feat(sequencer): redistribute checkpoint budget evenly across remaining blocks#21378
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PhilWindle merged 1 commit intomerge-train/spartanfrom Mar 12, 2026
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…ng blocks Instead of allowing a single block to consume the entire remaining checkpoint budget, redistribute it evenly across remaining blocks scaled by a multiplier. This produces smoother distribution (e.g., with multiplier=1.2 and 5 blocks: 240k/216k/180k/... instead of all-or-nothing). Also changes the default perBlockAllocationMultiplier from 2 to 1.2. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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…ng blocks (#21378) Update the per-block budgets so that, on every block, the limits are further adjusted to `remainingCheckpointBudget / remainingBlocks * multiplier`. This prevents the last blocks from starvation. Also adjusts the multiplier from 2x to 1.2x. ## Visualization Using the https://github.com/AztecProtocol/explorations/tree/main/block-distribution-simulator ### Before this PR No redistribution, 2x multiplier <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-38" src="https://github.com/user-attachments/assets/fda36d04-5d9e-456a-9ced-4649fa58d724" /> ### After this PR Redistribution enabled, 1.2x multiplier <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-49" src="https://github.com/user-attachments/assets/2bc196f3-77fa-47bf-9294-4eb4199f8f93" /> ### With no multiplier For comparison purposes only, note the lower gas utilization <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-59" src="https://github.com/user-attachments/assets/0facbc36-65e3-446e-abaf-eb7f637b87c9" /> ## Summary - Adds `SEQ_REDISTRIBUTE_CHECKPOINT_BUDGET` (default: true) to distribute remaining checkpoint budget evenly across remaining blocks instead of letting one block consume it all. Fair share per block is `ceil(remainingBudget / remainingBlocks * multiplier)`, applied to all four dimensions (L2 gas, DA gas, blob fields, tx count). - Changes default `perBlockAllocationMultiplier` from 2 to 1.2 for smoother distribution. - Wires `maxBlocksPerCheckpoint` from the timetable through to the checkpoint builder config. ## Test plan - Existing `capLimitsByCheckpointBudgets` tests pass with `redistributeCheckpointBudget: false` (old behavior) - New tests cover: even split with multiplier=1, fair share with multiplier=1.2, last block gets all remaining, disabled flag falls back to old behavior, DA gas and tx count redistribution - `computeBlockLimits` tests updated for new default multiplier and `maxBlocksPerCheckpoint` return value 🤖 Generated with [Claude Code](https://claude.com/claude-code)
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✅ Successfully backported to backport-to-v4-next-staging #21370. |
ludamad
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…ng blocks (#21378) Update the per-block budgets so that, on every block, the limits are further adjusted to `remainingCheckpointBudget / remainingBlocks * multiplier`. This prevents the last blocks from starvation. Also adjusts the multiplier from 2x to 1.2x. ## Visualization Using the https://github.com/AztecProtocol/explorations/tree/main/block-distribution-simulator ### Before this PR No redistribution, 2x multiplier <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-38" src="https://github.com/user-attachments/assets/fda36d04-5d9e-456a-9ced-4649fa58d724" /> ### After this PR Redistribution enabled, 1.2x multiplier <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-49" src="https://github.com/user-attachments/assets/2bc196f3-77fa-47bf-9294-4eb4199f8f93" /> ### With no multiplier For comparison purposes only, note the lower gas utilization <img width="1544" height="737" alt="Screenshot From 2026-03-11 15-50-59" src="https://github.com/user-attachments/assets/0facbc36-65e3-446e-abaf-eb7f637b87c9" /> ## Summary - Adds `SEQ_REDISTRIBUTE_CHECKPOINT_BUDGET` (default: true) to distribute remaining checkpoint budget evenly across remaining blocks instead of letting one block consume it all. Fair share per block is `ceil(remainingBudget / remainingBlocks * multiplier)`, applied to all four dimensions (L2 gas, DA gas, blob fields, tx count). - Changes