[chore]: Separated Simbrella to bank calls

app/middlewares/app_id_checker.py

@@ -0,0 +1,20 @@
+from flask import request
+from app.helpers.response_helper import ResponseHelper
+from app.utils.logger import logger
+import os
+
+VALID_APP_IDS = os.getenv("VALID_APP_ID", "")
+
+def require_app_id():
+    """Middleware to check if App-ID is present and valid."""
+    app_id = request.headers.get("App-ID")
+
+    if not app_id:
+        logger.error("Unauthorized access: Missing App-ID.")
+        return ResponseHelper.unauthorized("Missing App-ID")
+
+    if app_id not in VALID_APP_IDS:
+        logger.error(f"Unauthorized access: Invalid App-ID {app_id}.")
+        return ResponseHelper.unauthorized("Invalid App-ID")
+
+    return None