Why We Can't "Rollback" Ethereum

After yesterday's Bybit hack, crypto commentators are again asking why Ethereum cannot "rollback" the chain to reverse the hack.

Crypto commentators are once again asking why Ethereum cannot "rollback" the chain to reverse yesterday's hack after Bybit announced that the total losses now stand at $1.4 billion.

While experienced ecosystem actors near-unanimously agree that this is not possible, it's a question that continues to be asked by new crypto users and those unfamiliar with the technical and community aspects of cryptocurrency.

Here's a concise ELI5 on why a blockchain rollback is not possible in practice.

Two Historical Blockchain ReversalsBitcoin (BTC) enthusiasts may recall two instances where blockchain rollbacks occurred.

The first was in 2010 when a bug led to the creation of 184 billion BTC, which were later rolled back.

According to Tim Beiko, an Ethereum developer, this was possible due to the small size of the Bitcoin network at the time and because the bug created a clear protocol violation.

The second instance was the 2016 Ethereum The DAO hack, which saw stolen funds frozen for 30 days.

This provided time for the community to coordinate a recovery effort, ultimately leading to a hard fork that reversed the transactions.

However, both of these cases involved unique circumstances that do not apply to the Bybit hack.

Multisig Hack Challenges Beiko explained that the Bybit hack presents fundamentally different challenges.

The theft occurred through a compromised multisig interface, which made the malicious transactions appear legitimate to the signers.

From Ethereum's perspective, these transactions followed all protocol rules, leaving no technical basis for intervention.

Beiko also highlighted the increased complexity of modern cryptocurrency infrastructure, which made such rollbacks even more challenging.

Once stolen, the funds can quickly move through decentralized exchanges, lending protocols, and cross-chain bridges, thanks to the interconnected nature of crypto.

Any attempt to reverse transactions would disrupt this ecosystem, potentially affecting legitimate trades and settlements.

While Ethereum can still theoretically implement “irregular state changes” if funds are frozen and isolated, the last such proposal faced strong opposition.

This was a proposal to recover 500,000 ETH that were frozen due to a Parity wallet bug, but it was ultimately rejected over concerns about centralization and setting a precedent.

Crypto Mixer Platform Rejects Bybit's Request to Track Stolen Funds as Hackers Begin Laundering ETH

SlowMist reports that hackers began laundering the stolen ETH through eXch, also known as the coin mixer platform used by North Korean hackers to launder illicit crypto funds.

According to SlowMist, the stolen ETH was being converted into BTC, Monero (XMR), and other cryptocurrencies through eXch.

SlowMist also highlighted eXch's involvement in several security incidents, including the exposure of personal information belonging to industry security personnel, and urged all platforms to enhance risk controls for funds originating from eXch.

SlowMist's founder further noted that eXch has a history of hostile behavior toward security researchers, and they also highlighted the importance of exchanges having stronger risk controls for funds coming from the platform.

This development highlights the rapid movement of assets through mixing services, which demonstrates why technical solutions like rollbacks are no longer viable for major thefts in today's crypto ecosystem.