Cross-chain · Ethereum → Base
Swap WETH from Ethereum to USDC on Base
Swap WETH from Ethereum to USDC on Base. Holders of wrapped ETH who need Circle's native USDC on chain 8453 spend WETH and receive that dollar.
You approve WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. Withdrawing from that contract unwraps to native ETH and stays on Ethereum. This route spends the WETH and delivers 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basescan, Circle's native USDC, 6 decimals. Bridged USDbC at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA is not the receipt. Gas to start is still ETH on chain id 1, about 12 seconds a block. Base, chain id 8453, needs its own ETH before the USDC can move. Import the native contract from Basescan. USDbC will not reflect this route. Import native USDC from Basescan on chain id 8453. USDbC will not reflect this route, and Etherscan will not show the new dollars. Confirm the native USDC on Basescan before you deposit.
Unwrapping is the wrong tool
Native USDC versus USDbC
ETH gas beside the WETH
After the 6 decimal dollar arrives
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 USDC on Base?
You approve WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. Withdrawing from that contract unwraps to native ETH and stays on Ethereum.
Can I unwrap WETH and then bridge the ETH?
You can, and that is a different route. Withdrawing 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 returns native ETH on chain id 1. This page spends the WETH contract and pays Base native USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Choose the output the destination wallet is supposed to hold.
What do I approve on Etherscan?
Approve 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Do not approve Circle's Ethereum USDC for this pair. You still need native ETH for gas on chain id 1. Blocks are about 12 seconds. WETH is the asset being sold. ETH is only the fee. Confirm the full address on the explorer before you send it onward.
Which USDC will the wallet show?
Circle's native USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, 6 decimals, on Basescan. USDbC will not move. Set the wallet to Base, chain id 8453. If the balance looks enormous or tiny, re-import the contract and read its decimals before you deposit. Confirm the full address on the explorer before you send it onward.
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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