Sepolia Post-Merge Upgrade Announcement | Ethereum Foundation Blog

Home » Sepolia Post-Merge Upgrade Announcement | Ethereum Foundation Blog


  • 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 further performance past this.
  • Sepolia node operators should improve their execution layer shopper prior to dam 1735371.
  • An identical improve is predicted on Goerli and the Ethereum mainnet as soon as these networks have transitioned to proof-of-stake

Background

With a purpose to preserve a wholesome peer listing, nodes on Ethereum’s execution layer will mechanically disconnect friends who should 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 best way to the newest improve, Gray 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 issue worth reasonably 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 might use a minority of hash energy to construct a malicious chain fork that might fulfill the block top requirement. Then the primary PoS block could also be maliciously proposed on prime 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 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 an extra improve should now be completed so as to add this. It is very important word that the one change launched as a part of this improve is specifying a block quantity that nodes can use to establish friends who’ve gone by means of The Merge. No different performance is launched or deprecated as a part of this improve.

Improve Info

Timing

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

Notice {that a} comparable improve can 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 post 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 hold operating their present consensus layer shopper launch on Sepolia by means of the transition.

Notice that shopper 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 need to use that very same model on Sepolia for this improve.

Execution Layer

Improve Specs

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

FAQ

As a node operator, what ought to I do?

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

As a staker, what do I have to do?

The validator set on Sepolia is permissioned. In case you are half of the present Sepolia validators, you should replace your execution layer shopper to one of many variations listed above on August 16, 2022 on the newest.

In case you are 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 comply with the identical steps when this improve is introduced on these networks.

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

Nothing, except you might be additionally operating a node. In that case, please improve your execution layer shopper to one of many variations listed above earlier than August 16, 2022.

As an Ethereum consumer 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 can be utilized to mainnet, there gained’t be any motion wanted.


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



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