetime
+
+    class Config:
+        orm_mode = True
+
+
+class MarketsResponse(BaseModel):
+    data: List[MarketBase]
+    timestamp: int
+
+
+class ErrorResponse(BaseModel):
+    error: str
+    timestamp: Optional[int] = None

app/schemas/rates.py

@@ -0,0 +1,37 @@
+from pydantic import BaseModel, Field
+from typing import List, Optional, Dict, Any
+from datetime import datetime
+
+
+class RateBase(BaseModel):
+    id: str
+    symbol: str
+    currency_symbol: Optional[str] = None
+    type: str
+    rate_usd: str
+
+
+class RateCreate(RateBase):
+    pass
+
+
+class RateInDB(RateBase):
+    last_updated: datetime
+
+    class Config:
+        orm_mode = True
+
+
+class RatesResponse(BaseModel):
+    data: List[RateBase]
+    timestamp: int
+
+
+class SingleRateResponse(BaseModel):
+    data: RateBase
+    timestamp: int
+
+
+class ErrorResponse(BaseModel):
+    error: str
+    timestamp: Optional[int] = None

app/services/coincap_client.py

@@ -0,0 +1,124 @@
+import httpx
+import logging
+from typing import Dict, List, Optional, Any, Union
+from app.config import COINCAP_API_BASE_URL, COINCAP_API_KEY
+
+logger = logging.getLogger(__name__)
+
+class CoinCapClient:
+    """Client for interacting with the CoinCap API v3"""
+    
+    def __init__(self, api_key: str = COINCAP_API_KEY, base_url: str = COINCAP_API_BASE_URL):
+        self.api_key = api_key
+        self.base_url = base_url
+        
+    async def _request(self, method: str, endpoint: str, params: Optional[Dict[str, Any]] = None) -> Dict:
+        """Make a request to the CoinCap API
+
+        Args:
+            method: HTTP method (GET, POST, etc.)
+            endpoint: API endpoint (without base URL)
+            params: Query parameters
+
+        Returns:
+            API response as dictionary
+        """
+        if params is None:
+            params = {}
+            
+        # Add API key to all requests
+        params['apiKey'] = self.api_key
+        
+        url = f"{self.base_url}{endpoint}"
+        
+        try:
+            async with httpx.AsyncClient() as client:
+                response = await client.request(method, url, params=params)
+                response.raise_for_status()
+                return response.json()
+        except httpx.HTTPStatusError as e:
+            logger.error(f"HTTP error occurred: {e}")
+            if e.response.status_code == 404:
+                # Return empty data for 404 errors
+                return {"data": []}
+            raise
+        except Exception as e:
+            logger.error(f"Error in CoinCap API request: {e}")
+            raise
+    
+    # Assets endpoints
+    async def get_assets(self, search: Optional[str] = None, 
+                         ids: Optional[str] = None,
+                         limit: Optional[int] = None, 
+                         offset: Optional[int] = None) -> Dict:
+        """Get list of assets with optional filters"""
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self'] and v is not None}
+        return await self._request("GET", "/assets", params)
+    
+    async def get_asset(self, slug: str) -> Dict:
+        """Get information about a specific asset by slug"""
+        return await self._request("GET", f"/assets/{slug}")
+    
+    async def get_asset_markets(self, slug: str, 
+                               limit: Optional[int] = None,
+                               offset: Optional[int] = None) -> Dict:
+        """Get markets for a specific asset"""
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self', 'slug'] and v is not None}
+        return await self._request("GET", f"/assets/{slug}/markets", params)
+    
+    async def get_asset_history(self, slug: str, 
+                               interval: str,
+                               start: Optional[int] = None,
+                               end: Optional[int] = None) -> Dict:
+        """Get historical data for a specific asset
+        
+        Args:
+            slug: Asset slug
+            interval: Time interval (m1, m5, m15, m30, h1, h2, h6, h12, d1)
+            start: Start time in milliseconds
+            end: End time in milliseconds
+        """
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self', 'slug'] and v is not None}
+        return await self._request("GET", f"/assets/{slug}/history", params)
+    
+    # Exchanges endpoints
+    async def get_exchanges(self, limit: Optional[int] = None,
+                           offset: Optional[int] = None) -> Dict:
+        """Get list of exchanges"""
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self'] and v is not None}
+        return await self._request("GET", "/exchanges", params)
+    
+    async def get_exchange(self, exchange_id: str) -> Dict:
+        """Get information about a specific exchange"""
+        return await self._request("GET", f"/exchanges/{exchange_id}")
+    
+    # Markets endpoints
+    async def get_markets(self, 
+                         exchange_id: Optional[str] = None,
+                         base_symbol: Optional[str] = None,
+                         base_id: Optional[str] = None,
+                         quote_symbol: Optional[str] = None,
+                         quote_id: Optional[str] = None,
+                         asset_symbol: Optional[str] = None,
+                         asset_id: Optional[str] = None,
+                         limit: Optional[int] = None,
+                         offset: Optional[int] = None) -> Dict:
+        """Get list of markets with optional filters"""
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self'] and v is not None}
+        return await self._request("GET", "/markets", params)
+    
+    # Rates endpoints
+    async def get_rates(self, ids: Optional[str] = None) -> Dict:
+        """Get conversion rates, optionally filtered by comma-separated slugs"""
+        params = {k: v for k, v in locals().items() 
+                 if k not in ['self'] and v is not None}
+        return await self._request("GET", "/rates", params)
+    
+    async def get_rate(self, slug: str) -> Dict:
+        """Get a specific conversion rate by slug"""
+        return await self._request("GET", f"/rates/{slug}")

