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Activity Metrics
Independent verification is recommended.
What is Arbitrum One?
Ethereum's largest L2 by ecosystem, using interactive multi-round fraud proofs and powering dozens of Orbit L3s. While competitors build monolithic chains, Arbitrum enables anyone to launch custom chains using their battle-tested stack. The key difference: Arbitrum's interactive fraud proofs isolate disputed computations for efficiency, plus Stylus enables WASM smart contracts in Rust/C++ alongside Solidity — cutting compute costs by 10x for intensive apps.
Best for: DeFi protocols needing deep liquidity, compute-heavy applications using Stylus, projects wanting to launch their own Orbit L3 chain.
Technical: Optimistic rollup with interactive multi-round fraud proofs, Nitro stack with AVM, Stylus WASM support, and Orbit chain deployment framework.
Security & Data Availability
- Uses interactive multi-round fraud proofs that isolate disputed computation steps for efficiency.
- BoLD protocol (2024) prevents delay attacks with execution history commitments.
- Posts compressed calldata to Ethereum; inherits L1 security with 7-day challenge window.
Infra & Execution
- Nitro stack with custom Arbitrum Virtual Machine (AVM) supporting all EVM languages.
- Stylus enables WASM contracts in Rust/C++, reducing compute costs by ~10x.
- Orbit framework lets projects deploy custom L3s on Arbitrum (30+ chains live).
Performance
- ~10-50x cheaper than Ethereum L1, more expensive than Nova's sub-penny fees.
- Handles highest gas throughput in Ethereum ecosystem via Orbit chains.
- Calldata compression and batching optimize costs.
Use Cases
- DeFi giants: GMX ($671M TVL), Radiant Capital (largest lending), Camelot DEX (native, $75M TVL)
- Orbit L3s: Xai (gaming), Proof of Play Apex/Boss, Degen Chain, Sanko, 30+ chains live
- Stylus apps: Renegade, Fairblock, Crypto Valley Exchange using WASM for compute optimization
- Native protocols: Arbitrum-first projects leveraging deep liquidity and ecosystem
Trade-offs
- Centralized sequencer operated by Offchain Labs — censorship risk.
- 7-day withdrawal delay for fraud proof window.
- Verifier whitelist still active — not fully permissionless.
- Ecosystem fragmentation as projects move to Orbit L3s.
Contract Languages
This blockchain supports the following smart contract languages: