Spent amount returned in payment tx response (Version: 2.6.2)

[shortthefomo]

Motivation

When using the tfPartialPayment flag on payments the transaction result does return how much was delivered via delivered_amount. However it does not provide a simple way to know how much was spent, as inherently sometimes only a partial amount of the SendMax value is spent. One has to parse the meta data of the transaction to figure this out.

Solution

payment transaction responses should include a spent_amount field next to the delivered_amount