[xenoliss]

What changed? Why?

Adds the Zeronet task that sets the post-Denim gas parameters on SystemConfig, signed by the Base multisig (the SystemConfig owner):

• gas limit 1,200,000,000 → 120,000,000;
• EIP-1559 denominator 100 → 1000.

At the first Denim block the node applies these values itself (DENIM_GAS_PARAMETER_SCALING_FACTOR in base/base crates/consensus/derive/src/attributes/stateful.rs). This writes them to L1 so a later SystemConfig update does not restore the 2s-block values.

Executed on October 14, 2026 after Denim activated: 0x2bf7928e… (L1 block 3816476).

Notes to reviewers

• The validation file can be generated and signed before Denim activates. The transaction must be executed after activation, in an L1 block with a timestamp strictly after the activation: if it is included in or before the L1 block the first Denim block derives from, the node scales the new values a second time. The script does not enforce this; the facilitator waits for activation before running make execute.

How has it been tested?

• sign and run simulated against Zeronet L1 before execution: pre-checks (owner, current values, ratios, min/max gas limit) and post-checks (new values, unchanged elasticity and DA footprint gas scalar) pass.
• After execution, SystemConfig reads gas limit 120000000, denominator 1000, elasticity 15, DA footprint gas scalar 119.

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 2/2	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 2 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 2 2 1 if commit is unverified 0 Sum 2

Approved review 5522596320 from roger-bai-coinbase is now dismissed due to new commit. Re-request for approval.

[jackchuma]

Automated review

Reviewed 943d7b3 against main. 2 finding(s) posted inline.

The Zeronet task itself looks correct: it executed at 2026-10-14 18:38:12 UTC, after the 18:00 UTC activation, and the validation file, records, and README agree. Both findings matter only for the later networks that reuse this task directory.

Residual risk: for future networks, the newGasLimit * 10 == oldGasLimit check (UpdateDenimGasParams.s.sol:59) only works if that network's live gas limit is divisible by 10. It fails loudly rather than doing anything unsafe.

🤖 Reply generated with Toshi

Approved review 5523622518 from leopoldjoy is now dismissed due to new commit. Re-request for approval.

[0xth4nh]

P2: the task has no status.json, so Validate task status fails as soon as this branch is merged with main.

Issue: #821 (merged today) added scripts/task-status.py check as a required workflow (validate-task-status.yml). It needs a task-root status.json for every task under active/. This branch is based on a5bc211a, before #821, so its CI is green only because the check did not exist yet. I merged the head with current main (13b02c7be, conflict-free) and ran python3 -B scripts/task-status.py check:

active/evm/tasks/2026-10-08-denim-system-config/status.json: missing status.json

The same check passes once the file exists, and the 17 scripts.tests.test_task_status tests pass either way. The task content itself is fine: I recomputed the selectors, the calldata, the packed SystemConfig slots and the validation hashes, and they match what was executed in tx 0x2bf7928e…0a5b.

Fix: add active/evm/tasks/2026-10-08-denim-system-config/status.json, modelled on 2026-10-07-denim-upgrade/status.json:

{
  "schema_version": 1,
  "task": "2026-10-08-denim-system-config",
  "kind": "active",
  "last_updated": "<UTC timestamp>",
  "networks": {
    "zeronet": {
      "step": "executed",
      "pr": "https://github.com/base/contract-deployments/pull/808",
      "blocksec_ticket": null,
      "signatures": {},
      "executed_tx": "0x2bf7928e72e17a4657a3fd24e33907574881b63878ac04d0cfeaa5e7af880a5b"
    }
  }
}

Merge or rebase onto main first and re-run python3 -B scripts/task-status.py check locally to confirm the exact shape.

Approved review 5531798577 from jackchuma is now dismissed due to new commit. Re-request for approval.

[0xth4nh]

Looks Good to Thanh's Toshi