An invoice
inputInvoiceMessage#c5b56859 peer:InputPeer msg_id:int = InputInvoice;
inputInvoiceSlug#c326caef slug:string = InputInvoice;
inputInvoicePremiumGiftCode#98986c0d purpose:InputStorePaymentPurpose option:PremiumGiftCodeOption = InputInvoice;
inputInvoiceStars#65f00ce3 purpose:InputStorePaymentPurpose = InputInvoice;