Instability on Optimism Goerli

We have publicly shared the immediate fix to solve the issue for node operators on Optimism Goerli. Major services and infrastructure that operate Optimism Goerli nodes are slowly starting to resume operations as they add the specified flag.

We will post an update when we have published a fixed op-node release and node operators can remove the temporary flag.

The sequencer is confirmed to be up and processing transactions, deposits, and withdrawals safely. All nodes serving the public RPC endpoint have been updated with the below flag.

Our team has identified the cause of the Optimism Goerli node halts.

With the L1 Goerli network upgrading to Shapella, a change during Shanghai was made to how the block hash is derived. We have checks inside the `op-node` to recompute the block hash to ensure your L1 RPC is being honest - these started failing with the Shanghai updates.
This will prevent any nodes being operated on Optimism Goerli from continuing to produce new blocks. The sequencer is confirmed to be up and processing transactions, deposits, and withdrawals safely.

***If you operate nodes on Optimism Goerli:***

To immediately fix this issue, please add a flag:
`--l1.trustrpc=true`
or
`OP_NODE_L1_TRUST_RPC="true"`
to disable these block hash checks.

We will be pushing a new release of the `op-node` in the coming days with a fix. After upgrading to that new release you will be able to remove the above flag.

We are investigating report of instability on Optimism Goerli.