Contains information about an invoice payment form.
invoice Full information of the invoice .
url Payment form URL .
paymentsProvider Contains information about the payment provider, if available, to support it natively without the need for opening the URL; may be null.
savedOrderInfo Saved server-side order information; may be null .
savedCredentials Contains information about saved card credentials; may be null .
canSaveCredentials True, if the user can choose to save credentials .
needPassword True, if the user will be able to save credentials protected by a password they set up