Bridging
Move ETH, tokens, and messages between parent and child chains.
How assets and messages move between a parent chain and a child Arbitrum chain: deposits, withdrawals, cross-chain messaging, and token gateway configuration.
This section is being ported. Deposit, withdraw, and gateway guides will land here as content is migrated.
Arbitrum essentials
Core, language-agnostic guidance for building on Arbitrum — bridging, precompiles, the NodeInterface, and how Arbitrum differs from Ethereum.
Cross-chain messaging
Learn how to send cross-chain messages between Ethereum and Arbitrum using retryable tickets, the ArbSys precompile, and the Outbox contract. Includes a complete Greeter tutorial demonstrating both parent-to-child and child-to-parent messaging.