import type { EmitterSubscription } from 'react-native';
export interface CastSessionEvent {
    connected: boolean;
    deviceName?: string;
    error?: string;
}
/**
 * Listen for Chromecast session state changes (connect/disconnect).
 * Emitted by the native module when Google Cast session starts, resumes, ends, or suspends.
 * Returns an EmitterSubscription — call .remove() to unsubscribe.
 *
 * @example
 * ```ts
 * const sub = addCastSessionListener((event) => {
 *   console.log(event.connected ? `Connected to ${event.deviceName}` : 'Disconnected');
 * });
 * // Later: sub.remove();
 * ```
 */
export declare function addCastSessionListener(callback: (event: CastSessionEvent) => void): EmitterSubscription;
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