/**
 * Connectivity auto-tracker. Subscribes to
 * `@react-native-community/netinfo` (when installed) and emits:
 *
 *   - INTERNET_CONNECTED    when `state.isConnected` flips to `true`.
 *   - INTERNET_DISCONNECTED when it flips to `false`.
 *
 * The tracker degrades gracefully to a no-op when NetInfo is not
 * installed - it is an optional peer dependency. Whether the host
 * sees an initial baseline event depends on the underlying NetInfo
 * implementation: `@react-native-community/netinfo` >= 6 fires the
 * listener once on subscribe with the current state, in which case
 * a boot-offline launch emits one `INTERNET_DISCONNECTED` baseline;
 * older NetInfo builds and custom mocks may not. The tracker does
 * not call `NetInfo.fetch()` itself - it would require widening the
 * minimal `NetInfoLike` contract and most realistic NetInfo builds
 * already deliver the baseline through `addEventListener`.
 *
 * `isConnected === null` (the "unknown" RN state) is treated as a
 * no-op so the tracker does not emit a misleading
 * `INTERNET_DISCONNECTED` for the brief window before the OS reports
 * a real value.
 */
import type { KeewanoTracker } from '../types/config';
import type { NetworkTrackerArgs } from './types/NetworkTracker';
declare class NetworkTracker implements KeewanoTracker {
    readonly name = "NetworkTracker";
    private readonly args;
    constructor(args: NetworkTrackerArgs);
    /**
     * Subscribe to NetInfo connectivity transitions. Returns a no-op
     * detach when NetInfo is absent or its `addEventListener` is not
     * a function (broken shim).
     */
    attach(): () => void;
}
export type { NetworkTrackerArgs } from './types/NetworkTracker';
export { NetworkTracker };