/**
 * Android hardware-back auto-tracker. Subscribes to RN's
 * `BackHandler` and emits BUTTON_CLICK("Android Device Back Button")
 * per press. The subscription returns `false` so the default back
 * navigation still runs - the tracker is observe-only.
 *
 * No-op on iOS / web: the platform check inside `attach()` returns
 * a no-op detach when `Platform.OS !== 'android'`, so the SDK boot
 * does not crash on the wrong host.
 */
import type { KeewanoTracker } from '../types/config';
import type { BackHandlerTrackerArgs } from './types/BackHandlerTracker';
declare class BackHandlerTracker implements KeewanoTracker {
    readonly name = "BackHandlerTracker";
    private readonly args;
    constructor(args: BackHandlerTrackerArgs);
    /**
     * Subscribe to hardware-back events when running on Android.
     * Returns a no-op detach on iOS / web or when the BackHandler
     * module is absent.
     */
    attach(): () => void;
}
export type { BackHandlerTrackerArgs } from './types/BackHandlerTracker';
export { BackHandlerTracker };