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Joint House Optimistic Proposal by The Optimism Foundation

Upgrade 19 - Stake-Based Priority Ordering Experiment

New: This proposal implements the Joint House Voting. Learn more about how the two houses work together here: Operating Manual.

You should only cast a vote on this proposal if you want to veto the DAB’s decision to approve this upgrade.

U19 introduced the following capabilities to the OP Stack:

  • Staking-based priority access to transaction ordering: Introduces a smart contract where users stake OP to receives priority treatment in block ordering.
  • Two-phase ordering mechanism: Deploys FIFO ordering among staked participants, followed by a stake-weighted ordering model with diminishing returns based on stake size and age.

This proposal was approved by the Developer Advisory Board here. Governance participants may veto the DAB’s decision if they believe it disadvantages their stakeholder group (tokenholders, chains, apps, or end-users.) You can read more about Stakeholder Vetos in our Operating Manual.

In the case of a veto, this proposal will proceed through the Appeals process outlined in the Operating Manual.

ACTIVE

Ends 1:05 am May 12, 2026

Proposal will pass

One of three thresholds are applied, based on the number of groups signaling to veto.

Chains0%
Apps0%
Users0.6%
Delegates0.0%

# of signaling groups

Are you a citizen? Vote here