Cross-chain · Base → Ethereum

Swap ETH from Base to USDT on Ethereum

Swap ETH from Base to USDT on Ethereum. You sell native ETH on Base and you receive Tether USDT on Ethereum.

Native ETH on Base is written as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. That value is the gas coin on chain 8453, visible on Basescan as the account balance, not as an ERC-20 page. Tether USDT on Ethereum is 0xdAC17F958D2ee523a2206206994597C13D831ec7. Open it on Etherscan. Ethereum is chain 1 and a block is about 12 seconds. USDT here has 6 decimals. It is not Circle USDC and it is not WETH.

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

Selling the fee token on purpose

This route only makes sense when you want Tether's dollar more than you want Base ETH. Because the thing you sell is also the fee token, size the send so the remainder still covers gas on Base. A wallet that shows zero ETH after you type the amount will fail before any bridge starts. WETH is not a substitute input. ETH and WETH are different balances even on the same chain.

Tether's contract, including its rough edges

Ethereum USDT is an old token. Its transfer does not behave like a textbook ERC-20 in every tool, and Tether can freeze listed addresses. Neither fact makes a random USDT copy acceptable. The contract on the quote must be 0xdAC17F958D2ee523a2206206994597C13D831ec7. If your counterparty freezes or rejects Tether, Circle USDC is the other major dollar, and this page does not deliver it.

What you will not hold at the end

You will not hold native ETH on Ethereum merely because you started with ETH on Base. You will not hold Maker DAI. You will not hold WBTC, and WBTC would not have been native bitcoin anyway. You hold USDT, an ERC-20, on chain 1. Moving it requires ETH you did not buy in this swap.

Tracking without a shared hash

Basescan records the ETH leaving chain 8453. Etherscan records USDT arriving on chain 1. Those are two pages. How to bridge assets between chains walks through that split. Do not resend because the Ethereum token page is still quiet while the Base debit is already final. The extra wait is the bridge, and it has no promised length.

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 USDT on Ethereum?

Native ETH on Base is written as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. That value is the gas coin on chain 8453, visible on Basescan as the account balance, not as an ERC-20 page.

Is the USDT I receive able to pay mainnet fees?

No. Fees on Ethereum are native ETH. USDT at 0xdAC17F958D2ee523a2206206994597C13D831ec7 is Tether's token, 6 decimals, and wallets cannot use it as gas. Your Base ETH was the input, so it is gone if you sold it. Keep a separate mainnet ETH balance before you try to transfer the USDT.

What if the wallet wants me to approve ETH?

Native ETH is not approved. The placeholder 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE stands for the gas coin on Base, chain 8453. An approval popup for a token means the selected input is an ERC-20 such as WETH or USDC, which is a different route. Recheck the asset line on the quote.

I wanted Circle dollars. Is this close enough?

No. Circle's Ethereum USDC is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48. Tether is a different company and a different contract. Price proximity is not acceptance by a whitelist. If the written instruction says USDC, leave this page. A whitelist that names Circle will reject Tether even when both prices sit near a dollar.

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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