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First identify the exact layer 2 (L2), read its official migration or shutdown notice, and check the chain’s official portal for a supported route for your specific token and destination. There is no universal L2 exit: supported assets, deadlines, withdrawal delays, and bridge availability differ by network. For Arbitrum Nova, the Arbitrum Foundation says the network was minimized rather than fully deprecated; its 90-day migration window ended September 2, 2026, but the FAQ says the canonical bridge remains accessible. Check the portal’s current status before making a transaction.
What does “shuts down” mean for your assets?
A shutdown notice may describe a full deprecation, reduced operational support, or a migration period during which an exit route remains available. Those situations are not interchangeable. An L2 may continue to operate while receiving less support or offering fewer third-party bridging choices.
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Start with the announcement published by the network itself. Confirm the network selected in your wallet matches the notice, and distinguish any migration deadline from the date a bridge is expected to stop working. The Arbitrum Foundation’s 2026 Nova FAQ is a specific example, not a general rule for other L2s: it describes Nova as moving to a lower-footprint model, with reduced support and potentially fewer third-party options, while the Arbitrum Canonical Bridge remains accessible through Arbitrum Portal.
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- Identify the exact chain. Check the network name in your wallet and match it to the official notice. Do not rely on a token name or a search result alone to identify the network.
- Open the portal from the network’s official site. Independently verify the portal domain; avoid bridge links from search ads or unsolicited social-media messages.
- Check the exact token and destination. Confirm the asset has a route to the network you want, then verify the destination network and recipient address. A direct L2-to-L2 route is not available for every token.
- Compare the route details before signing. Review the estimated delay, fees, minimum amount received, and any provider or liquidity-provider dependency. Check whether the transaction requires gas on the source chain and whether you will need gas on the destination chain for a later action.
- Submit the withdrawal and keep its transaction hash. Use the official interface’s current instructions. Do not assume that a submitted withdrawal is already spendable on the destination.
- Confirm completion on both networks. Check the source transaction and, after the route’s required finalization, the destination balance. Keep the transaction hashes and records until the funds are accounted for.
What route should I use?
The route that fits depends on your token, destination, time constraints, and tolerance for third-party dependency. A canonical bridge and a faster liquidity-provider route are different services with different trade-offs; a faster estimate does not make a route guaranteed.
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| Route type | Destination and timing | Cost and dependencies |
|---|---|---|
| Canonical withdrawal | Usually exits to Ethereum first; an additional bridge may be needed to reach another L2. Optimistic-rollup exits are described by ethereum.org as taking roughly seven days; actual chain instructions and finalization conditions govern the transaction. | Requires the relevant source and destination gas. Uses the network’s canonical route, but availability and supported tokens must be checked in that network’s official portal. |
| Liquidity-provider or third-party fast route | A provider may advance funds before the canonical optimistic-rollup challenge period finishes. Availability and supported destinations vary by provider and token. | May cost more and depends on continued provider support. Check current fees and the provider’s settlement and custody terms rather than assuming the route is guaranteed. |
| Nova canonical route to Arbitrum One | The Arbitrum Foundation’s 2026 FAQ says supported funds can withdraw directly from Nova to Arbitrum One through the Arbitrum Canonical Bridge in Arbitrum Portal. | Check that the specific asset is supported and that the route remains available in the portal. |
| Nova via Ethereum, then to Arbitrum One | For large transfers, the Nova FAQ describes withdrawing to Ethereum through Portal, waiting seven days, claiming on Ethereum, then bridging to Arbitrum One. | Requires completing the Ethereum claim and a separate bridge step; account for gas and the portal’s currently displayed route requirements. |
| Nova fast routes | The Nova FAQ names LI.FI-powered routes via Relay or Symbiosis for smaller or time-sensitive transfers. | The FAQ says these routes have higher fees and depend on third parties, so support may become less available. Verify live availability and terms before using one. |
How long does it take to withdraw from an L2?
There is no single Ethereum L2 withdrawal time. The protocol’s withdrawal and finalization design determines the delay, and the time shown for a third-party fast route is a separate provider-dependent estimate.
- Optimistic rollups: ethereum.org’s page, last updated June 23, 2026, describes a withdrawal challenge period of roughly seven days. The OP Stack Specifications describe a seven-day challenge period after a withdrawal is proven. These are system-specific guidance figures, not a measured average across all L2s.
- Arbitrum Nova route to Ethereum: the Arbitrum Foundation’s 2026 FAQ instructs users following its described route to wait seven days before claiming on Ethereum.
- ZKsync Chains: ZKsync Documentation states a three-hour withdrawal delay for ZKsync Chains. Its documented flow burns L2 tokens, sends an L2-to-L1 message, and allows finalization on the L1 bridge after proving message inclusion.
These times describe protocol or chain guidance; they are not promises about total end-to-end completion. Network conditions, the exact route, required claims, and any later bridge transaction can affect when funds are usable.
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Can I bridge directly to another L2?
Sometimes, but only when the exact token and destination have a supported route. A direct route can avoid first withdrawing to Ethereum, but it may rely on a third-party provider rather than the source chain’s canonical bridge. Check the route in the official portal and confirm the destination network and recipient address before approving it.
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Nova illustrates why checking the token matters: the Arbitrum Foundation FAQ says MOON has no direct route from Nova to Arbitrum One. Its described path is Nova to Ethereum, a seven-day confirmation wait, a claim on Ethereum, and then a bridge from Ethereum to Arbitrum One.
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What if my token is not supported?
Do not substitute a similarly named token or send it through an unverified route. Check the network’s official notice and portal for token-specific instructions, including the correct token contract and any stated deadline. If no supported route is shown, do not assume a generic bridge can recover or move it safely; the reviewed network guidance does not establish a universal recovery procedure for unsupported assets.
If the balance is part of a DeFi position, liquidity-pool share, or another contract rather than a plain wallet token, determine whether that position must be withdrawn or unwound before bridging. Keep the relevant records and use the protocol’s official instructions for that separate step.
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What to verify before approving a transaction
- The wallet is connected to the intended source network.
- The token contract and amount match the asset you intend to move.
- The destination network and recipient address are correct.
- The portal supports this token and route now, and any stated deadline has not passed.
- The displayed fees, minimum received amount, and required gas are acceptable; retain enough native gas asset for the transaction and any necessary follow-up.
- For a third-party route, you have checked current fees, provider support, and settlement or custody terms.
- You have saved the transaction hash and know what confirmation, claim, or finalization step remains.
Why official exit routes matter if an operator goes offline
Ethereum.org explains that optimistic-rollup transaction data posted to Ethereum can let another node reproduce the latest state and can provide data users need to create ownership proofs and withdraw. It also warns that designs that do not make necessary state data available can leave operators able to censor users or withhold data. These are architectural properties and caveats, not a promise that every L2, token, or bridge will remain usable during a shutdown. Follow the specific chain’s official exit instructions rather than treating the architecture as a substitute for a supported route.
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