Vitalik Buterin says L2s using Celestia are validiums, not genuine rollups
The Ethereum co-founder has sparked a debate on whether validiums are in the same category as layer 2 rollups.
Ethereum co-founder Vitalik Buterin has sparked discussion on how various layer 2 scaling solutions are classified, claiming that the blockchain’s validiums are not genuine rollup solutions.
On Jan. 16, Buterin agreed with a comment posted to X (Twitter) by Daniel Wang, the founder of the Ethereum rollup solution Taiko, who said if an Ethereum rollup uses another data chain for data availability — such as the modular blockchain Celestia — then it’s an Ethereum validium.
“This is correct,” Buterin replied. “The core of being a rollup is the unconditional security guarantee: you can get your assets out even if everyone else colludes against you.”
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