Cross-chain · Ethereum → Polygon

Swap DAI from Ethereum to WETH on Polygon

Swap DAI from Ethereum to WETH on Polygon. A trader moving Maker DAI into wrapped ETH on chain 137 receives Polygon WETH.

DAI is not a wrapper around ETH. You spend 0x6B175474E89094C44Da98b954EedeAC495271d0F on Etherscan. You receive 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygonscan. That WETH is not the mainnet contract 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, and withdrawing from the mainnet contract is not this route. Chain id 1 gas is ETH. Chain id 137 gas is POL. Switch to chain id 137 before you search for the wrapped ETH. The mainnet WETH row on Etherscan does not move when this pair completes, so the network badge matters as much as the ticker.

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

Polygon WETH is an ERC-20 on Polygonscan

Search 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 and confirm the contract before you treat the balance as spendable ETH. It will not pay POL fees. It will not show as native ETH on Ethereum. The wallet has to be on chain id 137, where blocks are about 2 seconds.

Buying WETH with DAI on mainnet stays home

This route is the wrong tool if you want 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 or native ETH on chain id 1. Those markets are already on Ethereum. Ethereum is only the network that holds the DAI at the start. Bridge when the WETH address you were given is the Polygon one.

The DAI you approve

Only 0x6B175474E89094C44Da98b954EedeAC495271d0F. Maker DAI uses 18 decimals, and so does Polygon WETH, which can make the unit count look familiar while the asset changes from a dollar to wrapped ETH. You still need ETH in the Ethereum account so the approval can be mined.

POL has to be waiting

Plan a small POL balance on the receiving address. Polygon WETH cannot sponsor its own first transfer. Until POL is present, the token can be visible on Polygonscan and still be stuck. Mainnet blocks, about 12 seconds, only cover the send.

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 DAI from Ethereum to WETH on Polygon?

DAI is not a wrapper around ETH. You spend 0x6B175474E89094C44Da98b954EedeAC495271d0F on Etherscan.

Is this how I unwrap DAI into ETH?

DAI is not wrapped ETH, so there is nothing to unwrap. Selling DAI for WETH on Ethereum credits 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. This route credits 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygon. Use it when chain 137 WETH is the position. Skip it when you want ETH exposure to stay on mainnet.

Which explorers do I check?

Etherscan for the DAI spend at 0x6B175474E89094C44Da98b954EedeAC495271d0F. Polygonscan for the WETH credit at 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. Native ETH would use the 0xEeee placeholder and is not the output. If your native ETH line on Ethereum grew, you did a different trade. Then switch networks before you search.

What blocks the WETH after it arrives?

No POL. Chain id 137 charges POL for every transfer, and Polygon WETH is an ERC-20. Add POL before the next signature. You also needed ETH on chain id 1 to spend the DAI. The route delivers neither of those gas coins.

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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