From 6c36832f0e2b727cfbdfe2949109fa5b15fbbfd1 Mon Sep 17 00:00:00 2001
From: Ryan Chow <chowryan@gmail.com>
Date: Tue, 9 Apr 2019 06:33:36 -0700
Subject: [PATCH] Stop using deprecated web3.py interface (#1759)

* Refactor contract function call to support web3.py v5.0.0. (backwards compatible with v4)
---
 .../order_utils/src/zero_ex/order_utils/__init__.py |  4 ++--
 .../order_utils/stubs/web3/utils/datatypes.pyi      | 13 +++++++++++--
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index c1fea8c21c..40f2bf0b77 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -428,9 +428,9 @@ def is_valid_signature(
     )
     try:
         return (
-            contract.call().isValidSignature(
+            contract.functions.isValidSignature(
                 data, to_checksum_address(signer_address), signature
-            ),
+            ).call(),
             "",
         )
     except web3.exceptions.BadFunctionCallOutput as exception:
diff --git a/python-packages/order_utils/stubs/web3/utils/datatypes.pyi b/python-packages/order_utils/stubs/web3/utils/datatypes.pyi
index 70baff3728..826fa5590c 100644
--- a/python-packages/order_utils/stubs/web3/utils/datatypes.pyi
+++ b/python-packages/order_utils/stubs/web3/utils/datatypes.pyi
@@ -1,3 +1,12 @@
-class Contract:
-    def call(self): ...
+from typing import Callable
+
+
+class ContractFunctions:
+    def __getattr__(self, function_name) -> Callable:
+        ...
+    ...
+
+
+class Contract:
+    functions: ContractFunctions
     ...