/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { type SixthUserInfo } from './sixthAuth.js';
export interface SubscriptionStatus {
    isSubscriber: boolean;
    hasExceededLimit: boolean;
    shouldBlock: boolean;
    totalTokensUsed: number;
    remainingTokens: number;
    usagePercentage: number;
    userInfo: SixthUserInfo | null;
}
export declare class SubscriptionManager {
    /**
     * Cache JWT token for re-authentication
     */
    static cacheJWT(token: string, expiresInHours?: number): Promise<void>;
    /**
     * Get cached JWT token
     */
    static getCachedJWT(): Promise<string | null>;
    /**
     * Clear cached JWT
     */
    static clearJWT(): Promise<void>;
    /**
     * Refresh user info from API using cached JWT
     */
    static refreshUserInfo(): Promise<SixthUserInfo | null>;
    /**
     * Get complete subscription status
     */
    static getSubscriptionStatus(): Promise<SubscriptionStatus>;
    /**
     * Add token usage and check if user should be blocked
     */
    static addTokenUsageAndCheck(tokens: number): Promise<SubscriptionStatus>;
    /**
     * Open pricing page in browser
     */
    static openPricingPage(): Promise<void>;
    /**
     * Handle subscription upgrade flow
     */
    static handleSubscriptionUpgrade(): Promise<boolean>;
    /**
     * Check if user needs to be warned about approaching limit
     */
    static shouldWarnUser(): Promise<boolean>;
    /**
     * Get warning message for approaching limit
     */
    static getWarningMessage(): Promise<string>;
}