import { ChannelCredentials } from "@grpc/grpc-js";
import { EndPoint, NodePreference, VNodeState } from "../types";
import type { DNSClusterOptions, GossipClusterOptions } from ".";
export interface MemberInfo {
    instanceId?: string;
    timeStamp: number;
    state: VNodeState;
    isAlive: boolean;
    httpEndpoint?: EndPoint;
}
export declare const discoverEndpoint: ({ discoveryInterval, maxDiscoverAttempts, gossipTimeout, nodePreference, ...settings }: DNSClusterOptions | GossipClusterOptions, credentials: ChannelCredentials, failedEndpoint?: EndPoint) => Promise<EndPoint>;
export declare const isInAllowedState: (member: MemberInfo) => boolean;
export declare const filterAndOrderMembers: (preference: NodePreference, members: MemberInfo[]) => MemberInfo[];
export declare const determineBestNode: (preference: NodePreference, members: MemberInfo[]) => EndPoint | undefined;
export declare const delay: (timeout: number) => Promise<void>;