The Payment Service Listener v3 API must be implemented by merchants and hosted under a certain URL that is configured in PXP Financial Payment Service. E.g. the merchant may decide to publish his implementation under
https://www.merchant.com/kalixa-payment-service-listener-v3
Method name appended to URL
By default PXP Financial will send requests to the above url after appending
/{method_name}at the end, e.g.:
https://www.merchant.com/pxp-financial-payment-service-listener-v3/handlePaymentStateChangedNotification