Add async changes for previous commit:

- Use json payload for CCIP-Read POST requests.
- Tweak mocker to check for ``json`` key and data in kwargs.
- Add newsfragment for PR #3512.

newsfragments/3512.bugfix.rst

@@ -0,0 +1 @@
+Send ``json``, not ``data`` with CCIP-Read POST requests.

web3/_utils/module_testing/module_testing_utils.py

@@ -196,8 +196,8 @@ async def _mock_specific_request(
         # mock response only to specified url while validating appropriate fields
         if url_from_args == mocked_request_url:
             assert kwargs["timeout"] == ClientTimeout(DEFAULT_HTTP_TIMEOUT)
-            if http_method.upper() == "post":
-                assert kwargs["data"] == {"data": calldata, "sender": sender}
+            if http_method.upper() == "POST":
+                assert kwargs["json"] == {"data": calldata, "sender": sender}
             return AsyncMockedResponse()
 
         # else, make a normal request (no mocking)

web3/utils/async_exception_handling.py

@@ -59,7 +59,7 @@ async def async_handle_offchain_lookup(
             else:
                 response = await session.post(
                     formatted_url,
-                    data={"data": formatted_data, "sender": formatted_sender},
+                    json={"data": formatted_data, "sender": formatted_sender},
                     timeout=ClientTimeout(DEFAULT_HTTP_TIMEOUT),
                 )
         except Exception:

web3/utils/exception_handling.py

@@ -52,13 +52,9 @@ def handle_offchain_lookup(
             if "{data}" in url and "{sender}" in url:
                 response = session.get(formatted_url, timeout=DEFAULT_HTTP_TIMEOUT)
             else:
-                payload = {
-                    "data": formatted_data,
-                    "sender": formatted_sender,
-                }
                 response = session.post(
                     formatted_url,
-                    json=payload,
+                    json={"data": formatted_data, "sender": formatted_sender},
                     timeout=DEFAULT_HTTP_TIMEOUT,
                 )
         except Exception: