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Notice for the PGA transition and the Fast Feed

The ArbitrumDAO is voting on one Constitutional proposal that combines two changes to Arbitrum One: replacing Timeboost with Priority Gas Auctions (PGA), and establishing the Fast Feed. The same proposal sunsets Timeboost on Arbitrum Nova without adopting PGA there.

The onchain vote opened on August 20, 2026 on Alt Arbitrum Gov. Both components passed separate Snapshot temperature checks before they were combined.

Action required for Timeboost users

If you hold funds in the Timeboost auction contract on Arbitrum One or Arbitrum Nova, withdraw them. You can withdraw at any time, including today.

If you submit transactions to the express lane endpoint, migrate to standard transaction submission. The endpoint is decommissioned when the change activates, and it rejects transactions after that.

No activation date is set​

The proposal grants authority to activate. It does not itself switch anything on.

Priority fee collection is controlled by a TipCollectionToggler contract, through an ArbOwner precompile call to setCollectTips. Offchain enables PGA and priority fee collection after the vote executes onchain and system testing concludes, and holds that authority for two years. The Fast Feed waits on a separate track: the Arbitrum Treasury Management (ATM) Council and OAT must select the stablecoin used for payment before the Fast Feed Payment Contract can deploy.

Neither track has a published date. The two activate independently, so PGA and the Fast Feed can go live on different days.

Watch the PGA proposal thread and the Fast Feed proposal thread for the announcement.

What changes when PGA activates​

On the day PGA activates, Timeboost ends on Arbitrum One and Arbitrum Nova:

  • The autonomous auctioneer stops accepting bids.
  • The express lane endpoint is decommissioned and rejects any transaction sent to it.
  • The Sequencer stops applying the 200ms delay to transactions outside the express lane. That delay only applied while an express lane controller held the round.
  • Funds locked in the auction contract remain withdrawable.

Arbitrum One then orders transactions by the priority fee on each transaction, in 125ms rounds inside a 250ms block, with ties broken by arrival time. An anti-starvation boost raises the queue position of transactions still waiting after each round, so transactions that pay no priority fee are still included within a small number of blocks.

Arbitrum Nova returns to first-come, first-served ordering. Nova does not adopt PGA.

Actions by audience​

AudienceAction
Timeboost bidders on One or NovaWithdraw auction contract deposits and stop using the express lane endpoint
SearchersBid by setting maxPriorityFeePerGas on standard EIP-1559 type 2 transactions, as on other EVM chains
Wallets and appsNone. Transaction formats do not change
Everyday usersNone. Ordering, inclusion, and fees for transactions that pay no priority fee are unaffected
Node operatorsNone for PGA itself. Confirm your chain runs ArbOS 61 or newer, which supports priority fee collection
Arbitrum chain operatorsNone. PGA is opt-in per chain and this proposal applies only to Arbitrum One and Arbitrum Nova

Governance timeline​

Only confirmed dates appear below.

DateEvent
June 3, 2026PGA proposal posted to the Arbitrum governance forum
June 18 to 25, 2026PGA Snapshot temperature check, passed
June 19, 2026Fast Feed proposal posted to the forum
July 2026Fast Feed Snapshot temperature check, passed
July 28, 2026PGA proposal amended: activation moved behind the TipCollectionToggler
August 17, 2026Both proposals consolidated into one Constitutional AIP and one payload
August 20, 2026Consolidated onchain vote opened on Alt Arbitrum Gov

Execution follows the waiting periods set out in the ArbitrumDAO Constitution. Activation follows execution, on the schedule described above.

Revenue​

Priority fees collected under PGA and subscription proceeds from the Fast Feed both split 97% to the ArbitrumDAO Treasury and 3% to the Arbitrum Developer Guild, following the split ratified for Timeboost.

The two use different mechanisms. Fast Feed proceeds route through a dedicated RewardDistributor contract and emit an onchain event for each payment. Priority fees arrive bundled with other transaction fees, so the Arbitrum DAO accounts for them periodically and distributes them through a separate vote every six months.

Trail of Bits audited the TipCollectionToggler, the Fast Feed Payment Contract, and the RewardDistributor. Reports are on the audit reports page. Contract addresses are published in the Arbitrum One developer documentation after deployment.

Learn more​