underlying asset is ETH. Under the hood, it uses WETH in the option contract. mint, unmint, and withdraw can be used the same way as described on PodPut, but instead of receiving an ERC20 as payment, msg.sender could receive ETH instead. The only function with different signature will be exerciseEthamountOfOptions units of the underlying asset for theamountOfOptions * strike price units of the strike token. Unlike the exercise used on PodPut, the caller should send ETH in the ratio of 1:1 withamountOfOptions. The contract will check if the msg.value is equal to the amountOfOptions. Otherwise, the transaction will revert.amountOfOptions * strikePrice units of strike asset are transferred to the calleramountOfOptions option tokens are burned.expirationWindow period, depending on the exercise type.