Sepolia Publish-Merge Improve Announcement | Ethereum Basis Weblog

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

Background

To be able to keep a wholesome peer listing, nodes on Ethereum’s execution layer will mechanically disconnect friends who would not 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 top, this occurs mechanically as nodes use the block top of upcomming upgrades to filter friends.

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

Utilizing a pre-defined block quantity for the hardfork is unsafe on this context as a result of PoS fork alternative 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 top requirement. Then the primary PoS block could also be maliciously proposed on high of the PoW block from this adversarial fork, changing into the top and subverting the safety of the transition.

To guard the community from this assault situation, problem collected by the chain (complete problem) is used to set off the improve.

To attenuate modifications to the protocol throughout its most complicated improve since launch, the design for The Merge excluded EIP-2124 compatibility. This implies an extra improve should now be finished so as to add this. It is very important be aware 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 means of The Merge. No different performance is launched or deprecated as a part of this improve.

Improve Data

Timing

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

Be aware {that a} related improve shall 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-about deprecated, together with Rinkeby and Kiln. See this submit for extra particulars on their deprecation schedule.

Consumer Releases

Solely execution layer purchasers have to be up to date for this improve. Node operators can preserve working their present consensus layer consumer launch on Sepolia by means of the transition.

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

Execution Layer

Improve Specs

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

FAQ

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 have to be upgraded.

As a staker, what do I must do?

The validator set on Sepolia is permissioned. If you’re half of the present Sepolia validators, you should 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 don’t want to do something right now.

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 might be additionally working a node. If that’s the 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 must do?

No. The Ethereum mainnet is just not affected by this improve. Even when this improve shall 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.