Sepolia Publish-Merge Improve Announcement | Ethereum Basis Weblog

  • The Sepolia testnet will endure a post-merge execution layer (EL) improve at block 1735371, anticipated on August 17, 2022
  • The improve will trigger EL shoppers on the community to disconnect from friends which haven’t transitioned to proof-of-stake. It doesn’t add further performance past this.
  • Sepolia node operators should improve their execution layer consumer prior to dam 1735371.
  • An analogous improve is predicted on Goerli and the Ethereum mainnet as soon as these networks have transitioned to proof-of-stake


As a way to preserve a wholesome peer record, nodes on Ethereum’s execution layer will robotically disconnect friends who shouldn’t have the identical improve sequence as them. On the Ethereum mainnet, this implies checking whether or not a peer upgrded to Frontier Thawing at block 200,000, then Homestead at block 1,150,000, and so forth all the way in which to the most recent improve, Grey Glacier, which occurred at block 15,050,000. EIP-2124 specifies how that is dealt with. In typical community upgrades, that are triggered by a block peak, this occurs robotically as nodes use the block peak of upcomming upgrades to filter friends.

For The Merge, this was not potential as a result of the improve was triggered utilizing a complete issue worth slightly than a block quantity. The rationale for this selection is defined in EIP-3675:

Utilizing a pre-defined block quantity for the hardfork is unsafe on this context because of the PoS fork selection taking precedence in the course of the transition.

An attacker could use a minority of hash energy to construct a malicious chain fork that may fulfill the block peak requirement. Then the primary PoS block could also be maliciously proposed on high of the PoW block from this adversarial fork, changing into the pinnacle and subverting the safety of the transition.

To guard the community from this assault state of affairs, issue accrued by the chain (complete issue) is used to set off the improve.

To reduce adjustments to the protocol throughout its most complicated improve since launch, the design for The Merge excluded EIP-2124 compatibility. This implies a further improve should now be performed so as to add this. It is very important notice that the one change launched as a part of this improve is specifying a block quantity that nodes can use to determine friends who’ve gone by way of The Merge. No different performance is launched or deprecated as a part of this improve.

Improve Data


This improve will occur on Sepolia at block 1735371, anticipated on August 17, 2022.

Be aware {that a} comparable improve will likely be introduced for Goerli and mainnet after these networks have transitioned to proof-of-stake.

Ropsten will not be upgraded since it’s now thought of deprecated, together with Rinkeby and Kiln. See this put up for extra particulars on their deprecation schedule.

Shopper Releases

Solely execution layer shoppers should be up to date for this improve. Node operators can maintain operating their present consensus layer consumer launch on Sepolia by way of the transition.

Be aware that consumer releases used for the Goerli/Prater merge all help this improve on Sepolia. In different phrases, for those who already downloaded a launch for the Goerli/Prater merge, you should use that very same model on Sepolia for this improve.

Execution Layer

Improve Specs

The specification for this transformation is tracked as a part of the Paris specs, beneath the FORK NEXT Improve part.


As a node operator, what ought to I do?

You need to improve your execution layer consumer to one of many variations listed above earlier than August 16, 2022. Your consensus layer consumer doesn’t should be upgraded.

As a staker, what do I have to do?

The validator set on Sepolia is permissioned. If you’re half of the present Sepolia validators, you could replace your execution layer consumer to one of many variations listed above on August 16, 2022 on the newest.

If you’re not half of the present Sepolia validator set, you do not want to do something at the moment.

Goerli/Prater and mainnet validators might want to observe the identical steps when this improve is introduced on these networks.

As an software or tooling developer, what ought to I do?

Nothing, until you’re additionally operating a node. In that case, please improve your execution layer consumer to one of many variations listed above earlier than August 16, 2022.

As an Ethereum person or Ether holder, is there something I have to do?

No. The Ethereum mainnet shouldn’t be affected by this improve. Even when this improve will likely be utilized to mainnet, there will not be any motion wanted.

Thanks to Justin Chrn for the unique cowl picture and Tomo Saito for the modifications.

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