What the card is charged, in US cents: the price plus 5% plus 30 cents.
Stripe's checkout page, where the buyer enters the card.
The id to check the payment with, as in pai payment <id>.
A code pai sends back in the x-phantom-recovery-code header when it checks the payment. With it, a new key can be fetched again later.
A card payment from POST /purchase/card with
hosted: true.