The credit this payment buys, in USD.
When the payment request lapses, as an ISO 8601 time.
Optionalpay_The amount to pay, in that coin.
Optionalpay_The coin the payment is in, as the server records it (sol, usdcsol or usdtsol).
Where the payment stands, such as pending, completed, expired or failed. paymentStage puts it in words.
True once the credit is on the key the payment named.
The answer from GET /purchase/{id}/status.