app/utils/logging.py

@@ -0,0 +1,43 @@
+import logging
+import sys
+from pathlib import Path
+from typing import Optional
+
+def setup_logging(log_level: str = "INFO", log_file: Optional[Path] = None):
+    """Configure logging for the application.
+    
+    Args:
+        log_level: Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
+        log_file: Optional path to log file
+    """
+    # Set up logging format
+    log_format = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+    
+    # Configure logging level
+    level = getattr(logging, log_level.upper())
+    
+    # Configure root logger
+    handlers = [logging.StreamHandler(sys.stdout)]
+    
+    # Add file handler if specified
+    if log_file:
+        log_file.parent.mkdir(parents=True, exist_ok=True)
+        file_handler = logging.FileHandler(log_file)
+        file_handler.setFormatter(logging.Formatter(log_format))
+        handlers.append(file_handler)
+    
+    # Configure logging
+    logging.basicConfig(
+        level=level,
+        format=log_format,
+        handlers=handlers
+    )
+    
+    # Set httpx logging to WARNING to reduce noise
+    logging.getLogger("httpx").setLevel(logging.WARNING)
+    
+    # Set uvicorn access logs to WARNING to reduce noise
+    logging.getLogger("uvicorn.access").setLevel(logging.WARNING)
+    
+    # Log startup message
+    logging.info(f"Logging initialized at {log_level} level")

