To migrate your subgraph from Ethereum to ArbitrumOne…

Please log into thegraph.com/explorer using the wallet that owns the subgraph. Once you go to the page of your subgraph, you’ll see a button for migrating the subgraph to Arbitrum One.

It’ll initiate a process that will migrate your subgraph to Arbitrum as well as the underlying curated signal. This page will guide you through all the steps, which will involve signing transactions on Ethereum and on Arbitrum One. The whole process will take 20-30 minutes. Upon successful migration, the original Ethereum subgraph API endpionts will continue to work for about 48 hours before it’s no longer indexed.

A few things to note during the migration process:

• You’ll be asked to specify which address should own the subgraph on Arbitrum. Please make sure you choose an address you have full access to on Arbitrum, especially if you’re using a multisig wallet like Safe.
• Once you initiate the process, please make sure to complete it as soon as possible because if you don’t complete it in 7 days, you will lose the subgraph.
• Please have some ETH ready in your wallet to pay for gas on both Ethereum and Arbitrum One
• In the unlikely event you were not the first to curate your subgraph on Ethereum, you may end up losing a small amount of the original curation signal.

For a more detailed guide on this process and explanations on what happens under the hood, please see this blog post: https://thegraph.com/docs/en/arbitrum/l2-transfer-tools-guide/