This endpoint opens a unidirectional channel with the payment information of the active session.

• The endpoint is accessible while the session is open, emitting the payment status at 1s intervals; if the payment is completed or fails, it stops emitting.
• Upon reaching a terminal state (completed, error), the channel stops emitting but is accessible with the data of
• The channel has a maximum timeout of 300s, after which it will close due to timeout; if the operation has not finished, the endpoint can be called again to resume communication.