fix(test-rpc): handle extra fields in TransactionByHashResponse after CamelModel extra="forbid"

[LouisTsai-Csie]

🗒️ Description

Fixes TransactionByHashResponse to work correctly after #1989 added extra="forbid" to CamelModel

After #1989, CamelModel now rejects extra fields. This broke TransactionByHashResponse when parsing RPC responses from execution clients because:

1. Missing transactionIndex field: Standard field returned by all clients per the Ethereum JSON-RPC spec
2. Duplicate yParity/v fields: Modern clients return both for EIP-1559+ transactions
3. Parent validator strips hash: Transaction.strip_hash_from_t8n_output removes the hash field before TransactionByHashResponse can use it

Solution

• Add transaction_index field to match the standard RPC response
• Use mode="wrap" validator to run BEFORE parent's validators, preserving hash under _preserved_hash
• Strip duplicate yParity when both v and yParity are present
• Use validation_alias=AliasChoices("hash", "_preserved_hash") as fallback for the hash field

Verified with:

# create anvil node first
anvil --accounts 1 --balance 30000000

# Run the benchmark
execute remote --rpc-endpoint=http://127.0.0.1:8545 --fork Prague -m stateful tests/benchmark/stateful/bloatnet/test_multi_opcode.py::test_bloatnet_balance_extcodecopy -s

🔗 Related Issues or PRs

N/A.

✅ Checklist

• All: Ran fast tox checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  uvx tox -e static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered adding an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.
• Tests: For PRs implementing a missed test case, update the post-mortem document to add an entry the list.
• Ported Tests: All converted JSON/YML tests from ethereum/tests or tests/static have been assigned @ported_from marker.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.33%. Comparing base (8c9e889) to head (fd88214).
⚠️ Report is 3 commits behind head on forks/amsterdam.

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #1997   +/-   ##
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  Coverage            86.33%   86.33%           
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  Files                  538      538           
  Lines                34557    34557           
  Branches              3222     3222           
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  Hits                 29835    29835           
  Misses                4148     4148           
  Partials               574      574           

Flag	Coverage Δ
unittests	86.33% <ø> (ø)

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[fselmo]

Hey @LouisTsai-Csie. As we discussed, I put up a separate fix in #2000. I think the move here is to loosen restrictions for internal models on extra fields, especially things like RPC classes (TransactionByHashResponse). I think if we ever build an RPC simulator for compat tests, this would really come in handy... but for most calls I think we just want to pass through whatever the client returns.

I put up a PR that fixes #1998 as well as #1999 (I created an issue to track this). Let me know what you think.

[fselmo]

closing in favor of #2000