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Build on Scroll

While the Execution Node keeps Scroll running efficiently, it's the Rollup Node that truly connects it to the wider world of Ethereum. The Rollup Node ensures that everything happening on Scroll doesn't exist in a vacuum. It establishes the vital link to the robust security and vast ecosystem of Ethereum.

Section 2: Rollup Node

What is a Rollup Node?

Think of the Rollup Node as the bridge between the fast-paced world of Scroll and the secure, established realm of Ethereum. Similar to how a bridge connects two separate pieces of land, the Rollup Node acts as the critical link, ensuring communication and trust between Scroll and the Ethereum blockchain.

Why do we need a Rollup Node?

While the Execution Node streamlines and speeds up transactions on Scroll, it doesn't have the same level of security as Ethereum. This is where the Rollup Node steps in. It guarantees the ultimate security of Scroll by leveraging the power of Ethereum's vast network.

How does a Rollup Node work?

  • Data Bundler: The Rollup Node acts as a data courier. It collects batches of transaction data sent by the Execution Node on Scroll.
  • Compression Master: Like a smart packer, the Rollup Node compresses this data significantly, making it cheaper and faster to store on Ethereum. Imagine it as efficiently packing a week's worth of groceries into a single bag for easy transport.
  • Proof Provider: To ensure the validity of the transactions, the Rollup Node creates cryptographic proofs. These proofs act as undeniable evidence on the Ethereum blockchain, guaranteeing that the transactions on Scroll actually took place.

Why is the Rollup Node important?

The Rollup Node is crucial for maintaining trust and security within the Scroll ecosystem. It provides the best of both worlds:

Fast and Cheap Transactions: Users benefit from Scroll's high speed and low transaction fees.

Unwavering Security: They can rest assured knowing that all transactions are ultimately secured by the robust Ethereum network.

Imagine Scroll as a bustling marketplace, and Ethereum as a large, secure vault. The Rollup Node is like the trusted record keeper who:

Gathers Receipts: Collects transaction data (receipts) from the Scroll marketplace.

Reduces Paperwork: Efficiently compresses these receipts to save space in the vault.

Provides Proof of Purchase: Creates a verifiable record (cryptographic proof) on Ethereum to ensure the authenticity of transactions.

By acting as a bridge and a record keeper, the Rollup Node ensures a seamless and secure connection between Scroll and Ethereum.


The Rollup Node is the final piece of the puzzle, ensuring that Scroll's speed and affordability don't come at the cost of security and trust. By providing an efficient bridge to Ethereum, it gives users peace of mind knowing that their transactions are backed by the power of a well-established blockchain.

Together, the Execution Node and Rollup Node form a powerful duo that makes Scroll a compelling solution for scaling Ethereum. The Execution Node handles the heavy lifting of processing and validating transactions, while the Rollup Node secures, bridges, and establishes trust with the Ethereum network. This teamwork is what allows Scroll to offer its users speed, low fees, and security without compromise.

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