Cross-chain · Base → Ethereum

Swap WETH from Base to DAI on Ethereum

Swap WETH from Base to DAI on Ethereum. Wrapped ETH leaves Base, and Maker DAI is what you receive on Ethereum.

Spend 0x4200000000000000000000000000000000000006 on Base, chain 8453, and check that token on Basescan. Receive 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum, chain 1, and check it on Etherscan. Blocks there are about 12 seconds. DAI is Maker's token and uses 18 decimals, the same width as WETH and a different price. USDC and USDT on Ethereum use 6 decimals, so a raw unit comparison with those dollars will mislead you. Native gas is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, and it is not the token you are buying.

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

Same decimal width, different asset

Both WETH and DAI use 18 decimals, so the integers in an event log can look cousin to each other. They are not. One wrapped ether is not one DAI. Read the human amounts on the quote. DAI holds a peg by Maker's system. It is not a claim you redeem at Circle, and it is not Tether. A policy that only allows fiat-issued stables should stop on this page.

The wrapper has to be spendable first

If your ether on Base is still the gas coin, wrap it into 0x4200000000000000000000000000000000000006 before this route can see it. After it is wrapped, the router needs an allowance. Rejecting the allowance stops the trade cleanly. There is no partial burn of WETH from a signature you declined.

Where this route wastes the hop

It wastes the hop if the DAI market you want is already on Base. It is the wrong token if the counterparty wrote USDC or USDT. It is the wrong shape if they wrote native ETH or canonical WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. It is also the wrong mental model if someone called the destination bitcoin. WBTC is not native bitcoin, and this quote does not deliver WBTC.

Follow-through on mainnet

The signing order is covered in how to bridge assets between chains. Afterward you still need ETH on Ethereum to move DAI, because DAI is not gas. Basescan will not display the DAI credit. Etherscan will. Leave the quote if the minimum DAI, given the ETH price, is a discount you will not take. No fill time is offered here.

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 Base to DAI on Ethereum?

Why do WETH and DAI logs look numerically similar?

Both tokens use 18 decimals, so a transfer of 1 unit is 10 to the 18th in base units for each. The prices are unrelated. One WETH is not one DAI. Read the wallet amount, then confirm the contract on Etherscan is 0x6B175474E89094C44Da98b954EedeAC495271d0F and not a 6 decimal stable by mistake.

Is DAI the same kind of dollar as USDC?

No. USDC is Circle and uses 6 decimals. DAI is Maker and uses 18 decimals. Tether is a third issuer. If the instruction names Circle or Tether, this arrival will not match it. The source token is Base WETH, not Base USDC, so you are also selling ether exposure.

What pays gas after the DAI arrives?

ETH on Ethereum, chain 1. DAI cannot pay it, and the ETH you hold on Base, chain 8453, is a separate balance. Blocks on Ethereum are about 12 seconds once you have that gas coin. The bridge wait before the DAI shows on Etherscan is not the same figure and is not promised.

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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