Migrate flutterwave payments to rails

Feature description

This is on end of engineering, we want to migrate our payment link generation to the backend by making use of standard API of flutterwave, this way we can easily manage the API however we like.

Figma Design link

N/A

Use cases

As an engineer, I need the FW Calls to be on the backend

Benefits (For whom and why.)

Better security

Person who should verify on Staging

@saurabh44 @olivierjmm

Requirements (checklist preferred)

Engineer checklist:

• migrate flutterwave calls to the backend
• flutterwave payment link should be sent from backend to the frontend
• after payment is made it should route back and save data to transaction log table

Verification by another Engineer:

• migrate flutterwave calls to the backend
• flutterwave payment link should be sent from backend to the frontend
• after payment is made it should route back and save data to transaction log table

Engineering Notes:

• an example of nodejs flow is here but it is much similar to the ruby sdk https://developer.flutterwave.com/docs/collecting-payments/standard
• ruby sdk https://github.com/Flutterwave/Flutterwave-Ruby-v3