The second largest blockchain in the world launched its long-awaited update known as the merge on Thursday morning, switching the network from a proof-of-work to a proof-of-stake consensus algorithm. Ethereum developers celebrated the upgrade alongside other prominent community members via a live video stream. Over 40,000 people watched the live stream. Ethereum co-founder Vitalik Buterin marked the event on Twitter, stating that it is a 'big moment for the Ethereum ecosystem.
The update, known as Paris, followed last week’s Bellatrix upgrade, which prepared Ethereum’s consensus layer for the main event. From one block to another, Ethereum’s proof-of-work mainnet 'merged' with its proof-of-stake beacon chain.
The event was described as the equivalent of an airplane changing its engine mid-flight.
As of today, Ethereum will now rely on validators who 'stake' to achieve consensus and secure the network. Proof-of-Stake is expected to bring several significant changes to Ethereum. Perhaps the most notable of these changes is the estimated reduction in energy consumption by 99,95 percent. Since Ethereum will no longer rely on miners operating energy-intensive hardware, it will become much more efficient. Ethereum Foundation researcher Justin Drake stated that this move will reduce global electricity consumption by 0.2 percent during the live stream. Additionally, the network will stop paying ether to miners, leading to a reduction in issuance by about 90 percent. Previously, 13,000 ethers were produced daily, but now validators will only be paid around 1,600 ethers.
The merge is a significant event not only for the Ethereum community but also for the crypto community as a whole. Never before has a blockchain as large as Ethereum made such a type of transition.
Buterin has been discussing proof-of-stake since 2014, and it has been in development for years. It has suffered several delays until the Ethereum Foundation committed to launching it in 2022.
– Proof-of-stake has been the dream of the Ethereum ecosystem since almost the beginning – Buterin said during the live stream.
However, while most Ethereum enthusiasts anticipated the event, the merge was also a contentious topic among Ethereum miners as it essentially rendered them obsolete. Therefore, a group of proof-of-work advocates gathered over the summer to preserve a new version of the network called EthereumPOW. The PoW chain is expected to begin an airdrop for Ethereum holders within the next 24 hours.
Concerns about censorship resistance
Ahead of the merge, many advocates of crypto content within and outside the Ethereum ecosystem expressed concerns about the network’s ability to avoid censorship in light of U.S. Treasury sanctions against Tornado Cash. There are fears that Ethereum proof-of-stake could be easier to censor than the proof-of-work network because many validators of large networks like Coinbase are based in the U.S. To support Ethereum’s decentralization, these validators should process all transactions assigned to them, even if they are not in compliance with sanctions. Validators could theoretically decide not to process certain transactions to comply with sanctions, which could lead to censorship at the base layer.
Coinbase CEO Brian Armstrong commented on this issue when discussions about the network’s censorship resistance raged last month, stating that the crypto exchange would rather give up staking than engage in censorship. Vitalik Buterin confirmed in a tweet that he would consider censorship an attack on the network and advocate for slashing, a process in which stakers lose ether as a penalty for misbehavior or failing to validate transactions as needed.
What’s next for Ethereum?
Ahead of the merge, much of the community’s attention was focused on what the update could mean for Ethereum’s native asset, ether. The second-largest cryptocurrency has risen more than 100 percent from its June lows over the summer, driven by growing anticipation for today’s launch. Several tokens associated with Ethereum in the ecosystem, such as Lido’s LDO and Ethereum Classic, have also seen gains. Ether briefly surpassed $2,000 but has since retreated.
