Get startedLaunch a chain Run a node Use the bridge How it works Notices

Launch a chain Run a node Use the bridge How it works Notices Notices Transaction submission changes Temporary pause on new Stylus activations Upgrade notice for ArbOS 61 Upgrade notice for ArbOS 51 Upgrade for the Fusaka transition

Chain info Glossary Contribute

Notices

Upgrade notices and required actions for Arbitrum chains and node operators.

Request an update

Upgrade notices for Arbitrum chains and node operators, including ArbOS upgrades and network transitions.

Transaction submission changes

Upcoming changes to eth_sendRawTransaction and eth_sendRawTransactionSync.

Stylus activation pause

Temporary pause on new Stylus activations on Arbitrum One and Arbitrum Nova.

Fusaka compatibility

What the transition to Fusaka requires.

ArbOS 61

Activation on Arbitrum One, Nova, and Sepolia.

ArbOS 51

Activation on Arbitrum One, Nova, and Sepolia.

How is this guide?

Transaction submission changes

Upcoming changes to how eth_sendRawTransaction and eth_sendRawTransactionSync respond on Arbitrum chains

For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append .md to any docs page URL for the markdown version of that page.

Ecosystem

Arbitrum.io Arbitrum chains Arbitrum Foundation Arbitrum whitepaper

Products

Portal Bridge Network status Governance docs

Community

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Resources

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