Interface Invoice

interface Invoice {
    amount_due: number;
    amount_paid: number;
    billing_address?: string;
    billing_city?: string;
    billing_company?: string;
    billing_country?: string;
    billing_email?: string;
    billing_name?: string;
    billing_state?: string;
    billing_vat_number?: string;
    billing_zipcode?: string;
    created_at: string;
    currency: string;
    description: string;
    discount: number;
    due_date: null | string;
    external_reference?: string;
    invoice_number: string;
    line_items?: InvoiceLineItem[];
    metadata?: Record<string, unknown>;
    notes?: string;
    paid_at: null | string;
    payment_method: string;
    payment_provider: string;
    payment_reference: string;
    period_end: null | string;
    period_start: null | string;
    project_uuid: string;
    ref_no: string;
    status: InvoiceStatus;
    subscription_uuids?: string[];
    subtotal: number;
    tax_amount: number;
    tax_rate: number;
    total: number;
    transaction_id: string;
    updated_at: string;
    uuid: string;
    [key: string]: unknown;
}