Update main.py

main.py

@@ -6,20 +6,39 @@ import requests
 app = FastAPI()
 
 VERIFY_TOKEN = "my_secure_token"
-PAGE_ACCESS_TOKEN = "EAAJGMsgQEhMBO6ki2t52LMuZBsIUoL9o4E1SOMKGqNLX6qUIbSnZCo3nQjDNzZBf0vCTtm2gTXy8xTENSiVyWHiwe7EmXAXRhbQy9yr34EjMptTZAvmwGdqxmkH0qLJfwm3kZBdu5yQl57Dx1sh2xYYXOo7aOuhcVikyl91BMEaQpGopWbXrlxotIi3w525hVk1UxMAzkNlp08wptj1AZD"
+PAGE_ACCESS_TOKEN = "EAAJGMsgQEhMBO0FxGBA1ZBKVIM6HmYYDK9stTrz4XjgN7PDOnkgH3g5WScFZBIVp6ZBXEN4rEsRuelZChxDnELXfojjkXyw9WUcZBYevkinXRIYsdjGZAGQ6QK2MDmnlX6mW4tD4uKzcpKxaaRDzPFouM51Vn6Yx5tatqYJyPBd39z1391QtEzTWWp8CS1BXuBdAJ078l4QF1uQ1ybQ4k4eksZD"  # Replace after exchange
+APP_ID = "640133872226835"
+APP_SECRET = "01602f51d9aa49953064fda7c507ed7c"  # Replace with your actual secret
+REDIRECT_URI = "https://mr-help-binrushd-meta-authenticator.hf.space/webhook"
 
 @app.get("/webhook")
 async def verify_webhook(request: Request):
     params = request.query_params
+    code = params.get("code")
     mode = params.get("hub.mode")
     token = params.get("hub.verify_token")
     challenge = params.get("hub.challenge")
 
+    # OAuth2 token exchange logic
+    if code:
+        print(f"🔑 Received code: {code}")
+        token_url = "https://graph.facebook.com/v22.0/oauth/access_token"
+        token_params = {
+            "client_id": APP_ID,
+            "redirect_uri": REDIRECT_URI,
+            "client_secret": APP_SECRET,
+            "code": code
+        }
+        response = requests.get(token_url, params=token_params)
+        print("🎟️ Token Exchange Response:")
+        print(response.json())
+        return PlainTextResponse("Token exchange completed")
+
+    # Webhook verification logic
     if mode == "subscribe" and token == VERIFY_TOKEN:
         return PlainTextResponse(content=challenge)
     return PlainTextResponse(content="Verification failed", status_code=403)
 
-
 @app.post("/webhook")
 async def receive_webhook(request: Request):
     payload = await request.json()