description Arbitrum Overview
Arbitrum provides Ethereum scaling through rollup networks, with Arbitrum One using an optimistic rollup approach. Transactions are executed away from Ethereum's main execution environment and their data is submitted to Ethereum. By spreading the cost of that settlement across many transactions, the system is designed to reduce fees while retaining a connection to Ethereum's security. The network supports Ethereum-style applications, making it relevant to decentralized finance users and developers seeking a less costly place to interact with contracts.
Its distinction is that execution happens on a separate layer while Ethereum remains part of the settlement process. This relationship does not make every operational detail identical to Ethereum itself. Fees and activity change over time, so its usefulness is better described through its architecture than through a fixed claim about market position.
help Arbitrum FAQ
What is Arbitrum One used for?
Arbitrum One is an Ethereum Layer 2 network used for cheaper and faster smart contract transactions. It runs many DeFi apps while settling security back to Ethereum.
Does Arbitrum use ETH or ARB for gas?
On Arbitrum One, users generally pay gas fees in ETH. ARB is the governance token for the Arbitrum DAO, not the standard gas token on Arbitrum One.
What is the difference between Arbitrum One and Arbitrum Nova?
Arbitrum One is the main general-purpose rollup for Ethereum apps. Arbitrum Nova is a separate chain designed for lower-cost use cases, including gaming and social applications.
What kind of rollup is Arbitrum?
Arbitrum is an optimistic rollup. That means transactions are posted with the assumption that they are valid, while a challenge system can dispute invalid results.
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