2.1. Async-Response

@startuml participant cp as "Connecting Party" participant paynet as "SBC" ==Request Initiation== cp -> paynet: API Request activate cp activate paynet paynet --> cp: Order ID deactivate cp deactivate paynet ==Order Status Request== cp -> paynet: api/v2/status activate cp activate paynet paynet --> cp: Response\nstatus, order-stage deactivate cp deactivate paynet ==Receive Merchant Callback== paynet -> cp: callback with final status activate cp activate paynet cp --> paynet: HTTP 200 deactivate cp deactivate paynet @enduml

All SBC responses are asynchronous, regardless of the request or callback sent.