framework: advance sync verify_checkpoint past genesis + advanced-state vectors#672
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tcoratger merged 1 commit intoleanEthereum:mainfrom Apr 22, 2026
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…ing vectors Extends the sync fixture so verify_checkpoint can exercise states produced by walking an empty-block chain past genesis: - _make_verify_checkpoint accepts an optional anchorSlot input. Zero (default) keeps genesis behaviour; positive values call build_anchor to walk through the slot and emit the advanced state. - Output grows an anchorSlot field echoing the input so consumers see exactly which state was verified. Adds three vectors: - Advanced anchor at slot 3 with four validators (accepted) - Advanced anchor at slot 10 with four validators (accepted) - Advanced anchor at slot 5 with eight validators (accepted) Closes the round-2 audit gap SY-1 that could not be pinned while the sync fixture was locked to genesis states. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Apr 27, 2026
Absorbs 14 commits from main and resolves two textual conflicts in genesis/config.py and the matching test (PR leanEthereum#683 deleted the dead GenesisConfig.create_state helper that this branch had refactored to take a fork argument; production code goes through fork.generate_genesis directly, so the wrapper is genuinely dead). Reroutes two stale subspecs.containers imports left behind by the auto-merge: a new test file from PR leanEthereum#684 (Checkpoint __lt__) and a sync test fixture from PR leanEthereum#672. Both now resolve through forks.devnet4.containers. Tightens the docstring and inline comment introduced for update_safe_target by PR leanEthereum#680 to follow the project's documentation rules (short sentences, bullets over paragraphs). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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🗒️ Description
Extends the `sync` fixture so `verify_checkpoint` can exercise states produced by walking an empty-block chain past genesis.
Framework change
Vectors landed
Why client-relevant
Real checkpoint-sync downloads fetch advanced (non-genesis) states. The existing `verify_checkpoint` vectors only exercise fresh genesis states, so deserialization bugs that only surface when `historical_block_hashes` is non-empty were not pinned.
🔗 Related Issues or PRs
Closes round-2 audit gap SY-1.
✅ Checklist
```console
uvx tox -e all-checks
```
🤖 Generated with Claude Code