Bridging

How assets and messages move between a parent chain and a child Arbitrum chain: deposits, withdrawals, cross-chain messaging, and token gateway configuration.

Overview

Choose the right approach for bridging assets and messages.

Deposit ETH

Send ETH and messages from a parent chain to a child chain.

Deposit tokens

Move ERC-20 tokens from a parent chain to a child chain.

Withdraw ETH

Send ETH and messages from a child chain back to the parent chain.

Withdraw tokens

Move ERC-20 tokens back to the parent chain.

Cross-chain messaging

Retryable tickets, ArbSys, and the Outbox, with a worked example.

Standard gateway

Bridge an ERC-20 with no custom configuration.

Generic-custom gateway

Add custom child-chain token behavior on the built-in bridge.

Custom gateway

Build a gateway for cases the standard gateways don't cover.

Custom gas token chains

SDK support for chains that use a gas token other than ETH.

L1 to L3 teleportation

Bridge from Ethereum to an Arbitrum L3 in a single transaction.