This page provides the workflow for the FX Service through Dynamic Currency Conversion (DCC).

DCC Workflow

The following sequence diagram shows the FX Service workflow:

The workflow of DCC is as follows:

1. After Initialize Payment is successful, the merchant application shows the payment page.
   
   
2. The dccenabled flag in initialize-payment checks eligibility for invoking currency conversion flow for a card.
   
   
3. When a customer enters a card number or selects a stored card and the card type is eligible for DCC, the front-end application calls Velocity POP to get the exchange rates and other meta data related to the exchange rates.
   Note: DCC is applicable for Visa and Mastercard cards only.
   
   
4. The Velocity POP connects to the third-party FX provider and retrieves the exchange rates.
   
   
5. Depending on what option the customer selects, the merchant application sends the DCC opt-in/opt-out information to the Velocity POP back-end in Pay and Authorize Payment calls.
   
   
6. The back-end of the Velocity POP completes the payment authorization and returns the status.
   
   
7. The Velocity back-end informs the third-party FX provider of the transaction status.