Update newsfragment README.md and add newsfragment for 2556

Author: fselmo

newsfragments/2556.breaking-change.rst

@@ -0,0 +1 @@
+Provide better messaging to wrong arguments for contract functions, especially for ``tuple`` argument types.

newsfragments/README.md

@@ -12,6 +12,8 @@ relevant to people working on the code itself.)
 * `bugfix`
 * `doc`
 * `misc`
+* `breaking-change`
+* `deprecation`
 
 So for example: `123.feature.rst`, `456.bugfix.rst`
 

tests/core/contracts/test_contract_call_interface.py

@@ -670,13 +670,15 @@ def test_function_multiple_error_diagnoses(w3, arg1, arg2, diagnosis):
 
 
 @pytest.mark.parametrize(
-    "address", (
+    "address",
+    (
         "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",  # checksummed
-        b'\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee',  # noqa: E501
-    )
+        b"\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee",  # noqa: E501
+    ),
 )
 def test_function_wrong_args_for_tuple_collapses_args_in_message(
-    address, tuple_contract,
+    address,
+    tuple_contract,
 ):
     with pytest.raises(ValidationError) as e:
         tuple_contract.functions.method(
@@ -685,18 +687,23 @@ def test_function_wrong_args_for_tuple_collapses_args_in_message(
 
     # assert the user arguments are formatted as expected:
     # (int,(int,int),((int,(bool,(bool)),(address))))
-    e.match("\\(int,\\(int,int\\),\\(\\(int,\\(bool,\\(bool\\)\\),\\(address\\)\\)\\)\\)")  # noqa: E501
+    e.match(
+        "\\(int,\\(int,int\\),\\(\\(int,\\(bool,\\(bool\\)\\),\\(address\\)\\)\\)\\)"
+    )  # noqa: E501
 
     # assert the found method signature is formatted as expected:
     # ['method((uint256,uint256[],(int256,bool[2],address[])[]))']
-    e.match("\\['method\\(\\(uint256,uint256\\[\\],\\(int256,bool\\[2\\],address\\[\\]\\)\\[\\]\\)\\)'\\]")  # noqa: E501
+    e.match(
+        "\\['method\\(\\(uint256,uint256\\[\\],\\(int256,bool\\[2\\],address\\[\\]\\)\\[\\]\\)\\)'\\]"
+    )  # noqa: E501
 
 
 @pytest.mark.parametrize(
-    "address", (
+    "address",
+    (
         "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",  # checksummed
-        b'\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee',  # noqa: E501
-    )
+        b"\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee\xee",  # noqa: E501
+    ),
 )
 def test_function_wrong_args_for_tuple_collapses_kwargs_in_message(
     address, tuple_contract
@@ -708,11 +715,15 @@ def test_function_wrong_args_for_tuple_collapses_kwargs_in_message(
 
     # assert the user keyword arguments are formatted as expected:
     # {'a': '(int,(int,int),((int,(bool,(bool)),(address))))'}
-    e.match("{'a': '\\(int,\\(int,int\\),\\(\\(int,\\(bool,\\(bool\\)\\),\\(address\\)\\)\\)\\)'}")  # noqa: E501
+    e.match(
+        "{'a': '\\(int,\\(int,int\\),\\(\\(int,\\(bool,\\(bool\\)\\),\\(address\\)\\)\\)\\)'}"
+    )  # noqa: E501
 
     # assert the found method signature is formatted as expected:
     # ['method((uint256,uint256[],(int256,bool[2],address[])[]))']
-    e.match("\\['method\\(\\(uint256,uint256\\[\\],\\(int256,bool\\[2\\],address\\[\\]\\)\\[\\]\\)\\)'\\]")  # noqa: E501
+    e.match(
+        "\\['method\\(\\(uint256,uint256\\[\\],\\(int256,bool\\[2\\],address\\[\\]\\)\\[\\]\\)\\)'\\]"
+    )  # noqa: E501
 
 
 def test_function_no_abi(w3):