Cross-chain · Base → Solana
Swap WETH from Base to USDT on Solana
Swap WETH from Base to USDT on Solana. Wrapped ETH leaves Base, and Tether's SPL USDT mint arrives on Solana.
The WETH you approve is 0x4200000000000000000000000000000000000006 on Base, chain 8453, on Basescan. Gas is ETH. The mint you receive is Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB. Solscan shows it. It is Tether, not Circle's EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v. Native ETH on Base is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE and is not the input. Phantom holds the SPL token. Solana does not use ERC-20 approvals. SOL pays Solana fees and is not included as the output.
Wrapper for Tether's mint
Circle would be the other mint
No Solana allowance
Skip the route when
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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 USDT on Solana?
The WETH you approve is 0x4200000000000000000000000000000000000006 on Base, chain 8453, on Basescan. Gas is ETH.
Which mint is the USDT?
Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB on Solscan. Circle's USDC mint is EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v. The source is Base WETH at 0x4200000000000000000000000000000000000006, which you approve on chain 8453. Ethereum's Tether contract will not find this SPL balance. Solscan and the Es9v mint are the check, in Phantom rather than MetaMask. Check that mint before you sign.
Do I approve anything on Solana?
No. Solana does not use ERC-20 approvals. The approval is Base WETH, paid in ETH. Phantom receives the mint. MetaMask cannot store it. SOL pays Solana fees and must already be in the Solana wallet if you need to move USDT after it arrives. There is still no ERC-20 approval on Solana.
What if I only have native ETH on Base?
This page will not see it. Native ETH is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE and pays gas on chain 8453. Wrap into 0x4200000000000000000000000000000000000006 first, or use the route that sells native ETH for the same Tether mint. An empty WETH balance cannot be approved. Wrap on Base first if the gas coin is all you hold.
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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