Arbitrum

Arbitrum is an Ethereum Layer 2 scaling solution based on Optimistic Rollup technology, designed to address congestion and high gas fees on Ethereum. It achieves high throughput and low transaction fees by processing a large number of transactions off-chain in batches and then submitting the results to the Ethereum main chain.

Arbitrum mainly consists of the following three chains:

- Arbitrum One

It is the first launched, most widely used, and mature general-purpose Layer 2 main chain. By processing transactions in batches and publishing data on Ethereum, it realizes a low-cost and high-throughput on-chain interaction experience. Meanwhile, it maintains high compatibility with Ethereum in terms of security and composability, mainly used for DeFi, NFT, and infrastructure projects.

- Arbitrum Nova

The second main chain launched by the Arbitrum team, adopting the AnyTrust architecture, focuses on providing an extremely low-cost and high-throughput transaction environment. It does not fully publish data to Ethereum but uses a trusted data committee to ensure data availability, suitable for cost-sensitive application scenarios that tolerate certain trust assumptions, such as high-frequency trading applications.

- Arbitrum Orbit

It is not a specific chain but a chain-building framework, allowing developers to freely build exclusive Layer 2 or Layer 3 blockchains based on the Arbitrum technology stack. Developers can set their own fee structures, governance rights, virtual machines, etc., forming "modular" and "application sovereign chains".