Tuesday, November 30, 2021
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Altair Mainnet Announcement | Ethereum Basis Weblog

The Altair beacon chain improve is able to be activated on the Ethereum mainnet. The improve will go stay at epoch 74240 (Oct 27, 2021, 10:56:23am UTC).

Consumer Variations

As a way to be suitable with the Altair improve, beacon node operators should replace the shopper model that they run. In the event you run a validator, you should improve to proceed to observe the mainnet beacon chain. Failure to take action will lead to downtime penalties.

The variations listed under are help the mainnet Altair improve.

EDIT: The next desk has been edited to reference the newest Altair shopper releases previous to the mainnet improve. These comprise safety patches and optimizations so we suggest *all customers improve to the newest variations.*

* Consumer releases referenced with an asterisk have been modified because the authentic announcement.

Improve for Validators

Though this improve has been extensively examined if you’re a validator on Mainnet, we strongly suggest being on-line throughout the time of the improve within the occasion that any unforseen points emerge.

Bug Bounty Bonus

As a way to get extra eyes on the Altair improve, all bounties for vulnerabilities associated to the Altair improve have been doubled between now and 4 weeks after the launch (Nov 27). Essential Altair bugs in each purchasers and specs at the moment are value as much as $100k.

See the bug bounty program for extra particulars.


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

This improve is only for the beacon chain consensus mechanism and does not have an effect on end-user accounts, contracts, and state secured by the proof-of-work chain.

In the event you run your personal beacon node, it is advisable to improve your node. See the “As a non-validator beacon node operator, what do I have to do?”” part under.

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

Obtain the newest model of your beacon node shopper, as listed within the desk above.

As a validator, what do I have to do?

Obtain the newest model of the software program you run, as listed within the desk above. Comply with any directions within the launch and restart your node along with your customary restart process.

Be aware, node software program that helps impartial validator purchasers would require an improve and restart to this element as effectively. Please learn warnings and directions contained within the official releases.

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

If you’re utilizing a beacon node shopper that isn’t up to date to the newest model (listed above), your shopper will sync to the pre-fork beacon chain as soon as the improve happens. You can be caught on an incompatible chain following the previous guidelines.

In the event you run a validator, the validator will probably be unable to take part within the upgraded consensus and can proceed to function on the post-upgrade beacon chain community. It will lead to penalties with respect to the upgraded Mainnet chain.

What occurs throughout a beacon chain community improve?

After the Ethereum neighborhood involves an settlement regarding which modifications ought to be included within the improve, modifications to the protocol are written into the assorted purchasers. The beacon chain protocol modifications are activated at a particular epoch quantity. Any nodes that haven’t been upgraded to the brand new ruleset will probably be deserted on the previous chain the place the earlier guidelines could live on.

Why “Altair”?

After neighborhood dialogue and emoji voting, shopper groups determined to make use of star names for every improve the place the sequence of improve names are in alphabetical order.

Altair begins with a “A”, is the twelfth brightest star within the evening sky, rotates fairly quickly with an equatorial velocity of 286 km/s, and is the situation of the Forbidden Planet. Fairly cool star for those who ask us.


Large shoutout to all the researchers, engineers, and neighborhood members which have put an unimaginable quantity of labor into this primary beacon chain community improve.

Now, onward to the Merge 🚀


That is an emergent and evolving extremely technical house. In the event you select to implement the suggestions on this submit and proceed to take part, you need to ensure you perceive the way it impacts you. It is best to perceive that there are dangers concerned together with however not restricted to dangers like surprising bugs. By selecting to implement these suggestions, you alone assume the dangers of the implications. This submit and suggestions will not be a sale of any form, and don’t create any warranties of any form together with however not restricted to something associated to the Ethereum community, or the Ethereum purchasers referred to herein.



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