The Holocene upgrade for the Sepolia Superchain will be activated at Tue Nov 26 at 15:00:00 UTC (
1732633200
).The Holocene upgrade for the Unichain Sepolia will be activated at Wed Dec 18 at 22:00:00 UTC (1734559200
).The Holocene upgrade for the Soneium Minato (Sepolia) will be activated at Fri Dec 20 at 09:00:00 UTC (1734685200
).The Holocene upgrade for the Mainnet Superchain is scheduled for Thu 9 Jan 2025 18:00:01 UTC, governance approval.The Holocene upgrade for the Soneium Mainnet will be activated at Mon Feb 03 at 09:00:00 UTC (1738573200
).What’s included in Holocene
Holocene contains three changes:- Holocene block derivation: a set of changes that render the derivation pipeline stricter and simpler, improving worst-case scenarios for the Fault Proof System and Interoperability.
- EIP-1559 configurability: The elasticity and denominator EIP-1559 parameters become configurable via the
SystemConfig
L1 contract, allowing the gas target and gas limit to be configured independently. - MIPS contract upgrade: Updates to support additional calls made by the new
op-program
version.
For chain operators
Chain operators should upgrade their nodes ahead of the activation times to a release that contains the Holocene changes and has the activation times for their chains baked in, or set the activation times manually via overrides. Besides this, several L1 contract updates must be performed, the fault proof contracts should be updated before the Holocene activation. TheSystemConfig
should be upgraded after the Holocene activation. We have prepared an upgrade script to automate most of the deployments and superchain-ops task generation or Safe multi-sig input bundle generation.
Chain operators must upgrade their chain’s SystemConfig
to the latest OP Contracts v1.8.0-rc.3 release to utilize the EIP-1559 configurability. The updated SystemConfig
implementations are deployed at addresses:
- Sepolia:
0x33b83E4C305c908B2Fc181dDa36e230213058d7d
- Superchain Registry validation file - Mainnet:
0xAB9d6cB7A427c0765163A7f45BB91cAfe5f2D375
- Superchain Registry validation file
SystemConfig
after the Holocene activation. You need to upgrade if you want to reconfigure your EIP-1559 parameters.
For fault proof enabled chains
Since the Holocene upgrade changes the execution and derivation rules, the version ofop-program
used in the fault proof system has to be upgraded to a version that includes the Holocene activation date for the chain. The op-program
version used is specified via the faultGameAbsolutePrestate
setting, deployed as part of FaultDisputeGame
and PermissionedDisputeGame
contracts. Additionally, the MIPS
contract must be upgraded to support additional calls made by the new op-program
.
The FaultDisputeGame
and PermissionedDisputeGame
contracts must be deployed separately for each chain. The MIPS
contract implementation can be shared by all chains and is deployed at:
- Sepolia:
0x69470D6970Cd2A006b84B1d4d70179c892cFCE01
- Superchain Registry validation file - Mainnet:
0x5fE03a12C1236F9C22Cb6479778DDAa4bce6299C
- Superchain Registry validation file
DisputeGameFactory
to use the new FaultDisputeGame
and PermissionedDisputeGame
contracts by calling DisputeGameFactory.setImplementation
. The same upgrade script in the monorepo can be used to facilitate the upgrade, please follow the instructions in this README.
For node operators
Node operators will need to upgrade to the respective Holocene releases before the activation dates. These following steps are necessary for every node operator:1
Update to the latest release
2
Configure the Holocene activation date
If you are operating a node for an OP Chain that has opted into the hardfork activation inheritance behavior, the Holocene activation date is part of the
op-node
and op-geth
nodes. So, no action is needed for the sequencer after upgrading to the latest release. Please skip to Step 3: Verify Your Configuration.For Sepolia that is: OP Sepolia
, Base Sepolia
, Mode Sepolia
, Zora Sepolia
, and Metal Sepolia
.- Option 1: Set the activation time in the
rollup.json
forop-node
. You will still need to set theoverride.holocene
flag inop-geth
if you use this option. - Option 2: Set the activation time via overrides (CLI) in both
op-node
andop-geth
. These will need to be set onop-node
andop-geth
for the sequencer and all other nodes.
3
Verify Your Configuration
Make the following checks to verify that your node is properly configured.
op-node
andop-geth
will log their configurations at startup- Check that the Holocene time is set to
activation-timestamp
in the op-node startup logs - Check that the Holocene time is set to
activation-timestamp
in the op-geth startup logs