Share this article
Altair Upgrade Set to Activate on Ethereum Mainnet This Month
The upgrade represents a “low stakes warm-up” to prepare Beacon Chain developers and client teams for the coming Merge.
Updated May 11, 2023, 3:52 p.m. Published Oct 5, 2021, 4:07 p.m. 1 min read

On Oct. 27, at epoch 74240, the Altair Beacon Chain upgrade is scheduled to activate on the Ethereum mainnet.
- According to the Ethereum blog, the upgrade represents a “low stakes warm-up” to prepare Beacon Chain developers and client teams for the coming Merge, when Ethereum will transition from a proof-of-work to proof-of-stake consensus mechanism.
- It will provide the Beacon Chain with “light client support, minor patches to incentives, per-validator inactivity leak accounting, an increase in slashing severity, and cleanups to validator rewards accounting for simplified state management.”
- Anyone operating a Beacon node or validator is required to update the client version to the new standard or risk being stuck on an incompatible chain.
- Validators who do not update won’t be able to participate in the new consensus mechanism and will also face the risk of being slashed and paying penalties.
- Because the upgrade only affects the consensus mechanism on the Beacon Chain, it will not affect end users of the current Ethereum proof-of-work blockchain.
- In order to encourage robust code review of the Altair upgrade, the bug bounty bonus has been doubled until Nov. 27.
- More information on how to update nodes and validators is available here.
Read more: What Eth 2.0 Validators Can Expect After the ‘Altair’ Upgrade
More For You

A draft XRPL amendment notes that flash loan attacks are "structurally impossible" on the network because of how its transactions are built, an architectural quirk that has spared the chain from the exploit class that has cost Ethereum DeFi billions.
What to know:
- Recent DeFi exploits on protocols like Thorchain, Drift and KelpDAO have relied on flash loans, a mechanism that does not exist on the XRP Ledger.
- Because XRPL transactions are atomic and cannot include composable intra-transaction calls, flash loan attacks are structurally impossible on the network.
- As XRPL pursues AMM upgrades...
Top Stories











