import { GoogleUser, User } from '../types';
/**
 * Main Google Authentication function
 * This should be called from within the GoogleOAuthProvider context
 * @returns Promise with user information
 */
export declare function googleAuth(): Promise<User>;
/**
 * Fetches user information from Google using the access token
 * @param accessToken - The access token from Google OAuth
 * @returns Promise with user information
 */
export declare function fetchGoogleUserInfo(accessToken: string): Promise<GoogleUser>;
/**
 * Validates if the Google Client ID is properly formatted
 * @param clientId - The Google OAuth Client ID
 * @returns boolean indicating if the client ID is valid
 */
export declare function validateGoogleClientId(clientId: string): boolean;
/**
 * Stores user information in session storage (optional utility)
 * @param user - The user object
 */
export declare function storeUserSession(user: User): void;
/**
 * Retrieves user information from session storage (optional utility)
 * @returns User object or null
 */
export declare function getUserSession(): User | null;
/**
 * Clears user session from storage
 */
export declare function clearUserSession(): void;
/**
 * Handles OAuth errors and provides user-friendly messages
 * @param error - The error object
 * @returns User-friendly error message
 */
export declare function handleAuthError(error: any): string;
/**
 * Checks if the user is authenticated
 * @returns boolean indicating authentication status
 */
export declare function isAuthenticated(): boolean;
/**
 * Exports the current user's basic info for logging/debugging
 * @param user - The Google user object
 * @returns Sanitized user info without sensitive data
 */
export declare function getSanitizedUserInfo(user: GoogleUser): {
    name: string;
    email: string;
};