Interface InvoiceMessage

interface InvoiceMessage {
    type: "INVOIC";
    invoiceNumber: string;
    invoiceDate: Date;
    orderNumber?: string;
    seller: Party;
    buyer: Party;
    currency: string;
    paymentTerms?: string;
    dueDate?: Date;
    lines: InvoiceLine[];
    totals: { subtotal: number; taxAmount: number; totalAmount: number };
}