import { type Express, type Request as ExpressRequest, type Response as ExpressResponse } from 'express';
import { OwoxTokenFacade } from '../facades/owox-token-facade.js';
/**
 * Controller for Google Sheets Extension authentication
 * Handles POST /auth/api/google-sheets-extension endpoint
 */
export declare class GoogleSheetsExtensionAuthController {
    private readonly tokenFacade;
    private readonly logger;
    constructor(tokenFacade: OwoxTokenFacade);
    /**
     * Issues OWOX tokens for the Google Sheets Extension.
     * Accepts either a Google ID token (initial auth) or a refresh token (token renewal).
     * Token validation and user lookup are handled by the identity service.
     */
    authenticate(req: ExpressRequest, res: ExpressResponse): Promise<void>;
    private static handleError;
    registerRoutes(express: Express): void;
}
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