What is Arbitrum (ARB)?

Deep Dive

1. Purpose & Value Proposition

Arbitrum exists to scale Ethereum. It addresses the core limitations of high transaction fees (gas) and network congestion by moving the computational load off the main Ethereum chain. This allows users and developers to interact with Ethereum applications at a fraction of the cost and with near-instant speed, while still benefiting from Ethereum's robust security.

2. Technology & Architecture

Arbitrum uses a technology called optimistic rollups. It processes thousands of transactions off-chain, bundles them into a single batch, and posts a cryptographic summary to Ethereum. The system is "optimistic," meaning it assumes transactions are valid unless challenged within a 7-day dispute window. It is also fully compatible with the Ethereum Virtual Machine (EVM), allowing developers to easily port their existing Ethereum apps.

3. Tokenomics & Governance

The ARB token has a maximum supply of 10 billion and functions primarily as a governance token. Holders can vote on proposals that shape the protocol's future, fund ecosystem projects, and elect a Security Council. A key design choice is that gas fees on the network are paid in ETH, not ARB. This separation aims to provide users with stable fees and ensures governance power is held by those invested in the network's long-term direction.

Conclusion

At its core, Arbitrum is infrastructure that expands Ethereum's capacity through scalable rollup technology, governed by a decentralized community of ARB holders. How will its evolving governance model shape the next wave of onchain applications?