What is a zkRollup?

What is a zkRollup?

A zero-knowledge rollup (zkRollup) is a type of Layer 2 scaling solution on Ethereum that ensures a much higher throughput and much lower costs without sacrificing security. 

It does this by bundling up hundreds of transactions into one and moving them off-chain. There, it generates a cryptographic validity proof and sends it back to the main blockchain.

The fact that Ethereum verifies these proofs, and stores enough data to tell what off-chain account owns what, means that zkRollups inherit the same non-custodial security as Ethereum, but can run much faster.

For more in-depth technical info, read our Design Doc.

Additional learning material

Zero-Knowledge Rollups | ethereum.org

ZK-Rollups - Ethhub

What Are Zk-SNARKs and How Do They Affect Digital Privacy?

Computer Scientist Explains One Concept in 5 Levels of Difficulty | WIRED

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