Withdrawing from an L2 to Ethereum: why the wait, and what to do when it ends

Why there is a wait

An L2 hands its results to Ethereum for confirmation. Before the official bridge releases money on Ethereum, it has to be sure that result is correct.

Chains like OP Mainnet, Base and Arbitrum post their results first, then leave time for anyone to challenge a wrong one. That time is the challenge period. ZK chains such as zkSync Era, Linea and Scroll wait for a proof to be generated and checked on Ethereum, and zkSync adds a further security delay.

The wait is part of the official bridge's security rules. The OP docs say plainly that it cannot be circumvented.

How long each chain takes

Based on each chain's official docs (checked 2026-11-05). Add the time you take to do each step yourself.

• OP Mainnet: a 7-day challenge period. Three steps: start on OP Mainnet; once that part of the chain has been posted to Ethereum, 'Prove' on Ethereum; after 7 days, 'Finalize' on Ethereum.
• Base: since the Beryl upgrade on June 25, 2026, the standard bridge waits 5 days, or 1 day when that result is backed by both a TEE proof and a ZK proof. Before you can prove, there is usually a wait of about 20–60 minutes. The steps match OP Mainnet: start, prove, finalize. Go by the time the bridge shows you.
• Arbitrum One / Nova: at least 7 days per the official docs, and the bridge countdown usually shows 7–8 days (the challenge period is 45,818 Ethereum blocks, about 6.4 days, plus some processing before and after). When the countdown ends, open your profile at the top right of the bridge, go to Transactions, and press Claim.
• zkSync Era: the docs give a security delay of at least 3 hours, and 1–2 hours more when the network is busy. The last step on Ethereum ('finalize withdrawal') can be submitted by anyone; whether it is done for you on mainnet, the docs don't say. If the bridge you used shows a Claim button, you need to press it.
• Linea: about 2–12 hours for ETH and regular tokens. Withdrawals from Linea to Ethereum always need a manual Claim on Ethereum (the official bridge's history marks them 'Ready to claim'). In this direction the official bridge also charges a 0.001 ETH anti-DDoS fee.
• Scroll: wait until the batch containing your transaction is finalized on Ethereum, then send one more 'Execute Withdrawal' transaction on Ethereum (the Claim button on the bridge). The current official docs don't say how long this takes.
• Other chains: chains built on the OP Stack don't necessarily match OP Mainnet; Base is already at 5 days. Withdrawing from an L3 to Ethereum takes two legs, each with its own wait, and the Arbitrum docs put the worst case with default settings at roughly two weeks. Check that chain's own docs.

What to do when the wait is over

On most official bridges, the money does not land in your wallet by itself when the wait ends. The Arbitrum docs say confirmation only makes a withdrawal claimable: someone has to execute it on Ethereum, and nothing does it automatically. Before its chain closed, Lisk reminded users that a withdrawal isn't complete until it's claimed.

• Go back to the same bridge page where you started, and connect the same wallet.
• Find the withdrawal in its history (History, Transactions or Activity) and press Prove, or Claim / Finalize, as prompted.
• This step sends a transaction on Ethereum, so you pay Ethereum gas. The OP docs note that the prove and finalize transactions on Ethereum usually cost much more than starting the withdrawal on the L2.
• If you withdrew from a smart contract wallet such as a Safe: the Arbitrum docs say it may not appear in the bridge's history, and you can search the history by the hash of the L2 transaction that started it, then Claim.

Taking longer than the docs say? Check these first

Don't start over. Check these one by one.

• OP Mainnet and Base: the wait runs at least from your Prove transaction, not from when you started. If you proved a few days late, the full wait runs from then. If the result you proved against is ruled invalid, you have to prove again, and the clock restarts.
• Arbitrum: in rare cases someone opens a challenge and the wait gets longer; the docs say that under BoLD an honest withdrawal is delayed by at most one more challenge period.
• ZK chains: zkSync says 3 hours is not a guarantee and it can take longer when the network is busy; Sophon says the time varies and to follow the status on its official withdrawal page.
• Arrived but not visible? zkSync says these withdrawals usually appear under 'Internal Transactions' on your Etherscan address page, not in the normal transaction list.
• Linea: withdrawals left unclaimed for more than 90 days no longer show in the official bridge app; you finish them manually using the official developer docs.
• If it still doesn't add up, ask only in the project's official Discord or help center, and ignore anyone who contacts you first.

What not to do

Being in a hurry is when people overpay or get scammed.

• Don't bridge again to 'speed it up'. A withdrawal you've started can't be cancelled (Arbitrum docs), and third-party fast bridges are separate services that don't shorten an official withdrawal already in progress (Base docs). Bridging again just sends another amount.
• Don't pay anyone who offers to 'speed up' or 'unlock' it. The wait is a protocol rule, and no one can skip it for a fee.
• Don't act on links from search results, DMs or replies. Use only the official bridge you started on, or a link the official account posted itself.
• DeFiExit only asks your wallet to share its address — it never asks you to sign, approve or send anything, and we never message first.

Related

• Exit deadlines: Sophon chain shutting down
• Exit deadlines: Blast L2 has shut down; official withdrawal site open until November 2027
• A chain is shutting down: how do I get my money out?
• The most common scams during shutdowns and migrations