Arbitrum docs
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Arbitrum essentials

Core, language-agnostic guidance for building on Arbitrum — bridging, precompiles, the NodeInterface, and how Arbitrum differs from Ethereum.

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Core, language-agnostic guidance for building on Arbitrum: bridging, oracles, precompiles, the NodeInterface, RPC and provider references, networks, gas, and how Arbitrum differs from Ethereum. This guidance applies whether you write contracts in Solidity or Stylus.

Bridging

Move ETH, tokens, and messages between parent and child chains.

Arbitrum vs Ethereum

Where Arbitrum's behavior differs from Ethereum's.

Precompiles

Arbitrum-specific precompiled contracts and their interfaces.

NodeInterface

Query gas estimates and chain data through the NodeInterface.

Reference

Chain parameters, contract addresses, providers, and tooling.

Machine Payments Protocol

Implement MPP for machine-to-machine payments.

How is this guide?

Estimate gas

Learn how to estimate gas costs on Arbitrum using eth_estimateGas, NodeInterface.gasEstimateComponents(), and the Arbitrum SDK. Covers the two-component fee model with L1 data costs and L2 execution costs.