fix(sequencer): do not run fallback actions within build window - #24504
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Sequencer defines a set of fallback actions (voting and pruning) which are meant to be executed if it fails to propose a checkpoint, due to sync errors. However, those actions were being triggered as soon as the sequencer sync check failed, even if in the next sequencer iteration the check succeeded and the sequencer managed to produce a block. Now, the sequencer waits until it's past its build deadline (too late within the build slot to actually build anything), and only then triggers the fallback actions. This gives the sequencer more changes to bundle the fallback actions together into a single multicall.
PhilWindle
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Jul 5, 2026
This was referenced Jul 5, 2026
rangozd
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Aug 5, 2026
Clean forward-port of AztecProtocol#24524 (merge-train spartan-v5, merge commit f397aa5, parents aba2a2e..7e7d8d0) onto cb/private-port-next-7. Cherry-pick -m 1 applied with zero conflicts; resulting tree touches exactly the 152 files of the source merge diff. Pure TS/docs/CI (117 e2e-consolidation test files + sequencer-client, archiver, stdlib TS, p2p, ethereum, validator-client, foundation, docs, .test_patterns.yml). No noir/circuit/pinned-artifact surfaces → no standard-contracts regen. Bundles sub-PRs AztecProtocol#24504 AztecProtocol#24506 AztecProtocol#24507 AztecProtocol#24509 AztecProtocol#24513 AztecProtocol#24515 AztecProtocol#24474 AztecProtocol#24489 AztecProtocol#24490 AztecProtocol#24491 AztecProtocol#24492 AztecProtocol#24494 AztecProtocol#24495 AztecProtocol#24498 AztecProtocol#24500 AztecProtocol#24503 AztecProtocol#24475. Tracker: AztecProtocol/aztec-packages-private#570
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Sequencer defines a set of fallback actions (voting and pruning) which are meant to be executed if it fails to propose a checkpoint, due to sync errors.
However, those actions were being triggered as soon as the sequencer sync check failed, even if in the next sequencer iteration the check succeeded and the sequencer managed to produce a block.
Now, the sequencer waits until it's past its build deadline (too late within the build slot to actually build anything), and only then triggers the fallback actions.
Fixes A-1362
Supersedes #24488