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@hanabi1224 hanabi1224 commented Nov 19, 2025

Summary of changes

Changes introduced in this pull request:

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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.

Summary by CodeRabbit

  • Refactor
    • Internal code optimizations to improve performance and maintainability of event filtering mechanisms.

@hanabi1224 hanabi1224 marked this pull request as ready for review November 19, 2025 10:22
@hanabi1224 hanabi1224 requested a review from a team as a code owner November 19, 2025 10:22
@hanabi1224 hanabi1224 requested review from LesnyRumcajs and removed request for a team November 19, 2025 10:22
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coderabbitai bot commented Nov 19, 2025

Walkthrough

Optimizes Tipset handling in the eth filter module by making SkipEvent implement Copy, replacing manual Arc construction with chain_arc(), and eliminating per-iteration Tipset cloning while preserving existing behavior.

Changes

Cohort / File(s) Summary
SkipEvent trait and Tipset optimization
src/rpc/methods/eth/filter/mod.rs
Added Copy trait to SkipEvent enum; replaced manual Arc handling in tipset iteration with chain_arc(&ctx.store()); removed per-iteration cloning by passing Arc directly to collect_events

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

  • Verify that chain_arc() correctly replaces the manual Arc construction pattern
  • Confirm Copy trait addition to SkipEvent doesn't introduce unintended side effects
  • Validate that removing per-iteration tipset cloning maintains correct ownership semantics

Possibly related PRs

Suggested reviewers

  • akaladarshi
  • LesnyRumcajs
  • elmattic

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)
Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. You can run @coderabbitai generate docstrings to improve docstring coverage.
✅ Passed checks (2 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title accurately describes the main purpose of the changes: avoiding unnecessary clones in Eth RPC methods. The PR reduces cloning operations by making SkipEvent implement Copy and simplifying Arc handling.
✨ Finishing touches
  • 📝 Generate docstrings
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Post copyable unit tests in a comment
  • Commit unit tests in branch hm/avoid-clones

📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ad8485c and 250c1c3.

📒 Files selected for processing (1)
  • src/rpc/methods/eth/filter/mod.rs (2 hunks)
🧰 Additional context used
🧠 Learnings (2)
📓 Common learnings
Learnt from: hanabi1224
Repo: ChainSafe/forest PR: 5930
File: build.rs:64-77
Timestamp: 2025-08-13T09:43:20.301Z
Learning: hanabi1224 prefers hard compile-time errors in build scripts rather than runtime safeguards or collision detection, believing it's better to fail fast and fix root causes of issues like malformed snapshot names.
Learnt from: hanabi1224
Repo: ChainSafe/forest PR: 6057
File: src/cli/subcommands/f3_cmd.rs:0-0
Timestamp: 2025-09-09T10:37:17.947Z
Learning: hanabi1224 prefers having default timeouts (like 10m for --no-progress-timeout) to prevent commands from hanging indefinitely, even when the timeout flag isn't explicitly provided by users. This fail-fast approach is preferred over requiring explicit flag usage.
📚 Learning: 2025-08-08T12:11:55.266Z
Learnt from: hanabi1224
Repo: ChainSafe/forest PR: 5867
File: src/ipld/util.rs:461-487
Timestamp: 2025-08-08T12:11:55.266Z
Learning: Forest (src/ipld/util.rs, Rust): In UnorderedChainStream::poll_next, dropping `extract_sender` (when no more tipsets and the extract queue is empty) is the intended shutdown signal for workers. Any subsequent attempt to enqueue work after this drop is a logic error and should be treated as an error; do not change `send()` to ignore a missing sender.

Applied to files:

  • src/rpc/methods/eth/filter/mod.rs
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (7)
  • GitHub Check: Build forest binaries on Linux AMD64
  • GitHub Check: tests-release
  • GitHub Check: tests
  • GitHub Check: cargo-publish-dry-run
  • GitHub Check: Build Ubuntu
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🔇 Additional comments (2)
src/rpc/methods/eth/filter/mod.rs (2)

98-102: LGTM: Adding Copy trait to SkipEvent.

Adding Copy to this simple enum is appropriate since it contains only unit variants with no data. This allows the compiler to optimize value passing throughout the codebase.


436-442: The verification confirms that chain_arc method exists and is correctly implemented. The method returns impl Iterator<Item = Arc<Tipset>> + '_, which means each iteration yields an Arc<Tipset> directly. The usage in lines 436-442 is correct: the loop variable receives Arc<Tipset> values, and passing &tipset to collect_events provides the expected &Arc<Tipset> reference type.

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@LesnyRumcajs LesnyRumcajs added this pull request to the merge queue Nov 19, 2025
Merged via the queue into main with commit b197e21 Nov 19, 2025
46 checks passed
@LesnyRumcajs LesnyRumcajs deleted the hm/avoid-clones branch November 19, 2025 13:21
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3 participants