Preparing for Holocene Network Upgrade
Learn how to prepare for Holocene Network Upgrade.
Preparing for Holocene breaking changes
This page outlines breaking changes related to the Holocene network upgrade node operators.
The Holocene upgrade for the Unichain Sepolia will be activated at Wed Dec 18 22:00:00 UTC 2024 (1734559200).
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
SystemConfigL1 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-programversion.
For more information on the Holocene implementation details, please review Holocene specification.
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:
Update to the latest release
Configure the Holocene activation date
If you are using the --network=unichain-sepolia flag on op-node and the --op-network=unichain-sepolia flag on op-geth and running the versions specified above, the Holocene network upgrade will be automatically enabled.
If you are not using those flags, you will need to manually configure the activation. This can be done one of two ways:
- Option 1: Set the activation time in the
rollup.jsonforop-node. You will still need to set theoverride.holoceneflag inop-gethif you use this option. - Option 2: Set the activation time via overrides (CLI) in both
op-nodeandop-geth. These will need to be set onop-nodeandop-gethfor the sequencer and all other nodes.
Verify Your Configuration
Make the following checks to verify that your node is properly configured.
op-nodeandop-gethwill log their configurations at startup- Check that the Holocene time is set to
activation-timestampin the op-node startup logs - Check that the Holocene time is set to
activation-timestampin the op-geth startup logs
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