import Consul from 'consul';
import * as urllib from 'urllib';
import * as grpc from '@grpc/grpc-js';
import type { ConsulOptions, RegisterOptions, Service } from './types';
export declare class ConsulBalancer {
    private options;
    private address;
    private serviceRegisterId;
    private cachedServices;
    private conculInstance;
    private static defaultOptions;
    constructor(port: number, host: string, options: ConsulOptions);
    constructor(port: number, options: ConsulOptions);
    constructor(port: number, host: string);
    constructor(options: ConsulOptions);
    constructor(port: number);
    constructor(host: string);
    constructor();
    getConsulInstance(): Consul.Consul;
    register(options?: RegisterOptions): Promise<never>;
    deregister(serviceId?: string): Promise<unknown>;
    /**
     * grpc load balancer
     * @param serviceName - name of the service | address:port
     * @param targe - grpc client instance target
     * @param method - grpc method name
     * @param data - grpc request data
     */
    grpc(serviceName: string, target: grpc.ServiceClientConstructor, method: string, data: unknown): Promise<unknown>;
    rest(serviceName: string, pathName: string, options?: urllib.RequestOptions2): Promise<urllib.HttpClientResponse<any>>;
    getPassingServiceByRandom(serviceName?: string): Promise<Service | null | undefined>;
    private getServiceListFromConsul;
    private parseOptions;
    private getServiceRegisterId;
    private findFirstNonLoopbackHostInfo;
}