import { EventEmitter } from "node:events";
import type { IncomingMessage, ObjPath } from "./protocol.js";
export interface ConnectionConfig {
    host: string;
    port: number;
    retryIntervalMs?: number;
    requestTimeoutMs?: number;
    pingIntervalMs?: number;
}
export type RequestBody = {
    type: "set";
    obj: ObjPath;
    payload: unknown;
} | {
    type: "get";
    obj?: ObjPath;
} | {
    type: "cmd";
    payload: unknown;
};
export interface ConnectionEvents {
    connected: [];
    reconnected: [];
    disconnected: [];
    reconnecting: [];
    update: [unknown];
    error: [Error];
}
export declare class Connection extends EventEmitter<ConnectionEvents> {
    private readonly config;
    private readonly retryMs;
    private readonly reqTimeoutMs;
    private readonly pingMs;
    private socket?;
    private seq;
    private pending;
    private retryTimer?;
    private pingTimer?;
    private destroyed;
    private hasConnectedOnce;
    private firstConnectResolve?;
    constructor(config: ConnectionConfig);
    get connected(): boolean;
    start(): Promise<void>;
    private openSocket;
    private onDrop;
    private scheduleRetry;
    private startPing;
    private stopPing;
    private onMessage;
    request(body: RequestBody): Promise<IncomingMessage>;
    private failAllPending;
    destroy(): Promise<void>;
}