Sepolia Shapella Announcement | Ethereum Basis Weblog


  • Withdrawals are coming! The Shapella community improve will activate on the Sepolia community at epoch 56832, scheduled for 4:04:48 AM UTC on Feb. 28, 2023
  • Stakers & node operators ought to learn this publish in addition to the Withdrawals FAQ
  • The Zhejiang testnet can be utilized to check Shapella performance previous to the Sepolia improve

After months of testing and an ephemeral devnet launch, the Shanghai/Capella (a.okay.a. Shapella) community improve is now scheduled for deployment on Sepolia.

This improve follows The Merge and permits validators to withdraw their stake from the Beacon Chain again to the execution layer. It additionally introduces new performance to each the execution and consensus layer.

Improve Specification

The Shapella improve combines modifications to the execution layer (Shanghai), consensus layer (Capella) and the Engine API.


Execution layer modifications included in Shanghai can be found right here. For reference, they’re:

Notice that EIP-6049 is simply a deprecation warning. Consumer groups anticipate SELFDESTRUCT semantics to alter in future community upgrades, however the opcode’s habits stays unchanged in Shanghai.

Moreover, the modifications can now be considered within the Ethereum Execution Layer Specification (EELS), which is a brand new Python reference implementation for the execution layer.


Modifications to the consensus layer for the Capella improve are specified within the capella listing of the v1.3.0-rc.3 specs. At a excessive degree, the improve introduces:

  • Full and partial withdrawals for validators
  • BLSToExecutionChange messages, which permit validators utilizing a BLS_WITHDRAWAL_PREFIX to replace it to an ETH1_ADDRESS_WITHDRAWAL_PREFIX, a prerequisite for withdrawals
  • Unbiased state and block historic accumulators, changing the unique singular historic roots

Stakers are inspired to learn the Withdrawal FAQ for extra info on how they need to put together for Capella.

Consumer Releases

The next consumer releases help Shanghai & Capella on the Ethereum mainnet. Notice that these releases are solely for the Sepolia improve. A subsequent announcement will likely be made for the Goerli and mainnet releases.

When selecting which consumer to run, validators needs to be particularly aware of the dangers of working a majority consumer on each the EL and CL. An explainer of those dangers and their penalties could be discovered right here. An estimate of present EL and CL consumer distribution and guides for switching from one consumer to a different could be discovered right here.

Consensus Layer Sepolia Releases

Execution Layer Sepolia Releases

Notice: go-ethereum has put out a brand new beneficial launch, v1.11.2, for the improve. v1.11.1 can also be appropriate with the Shapella Sepolia improve.


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

In brief, no.

If you happen to use an trade, digital pockets or {hardware} pockets, you do not want to do something until you’re knowledgeable to take further steps by your trade or pockets supplier.

If you happen to run your personal Ethereum node, see the “As a non-staking node operator, what do I have to do?” part under.

As a non-staking node operator, what do I have to do?

To be appropriate with the Shapella improve on the Sepolia testnet, replace your node to the model of your Ethereum consumer listed within the desk above.

As a staker, what do I have to do?

To be appropriate with the Shapella improve on the Sepolia testnet, replace your node to the model of your Ethereum consumer listed within the desk above.

We advocate studying the Withdrawal FAQ. Moreover, you’ll be able to take a look at issues on the ephemeral Zhejiang testnet previous to the improve activating on Sepolia.

What occurs if I’m a staker or node operator and I don’t take part within the improve?

In case you are utilizing an Ethereum consumer that’s not up to date to the most recent model (listed above), your consumer will sync to the pre-fork blockchain as soon as the improve happens.

You can be caught on an incompatible chain following the previous guidelines and will likely be unable to ship Ether or function on the post-Shapella Sepolia community.

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

Shapella doesn’t introduce breaking modifications for good contracts. Software and tooling builders ought to assessment the improve modifications to make sure any fixes are achieved, or to grasp the right way to use newly launched performance.

Why “Shapella”?

Upgrades to the execution layer comply with Devcon metropolis names and people to the consensus layer comply with star names. “Shapella” is the mixture of Shanghai, the situation of Devcon 2, and Capella, the brightest star within the northern constellation of Auriga.

Cowl picture by Yiran Ding


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