Upgrade Proposal #3: Delta Network Upgrade

This upgrade (“Delta”) contains a single consensus-layer feature, Span Batches.

The code for the Delta upgrade is ready in the following Optimism monorepo hash: 54a7dbf8aa9b982f9c6a54cbbe448be41c0b7bc7

Test in Prod proposes 00:00:00 Feb 22, 2024, UTC for the Delta hard fork time—1707922800 in Unix Timestamp.

This proposal is eligible for Voting Cycle #17: https://gov.optimism.io/t/ready-to-vote-upgrade-proposal-3-delta-network-upgrade/7310

https://vote.optimism.io/proposals/64861580915106728278960188313654044018229192803489945934331754023009986585740