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Joint House Optimistic Proposal by The Optimism Foundation

Upgrade 17 - Jovian Hardfork and Fusaka Readiness

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.

The Jovian hardfork upgrades the OP Stack to improve fee accuracy and fault proof security. It updates Cannon for Go 1.24 compatibility, adds new fee mechanisms (Minimum Base Fee and Data Availability Footprint Block Limit) to make L2 fees respond better to demand, and fixes operator fee settings for fair compensation and future features like Custom Gas Tokens.

The Fusaka hardfork is an upcoming Ethereum upgrade that changes core consensus and execution logic. Without adaptation, OP Stack chains could halt or misprice fees. Fusaka Readiness ensures continued operation through node, protocol, and contract updates.

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.

SUCCEEDED

Ended 7:49 pm Nov 19, 2025
Proposal approved
4 Group Threshold %
11%
Group
Against
% Veto
Veto
Delegates
503.4K
0.60
-
Chains
0
0.00
-
Apps
0
0.00
-
Users
34
3.40
-
Veto criteria
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