import { IOAuthProvider, OAuthOptions, OAuthFlowState, TokenData } from '../interfaces.js';
/**
 * Google-specific OAuth implementation
 */
export declare class GoogleOAuthProvider implements IOAuthProvider {
    /**
     * Initialize the Google OAuth flow and generate an authorization URL
     */
    initializeOAuthFlow(options: OAuthOptions): Promise<OAuthFlowState>;
    /**
     * Handle the OAuth callback and exchange the code for tokens
     */
    handleCallback(code: string, options: OAuthOptions): Promise<TokenData>;
    /**
     * Refresh an access token using a refresh token
     */
    refreshToken(refreshToken: string, options: OAuthOptions): Promise<TokenData>;
    /**
     * Revoke a token (can be either an access token or a refresh token)
     */
    revokeToken(token: string, options: OAuthOptions): Promise<boolean>;
    /**
     * Create an OAuth2Client instance with the provided options
     * @private
     */
    private createOAuth2Client;
}