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Arbitrum

ARB
Spot$0.084351updated June 20, 2026

Every TheChainPost story tagged with ARB. Price action, protocol news, regulation — all the Arbitrum coverage in one place.

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Arbitrum FAQ

What is Arbitrum?
Arbitrum is an optimistic rollup on Ethereum built by Offchain Labs. Mainnet launched August 2021 as Arbitrum One; a second chain — Arbitrum Nova — targets gaming/social with AnyTrust data availability. By early 2026 it is consistently the largest L2 by TVL, rivalled only by Base.
What does "optimistic rollup" mean?
Transactions posted to L1 are assumed valid by default. A 7-day challenge window lets any watcher submit a fraud proof to revert fraudulent batches. The sequencer (currently centralised, operated by Offchain Labs) orders transactions; decentralising it is on the roadmap. Security ultimately inherits from Ethereum.
What does the ARB token do?
ARB is the Arbitrum DAO governance token, airdropped March 2023. It votes on treasury spending and protocol upgrades — no staking, slashing, or sequencer role. All network security comes from Ethereum and the fraud-proof mechanism, not from ARB staking.
What can you build on Arbitrum?
Full EVM compatibility, plus Stylus (launched 2024) — a WASM-based runtime that runs Rust, C, C++ alongside Solidity contracts. Major apps include GMX and Radiant in DeFi, Treasure in gaming, and most L2 perps DEX flow. Fees run roughly 5-10% of Ethereum L1.

This is general information, not investment advice. Markets are volatile and rules vary by jurisdiction — consult a qualified advisor before making decisions.