Single Session with Pre-Selection

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Payment Flow

1. The Nayax Device sends a message to the consumer: “Please Select a Product.”
2. The consumer selects a product from the vending machine.
3. The peripheral’s SDK sends a vending request to the Nayax Device.
   C

   C#

   Java

   vmc_vend_vend_request(vend_session_t *session)
   
4. The Nayax Device sends a message to the consumer: “Please Present Card.”
5. The consumer presents their payment card.
6. The Nayax Device sends an authorization request to the Nayax Server.
7. The Nayax Server forwards the authorization request to the Billing Provider.
8. The Billing Provider sends an authorization response (approved) to the Nayax Server.
9. The Nayax Server sends the authorization response (approved) back to the Nayax Device.
10. The peripheral’s SDK handles transaction data received from the Nayax Device via the Transfer Data command (said data includes information about the Nayax transaction ID and the consumer’s card details):
    C

    C#

    Java

    vmc_vend_event_handler_cb(vm_vend_event_on_transaction_info)
    
11. The SDK triggers “Vend Approved” events:
    C

    C#

    Java

    vmc_vend_event_handler_cb(vm_vend_event_on_vend_approved)
    
12. The peripheral dispenses the product/ provides the service to the consumer.
13. The SDK reports “vend success”:
    C

    C#

    Java

    vmc_vend_vend_status(&session, __true)
    
    And completes the vend session:
    C

    C#

    Java

    vmc_vend_vend_session_complete_lowlevel()
    
14. Message to the consumer: “Please Take Product.”
15. The Nayax Device sends a settlement request to the Nayax Server.
16. The Nayax Server forwards the settlement request to the Billing Provider.
17. The Billing Provider sends a settlement response (OK) to the Nayax Server.
18. The Nayax Server returns the settlement response (OK) to the Nayax Device.

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See Also