Cross-chain · Ethereum → Polygon

Swap DAI from Ethereum to USDC on Polygon

Swap DAI from Ethereum to USDC on Polygon. Holders leaving Maker DAI for Circle's dollar on chain 137 spend DAI and receive native USDC.

DAI is Maker's collateral dollar at 0x6B175474E89094C44Da98b954EedeAC495271d0F on Etherscan, 18 decimals. The USDC you receive is 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 on Polygonscan, Circle's native USDC, 6 decimals. Bridged USDC.e at 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 is not the receipt. You pay ETH on chain id 1. You later pay POL on chain id 137. Import the native contract from Polygonscan before you deposit. A wallet showing only USDC.e will look empty even after the route completes and the chain id is already 137. The 6 decimal display is another reason to read the token page before you size a transfer.

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

Watch the native USDC, not USDC.e

Polygonscan should show 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359. If you imported only 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174, the wallet will look empty. The decimals also change, from 18 on Maker DAI to 6 on Circle's native USDC. Read both token pages before you size the next transfer.

Maker DAI is the approval

The contract that decreases is 0x6B175474E89094C44Da98b954EedeAC495271d0F. Confirm it on Etherscan. Circle USDC on Ethereum, 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, is what you would receive from a mainnet DAI to USDC swap, and this route does not pay that contract.

Keep the Maker dollar on Ethereum when that is the job

This route is the wrong tool if you want Circle USDC on chain id 1, or if you want to remain in DAI. Both of those are mainnet actions. Bridge when a Polygon app has whitelisted the native USDC. Polygon is where POL then pays for using it.

Gas on both sides of the decimal change

ETH pays the Ethereum approval. Blocks there are about 12 seconds. POL pays any later move of the USDC. Blocks on chain 137 are about 2 seconds. The USDC cannot sponsor that second fee. Hold POL before you try to deposit the new dollars.

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 USDC on Polygon?

DAI is Maker's collateral dollar at 0x6B175474E89094C44Da98b954EedeAC495271d0F on Etherscan, 18 decimals. The USDC you receive is 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 on Polygonscan, Circle's native USDC, 6 decimals.

Does this give me Circle USDC on Ethereum?

No. It spends Maker DAI and pays Circle's native USDC on Polygon, 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 on Polygonscan. Ethereum Circle USDC remains 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Etherscan. If that mainnet contract is the balance you wanted, trade DAI for it on chain id 1 and skip this bridge.

Why might the USDC amount look different from the DAI amount?

DAI uses 18 decimals and Polygon native USDC uses 6. A wallet with the wrong decimal field will shift the display by many zeros even when the quote was a dollar-for-dollar shape. Check the decimals on Polygonscan for 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359. The quote you sign is the figure to trust, and this page does not set it.

What if the app listed USDC.e?

Stop and do not deposit this output there. USDC.e is 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174. This route pays the native contract. Sending native USDC into a pool that wants the bridged token will not credit your position. Match the allowlist address, not the USDC ticker.

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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