Thursday, January 15, 2026

Dencun Mainnet Announcement | Ethereum Basis Weblog

March 12, 2024 replace: Because the preliminary publication of this submit, a number of shopper groups have made Dencun-compatible releases containing important efficiency and stability enhancements. Whereas beforehand introduced variations are nonetheless thought-about adequate for the improve, a column has been added to the Shopper Releases tables highlighting the most recent beneficial variations for all shoppers.


  • Mainnet blobs are coming .oO: Two years after its ETHDenver inception, dozens of testing calls and devnets later, protodanksharding is lastly going reside on mainnet!
  • Dencun will activate on the Ethereum mainnet at epoch 269568occurring on March 13, 2024 at 13:55 UTC. Node operators & stakers should improve their software program to releases listed on this announcement.
  • To obtain electronic mail alerts for future community improve bulletins, subscribe right here.

The Dencun community improve has efficiently activated on all testnets. It’s now set for deployment on the Ethereum mainnet and can activate on the community at epoch 269568occurring on March 13, 2024 at 13:55 UTC.

The improve, which follows final yr’s Shapella improveconsists of a number of modifications, most notably the introduction of ephemeral knowledge blobs with EIP-4844, also called “protodanksharding”, which is able to assist cut back L2 transaction charges.

If you would like to observe the improve because it occurs, please be part of the group livestream.

Improve Specification

The Dencun improve combines modifications to each Ethereum’s consensus and execution layers. The total checklist of protocol modifications could be present in EIP-7569. For reference, they’re:

Deneb

Full python specs for modifications affecting Ethereum’s consensus layer could be discovered within the deneb folder of the ethereum/consensus-specs repository.

Cancun

The EIPs linked above comprise the complete specs for modifications affecting Ethereum’s execution layer.

Moreover, a python specification for these is being carried out within the ethereum/execution-specs repository.

Lastly, Deneb requires modifications to the Engine API, used for communication between the consensus and execution layer nodes. These are specified within the cancun.md file of the ethereum/execution-apis repository.

Shopper Releases

The next shopper releases help Dencun on the Ethereum mainnet. The Minimal Model column signifies the bottom Dencun-compatible launch for a shopper whereas the Really useful Model column highlights the most recent beneficial model for it. Really useful Model releases usually comprise efficiency and stability enhancements. If upgrading from a Minimal to Really useful model, be certain to learn launch notes. Releases with important breaking modifications haven’t been listed as Really useful.

When selecting which shopper to run, validators must be particularly conscious of the dangers of operating a majority shopper on both the execution layer (EL) or consensus layer (CL). An explainer of those dangers and their penalties could be discovered right here. An estimate of present EL and CL shopper distribution and guides for switching from one shopper to a different could be discovered right here.

Consensus Layer Mainnet Releases

Observe: when operating a validator, each the Consensus Layer Beacon Node and Validator Shopper should be up to date.

Execution Layer Mainnet Releases

Notes:

  • Whereas Reth helps Dencun, the shopper is present process a full audit and will not be appropriate for all manufacturing use circumstances. See the Reth README for extra context.

FAQ

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

In brief, no. You’ll be able to be part of us on the livestream to observe all of it occur reside!

In the event you use an change, digital pockets or {hardware} pockets you do not want to do something except you might be knowledgeable to take further steps by your change or pockets supplier.

In the event you run your individual Ethereum node, see the following query.

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

To be suitable with the mainnet Dencun improve, replace your node’s execution and consensus layer shoppers to the variations listed within the desk above.

As a staker, what do I have to do?

To be suitable with the mainnet Dencun improve, replace your node’s execution and consensus layer shoppers to the variations listed within the desk above. Be certain that each your beacon node and validator shopper are up to date, in addition to any exterior dependencies, corresponding to exterior block constructing software program.

Moreover, stakers who need to run by means of the improve course of extra occasions earlier than mainnet are inspired to make use of ephemery.devwhich now helps Dencun.

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

If you’re utilizing an Ethereum shopper that isn’t up to date to the most recent model (listed above), your shopper will sync to the pre-fork blockchain as soon as the improve happens.

You’ll be caught on an incompatible chain following the outdated guidelines and will likely be unable to ship Ether or function on the post-Dencun Ethereum community.

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

Evaluate the EIPs included in Dencun to find out if and the way they have an effect on your mission — there are numerous new thrilling options being launched throughout each the execution and consensus layers! The one EIPs with backwards compatibility implications are EIP-6780, EIP-7044 and EIP-7514.

Why “Dencun”?

Upgrades to the consensus layer use star names, and people to the execution layer observe Devcon metropolis names. “Dencun” is the mix of Deneb, a first-magnitude star within the Cygnus constellation, and Cancun, the placement for Devcon 3.


Thanks to everybody who helped carry the blobs into existence, (almost) rid us of SELF DESTRUCT and usually ship another main overhaul to the Ethereum community .oO!


Authentic cowl picture by Darren Lawrencewith modifications by Tomo Saito.

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