Additional fields passed through untyped.
OptionalcheckoutFull hosted checkout URL (when a checkout base URL is configured).
OptionalexpiresExpiry as epoch milliseconds, when set.
OptionalpayRelative /pay/<token> path (when no base URL is configured).
Current InvoiceStatus of the link.
Opaque link token — used in the hosted /pay/<token> URL and to Checkouts.get it.
A created hosted checkout link — the page to send the payer to. Extra fields may be present.