Cross-chain · Base → Arbitrum One

Swap ETH from Base to WETH on Arbitrum One

Swap ETH from Base to WETH on Arbitrum One. Native ETH leaves Base, and Arbitrum WETH arrives. That is not a local wrap.

Sell Base ETH, gas coin 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, chain 8453. Basescan shows the account. Keep a fee remainder. Receive 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 on Arbitrum One, chain 42161, on Arbiscan. That WETH cannot pay gas. Native ETH on One is the same placeholder style, a different balance. Wrapping on Base would mint 0x4200000000000000000000000000000000000006 and stay on Base. This is not Nova and not canonical Ethereum WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2.

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

Local wrap versus this destination

A wrap on Base takes native ETH and returns the predeploy 0x4200000000000000000000000000000000000006. You can unwrap on Base. Nothing in that pair of actions touches Arbiscan. This page is only useful when an Arbitrum One contract asked for 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. If the app is on Base, stop and wrap locally.

Unwrap later still needs gas ETH

WETH on One is not the fee token. To unwrap it you already need ETH on chain 42161. This route sold your Base ETH and did not deliver native ETH on One. Fund a small gas balance before you plan the unwrap. Otherwise the wrapper is visible and idle.

Orders that do not match

Native ETH on One is a different route. USDC, USDT, and ARB are different routes. Ethereum mainnet WETH is a different contract on chain 1. Nova is a different network. WBTC is not ether and is not native bitcoin. If your input is already Base WETH, this page, which spends unwrapped ETH, will not see it.

Explorer split

How to bridge assets between chains is the sequence. Basescan should show ETH leaving the account. Arbiscan should show WETH at the One contract, not a jump in the native ETH line. Twelve second Ethereum blocks are irrelevant here. No bridge duration is promised. Do not sign a minimum you dislike.

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 Base to WETH on Arbitrum One?

Sell Base ETH, gas coin 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, chain 8453. Basescan shows the account.

Does wrapping on Base give me Arbitrum WETH?

No. Wrapping on Base credits 0x4200000000000000000000000000000000000006 on chain 8453. This route credits 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 on Arbitrum One, which you check on Arbiscan. The tickers match. The chains do not. A One pool cannot see the Base predeploy. If the app lives on Base, wrap locally and do not use this bridge.

Will the arriving WETH pay gas?

No. Gas on chain 42161 is native ETH, the 0xEeee placeholder, not WETH. You need some native ETH on Arbitrum One before you can unwrap or approve the wrapper. ETH you kept on Base does not pay One. This route does not deliver that gas coin.

Is this Arbitrum Nova or Ethereum WETH?

Neither. The network is Arbitrum One, chain 42161, not Nova. Canonical WETH on Ethereum is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. If the order names that mainnet contract, or names Nova, leave this page. The input is native ETH on Base, not WETH. If you already hold the Base wrapper, this page will not spend it.

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