Upgrade 17: Jovian - Overview

This upgrade introduces several key improvements to enhance network performance and security.

Scope

• Configurable Minimum Basefee: Allows chain operators to specify a minimum base fee to shorten the length of prioritt fee auctions.
  • Spec: https://github.com/ethereum-optimism/specs/pull/747
  • Design doc: https://github.com/ethereum-optimism/design-docs/blob/main/protocol/minimum-base-fee.md
• Calldata footprint limit: adds an in-protocol limit to calldata to prevent DA spam and prevent priority fee auctions.
  • Spec: https://github.com/ethereum-optimism/specs/pull/748
  • Design doc: https://github.com/ethereum-optimism/design-docs/pull/317
• Operator Fee Fix
  • Spec https://github.com/ethereum-optimism/specs/pull/764
  • Design Doc https://github.com/ethereum-optimism/design-docs/blob/main/protocol/operator-fee-scalar-fix.md
• Cannon Go 1.24 support
  • Upgrading the on-chain fault proof virtual machine implementation to support Go 1.24

Timeline

<aside> ⚠️

Timelines are subject to change. Official release dates will be posted by our developer support team.

</aside>

We currently expect Upgrade 17 to ship to Mainnet in mid November.

• Release candidates for devnets: w/c 20th October
• Release for Sepolia superchain w/c 27th October
• Activation on Sepolia superchain + Release candidates for mainnet w/c 3rd November
• Activation on mainnet superchain w/c 10th November

Affected Users

• This upgrade is a hardfork. Chain operators should prepare for this upgrade by reviewing the technical documentation.

Resources

For technical questions or support during this upgrade, please contact our developer support team.