import { EventFormatter } from "../util";
import { Channel } from "./channel";
import type { EchoOptionsWithDefaults } from "../connector";
import type { BroadcastDriver } from "../echo";
/** Structural interface that avoids a runtime channel/connector import cycle. */
export interface MercureWhisperPublisher {
    whisper(channel: string, event: string, data: unknown): void;
    listenForWhispers(channel: string): void;
}
/** A Mercure channel. */
export declare class MercureChannel extends Channel {
    /** The channel name. */
    name: string;
    /** The event formatter. */
    eventFormatter: EventFormatter;
    /** Event callbacks keyed by wire event name. */
    private listeners;
    /** Subscription callbacks. */
    private subscribedCallbacks;
    /** Error callbacks. */
    private errorCallbacks;
    /** The connector used to publish whispers. */
    protected whisperer?: MercureWhisperPublisher;
    /** Create a channel. */
    constructor(name: string, options: EchoOptionsWithDefaults<BroadcastDriver>, whisperer?: MercureWhisperPublisher);
    /** Listen for an event. */
    listen(event: string, callback: CallableFunction): this;
    /** Stop listening for an event. */
    stopListening(event: string, callback?: CallableFunction): this;
    /** Register a subscription callback. */
    subscribed(callback: CallableFunction): this;
    /** Register an error callback. */
    error(callback: CallableFunction): this;
    /** Public channels cannot scope whisper grants to authorized members. */
    whisper(_eventName: string, _data: Record<any, any>): this;
    /** Warn when registering a whisper listener that cannot receive events. */
    listenForWhisper(event: string, callback: CallableFunction): this;
    /** Dispatch an incoming event. */
    dispatch(event: string, payload: unknown): void;
    /** Notify subscription callbacks. */
    notifySubscribed(): void;
    /** Notify error callbacks. */
    notifyError(error: unknown): void;
}