export declare class PaymentRequest {
    requestTime: number;
    version: string;
    nonceStr: string;
    constructor(requestTime: number, version: string, nonceStr: string);
    toJSON(): object;
}
export declare class BuildPayload {
    private requestTime;
    private version;
    private nonceStr;
    constructor(requestTime: number, version: string, nonceStr: string);
    build(): PaymentRequest;
}