Maintenance Upgrade Proposal: Soneium Mainnet Proposer Rotation and Fee Vault Config Update is a maintenance upgrade that supports the migration of Soneium Mainnet's sequencer operations from Sony to the Optimism Foundation as chain servicer via OP Enterprise, with cutover targeted for November 19, 2026. The proposal introduces two administrative changes: replacing the proposer authorized on Soneium's permissioned dispute game with the new OP Enterprise proposer, and redirecting Soneium's L1 fee vault and operator fee vault, which cover the chain's L1 costs, to the OP Enterprise L1 cost recipient instead of Sony's fee recipient, with withdrawals moving to L1 and a 0.15 ETH minimum withdrawal on both vaults.

This is an optimistic approval. You should only cast a vote if you want to veto this maintenance upgrade. You can read more about this proposal type in our operating manual. You can read the proposal in its entirety here.