Cross-chain · Ethereum → Polygon

Swap WBTC from Ethereum to WETH on Polygon

Swap WBTC from Ethereum to WETH on Polygon. Traders moving wrapped bitcoin into wrapped ETH on chain 137 receive Polygon WETH.

You spend WBTC at 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 on Etherscan, an 8 decimal ERC-20. You receive 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygonscan. That is not mainnet WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, and it is not bitcoin. Chain id 1 gas is ETH, about 12 seconds a block. Chain id 137 gas is POL, about 2 seconds a block. The Polygon WETH shows up only after the wallet leaves Ethereum. Etherscan's WETH balance does not record this route, so a mainnet watch will look unchanged.

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

Two wrappers on two chains

Selling WBTC for WETH on Ethereum would leave you in 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. This route leaves you in Polygon WETH. It is the wrong tool for a Bitcoin-network withdrawal and the wrong tool for a mainnet WETH balance. Use it when the ETH book you want is on chain 137.

Check Polygon WETH, not the native line

Polygonscan must show 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. The WBTC that decreases is 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 on Etherscan. Native ETH would have been the 0xEeee placeholder, and it is not the output. If your Ethereum ETH balance is what you wanted to grow, you opened the wrong pair.

Gas that neither wrapper can pay

WBTC will not pay the Ethereum approval. Hold ETH on chain id 1. Polygon WETH will not pay the chain 137 transfer. Hold POL. Ethereum is only the starting side. The quote you sign is the amount you accept. This article does not publish a price.

When the source-chain pool is the better book

Someone who wants to rotate WBTC into WETH without leaving Ethereum should stay on chain id 1, where both contracts already trade. The pool being on the source chain is the reason to skip the bridge. This pair is for a desk that needs the Polygonscan WETH specifically.

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 WBTC from Ethereum to WETH on Polygon?

You spend WBTC at 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 on Etherscan, an 8 decimal ERC-20. You receive 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygonscan.

Is the WETH I receive the Ethereum WETH contract?

No. Ethereum WETH is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 on Etherscan. This route pays 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygonscan. Native ETH is the gas coin on chain id 1. Three different things use the ETH name. The contract you can spend on Polygon is the Polygon one.

Can this WBTC go to a Bitcoin address instead?

Not on this route. WBTC at 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 is an ERC-20 on Ethereum. The output is an ERC-20 on Polygon. Neither explorer is a Bitcoin explorer. If you need bitcoin on the Bitcoin chain, this pair is the wrong tool. This pair cannot do that job.

What fails if the wallet holds only WBTC?

The Ethereum transaction. Chain id 1 charges ETH, and WBTC cannot substitute. Add ETH before you approve 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599. On the far side, add POL or the Polygon WETH will be unable to move. Blocks are about 12 seconds on Ethereum and about 2 seconds on Polygon.

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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