5. Velocity POP Payment Workflow

The following sequence diagram provides the POP payment options, which includes the following:

• The Common Payment Initiation Flow
• The Fetch Exchange Rates Flow for New Cards
• The New Card Authorization Flow
• The New Card Authorization Flow with Agreement to Store Card
• The Fetch Exchange Rates Flow for Stored Card
• The Authorization Flow for Using Stored Card
• The Authorization Flow for Card Stored in Third-party Wallet
• The Settlement with Acquirer Flow
• The 3DS Authorization Flow
• The Payment Flow with APM

The payment processing workflow of the Velocity POP is as follows:

1. The merchant application authorizes a payment using the APIs.
2. The backend of the Velocity POP completes the payment authorization and returns the status.
3. The APIs provide the status to the frontend of the merchant application, which processes the payment through PSS, based on the payment status.