/**
 * Canonical penpal channel names used by `@trackunit/iris-app-runtime-core`.
 *
 * External iris-app publishers building against `@trackunit/iris-app-runtime-core`
 * must pass one of these strings to `useSubscribeToHostChanges(methods, channel)`
 * so the child connection lines up with the host's `usePenpalIframe({ channel })`.
 *
 * The module-level singleton connector uses {@link Channels.HostRuntime}; the
 * remaining channels are dedicated to the five subscription providers
 * (token, time-range, filter bar, widget config, asset sorting).
 *
 * Channel strings outside this set are reserved for future use and should not
 * be passed to penpal `connect({ channel })` today.
 */
export declare const Channels: {
    readonly HostRuntime: "host-runtime";
    readonly TokenSubscription: "token-subscription";
    readonly TimeRangeSubscription: "time-range-subscription";
    readonly FilterBarSubscription: "filter-bar-subscription";
    readonly WidgetConfigSubscription: "widget-config-subscription";
    readonly AssetSortingSubscription: "asset-sorting-subscription";
};
/**
 * String-literal union of the canonical penpal channel names exported by
 * {@link Channels}.
 *
 * External iris-app publishers must pass a value of this type to
 * `useSubscribeToHostChanges(methods, channel)`; the module-level singleton
 * uses `Channels.HostRuntime`. Custom channel strings outside this set are
 * reserved for future use.
 */
export type Channel = (typeof Channels)[keyof typeof Channels];