/**
 * MCP Approval Cache Service
 *
 * Caches MCP server approval decisions for session or persistent reuse.
 * Prevents repeated approval prompts for the same server.
 */
import type { MCPApprovalCacheEntry, MCPApprovalMemory, MCPApprovalResult } from '../types/mcp-client.types.js';
/**
 * MCP Approval Cache Service
 *
 * Responsibilities:
 * - Cache approved servers per session
 * - Support persistent approval storage
 * - Check if approval already granted before prompting
 * - Handle approval expiry
 */
export declare class MCPApprovalCacheService {
    private persistentCachePath;
    private persistentCache;
    private persistentCacheLoaded;
    private sessionCache;
    private sessionStartTime;
    constructor(persistentCachePath?: string);
    /**
     * Check if a server is approved
     */
    isApproved(serverId: string): boolean;
    /**
     * Get cached approval entry for a server
     */
    getApproval(serverId: string): MCPApprovalCacheEntry | null;
    /**
     * Get allowed tools for an approved server
     */
    getAllowedTools(serverId: string): null | string[];
    /**
     * Cache an approval decision
     */
    cacheApproval(serverId: string, result: MCPApprovalResult, memoryType: MCPApprovalMemory): Promise<void>;
    /**
     * Revoke approval for a server
     */
    revokeApproval(serverId: string): Promise<void>;
    /**
     * Clear all session approvals
     */
    clearSessionApprovals(): void;
    /**
     * Clear all approvals (session and persistent)
     */
    clearAllApprovals(): Promise<void>;
    /**
     * Load persistent cache from disk
     */
    loadPersistentCache(): Promise<void>;
    /**
     * Save persistent cache to disk
     */
    private savePersistentCache;
    /**
     * Check if a session cache entry is still valid
     */
    private isSessionEntryValid;
    /**
     * Check if a persistent cache entry is still valid
     */
    private isPersistentEntryValid;
    /**
     * Calculate expiry time based on memory type
     */
    private calculateExpiry;
    /**
     * Get cache statistics
     */
    getStats(): {
        persistentCount: number;
        sessionCount: number;
    };
}
/**
 * Get the MCP Approval Cache service instance
 */
export declare function getMCPApprovalCache(cachePath?: string): MCPApprovalCacheService;
/**
 * Reset the singleton (for testing)
 */
export declare function resetMCPApprovalCache(): void;
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