Cross-chain · Base → Arbitrum One

Swap WETH from Base to ETH on Arbitrum One

Swap WETH from Base to ETH on Arbitrum One. Base WETH leaves, and native ETH arrives on Arbitrum One, chain 42161.

This is not an unwrap on Base. Unwrapping burns 0x4200000000000000000000000000000000000006 and returns ETH on chain 8453. This route takes that wrapper, visible on Basescan after you approve it, and credits native ETH on Arbitrum One. Quotes write the arrival as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. Arbiscan shows the account balance, not a token. WETH on One is 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 and is not the result. This is not Nova.

Diagram for Swap WETH from Base to ETH on Arbitrum One
WETH leaves Base. ETH is what can arrive on Arbitrum One.

Unwrap locally only if you are staying

A local unwrap gives you Base ETH, which pays Base fees and never appears on Arbiscan. Use it when a Base app needs the gas coin. Use this page when an Arbitrum One app needs the gas coin. The approval on the wrapper still costs a little Base ETH, so do not sit at zero ETH while holding only WETH.

The arrival can pay One, the input could not

Once native ETH is credited on chain 42161 it can pay later transactions there. Do not treat the quoted amount as spare gas after those transactions. WETH could not have paid One fees even if you had bridged the wrapper unchanged. If a pool wants the WETH contract, you finished on the wrong asset and would still wrap.

What this page will not do

It will not deliver USDC, USDT, or ARB. It will not deliver canonical WETH on Ethereum at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. It will not spend native ETH, because the input is the wrapper. It will not credit Nova. WBTC is unrelated, and WBTC is not native bitcoin.

Reading the account, not the token

Look at the ETH line on Arbiscan after the WETH debit on Basescan. Trade on Arbitrum is One, chain 42161. A token transfer of WETH means you used another route. No bridge duration is stated. Reject the quote if the minimum ETH is too small for the wrapper you give up.

Legal

Risk disclosure

XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.

Frequently asked questions

What is the best way to swap WETH from Base to ETH on Arbitrum One?

This is not an unwrap on Base. Unwrapping burns 0x4200000000000000000000000000000000000006 and returns ETH on chain 8453.

Is receiving ETH the same as receiving WETH on One?

No. Native ETH is the gas coin, marked 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, and Arbiscan shows it on the account. WETH is 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. Pools that take only the contract will ignore the native balance until you wrap on chain 42161. That wrap is not part of this route at all.

Can I just unwrap Base WETH?

You can, and the ETH stays on Base, chain 8453. This route delivers ETH on Arbitrum One, which you check on Arbiscan, and it spends 0x4200000000000000000000000000000000000006 only after an approval. The tickers match. The chains do not. A local unwrap never creates the One balance.

Does the ETH that arrives pay gas on One?

Yes, it is the gas coin on chain 42161, not Nova. You still needed ETH on Base to approve the WETH and send the swap. Those are two balances. The amount that arrives is the quote, not a promise that surplus remains after the next transfer.

Live execution

Trade on XAUConnect

Open the swap page with this cross-chain route pre-selected, then connect your wallet on the source chain to quote and execute. You keep the keys.

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