Support Multitender Flows for In-Store Pay by Link

The in-store pay by link workflow now supports multitender scenarios. The workflow also verifies that the entire order amount is paid before returning an approved status to store associates. The system now validates that the sum of all payments equals the full order total before finalizing the sale. Previously, the POS app incorrectly treated a partial payment as a completed transaction and immediately showed the confirmation page.

Where: This change applies to Point of Sale.