Arbitrum

Arbitrum & Chainlink

Quick take: Arbitrum Arbitrum is an Ethereum scaling solution designed by Offchain Labs. Arbitrum uses a variation of one of Ethereum’s scaling solutions, known as an “Optimistic rollup”. The Arbitrum Rollup enables Ethereum smart contracts to scale by passing messages between smart contracts on the Ethereum primary chain and Arbitrum’s L2 chain, with the bulk of transaction processing completed on the L2 chain. Arbitrum supports arbitrary Ethereum Virtual Machine (EVM) smart contracts using common Ethereum tooling. Arbitrum smart contracts can be created using the Solidity programming language.

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Supported Chainlink services on Arbitum

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In depth

Arbitrum is an L2 optimistic rollup scaling solution for Ethereum, offering a unique combination of benefits:

• Trustless security: security rooted in Ethereum, with any one party able to ensure correct Layer 2 results
• Compatibility with Ethereum: able to run unmodified EVM contracts and unmodified Ethereum transactions
• Scalability: moving contracts’ computation and storage off of the main Ethereum chain, allowing much higher throughput
• Minimum cost: designed and engineered to minimize the L1 gas footprint of the system, minimizing per-transaction cost.

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Timeline

• 12 Aug 21. Chainlink oracles (Market & data feeds) go Live on Arbitrum One . Read the official Offchain labs announcement HERE.

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• 08 Mar 21. Chainlink oracles (Market & data feeds) go Live on the Arbitrum rollup testnet. Read the official Offchain labs announcement HERE.

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Developer tools

• Arbitrum RPC Endpoint Documentation
  • Directions on how to deploy an Arbitrum node for your Chainlink node's RPC connectivity
• Arbitrum Chainlink Node Environment Variables
  • Environment variables specific to Arbitrum Mainnet

Arbitrum Resources

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Our goal with the Wiki resource lists is to create authoritative archives for readings and other resources pertaining to specific topics.
As such, the Wiki aims to keep all resource lists current, consistent, accurate and clear.

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Timeline

Date	Media	Author	Title
14 Dec 22	Article	PR Newswire	Chainlink Automation is Now Live on Arbitrum One
12 Aug 21	Article	PR Newswire	Chainlink Oracles Now Running Live On Arbitrum One
08 Mar 21	Article	Offchain labs	Chainlink Oracles Now Live on the Arbitrum Rollup Testnet

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Bridging LINK Tokens to Ethereum Mainnet

Official Arbitrum <> Ethereum bridge

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Educational

Date	Media	Author	Title
03 Feb 22	Article	Chainlink	How To Build and Deploy a Smart Contract on Arbitrum
03 Feb 22	Video	Chainlink	How To Build and Deploy a Smart Contract on Arbitrum | Chainlink Engineering Tutorials
09 Dec 21	Article	Chainlink	Creating a Highly Scalable and MEV-Resistant DeFi Ecosystem Using Arbitrum and Fair Sequencing Services
21 Aug 21	Video	Chainlink	Ed Felten: Keynote on Arbitrum
15 Feb 20	Article	Offchain labs	Scalable & Low Cost Computation of Ethereum Smart Contracts Using Arbitrum, on the Chainlink Network
N/A	Official Docs	Chainlink	Arbitrum Feeds: Offiicial Chainlink documents

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