The backend component to interface with the smart contract.
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  1. from contextlib import asynccontextmanager
  2. from fastapi import FastAPI
  3. from fastapi.middleware.cors import CORSMiddleware
  4. from app.core.config import settings
  5. from app.api.v1.api import api_router
  6. from app.db.base import engine, Base
  7. async def init_db():
  8. async with engine.begin() as conn:
  9. await conn.run_sync(Base.metadata.create_all)
  10. @asynccontextmanager
  11. async def lifespan(application: FastAPI):
  12. await init_db()
  13. yield
  14. app = FastAPI(
  15. title=settings.PROJECT_NAME,
  16. version=settings.VERSION,
  17. description=settings.DESCRIPTION,
  18. openapi_url=f"{settings.API_V1_STR}/openapi.json",
  19. lifespan=lifespan,
  20. )
  21. # Set up CORS middleware
  22. app.add_middleware(
  23. CORSMiddleware,
  24. allow_origins=settings.ALLOWED_ORIGINS,
  25. allow_credentials=True,
  26. allow_methods=["*"],
  27. allow_headers=["*"],
  28. )
  29. # Include API router
  30. app.include_router(router=api_router, prefix=settings.API_V1_STR)
  31. if __name__ == "__main__":
  32. import uvicorn
  33. uvicorn.run("main:app", host="127.0.0.1", port=8000, reload=True)