fix: ignore PTC votes whose slot does not match the referenced block#9425
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This pull request updates the notifyPtcMessages method in the fork-choice and proto-array modules to accept a slot parameter. This ensures that Payload Timeliness Committee (PTC) votes are only processed if their slot matches the assigned beacon block's slot, preventing out-of-slot votes from mutating the fork choice state. The corresponding API, gossip handlers, block import logic, and unit tests have been updated to support this new parameter. No review comments were provided, so there is no feedback to address.
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| if (node === undefined || node.slot !== slot) { | ||
| return; |
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When this new branch returns for data.slot != block.slot, gossip/API validation has already treated the message as valid: validatePayloadAttestationMessage() only checks that the block root is known, verifies the signature against data.slot, and then adds the validator to seenPayloadAttesters; the API/gossip handlers also insert it into the payload-attestation pool before calling here. In the skipped-slot case the local validator API can produce exactly this shape by returning the closest prior canonical block with the current slot, so the message is then silently ignored by fork choice but still consumes the validator's per-epoch dedup and can be pooled/published. Please move this slot/root check into validation before marking seen/inserting, or make this call report that the message was ignored so callers can avoid those side effects.
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- will be addressed by fix: ignore PTC attestations for empty assigned slots #9427
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Performance Report✔️ no performance regression detected Full benchmark results
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wemeetagain
approved these changes
May 30, 2026
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Motivation
adhere to spec
notify_ptc_messagessee #9415 (comment), this caused issues on
glamsterdam-devnet-4Description
Ignore PTC votes whose slot does not match the referenced block