Critical Upgrade for Unichain-Sepolia Nodes
Posted: March 15, 2025 | Effective: March 20, 2025
OP Labs identified a bug affecting OP Stack Sepolia chains (not mainnet), causing temporary L1 fee overcharging.
This issue was fixed in the latest op-node release.
Action Required by March 20!
Please upgrade to:
op-node version v1.12.0op-geth version v1.101503.0
If you use the network flag --network=unichain-sepolia, the upgrade activates automatically.
Otherwise, add this to your rollup.json: "pectra_blob_schedule_time": 1742486400
All node and chain operators must update before the Ethereum Pectra activation.
Full release notes and instructions: OP release notes and OP Labs announcement.