Executive Summary

The Jovian hardfork is a proposed OP Stack network upgrade that enhances fee calculation mechanisms and updates the fault proof virtual machine. It upgrades Cannon to support Go 1.24, ensuring compatibility with the latest go-ethereum updates and maintaining security for both transactions and fault proofs. It also introduces new mechanisms—the Minimum Base Fee and Data Availability Footprint Block Limit—to make L2 fees respond more accurately to demand, reducing throttling and restoring normal market conditions faster during congestion. Additionally, the Operator Fee Fix enables more realistic operator fee settings, ensuring fair compensation and laying groundwork for future features like Custom Gas Tokens.

The Fusaka hardfork, an upcoming Ethereum (L1) protocol upgrade, introduces significant changes to consensus and execution layers that directly affect OP Stack chains. Without adaptation, OP Stack chains would halt or experience severe fee distortions. To ensure compatibility, Fusaka Readiness involves updates to node software, protocol specifications, and fault proof contracts, allowing chains to continue operating seamlessly when Fusaka activates on testnets and mainnet. This is a critical maintenance release for all OP Stack operators and users, though the Osaka execution-layer component will not yet be activated on L2.

If this vote passes, it will proceed directly into a one-week veto period, subject to a governance vote. If the vote fails, it will enter an appeals process, as outlined in the Operating Manual.