# List to earn

### Listing option offer (gas-free action)

So you couldn't find the option contract with suitable condition, you can create an offer with specific **Strike Price,** **Premium** and **Duration**.

You will only need to pay the gas to approve the WETH spending once, after that you can list without paying any gas.

<figure><img src="https://4270498499-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL9kebcR5NupCd7ACbewW%2Fuploads%2FKZDRVTTfEvmox2BNdedl%2FScreen%20Shot%202022-10-14%20at%201.34.26%20AM.png?alt=media&#x26;token=23f260e8-1b96-4247-a3a6-2f7dab2f437d" alt=""><figcaption><p>you can create an offer with specific <strong>Strike Price,</strong> <strong>Premium</strong> and <strong>Duration</strong>.</p></figcaption></figure>

In order to submit an offer, you will be required to sign the message with the offer parameters. You will also need to set an expiry date of your offer.

### List to earn rules

**For call option offer**

*`premium + strike price - floor price = call option reward coefficient`*

the smaller the reward coefficient, the more the reward you will get overtime.

**For put option offer**

*`floor price - premium + strike price = put option reward coefficient`*

the smaller the reward coefficient, the more the reward you will get overtime.