import { type FirebaseApp } from '@react-native-firebase/app';
import type { AppCheck, AppCheckOptions, AppCheckTokenResult, PartialObserver, Unsubscribe } from './types/appcheck';
export { CustomProvider, ReactNativeFirebaseAppCheckProvider } from './providers';
/**
 * Activate App Check for the given app. Can be called only once per app.
 * @param app - The app to initialize App Check for. Optional.
 * @param options - App Check options.
 * @returns Promise<AppCheck>
 */
export declare function initializeAppCheck(app?: FirebaseApp, options?: AppCheckOptions): Promise<AppCheck>;
/**
 * Get the current App Check token. Attaches to the most recent in-flight request if one is present.
 * Returns null if no token is present and no token requests are in-flight.
 * @param appCheckInstance - The App Check instance.
 * @param forceRefresh - Whether to force refresh the token. Optional
 * @returns Promise<AppCheckTokenResult>
 */
export declare function getToken(appCheckInstance: AppCheck, forceRefresh?: boolean): Promise<AppCheckTokenResult>;
/**
 * Get a limited-use (consumable) App Check token.
 * For use with server calls to firebase functions or custom backends using the firebase admin SDK.
 * @param appCheckInstance - The App Check instance.
 * @returns Promise<AppCheckTokenResult>
 */
export declare function getLimitedUseToken(appCheckInstance: AppCheck): Promise<AppCheckTokenResult>;
/**
 * Set whether App Check will automatically refresh tokens as needed.
 * @param appCheckInstance - The App Check instance.
 * @param isAutoRefreshEnabled - Whether to enable auto-refresh.
 */
export declare function setTokenAutoRefreshEnabled(appCheckInstance: AppCheck, isAutoRefreshEnabled: boolean): void;
/**
 * Registers a listener to changes in the token state. There can be more
 * than one listener registered at the same time for one or more
 * App Check instances. The listeners call back on the UI thread whenever
 * the current token associated with this App Check instance changes.
 *
 * @param appCheckInstance - The App Check instance.
 * @param observer - The listener to register.
 * @returns Unsubscribe
 */
export declare function onTokenChanged(appCheckInstance: AppCheck, observer: PartialObserver<AppCheckTokenResult>): Unsubscribe;
/**
 * Registers a listener to changes in the token state. There can be more
 * than one listener registered at the same time for one or more
 * App Check instances. The listeners call back on the UI thread whenever
 * the current token associated with this App Check instance changes.
 *
 * @param appCheckInstance - The App Check instance.
 * @param onNext - The callback function for token changes.
 * @param onError - Optional error callback.
 * @param onCompletion - Optional completion callback.
 * @returns Unsubscribe
 */
export declare function onTokenChanged(appCheckInstance: AppCheck, onNext: (tokenResult: AppCheckTokenResult) => void, onError?: (error: Error) => void, onCompletion?: () => void): Unsubscribe;
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