Additional fields passed through untyped.
Billed amount (decimal-string amount + currency).
OptionalcustomerPayer email, when set on create.
OptionaldescriptionDescription, when set.
OptionalkindWhich manager owns it: a billed invoice or a shareable checkout link.
Display merchant name.
Your order/reference.
Current InvoiceStatus.
Public /pay/<token> link id.
OptionaltxOn-chain transaction id once paid, when available.
A checkout/invoice record as returned by list/get/update.
nullon a patch field clears it; omit a field on update to leave it unchanged. Extra fields may be present.