Arbitrum docs
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Arbitrum vs Ethereum

Where Arbitrum behavior differs from Ethereum — gas, block numbers, RPC methods, and Solidity support.

Where Arbitrum's behavior differs from Ethereum's: the block gas limit, block numbers and time, RPC methods, Solidity support, and nonce management.

This section is being ported. The individual comparison pages will land here as content is migrated.

Withdraw tokens to parent chain

Step-by-step guide to withdrawing ERC-20 tokens from an Arbitrum child chain back to Ethereum (parent chain) using the token bridge gateway system, including the 6.4-day challenge period.

Block gas limit, numbers and time

Understand how Arbitrum handles block gas limits, block numbers, and transaction timing differently from Ethereum. Learn about parent chain gas components and block.number behavior on Arbitrum.