3. Activate the plugin

Next, we’ll activate the plugin which can be done simply by going to Setup>Payments>Payment Gateway.

Then under All Payment Gateways, click on Blockonomics and your plugin is activated!

To paste this API key in WHMCS admin panel, go back to the Manage Existing Gateways tab and paste the API key under API key there. Then click Save.

4. Synchronize your wallet with Blockonomics

It’s time to connect your wallet, which stores all of your Bitcoin, to your WHMCS site.

You can either use your own wallet, or you can create a free one at Blockchain.info (which is what we will do in our examples below).

We’ll need to get the Extended Public Address, also known as the xPub. The key will act as your unique identifier that ensures your Bitcoin transactions land in your wallet. From there, you’ll be able to move your Bitcoins to another, more private, wallet, or convert them to real currency (or fiat currency).

After logging into your Blockchain.info account, click on Settings on the left sidebar (we’re seeing a common theme here, aren’t we?). Then click Addresses.

On the right side, click Manage. Then link will reveal a More Options button — after clicking it, lastly click Show xPub.

Your xPub key should be kept secret. Copy it to your clipboard.