✨🔴 Optimistic Fjord Mainnet Release

❗ Mainnet operators are required to update to this release to follow the chain post-Fjord. This release contains an optimistic Fjord Mainnet activation time of Wed Jul 10 16:00:01 UTC 2024.

It is a recommended release for all node operators, as it contains various improvements and updates to the libp2p dependencies.

The corresponding op-geth release is v1.101315.2.

Optimism Governance Voting Cycle 23b

The Fjord activation contained in this release is still subject to approval during the currently ongoing Optimism Governance voting cycle 23b, see the Governance Proposal of the Fjord Protocol Upgrade. The reflection voting period ends on Jun 19 while the veto period ends on Jun 26, 19:00 UTC.

In the unlikely event that the veto period ends in a veto, we will publish a Veto Release. The fjord activation can also be disabled by setting the override.fjord configuration flag to a date in the far future, e.g. --override.fjord 2281580442. Always confirm in startup logs that overrides have been applied correctly.

Important Changes

The missing Fjord override flag got added ethereum-optimism#10648
op-node now supports specifying multiple L1 beacon endpoint fallbacks ethereum-optimism#10655
- The flag l1.beacon-archiver got renamed to l1.beacon-fallbacks, but the old flag is retained for backwards compatibility, as are the old env vars.
Multiple refactors of the derivation pipeline were performed ethereum-optimism#10580 ethereum-optimism#10580 ethereum-optimism#10642
The batcher's and proposer's active sequencer follow mode got improved, ensuring that each endpoint is dialed exactly once ethereum-optimism#10696 ethereum-optimism#10705

Partial Changelog

op-node,op-service: Add Fjord override flag by @sebastianst in ethereum-optimism#10648
plasma mode: Specify valid commitment type by @trianglesphere in ethereum-optimism#10622
fix AsyncGossiper hangup by @zhiqiangxu in ethereum-optimism#10654
op-node: cleanup readme by @tynes in ethereum-optimism#10679
op-node: Support multiple beacon archiver/fallbacks by @sebastianst in ethereum-optimism#10655
go: bump libp2p deps by @sebastianst in ethereum-optimism#10687
op-node/p2p: add descriptive error code string by @sebastianst in ethereum-optimism#10662
op-batcher: Do not retry dial attempts in active l2 providers by @BrianBland in ethereum-optimism#10696
op-node: encapsulate finality and simplify EngineQueue by @protolambda in ethereum-optimism#10580
op-node: extract unsafe-block processing from derivation code-path by @protolambda in ethereum-optimism#10599
op-node: Separate attributes processing from EngineQueue by @protolambda in ethereum-optimism#10642
op-batcher/op-proposer: Only pass lifecycle contexts into RollupProvider.RollupClient by @BrianBland in ethereum-optimism#10705
Add optimistic Fjord mainnet activation by @sebastianst in ethereum-optimism#10735