In this document, you’ll learn what a payment collection is and how the MedusaGo application uses it with the Cart Module.

What's a Payment Collection?#

A payment collection stores payment details related to a resource, such as a cart or an order. It’s represented by the PaymentCollection data model.

Every purchase or request for payment starts with a payment collection. The collection holds details necessary to complete the payment, including:

• The payment sessions that represent the payment amount to authorize.
• The payments that are created when a payment session is authorized. They can be captured and refunded.
• The payment providers that handle the processing of each payment session, including the authorization, capture, and refund.

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Multiple Payments#

The payment collection supports multiple payment sessions and payments.

You can use this to accept payments in increments or split payments across payment providers.

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Usage with the Cart Module#

The Cart Module provides cart management features. However, it doesn’t provide any features related to accepting payment.

During checkout, the MedusaGo application links a cart to a payment collection, which will be used for further payment processing. It also implements the payment flow during checkout.