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What is a rollup in blockchain?

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In blockchain, a rollup is a layer 2 scaling solution that aggregates multiple transactions off-chain and then submits a single compressed transaction to the main chain. This helps in reducing the load on the main blockchain while still ensuring security and decentralization. Rollups are often used to increase the transaction throughput and decrease the transaction costs on blockchain networks.
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In blockchain technology, a rollup is a layer 2 scaling solution that aggregates multiple transactions off-chain before settling them on the main blockchain. This helps reduce congestion on the main blockchain and improve scalability and efficiency of the network.

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