Cross-chain · Solana → Base
Swap USDT from Solana to WETH on Base
Swap USDT from Solana to WETH on Base. Tether's SPL mint leaves Solana, and the Base WETH predeploy is what can arrive. Wrapped ether is not the L2 fee coin.
Spend Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB in Phantom. Solscan shows the mint. There is no ERC-20 approval. WETH is 0x4200000000000000000000000000000000000006 on chain id 8453. Basescan is the check. Other rollups reuse that hex without sharing state. Native ETH is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE and is not included. Mainnet WETH is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, chain id 1, about 12 second blocks, Etherscan. WBTC is not this token.
The predeploy on Base is not the predeploy on another rollup
Hold ETH or the wrapper cannot move
Do not time Basescan with a mainnet block
A Circle dollar on Base is a different job
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 USDT from Solana to WETH on Base?
Spend Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB in Phantom. Solscan shows the mint. XAUConnect compares live routes and lets your own wallet sign.
Does Base WETH from Solana USDT pay gas?
No. The predeploy 0x4200000000000000000000000000000000000006 cannot. ETH, sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, pays chain id 8453. Tether's mint left Solana. Hold ETH and check Basescan. Another rollup's copy of the address is not yours. If you only needed fees, this route is wrong. Confirm the contract on the explorer before you sign.
Is this canonical WETH on Ethereum?
No. That contract is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on chain id 1, Etherscan, about 12 second blocks. This route credits Base only. If the pool is on mainnet, do not sell the Solana mint into the predeploy. Confirm chain id 8453 before you look for the balance. Keep the destination gas token or the arrival cannot move.
Is there an approval on the Solana USDT?
No. Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB is an SPL mint. Phantom signs it and Solscan records it. Keep native SOL for the fee. The WETH arrives in an EVM wallet that also needs ETH. There is nothing to revoke on Solana. The quote minimum is the floor, and a thin floor is a reason to stop.
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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