Optimism - Notice history

We are performing scheduled maintenance on the OP Mainnet sequencer infrastructure to transition sequencer leadership to a new set of sequencers. As part of this transition, OP Mainnet will move from 250ms flashblock production to 200ms subblock production.
No service disruption is expected: block production should continue uninterrupted throughout the transition. This maintenance window is precautionary, and we will confirm once the transition is complete.

We are executing maintenance on the flashblocks endpoints for OP Sepolia & OP Mainnet. When executing the cutover, clients may experience connection issues while DNS propagates. We anticipate this cutover being brief and any connection issues should be resolved within 5 minutes of the cutover.