default `perBlockAllocationMultiplier` from 2 to 1.2 for smoother distribution. - Wires `maxBlocksPerCheckpoint` from the timetable through to the checkpoint builder config. ## Test plan - Existing `capLimitsByCheckpointBudgets` tests pass with `redistributeCheckpointBudget: false` (old behavior) - New tests cover: even split with multiplier=1, fair share with multiplier=1.2, last block gets all remaining, disabled flag falls back to old behavior, DA gas and tx count redistribution - `computeBlockLimits` tests updated for new default multiplier and `maxBlocksPerCheckpoint` return value 🤖 Generated with [Claude Code](https://claude.com/claude-code)
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BEGIN_COMMIT_OVERRIDE feat: add ETHEREUM_HTTP_TIMEOUT_MS env var for viem HTTP transport (#20919) fix(archiver): filter tagged log queries by block number (#21388) fix(node): handle slot zero in getL2ToL1Messages (#21386) feat(sequencer): redistribute checkpoint budget evenly across remaining blocks (#21378) fix: fall back to package.json for CLI version detection (#21382) chore: Removed multiplier config (#21412) chore: Removed default snapshot url config (#21413) chore: Read tx filestores from network config (#21416) fix(node): check world state against requested block hash (#21385) feat(p2p): use l2 priority fee only for tx priority (#21420) feat(p2p): reject and evict txs with insufficient max fee per gas (#21281) revert "feat(p2p): reject and evict txs with insufficient max fee per gas (#21281)" (#21432) chore: Reduce log spam (#21436) fix(tx): reject txs with invalid setup when unprotecting (#21224) fix: orchestrator enqueue yield (#21286) chore(builder): check archive tree next leaf index during block building (#21457) fix: scenario deployment (#21428) chore: add claude skill to read network-logs (#21495) chore: update claude network-logs skill (#21523) feat(rpc): add package version to RPC response headers (#21526) chore(prover): silence "epoch to prove" debug logs (#21527) chore(sequencer): do not log blob data (#21530) fix: dependabot alerts (#21531) docs(p2p): nicer READMEs (#21456) fix(archiver): guard getL1ToL2Messages against incomplete message sync (#21494) fix(sequencer): await syncing proposed block to archiver (#21554) feat(ethereum): check VK tree root and protocol contracts hash in rollup compatibility (#21537) fix: marking peer as dumb on failed responses (#21316) fix(kv-store): make LMDB clear and drop operations atomic across sub-databases (#21539) feat(world-state): add blockHash verification to syncImmediate (#21556) chore(monitor): print out l2 fees components (#21559) chore: rm faucet (#21538) chore: remove old merkle trees (#21577) feat: Implement commit all and revert all for world state checkpoints (#21532) chore: skip flaky browser acir tests in CI (#21596) fix: Better detection for epoch prune (#21478) chore: logging (#21604) fix: Don't update state if we failed to execute sufficient transactions (#21443) END_COMMIT_OVERRIDE
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Update the per-block budgets so that, on every block, the limits are further adjusted to
remainingCheckpointBudget / remainingBlocks * multiplier. This prevents the last blocks from starvation. Also adjusts the multiplier from 2x to 1.2x.Visualization
Using the https://github.com/AztecProtocol/explorations/tree/main/block-distribution-simulator
Before this PR
No redistribution, 2x multiplier
After this PR
Redistribution enabled, 1.2x multiplier
With no multiplier
For comparison purposes only, note the lower gas utilization
Summary
SEQ_REDISTRIBUTE_CHECKPOINT_BUDGET(default: true) to distribute remaining checkpoint budget evenly across remaining blocks instead of letting one block consume it all. Fair share per block isceil(remainingBudget / remainingBlocks * multiplier), applied to all four dimensions (L2 gas, DA gas, blob fields, tx count).perBlockAllocationMultiplierfrom 2 to 1.2 for smoother distribution.maxBlocksPerCheckpointfrom the timetable through to the checkpoint builder config.Test plan
capLimitsByCheckpointBudgetstests pass withredistributeCheckpointBudget: false(old behavior)computeBlockLimitstests updated for new default multiplier andmaxBlocksPerCheckpointreturn value🤖 Generated with Claude Code