KiA B2C Enterprise Customer has the following use case that involves processing payment from an external payment gateway service in Salesforce.

1. Customer requests Customer Service Representative (CSR) for a Service upgrade.

2. Customer provides credit card details to CSR for payment.

3. CSR submits payment information in Salesforce, and processed in a

4. CSR receives confirmation of payment.

5. CSR upgrades service for customer and confirms Customer.

external payment gateway.

This use case requires the CSR to obtain confirmation of payment before upgrading the service.

The integration with Payment gateway needs to be reliable and monitored for audit purposes.

The payment gateway service isan external RESTful service that the B2C Enterprise Customer has subscribed for.

What should an Integration Architect recommend for this integration?