You can earn staking rewards from your WMT that you purchased on the exchange by sending them to your Cardano wallet and verifying the wallet in the vault.

The wallet verification, or proof of ownership, is a small transaction of a certain amount of ADA that is provided in the vault (a different amount for each one that you and only you would know).

In order to do this you will need access to:

1. Your WMT vault.
2. Your Cardano wallet, where your WMT are located (not an exchange wallet).

Inside your vault, you should have a wallet address section like below for staking (which is separate to EarthNode reservations). If you already have a pending wallet for staking, please click the trash can on the right-hand side can to delete this, leaving you with a fresh field to verify your WMT address. Please note: if you click the trash button on an address you are already using for staking you will lose the staking slot and rewards.

In order to verify your wallet, you need to enter a new address from the wallet that you have your WMTs in. For example, go to your wallet and go to the Receive tab. Find an unused address where there is no ADA balance (0 ADA). Then copy/paste this fresh address to the wallet address field in your vault. e.g. screenshot above.

You will then see a very specific amount of ADA to transfer to this wallet address you added in the vault, usually between 1.5-1.7ADA.  

Please take into account any fees that might change the total amount of ADA sent - the exact total amount shown in the vault needs to be in the destination address.

Then go to the "Send" tab, then copy/paste the Wallet address you entered into the Vault into the "Receiver" field. Then enter the exact amount of ADA into the "Amount" field. Make sure you do not send all tokens. Then after a short while, your wallet will be verified in the Vault, then you will be able to participate in future staking or Earth Node reservations.