To take a payment for a new subscription or purchase, you will need to define the element(s). An element is the Stripe products (sometimes referred to as items in Loop) the customer is purchasing. Elements are defined by using either Stripe’s price-id or Loop’s internal item-id. You can combine multiple items in one payment link.
In Stripe, price-ids can be found under Product Catalogue -> Products -> Price, in the top right corner. They started with price_
When combining multiple products with recurring payment terms, the combination of products must follow Stripe rules for a valid subscription. Thus, the products must have the same payment frequency (e.g. monthly payments). Products that take a one-time payment can be combined with any frequency.
To take a payment for an existing Stripe customer, pass in the externalCustomerId along with the elements.
The externalCustomerId looks like cus_SEQNcTSJ7jSktU. This id can be found by clicking on the specific customer you want to charge, under details.
