Explicit assignment of user_message kwarg, disallow kwargs in general

Author: reedsa

tests/core/exceptions/test_exceptions.py

@@ -13,12 +13,12 @@ def test_web3exception_with_user_message():
 
 
 def test_web3exception_with_kwargs():
-    with pytest.raises(Web3Exception) as exception:
+    with pytest.raises(TypeError) as exception:
         raise Web3Exception(data={"message": "Unable to fulfill your request."})
-    assert exception.type is Web3Exception
-    assert exception.value.user_message is None
+    assert exception.type is TypeError
+    assert hasattr(exception.value, "data") is False
     assert (
-        exception.value.kwargs["data"]["message"] == "Unable to fulfill your request."
+        str(exception.value) == "__init__() got an unexpected keyword argument 'data'"
     )
 
 

web3/exceptions.py

@@ -34,11 +34,11 @@ def __init__(
         self,
         *args: Any,
         user_message: Optional[str] = None,
-        **kwargs: Any,
     ):
         super().__init__(*args)
+
         # Assign properties of Web3Exception
-        self.__dict__.update(locals())
+        self.user_message = user_message
 
 
 class BadFunctionCallOutput(Web3Exception):