Add "payment" sub-resource to incoming payment

[adrianhopebailie]

It would be very useful to send information from the sending ASE to the receiving ASE after each payment toward an incoming payment, especially if the incoming payment has no amount (e.g. Web Monetization).

Proposal

The sending wallet can POST a new "payment" resource to the incoming-payment which adds a sub-resource that represents some money was sent to the incoming payment.

Possible properties of the resource:

• amount sent
• sender
• meta

[mkurapov]

I'm guessing this would be an attribute that is a list of "payments"? Since we can have multiple outgoing payments per incoming payment

(Dare I suggest we call this "receipts"...)