Cross-chain · Base → Avalanche C-Chain
Swap WETH from Base to USDC on Avalanche C-Chain
Swap WETH from Base to USDC on Avalanche C-Chain. Base WETH leaves, and Circle's native USDC arrives on the C-Chain.
Approve 0x4200000000000000000000000000000000000006 on Base, chain 8453. Basescan shows that ERC-20, and the approval costs ETH. Native ETH, 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, is not the input. Receive 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E on chain 43114. Snowtrace shows Circle's native USDC, 6 decimals. The old USDC.e at 0xA7D7079b0FEaD91F3e65f86E8915Cb59c1a4C664 is not this credit. The C-Chain is not the X-Chain. You need AVAX before the USDC can move.
The allowance never leaves Base
Native USDC versus the older bridged token
AVAX, the X-Chain, and Tether
A usable arrival
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 Base to USDC on Avalanche C-Chain?
Approve 0x4200000000000000000000000000000000000006 on Base, chain 8453. Basescan shows that ERC-20, and the approval costs ETH.
Is this Avalanche USDC the old USDC.e?
No. USDC.e is 0xA7D7079b0FEaD91F3e65f86E8915Cb59c1a4C664. This route delivers 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E, Circle's native USDC on the C-Chain, chain 43114. Check Snowtrace. If the app still names the older contract, this credit will not satisfy that deposit. Read the address in the app and compare it on Snowtrace before you sign.
Can I pay with native ETH instead of WETH?
Not on this page. Native ETH is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE and pays the Base fee. The input is 0x4200000000000000000000000000000000000006. Wrap on chain 8453 first, or choose the route that sells the gas coin. An empty WETH balance cannot be approved. The gas coin and the wrapper are different balances on Base.
What has to sit beside the USDC?
AVAX, the C-Chain gas coin. USDC cannot pay fees, and Base ETH does not become AVAX. The X-Chain will not show this token. Fund AVAX on chain 43114 or Snowtrace can display a balance the wallet will not send. USDC never becomes the fee coin.
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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