Officially support wildcard type(*)

comfy_execution/validation.py

@@ -16,6 +16,10 @@ def validate_node_input(
       For example, if received_type is "STRING,BOOLEAN" and input_type is "STRING,INT",
       this will return True.
     """
+    # If either type is *, we allow any type
+    if any(t == "*" for t in [received_type, input_type]):
+        return True
+
     # If the types are exactly the same, we can return immediately
     if received_type == input_type:
         return True

tests-unit/execution_test/validate_node_input_test.py

@@ -73,3 +73,27 @@ def test_single_vs_multiple():
 def test_parametrized_cases(received, input_type, strict, expected):
     """Parametrized test cases for various scenarios"""
     assert validate_node_input(received, input_type, strict) == expected
+
+
+# https://github.com/FredBill1/comfyui-fb-utils/blob/main/core/types.py
+class AnyType(str):
+    """A special class that is always equal in not equal comparisons."""
+
+    def __eq__(self, _) -> bool:
+        return True
+
+    def __ne__(self, __value: object) -> bool:
+        return False
+
+
+def test_wildcard():
+    """Test behavior with wildcard"""
+    assert validate_node_input("*", "STRING,INT")
+    assert validate_node_input("STRING,INT", "*")
+    assert validate_node_input("*", "*")
+
+    # AnyType was previous wildcard hack used by many custom nodes.
+    # AnyType should be treated as a wildcard.
+    assert validate_node_input(AnyType(), "STRING,INT")
+    assert validate_node_input("STRING,INT", AnyType())
+    assert validate_node_input(AnyType(), AnyType())