import { ITokenStorage, TokenData } from '../interfaces.js';
/**
 * Simple in-memory implementation of token storage.
 * Note: This is NOT suitable for production use as tokens are lost when the process exits.
 * It's intended for testing and demonstration purposes only.
 */
export declare class MemoryTokenStorage implements ITokenStorage {
    private tokenStore;
    /**
     * Save tokens for a user
     */
    saveTokens(userId: string, tokens: TokenData): Promise<void>;
    /**
     * Retrieve tokens for a user
     */
    getTokens(userId: string): Promise<TokenData | null>;
    /**
     * Update tokens for a user
     */
    updateTokens(userId: string, tokens: TokenData): Promise<void>;
    /**
     * Delete tokens for a user
     */
    deleteTokens(userId: string): Promise<boolean>;
}