incomingPayment attribute can be used to verify the receipt of a payment. Today, the
monetization event fires when the WM agent successfully creates an outgoing payment request at the WM provider. Since it’s only a request to send an outgoing payment, there’s no guarantee at this point that a payment has been received.
incomingPayment attribute returns the URL that represents the incoming payment at the WM receiver. The returned value is the value it was initialized with. By querying the URL, you can get the