import type { PeerId } from '@libp2p/interface-peer-id';
import type { Components } from '@libp2p/interfaces/components';
import type { SendMessage } from '../index.js';
import { HeartbeatConfig, Network, Pinger } from '../../lib/core_network.js';
export default class Heartbeat {
    protected networkPeers: Network;
    private libp2pComponents;
    protected sendMessage: SendMessage;
    private stopHeartbeatInterval;
    private protocolHeartbeat;
    protected config: HeartbeatConfig;
    protected pinger: Pinger;
    constructor(networkPeers: Network, // protected for testing
    libp2pComponents: Components, sendMessage: SendMessage, environmentId: string, config: HeartbeatConfig);
    private errHandler;
    start(): Promise<void>;
    stop(): void;
    /**
     * Attempts to ping another peer.
     * @param destination id of the node to ping
     * @returns a Promise of a pingResult object with property `lastSeen < 0` if there were a timeout
     */
    pingNode(destination: PeerId): Promise<void>;
    /**
     * Starts the periodic check
     */
    private startHeartbeatInterval;
}
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