Cross-chain · Base → Ethereum

Swap ETH from Base to WETH on Ethereum

Swap ETH from Base to WETH on Ethereum. Native ETH leaves Base, and canonical WETH arrives on Ethereum, which is not the same as wrapping in place.

The ETH you send is the gas coin on Base, chain 8453, written as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. Basescan shows the account, not a token contract. The WETH you receive is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. Ethereum is chain 1 and blocks are about 12 seconds. Wrapping on Base would have minted 0x4200000000000000000000000000000000000006 and stayed on Base. That is a different action.

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

This is not the wrap button

A wrap on Base takes native ETH and gives you Base WETH at the predeploy 0x4200000000000000000000000000000000000006. You stay on chain 8453. You can unwrap there and get Base ETH back. This page does something else. It sells or bridges that value toward Ethereum and credits canonical WETH on mainnet. If you only needed a tokenized ETH balance for a Base app, stop and wrap locally.

Canonical WETH still cannot pay gas

0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 is an ERC-20. Ethereum miners and validators are paid in native ETH, the 0xEeee placeholder, not in WETH. After this route you can hold a large WETH balance and still be unable to unwrap it if the Ethereum account has no ETH. Get a small gas balance onto chain 1 before you depend on the unwrap.

When the route mismatches the order

It is the wrong route if the order says native ETH on Ethereum. It is wrong if the order says USDC, USDT, or DAI. It is wrong if someone said bitcoin: WBTC is not native bitcoin, and this route does not deliver WBTC either. It is wrong if your input balance is already Base WETH, because this page spends unwrapped ETH.

Read both explorers in order

Start on Basescan and confirm ETH left the account on chain 8453. Then open Etherscan and look for WETH at the canonical contract, not for a rise in the native ETH line. How cross-chain bridges work is the short version of why those receipts differ. Do not treat 12 second blocks as a delivery promise.

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 Ethereum?

The ETH you send is the gas coin on Base, chain 8453, written as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. Basescan shows the account, not a token contract.

If I wrap on Base, do I get this WETH?

No. Wrapping on Base credits 0x4200000000000000000000000000000000000006 on chain 8453. This route credits 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Ethereum, which you check on Etherscan. The tickers match. The contracts and the chains do not. If the app you are funding lives on Base, the local wrap is the whole task.

Will the WETH that arrives pay the next Ethereum fee?

No. WETH is not gas. Native ETH is gas, and the placeholder 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE is how interfaces refer to it. You need some of that native coin on chain 1 before you can unwrap or approve the WETH you just received. Until that gas coin is present, the WETH can sit on Etherscan and still be immovable.

I meant to keep ETH, not sell it into a wrapper on another chain. What now?

Do not sign. A local wrap on Base keeps you on Base. A route that delivers native ETH on Ethereum keeps the gas coin as the gas coin. This page is only right when canonical mainnet WETH is the balance an application asked for. A local wrap leaves you on Base with a different contract.

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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