import { Payhere } from './Payhere';
import { Customer } from './utils/Customer';
import { PreapprovalParams } from './params/PreapprovalParams';
export declare class PayherePreapproval extends Payhere {
    private _preappObj;
    private _customerData;
    private onApprovalError;
    constructor(customer: Customer, preappObj: PreapprovalParams, onApprovalError: (errorMsg: string) => void);
    start(): Promise<void>;
}