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I need Weth for my dapp. So I looked at how AirSwap converts ETH to Weth. On the Rinkeby testnet, AirSwap calls this contract and uses the "deposit" function. I see from the code how this would work. Also I can see that this contract is owned by 0x.

My question is: Can I just call that exact contract for my Dapp too? Is this the recommended way to exchange Weth for Eth?

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You should use 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2.

A while ago, Will Warren (CEO of 0x) made a call for people to use a canonical WETH contract. Since then, nearly all Dapps have used this.

You will even see your Rinkeby WETH address in that article.

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