# Transactions

- [Process Payment](/zapi/zapi-calls/interacting-with-a-cart/transactions/process-payment.md): Process Cart with Payment is used to create a new booking from the cart contents.
- [Process Single Transaction](/zapi/zapi-calls/interacting-with-a-cart/transactions/process-single-transaction.md): This method is used to create all transactions on open ZAPI cart objects (this includes refunds).
- [Apply Promo Code](/zapi/zapi-calls/interacting-with-a-cart/transactions/apply-promo-code.md)
- [Apply Gift Card](/zapi/zapi-calls/interacting-with-a-cart/transactions/apply-gift-card.md)