Cross-chain · Arbitrum One → Polygon

Swap WETH from Arbitrum One to USDT on Polygon

Swap WETH from Arbitrum One to USDT on Polygon. Arbitrum WETH leaves the wallet and Polygon USDT arrives on Polygon.

The spend contract is 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. Arbiscan, chain id 42161, not Nova. Fee in native ETH. The receive contract is Tether at 0xc2132D05D31c914a87C6611C10748AEb04B58e8F, six decimals. Polygonscan is the check. It is not Circle USDC and not the POL sentinel. Chain id 137. Blocks about every 2 seconds. That pace belongs to Polygon, not to the route.

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

Match Tether, not a generic dollar row

Polygon wallets stack USDT, native USDC, and USDC.e in one list. This quote can credit only 0xc2132D05D31c914a87C6611C10748AEb04B58e8F. If you tell a payer you are holding Circle, you will be describing the wrong issuer. Six decimals make the amount look like Ethereum USDT, but the address is not 0xdAC17F958D2ee523a2206206994597C13D831ec7 and the chain is not Ethereum.

WETH allowance is the permission

Approve 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 on Arbitrum One if asked. Pay with ETH. Do not approve USDT on Polygon in order to receive it. If the approval screen shows the gas sentinel, go back and select WETH. A Nova session will not line up with Arbiscan's One contract.

Sale first, gas second

The minimum USDT is the sale price of wrapped ether. It moves. Refresh it. Afterward, POL is what spends that USDT. How cross-chain bridges work does not add POL to a route that selected Tether. A MATIC label is still the native fee token of chain id 137.

Wrong inputs and wrong outputs

Unwrapped ETH is the wrong input. Circle's 0x3c499c contract is the wrong output. USDC.e is the wrong output. Polygon WETH and POL are wrong outputs if you wanted dollars. Keeping Arbitrum WETH and only changing chains without selling is a different intent this page does not serve. Before you sign, compare 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 with 0xc2132D05D31c914a87C6611C10748AEb04B58e8F on their explorers and stop if either address on the quote differs. A stale minimum is a reason to ask for a fresh quote rather than signing the old one. Sign only on the source chain id named in this article, with the wallet network checked.

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 Arbitrum One to USDT on Polygon?

The spend contract is 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. Arbiscan, chain id 42161, not Nova. XAUConnect compares live routes and lets your own wallet sign.

Which USDT address arrives on Polygon?

0xc2132D05D31c914a87C6611C10748AEb04B58e8F. It is Tether, six decimals. Check Polygonscan. You spend WETH at 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 on Arbitrum One. Circle USDC at 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 is not the credit. Neither is Arbitrum Tether. Confirm that address on the explorer before you sign, and refresh the quote if it has expired.

Does WETH on Arbitrum pay the Polygon fee?

No. Source gas is native ETH on chain id 42161. Destination gas is POL on chain id 137, and this route does not deliver it. The sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE means a different coin on each chain. USDT cannot substitute. About 2 seconds is a block time, not a fee.

What if my balance is native ETH, not WETH?

This page will not sell it. The contract is 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. Use the native ETH route, or wrap first and still keep ETH for gas. Confirm the network is Arbitrum One, not Nova, before you approve. The receive asset remains Polygon USDT either way only if you are on the matching route.

Live execution

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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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