Добавлена обработка уведомлений через ручку

app/adapters/delivery_providers/cdek/client.py

@@ -12,6 +12,7 @@ from app.adapters.delivery_providers.cdek.auth import CDEKAuthClient
 from app.adapters.delivery_providers.cdek.mapper import map_cdek_response
 from app.adapters.delivery_providers.cdek.order_mapper import (
     CDEKOrderMappingError,
+    map_cdek_existing_order_response,
     map_cdek_order_request,
     map_cdek_order_response,
 )
@@ -123,6 +124,11 @@ class CDEKClient:
                 )
 
             if 400 <= response.status_code < 500:
+                existing_order_uuid = map_cdek_existing_order_response(
+                    _response_json_or_none(response)
+                )
+                if existing_order_uuid is not None:
+                    return existing_order_uuid
                 raise CDEKRequestError(
                     "CDEK order registration request was rejected with status "
                     f"{response.status_code}."
@@ -243,3 +249,10 @@ class CDEKProvider(DeliveryProvider):
 
     async def register_order(self, request: InitPaymentRequest) -> str:
         return await self._client.register_order(request)
+
+
+def _response_json_or_none(response: httpx.Response) -> object | None:
+    try:
+        return response.json()
+    except (TypeError, ValueError):
+        return None