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ROLLUP: Base Kicks-Off Onchain Summer
Bankless
The Definition of Ethereum Rollups and Layer Twos According to Dankrad
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- If it doesn't use Ethereum for data availability, it's not an Ethereum rollup and therefore it's not an Ethereum layer too.
- The definition of a layer two and a rollup is a matter of debate.
- Precision in language and definition is important when discussing layer twos and rollups.
- According to Dankrad, a layer two or Ethereum rollup must have consensus on Ethereum and data availability on Ethereum.
- This definition excludes rollups like Valyttians, which park their consensus data on Ethereum but have data availability elsewhere.
- Examples of rollups with data availability outside of Ethereum include Arbotram Nova and Immutable.
- The polygon proof of stake system is moving towards a Valyttian type of architecture.
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