Update libs/langgraph-checkpoint-aws/langgraph_checkpoint_aws/store/dynamodb/base.py

Co-authored-by: Copilot <[email protected]>

Author: 5enxia

libs/langgraph-checkpoint-aws/langgraph_checkpoint_aws/store/dynamodb/base.py

@@ -633,10 +633,10 @@ def _refresh_ttl(self, pk: str, sk: str) -> None:
             pk: Partition key.
             sk: Sort key.
         """
-        if not self.ttl_config or not self.ttl_config.get("refresh_on_read"):
+        if not self.ttl_config or not self.ttl_config.refresh_on_read:
             return
 
-        default_ttl = self.ttl_config.get("default_ttl")
+        default_ttl = self.ttl_config.default_ttl
         if default_ttl is None:
             return