main.py

@@ -0,0 +1,79 @@
+from fastapi import FastAPI, Depends, HTTPException, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.exceptions import RequestValidationError
+import uvicorn
+from pathlib import Path
+from sqlalchemy.orm import Session
+import logging
+import time
+
+from app.database import get_db, Base, engine
+from app.api.routers import assets, exchanges, markets, rates, health
+from app.exceptions import (
+    CoinCapAPIException, 
+    validation_exception_handler, 
+    http_exception_handler, 
+    coincap_api_exception_handler, 
+    general_exception_handler
+)
+from app.utils.logging import setup_logging
+from starlette.exceptions import HTTPException as StarletteHTTPException
+
+# Setup logging
+setup_logging(log_level="INFO")
+logger = logging.getLogger(__name__)
+
+# Create the FastAPI app
+app = FastAPI(
+    title="Cryptocurrency Data Service",
+    description="Backend service for cryptocurrency data from CoinCap API",
+    version="0.1.0",
+)
+
+# Register exception handlers
+app.add_exception_handler(RequestValidationError, validation_exception_handler)
+app.add_exception_handler(StarletteHTTPException, http_exception_handler)
+app.add_exception_handler(CoinCapAPIException, coincap_api_exception_handler)
+app.add_exception_handler(Exception, general_exception_handler)
+
+# CORS middleware configuration
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Request timing middleware
+@app.middleware("http")
+async def add_process_time_header(request: Request, call_next):
+    start_time = time.time()
+    response = await call_next(request)
+    process_time = time.time() - start_time
+    response.headers["X-Process-Time"] = str(process_time)
+    logger.debug(f"Request to {request.url.path} processed in {process_time:.4f} seconds")
+    return response
+
+# Include routers
+app.include_router(health.router)
+app.include_router(assets.router, prefix="/api")
+app.include_router(exchanges.router, prefix="/api")
+app.include_router(markets.router, prefix="/api")
+app.include_router(rates.router, prefix="/api")
+
+# Startup event
+@app.on_event("startup")
+async def startup_event():
+    logger.info("Starting up Cryptocurrency Data Service")
+    # Create database tables at startup
+    # In production, you should use Alembic migrations instead
+    # Base.metadata.create_all(bind=engine)
+
+# Shutdown event
+@app.on_event("shutdown")
+async def shutdown_event():
+    logger.info("Shutting down Cryptocurrency Data Service")
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration with an async dbapi.

migrations/env.py

@@ -0,0 +1,79 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+from app.database import Base
+import app.models  # Import all models to register them with the Base class
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

