Cross-chain · Arbitrum One → Ethereum

Swap ETH from Arbitrum One to WETH on Ethereum

Swap ETH from Arbitrum One to WETH on Ethereum. Native ETH leaves Arbitrum One and canonical WETH arrives on Ethereum.

This is not the wrap button inside one network. You spend native ETH, sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, on Arbitrum One, chain id 42161. Arbiscan is the explorer, and the network is not Nova. You can receive WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Ethereum. That contract is what Etherscan should show. It is not the Ethereum gas sentinel. Chain id 1 blocks are about 12 seconds. Wrapping locally would never produce that mainnet address.

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

A local wrap stops on Arbitrum

If you wrap ETH on Arbitrum One, you mint 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 and the coins stay on chain id 42161. This page does something else. It takes native ETH on Arbitrum One and can credit the Ethereum WETH contract 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Same idea of wrapped ether, two different deployments, two chain ids. Do not paste the Arbitrum WETH address into an Ethereum field and expect a match.

Reserve fee ETH before you set the amount

Native ETH pays the Arbitrum fee and is also the sold asset. The quote has to leave a remainder. If you unwrap nothing and simply spend the gas balance, watch the wallet's max button. It may offer a figure that fails once gas is added. WETH you already hold on Arbitrum is not spent here. Nova is not the fee network, even if the account dropdown looks similar.

Mainnet WETH still cannot pay mainnet gas

Arriving WETH does not give you a native ETH balance on Ethereum. Fees on chain id 1 come from the sentinel balance. If you later unwrap 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, that call needs ETH already present. Ethereum is where the wrapped contract lives. Read the minimum WETH on the quote, because ETH's price against the route can move before you sign.

Wrong if you wanted the gas coin on mainnet

Choose a different output if the Ethereum wallet must pay gas right away. WETH is not that balance. This page is also wrong if you only needed to wrap inside Arbitrum One, if you wanted Circle USDC or Tether, or if the coins you hold are already WETH at 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. Those wrapped coins need the WETH routes, not this native ETH route.

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 ETH from Arbitrum One to WETH on Ethereum?

This is not the wrap button inside one network. You spend native ETH, sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, on Arbitrum One, chain id 42161.

Is this just wrapping ETH on Arbitrum One?

No. A wrap on Arbitrum One credits 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 and you remain on chain id 42161. This route spends native ETH, sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, and can credit Ethereum WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Check that address on Etherscan. Arbiscan is only the source side. Confirm that address on the explorer before you sign, and refresh the quote if it has expired.

Will the received WETH pay Ethereum gas?

No. Gas is native ETH. WETH is an ERC-20. The sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE on Ethereum is the balance that pays fees, and this route does not credit it. Unwrapping later needs some ETH in the account already. If you have none, pick a route that delivers native ETH instead of WETH.

Why leave some ETH unsold on Arbitrum?

The sold asset and the fee asset are the same native balance on chain id 42161. Selling the last wei leaves nothing for gas, so the signature cannot be submitted. Leave a cushion. Arbitrum Nova is a different chain and its ETH will not pay this route. Soft blocks near a quarter second are not a bridge schedule.

Live execution

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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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