mypy fixes

src/dipdup/indexes/evm_subsquid_events/index.py

@@ -153,7 +153,12 @@ async def _synchronize(self, sync_level: int) -> None:
                 topics.add(self.topics[typename][handler.name])
 
             # NOTE: Requesting logs by batches of datasource_config.http.batch_size or NODE_BATCH_SIZE.
-            batch_size = self.random_node._http_config.batch_size
+            evm_node: EvmNodeDatasource = self.random_node
+            if evm_node._http_config:
+                batch_size = evm_node._http_config.batch_size
+            else:
+                batch_size = NODE_BATCH_SIZE
+
             batch_first_level = first_level
             while batch_first_level <= sync_level:
                 # NOTE: We need block timestamps for each level, so fetch them separately and match with logs.