Fix EthSyncing RPC error

[sudo-shashank]

Summary of changes

Changes introduced in this pull request:

• Use camelCase in EthSyncingResultLotusJson as a follow up to https://github.com/filecoin-project/lotus/pull/13484/changes.

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

Summary by CodeRabbit

• API Updates
  • Ethereum syncing status response fields updated to camelCase format: currentBlock, highestBlock, and startingBlock (previously lowercase variants). Applications using the eth_syncing RPC method must update field name references accordingly.

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: fd57c6aa-a73c-4b2e-b9dc-6a3d4f18e228

📥 Commits

Reviewing files that changed from the base of the PR and between 1494a35 and c31eb5d.

⛔ Files ignored due to path filters (3)

• src/rpc/snapshots/forest__rpc__tests__rpc__v0.snap is excluded by !**/*.snap
• src/rpc/snapshots/forest__rpc__tests__rpc__v1.snap is excluded by !**/*.snap
• src/rpc/snapshots/forest__rpc__tests__rpc__v2.snap is excluded by !**/*.snap

📒 Files selected for processing (4)

• docs/openrpc-specs/v0.json
• docs/openrpc-specs/v1.json
• docs/openrpc-specs/v2.json
• src/rpc/methods/eth.rs

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Walkthrough

Updated JSON property names from lowercase to camelCase in the EthSyncingResultLotusJson schema across three OpenRPC specification versions and corresponding Rust serde mappings to maintain consistency with Ethereum API naming conventions.

Changes

Cohort / File(s)	Summary
OpenRPC Specification Versions docs/openrpc-specs/v0.json, docs/openrpc-specs/v1.json, docs/openrpc-specs/v2.json	Renamed EthSyncingResultLotusJson schema properties from lowercase to camelCase: currentblock → currentBlock, highestblock → highestBlock, startingblock → startingBlock. Updated required field arrays accordingly.
Rust Serde Implementation src/rpc/methods/eth.rs	Updated serde rename attributes on EthSyncingResultLotusJson::Syncing variant fields to match new camelCase JSON property names: startingblock → startingBlock, currentblock → currentBlock, highestblock → highestBlock.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• akaladarshi
• LesnyRumcajs
• hanabi1224

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Fix EthSyncing RPC error' accurately reflects the main change—converting JSON field names to camelCase in the EthSyncingResultLotusJson schema across all OpenRPC spec versions and Rust code.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch shashank/fix-ethsyncing-rpc

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch shashank/fix-ethsyncing-rpc

Warning

Review ran into problems

🔥 Problems

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@163a441). Learn more about missing BASE report.
⚠️ Report is 4 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

Files with missing lines	Coverage Δ
src/rpc/methods/eth.rs	65.55% <ø> (ø)

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