Cross-chain · Polygon → Ethereum

Swap WETH from Polygon to USDT on Ethereum

Swap WETH from Polygon to USDT on Ethereum. Polygon WETH leaves that chain. Tether USDT is what can arrive on Ethereum. You are not delivering Ethereum WETH, and you are not staying in ether.

Sell 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. Buy 0xdAC17F958D2ee523a2206206994597C13D831ec7, Tether on chain id 1, 6 decimals. Polygonscan records the WETH. Etherscan records Tether. POL is required on the source. The bridge steps that people skip are in how to bridge assets between chains.

Diagram for Swap WETH from Polygon to USDT on Ethereum
WETH leaves Polygon. USDT is what can arrive on Ethereum.

Tether here is the Ethereum contract

0xdAC17F958D2ee523a2206206994597C13D831ec7 is not Polygon USDT at 0xc2132D05D31c914a87C6611C10748AEb04B58e8F. If you wanted Polygon Tether, you never needed this hop. If you wanted Circle USDC, the contract is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and this route is wrong.

WETH will not pay Polygon

Approving 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 spends a token allowance, and the network fee is still POL. Chain id 137 blocks in about 2 seconds. Leave POL. A wallet that holds only WETH cannot send this route.

USDT will not pay Ethereum

After arrival you hold Tether, not ETH. Chain id 1 charges ETH, with blocks around 12 seconds. That block is not the bridge clock. Fund ETH on the destination or the USDT waits. ETH is not WETH, and this output is neither.

Local unwrap is the wrong mental model

There is no native ETH inside Polygon to unwrap into. Selling WETH for USDT on Ethereum is a cross-chain trade. Etherscan will not show the Polygon WETH contract as the credit. Match both full addresses.

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 Polygon to USDT on Ethereum?

Sell 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. Buy 0xdAC17F958D2ee523a2206206994597C13D831ec7, Tether on chain id 1, 6 decimals. XAUConnect compares live routes and lets your own wallet sign.

Is 0xdAC17 the token I am selling?

No. You sell Polygon WETH at 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. 0xdAC17F958D2ee523a2206206994597C13D831ec7 is the Tether you can receive on Ethereum. Polygonscan shows the first. Etherscan shows the second. Approving Ethereum USDT does not move the WETH. Stay on chain id 137 and approve only the Polygon WETH contract before anything else.

Why is my Ethereum WETH balance unchanged?

Because this quote does not buy 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. ETH is not WETH, and the output is Tether anyway. If you needed mainnet WETH, stop. The credit to look for on Etherscan is USDT, after POL has paid the Polygon fee. Mainnet WETH is a different contract on a different chain.

What happens if I spend my last POL?

The approval or the swap on chain id 137 fails before Etherscan has a credit to show. WETH cannot substitute for POL. Keep a remainder of the native coin, the 0xEeee label on Polygon. About 2 second blocks are not a promise about the bridge leg.

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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