Shards are attribute of StorageNode class

src/frostfs_testlib/hosting/interfaces.py

@@ -219,12 +219,22 @@ class Host(ABC):
         """
 
     @abstractmethod
-    def delete_pilorama(self, service_name: str) -> None:
+    def delete_file(self, file_path: str) -> None:
         """
-        Deletes all pilorama.db files in the node.
+        Deletes file with provided file path
 
         Args:
-            service_name: Name of storage node service.
+            file_path: full path to the file to delete
+
+        """
+
+    @abstractmethod
+    def is_file_exist(self, file_path: str) -> bool:
+        """
+        Checks if file exist
+
+        Args:
+            file_path: full path to the file to check
 
         """