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Rollup
Also: rollups, optimistic rollup, zk-rollup
A layer-2 design that bundles many transactions together and posts the results to the main chain.
A rollup executes transactions off-chain, compresses them, and posts the data to the main chain so anyone can reconstruct the state. Optimistic rollups rely on a challenge window. ZK rollups attach a zero-knowledge proofZero-knowledge proof A way to prove something is true without revealing the underlying data. of correctness.