migrations/versions/001_initial_schema.py

@@ -0,0 +1,133 @@
+"""Initial schema
+
+Revision ID: 001
+Revises: 
+Create Date: 2025-05-14
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '001'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create assets table
+    op.create_table(
+        'assets',
+        sa.Column('id', sa.String(), nullable=False),
+        sa.Column('rank', sa.Integer(), nullable=True),
+        sa.Column('symbol', sa.String(), nullable=True),
+        sa.Column('name', sa.String(), nullable=True),
+        sa.Column('supply', sa.Float(), nullable=True),
+        sa.Column('max_supply', sa.Float(), nullable=True),
+        sa.Column('market_cap_usd', sa.Float(), nullable=True),
+        sa.Column('volume_usd_24hr', sa.Float(), nullable=True),
+        sa.Column('price_usd', sa.Float(), nullable=True),
+        sa.Column('change_percent_24hr', sa.Float(), nullable=True),
+        sa.Column('vwap_24hr', sa.Float(), nullable=True),
+        sa.Column('explorer', sa.String(), nullable=True),
+        sa.Column('last_updated', sa.DateTime(timezone=True), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_assets_name'), 'assets', ['name'], unique=False)
+    op.create_index(op.f('ix_assets_symbol'), 'assets', ['symbol'], unique=False)
+    
+    # Create asset_price_history table
+    op.create_table(
+        'asset_price_history',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('asset_id', sa.String(), nullable=True),
+        sa.Column('price_usd', sa.Float(), nullable=True),
+        sa.Column('timestamp', sa.DateTime(timezone=True), nullable=True),
+        sa.Column('interval', sa.String(), nullable=True),
+        sa.ForeignKeyConstraint(['asset_id'], ['assets.id'], ondelete='CASCADE'),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_asset_price_history_asset_id'), 'asset_price_history', ['asset_id'], unique=False)
+    op.create_index(op.f('ix_asset_price_history_timestamp'), 'asset_price_history', ['timestamp'], unique=False)
+    
+    # Create exchanges table
+    op.create_table(
+        'exchanges',
+        sa.Column('id', sa.String(), nullable=False),
+        sa.Column('name', sa.String(), nullable=True),
+        sa.Column('rank', sa.Integer(), nullable=True),
+        sa.Column('percent_total_volume', sa.Float(), nullable=True),
+        sa.Column('volume_usd', sa.Float(), nullable=True),
+        sa.Column('trading_pairs', sa.Integer(), nullable=True),
+        sa.Column('socket', sa.Boolean(), nullable=True),
+        sa.Column('exchange_url', sa.String(), nullable=True),
+        sa.Column('updated_timestamp', sa.Integer(), nullable=True),
+        sa.Column('last_updated', sa.DateTime(timezone=True), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_exchanges_name'), 'exchanges', ['name'], unique=False)
+    op.create_index(op.f('ix_exchanges_rank'), 'exchanges', ['rank'], unique=False)
+    
+    # Create markets table
+    op.create_table(
+        'markets',
+        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column('exchange_id', sa.String(), nullable=True),
+        sa.Column('rank', sa.Integer(), nullable=True),
+        sa.Column('base_id', sa.String(), nullable=True),
+        sa.Column('quote_id', sa.String(), nullable=True),
+        sa.Column('base_symbol', sa.String(), nullable=True),
+        sa.Column('quote_symbol', sa.String(), nullable=True),
+        sa.Column('price_quote', sa.Float(), nullable=True),
+        sa.Column('price_usd', sa.Float(), nullable=True),
+        sa.Column('volume_usd_24hr', sa.Float(), nullable=True),
+        sa.Column('percent_exchange_volume', sa.Float(), nullable=True),
+        sa.Column('trades_count_24hr', sa.Integer(), nullable=True),
+        sa.Column('updated_timestamp', sa.Integer(), nullable=True),
+        sa.Column('last_updated', sa.DateTime(timezone=True), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_markets_base_id'), 'markets', ['base_id'], unique=False)
+    op.create_index(op.f('ix_markets_base_symbol'), 'markets', ['base_symbol'], unique=False)
+    op.create_index(op.f('ix_markets_exchange_id'), 'markets', ['exchange_id'], unique=False)
+    op.create_index(op.f('ix_markets_quote_id'), 'markets', ['quote_id'], unique=False)
+    op.create_index(op.f('ix_markets_quote_symbol'), 'markets', ['quote_symbol'], unique=False)
+    
+    # Create rates table
+    op.create_table(
+        'rates',
+        sa.Column('id', sa.String(), nullable=False),
+        sa.Column('symbol', sa.String(), nullable=True),
+        sa.Column('currency_symbol', sa.String(), nullable=True),
+        sa.Column('type', sa.String(), nullable=True),
+        sa.Column('rate_usd', sa.Float(), nullable=True),
+        sa.Column('last_updated', sa.DateTime(timezone=True), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_rates_symbol'), 'rates', ['symbol'], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_rates_symbol'), table_name='rates')
+    op.drop_table('rates')
+    
+    op.drop_index(op.f('ix_markets_quote_symbol'), table_name='markets')
+    op.drop_index(op.f('ix_markets_quote_id'), table_name='markets')
+    op.drop_index(op.f('ix_markets_exchange_id'), table_name='markets')
+    op.drop_index(op.f('ix_markets_base_symbol'), table_name='markets')
+    op.drop_index(op.f('ix_markets_base_id'), table_name='markets')
+    op.drop_table('markets')
+    
+    op.drop_index(op.f('ix_exchanges_rank'), table_name='exchanges')
+    op.drop_index(op.f('ix_exchanges_name'), table_name='exchanges')
+    op.drop_table('exchanges')
+    
+    op.drop_index(op.f('ix_asset_price_history_timestamp'), table_name='asset_price_history')
+    op.drop_index(op.f('ix_asset_price_history_asset_id'), table_name='asset_price_history')
+    op.drop_table('asset_price_history')
+    
+    op.drop_index(op.f('ix_assets_symbol'), table_name='assets')
+    op.drop_index(op.f('ix_assets_name'), table_name='assets')
+    op.drop_table('assets')

requirements.txt

@@ -0,0 +1,8 @@
+fastapi==0.104.0
+uvicorn==0.23.2
+sqlalchemy==2.0.22
+pydantic==2.4.2
+httpx==0.25.0
+python-dotenv==1.0.0
+alembic==1.12.1
+ruff==0.1.3