feat: fast-track event emitters

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• fast track event emitters the way Lotus does it, so try to grab the senders Ethereum address from the already loaded state and not do the entire resolution dance.

Reference issue to close (if applicable)

Closes

Other information and links

┌─────────────────────────────────────────────────────┬─────────────────────────┬────────────────────────┬──────────────┐
│                        case                         │     base avg (p99)      │    branch avg (p99)    │   speedup    │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ eth_getLogs, 1 tipset, no filter                    │ 46–54 ms (49–69)        │ 0.23 ms (0.3–0.4)      │ ~220×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ eth_getLogs, 1 tipset, Transfer topic               │ 46–61 ms (49–86)        │ 0.22 ms (0.3)          │ ~240×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ eth_getLogs, 1 tipset, 6 addresses + Transfer       │ 46–62 ms (53–77)        │ 0.22 ms (0.3)          │ ~240×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ eth_getLogs, 11 tipsets, address + topic            │ 143–162 ms (154–272)    │ 0.75 ms (1.2–1.4)      │ ~200×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ eth_getLogs, 105 tipsets, one address               │ 1.28–1.64 s (1.8–4.7 s) │ 4.7–5.0 ms (7.5–7.8)   │ ~280×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤
│ GetActorEventsRaw, 1 tipset                         │ 45–50 ms (54–75)        │ 0.34–0.36 ms (0.5–0.6) │ ~140×        │
├─────────────────────────────────────────────────────┼─────────────────────────┼────────────────────────┼──────────────┤

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

• This pull request is based on an issue that a maintainer has accepted (see Before Opening a Pull Request).
• 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

• Bug Fixes
  • Ethereum log and receipt results now resolve event emitters using the state after tipset execution, improving address accuracy.
  • Events from emitters without a resolvable delegated address are handled consistently according to the event-filter setting.
  • Log collection accounts for reverted events and event indexing. Head-change logs and block receipts use the same collection path, keeping event handling consistent across these results.

[coderabbitai]

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📒 Files selected for processing (1)

• src/tool/subcommands/api_cmd/test_snapshot.rs

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• filecoin-project/lotus (manual)

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Walkthrough

Ethereum event collection now receives the full executed tipset and resolves emitters through its post-execution state tree. RPC log and receipt paths use synchronous collection, and daemon cache warmup no longer collects Ethereum events. API snapshot coverage accepts descriptive suffixes.

Changes

Ethereum event collection

Layer / File(s)	Summary
Executed-tipset event collection src/shim/state_tree.rs, src/rpc/methods/eth/filter/mod.rs, src/rpc/methods/eth/bloom.rs	Event collection reads executed messages and the post-execution state root from the executed tipset. Emitter lookups use delegated addresses from that state tree and are cached per collection call. Unresolved emitters are skipped with OnUnresolvedAddress and use the ID address with Never. Tests cover delegated and unresolved emitters, state-root lookup failure, revert status, and event indexing.
RPC log and receipt integration src/rpc/methods/eth.rs, src/daemon/mod.rs	Block-log and receipt paths pass the full executed tipset to synchronous event collection. Daemon cache warmup no longer collects Ethereum events.

API snapshot coverage

Layer / File(s)	Summary
Snapshot method coverage src/tool/subcommands/api_cmd/test_snapshot.rs, src/tool/subcommands/api_cmd/test_snapshots.txt	Snapshot coverage accepts method names followed by a dot-prefixed suffix. The GetActorEventsRaw manifest entry points to the address-filter snapshot.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant EthereumRPC
  participant EthEventHandler
  participant StateTree
  EthereumRPC->>EthEventHandler: Pass ExecutedTipset for log collection
  EthEventHandler->>StateTree: Look up emitter delegated address
  StateTree-->>EthEventHandler: Return delegated address or lookup result
  EthEventHandler-->>EthereumRPC: Return collected events

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Merge Risk: 🟡 Moderate · up to e6fbe

Lookup failures can cause Ethereum log and receipt results to silently omit events, potentially misleading clients and indexers. Resolve or explicitly accept this risk before merging.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly summarizes the main change: optimizing event emitter resolution by using already-loaded state.
Docstring Coverage		Docstring coverage is 82.35% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 17 functions across 5 files.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @src/rpc/methods/eth/filter/mod.rs:
- Around line 474-480: Update the emitter resolution using `resolved_id_addrs`
so state-tree and delegated-address lookup errors are logged at warn level,
logging a state-tree error only once per tipset. Distinguish lookup failures
from a successful lookup with no delegation, and fall back to the emitter’s ID
address on lookup failure to match Lotus behavior.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository UI
• Review profile: CHILL
• Plan: Essentials
• Run ID: 7916431c-059c-4377-9cc8-3d3a3f857f83

📥 Commits

Reviewing files that changed from the base of the PR and between d03a30c and 2024fe1.

📒 Files selected for processing (6)

• src/daemon/mod.rs
• src/rpc/methods/eth.rs
• src/rpc/methods/eth/bloom.rs
• src/rpc/methods/eth/filter/mod.rs
• src/shim/state_tree.rs
• src/tool/subcommands/api_cmd/test_snapshots.txt

🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

• filecoin-project/lotus (manual)

💤 Files with no reviewable changes (1)

• src/daemon/mod.rs

Included review availability: This review used your included allowance. 4 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour.

[codecov]

Codecov Report

❌ Patch coverage is 95.37037% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 67.70%. Comparing base (d03a30c) to head (e6fbe97).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/rpc/methods/eth.rs	63.63%	2 Missing and 2 partials ⚠️
src/shim/state_tree.rs	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
src/daemon/mod.rs	25.43% <ø> (+0.75%)	⬆️
src/rpc/methods/eth/bloom.rs	88.88% <100.00%> (-0.11%)	⬇️
src/rpc/methods/eth/filter/mod.rs	90.88% <100.00%> (+0.37%)	⬆️
src/tool/subcommands/api_cmd/test_snapshot.rs	85.39% <100.00%> (+0.39%)	⬆️
src/shim/state_tree.rs	66.03% <83.33%> (+0.33%)	⬆️
src/rpc/methods/eth.rs	71.94% <63.63%> (-0.01%)	⬇️

... and 12 files with indirect coverage changes

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