firebase_setup.py

import os
import firebase_admin
from firebase_admin import credentials, storage

def init_firebase():
    if not firebase_admin._apps:
        cred = credentials.Certificate({
            "type": "service_account",
            "project_id": os.getenv("FIREBASE_PROJECT_ID"),
            "private_key_id": "ignored",
            "private_key": os.getenv("FIREBASE_PRIVATE_KEY").replace("\\n", "\n"),
            "client_email": os.getenv("FIREBASE_CLIENT_EMAIL"),
            "client_id": "ignored",
            "auth_uri": "https://accounts.google.com/o/oauth2/auth",
            "token_uri": "https://oauth2.googleapis.com/token",
            "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
            "client_x509_cert_url": f"https://www.googleapis.com/robot/v1/metadata/x509/{os.getenv('FIREBASE_CLIENT_EMAIL').replace('@', '%40')}"
        })

        firebase_admin.initialize_app(cred, {
            'storageBucket': f"{os.getenv('FIREBASE_PROJECT_ID')}.appspot.com"
        })