fix cdek client

app/services/aggregator.py

@@ -6,7 +6,7 @@ import json
 from collections.abc import Callable, Iterable, Sequence
 from typing import Protocol
 
-from app.adapters.delivery_providers.base import DeliveryProvider
+from app.adapters.delivery_providers.base import DeliveryProvider, ProviderRequestError
 from app.domain.price import (
     DEFAULT_WEIGHT_ROUND_SCALE,
     NormalizedDeliveryRequest,
@@ -21,6 +21,10 @@ class AggregatorServiceError(RuntimeError):
     """Base exception for AggregatorService failures."""
 
 
+class InvalidDeliveryRequestError(AggregatorServiceError):
+    """Raised when provider rejects delivery request as invalid."""
+
+
 class PriceCacheProtocol(Protocol):
     async def get(self, key: str) -> object | None: ...
 
@@ -69,6 +73,19 @@ class AggregatorService:
             for price in provider_results
             if isinstance(price, DeliveryPrice)
         ]
+        provider_errors = [
+            error
+            for error in provider_results
+            if isinstance(error, Exception)
+        ]
+        if (
+            not successful_results
+            and provider_errors
+            and any(isinstance(error, ProviderRequestError) for error in provider_errors)
+        ):
+            raise InvalidDeliveryRequestError(
+                "Delivery request is invalid for configured providers."
+            )
         filtered_and_sorted = self._filter_and_sort_prices(successful_results)
         return [self._coerce_delivery_price(price) for price in filtered_and_sorted]