The Cardstream payment option lets customers pay you using a credit card or debit card. Cardstream offer their service through a number of partner gateways, and you can use any of these gateways to take payments.
Setting up Cardstream in your shop
You can set up Cardstream payment by clicking Configuration in the shop management panel menu, clicking Cardstream, and changing the following settings:
Whether Cardstream is available as a payment method.
Where the payment method is available — either one of the delivery regions set up in your shop or the special value Everywhere.
The Cardstream partner gateway you are using.
Your merchant ID. This will be supplied by Cardstream (or the Cardstream partner gateway you are using).
This is a secret value used to ensure the security of communications with Cardstream. This will be supplied by Cardstream (or the Cardstream partner gateway you are using).