import { InvoiceAllowance, InvoiceAllowanceState } from '@rytass/invoice';
import { ECPayInvoice } from './ecpay-invoice';
import { ECPayPaymentItem } from './typings';
export declare class ECPayInvoiceAllowance implements InvoiceAllowance<ECPayPaymentItem> {
    readonly allowanceNumber: string;
    readonly allowancePrice: number;
    readonly allowancedOn: Date;
    readonly remainingAmount: number;
    readonly items: ECPayPaymentItem[];
    readonly parentInvoice: ECPayInvoice;
    status: InvoiceAllowanceState;
    invalidOn: Date | null;
    constructor(options: Omit<InvoiceAllowance<ECPayPaymentItem>, 'invalidOn' | 'invalid'> & {
        parentInvoice: ECPayInvoice;
    });
    invalid(invalidOn?: Date): void;
}