fix: adding chainfrontendnode

src/backend/langflow/interface/chains/base.py

@@ -1,9 +1,10 @@
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Type
 
 from langflow.custom.customs import get_custom_nodes
 from langflow.interface.base import LangChainTypeCreator
 from langflow.interface.custom_lists import chain_type_to_cls_dict
 from langflow.settings import settings
+from langflow.template.nodes import ChainFrontendNode
 from langflow.utils.util import build_template_from_class
 
 # Assuming necessary imports for Field, Template, and FrontendNode classes
@@ -12,6 +13,10 @@ from langflow.utils.util import build_template_from_class
 class ChainCreator(LangChainTypeCreator):
     type_name: str = "chains"
 
+    @property
+    def frontend_node_class(self) -> Type[ChainFrontendNode]:
+        return ChainFrontendNode
+
     @property
     def type_to_loader_dict(self) -> Dict:
         if self.type_dict is None:

src/backend/langflow/template/nodes.py

@@ -289,3 +289,13 @@ class MemoryFrontendNode(FrontendNode):
             field.field_type = "int"
             field.value = 10
             field.display_name = "Memory Size"
+
+
+class ChainFrontendNode(FrontendNode):
+    @staticmethod
+    def format_field(field: TemplateField, name: Optional[str] = None) -> None:
+        FrontendNode.format_field(field, name)
+
+        if "key" in field.name:
+            field.password = False
+            field.show = False