DeFi on Arbitrum — The Complete Guide (2026)

What is Arbitrum?

Arbitrum is an Ethereum Layer 2 network built by Offchain Labs. It uses Optimistic Rollup technology to batch transactions off-chain, then post compressed data to Ethereum mainnet for security. The result: Ethereum-grade security with dramatically lower fees and faster confirmations.

Arbitrum launched its mainnet in August 2021 and introduced Nitro — a major upgrade in August 2022 that replaced the custom virtual machine with a WASM-based architecture, reducing fees further and improving throughput. Since then, Arbitrum has consistently held the largest TVL of any L2.

Key protocols on Arbitrum

Arbitrum's DeFi ecosystem is the most mature of any L2. Here are the protocols that define it:

GMX

GMX is Arbitrum's flagship protocol and one of DeFi's most successful perpetual futures platforms. It allows traders to open leveraged long or short positions on BTC, ETH, and other assets with up to 100x leverage. Liquidity providers deposit into the GLP (V1) or GM (V2) pools and earn a share of trading fees.

GMX popularized the "real yield" narrative — fees paid in ETH and USDC rather than inflationary token emissions. For background on how DeFi trading works, see our introductory guide.

Camelot

Camelot is Arbitrum's native DEX, combining concentrated liquidity with a launchpad for new Arbitrum projects. Its GRAIL/xGRAIL tokenomics reward long-term stakers, and it has become the default liquidity venue for many Arbitrum-native tokens.

Pendle

Pendle lets you separate yield-bearing tokens into their principal and yield components, then trade them independently. This enables fixed-rate yield strategies and yield speculation. Pendle found massive product-market fit during the LST/LRT wave of 2024 and has significant deployment on Arbitrum. Learn more about yield strategies in What Is Yield Farming?

Radiant Capital

Radiant enables cross-chain lending using LayerZero's messaging protocol. Users can deposit collateral on one chain and borrow on another. Notably, Radiant suffered a significant security breach in October 2024 when attackers compromised its multisig, resulting in approximately $50M in losses. This highlights the importance of understanding protocol risk.

Silo Finance and Jones DAO

Silo Finance isolates lending risk by creating separate markets for each token pair — if one asset is exploited, other markets are unaffected. Jones DAO builds options-based yield strategies, offering vaults that generate returns through structured products.

ARB token and governance

The ARB token was airdropped in March 2023 to early Arbitrum users. It serves as the governance token for the Arbitrum DAO, which controls a substantial treasury used for ecosystem grants, protocol incentives, and infrastructure development.

Key governance activities include funding programs like the STIP (Short-Term Incentive Program) and LTIPP (Long-Term Incentive Pilot Program), which distribute ARB tokens to protocols to boost liquidity and user adoption.

Arbitrum One vs. Arbitrum Nova

Arbitrum operates two chains:

• Arbitrum One: The primary chain for DeFi. Uses full Ethereum data availability — all transaction data is posted to Ethereum mainnet. This is where GMX, Aave, Camelot, and all major DeFi protocols live.
• Arbitrum Nova: Uses a Data Availability Committee (AnyTrust model) for even cheaper transactions. Optimized for high-throughput, low-value transactions like gaming and social applications. Lower security guarantees than One.

Advantages of Arbitrum

• Largest L2 DeFi ecosystem: More protocols, deeper liquidity, and more composability options than any other L2.
• Low fees: Typical transactions cost a few cents. Complex DeFi operations rarely exceed $0.50.
• Full EVM compatibility: Solidity contracts deploy on Arbitrum with minimal or no modification. Developers can port Ethereum dApps directly.
• Stylus expansion: Rust and C++ smart contracts open Arbitrum to a broader developer base and enable more efficient contract execution.
• Mature ecosystem: Years of operation, battle-tested protocols, and active governance.
• Ethereum security: Transaction data posted to Ethereum mainnet provides strong security guarantees.

Risks and considerations

• 7-day withdrawal delay: Withdrawing from Arbitrum to Ethereum mainnet via the canonical bridge takes 7 days due to the Optimistic Rollup challenge period. Third-party bridges can be faster but add trust assumptions. See What Is a Bridge?
• Sequencer centralization: Arbitrum's sequencer is currently operated by Offchain Labs. If the sequencer goes offline, users must wait for the delayed inbox mechanism to process transactions. Decentralization is planned.
• Protocol-specific hacks: The Radiant Capital exploit in 2024 demonstrated that individual protocols on Arbitrum can be compromised. Always research protocol security before depositing funds.
• Smart contract risk: As with all DeFi, smart contract bugs, economic exploits, and oracle manipulation are ongoing risks.
• ARB token inflation: Governance-approved incentive programs distribute ARB tokens, which can create sell pressure.

For a comprehensive overview of DeFi risk management, see Understanding Risk in DeFi.

How CleanSky tracks Arbitrum

CleanSky supports Arbitrum natively. Paste any Arbitrum wallet address and CleanSky will automatically detect and display:

• Token balances (ETH, ARB, USDC, and all ERC-20 tokens on Arbitrum)
• GMX positions — GLP, GM pools, and open perp positions
• Camelot LP positions and staked xGRAIL
• Aave and Radiant lending and borrowing positions
• Pendle yield token positions (PT, YT, and LP)
• Silo Finance and Jones DAO vault positions

All Arbitrum positions are combined with your holdings on other supported chains into a single, unified portfolio view.

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