Cross-chain · Ethereum → Arbitrum One

Swap WETH from Ethereum to ARB on Arbitrum One

Swap WETH from Ethereum to ARB on Arbitrum One. Wallets that want the ARB token on chain 42161 spend wrapped ETH on Ethereum and receive that governance token.

You approve WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. You receive ARB at 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbiscan. ARB does not pay gas on Arbitrum One. Unwrapping WETH would have given you native ETH on Ethereum instead, and that ETH does not pay chain id 42161 fees and is not the ARB token. Mainnet blocks are about 12 seconds. The destination is Arbitrum One, not Nova. You need ETH on chain id 1 to start and ETH on chain id 42161 after the ARB arrives. Read the ARB token on Arbiscan after you switch.

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

The output is not gas and not WETH

0x912CE59144191C1204E64559FE8253a0e49E6548 is an ERC-20. Once the wallet is on chain id 42161, import it from Arbiscan. The native ETH line will not increase because of this pair. If you needed gas, choose the route that outputs the 0xEeee placeholder on Arbitrum One.

Approve wrapped ETH, pay native ETH

The contract that decreases is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. The fee on chain id 1 is ETH. A wallet with WETH and no ETH cannot start. How cross-chain bridges work is why the source chain collects a fee in its own coin first.

Unwrap does not produce ARB

Withdrawing WETH returns ETH on Ethereum. Swapping WETH for USDC or USDT on Ethereum keeps you on chain id 1. This route is the wrong tool for both. Use it when the missing token is ARB on Arbitrum One. If you already hold an Arbitrum asset, buy ARB there.

ETH on Arbitrum One still matters

The ARB you receive cannot pay the next transaction. Keep ETH on chain id 42161. Nova will not list this token. Read the full address on Arbiscan before you deposit it into a governance or pool contract.

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 Ethereum to ARB on Arbitrum One?

You approve WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. You receive ARB at 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbiscan.

Does this unwrap WETH into ETH first?

The result you hold is ARB on chain id 42161, not native ETH on Ethereum. WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 is what you approve on Etherscan. A local unwrap credits ETH on chain id 1 and stops. If ETH on Ethereum is the goal, do not open this pair.

How do I confirm the ARB arrived?

Set the wallet to Arbitrum One, chain id 42161, and open 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbiscan. Nova will not show it. The native gas line is ETH, not ARB. If the wallet is still on Ethereum, you will keep seeing WETH and miss the token.

What if I hold WETH and no ETH?

Unwrap a small slice of WETH to native ETH on Ethereum so the approval can pay gas. Then spend the remaining WETH on this route. Chain id 1 will not accept WETH as a fee. The ARB you receive later cannot pay that first transaction, and it cannot pay chain 42161 fees either.

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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