Function GET

Returns Promise<
    | NextResponse<{ error: string }>
    | NextResponse<
        {
            currency: { code: string; id: string; symbol: string }
            | null;
            invoice:
                | {
                    client: { code: string; id: string; name: string };
                    clientId: string;
                    currency: { code: string; id: string; symbol: string } | null;
                    id: string;
                    number: string;
                    paidAmount: number;
                    remainingAmount: number;
                    status: InvoiceStatus;
                    totalAmount: number;
                }
                | null;
        } & {},
    >,
>