This is to handle refunds, which are invoices with negative amounts,
that can be both issued or received (i.e., an “expense”).
The API provided by PostgreSQL is mostly the same, and internally it
deals with negatives, so the Go package only had to change selects of
collection.
I am using an htmx-infused button to remove the payment, but that
button can not have the CSRF token as value, thus i have to send it in a
header.
The removal of payments warrants a functions, instead of just DELETE
(and CASCADE) as i do for payment methods, because i have to adjust the
status of expenses too. Since i already have functions for everything,
it is not worth using triggers just for that.
jordi fita mas