/**
 * DoS Protection Utilities
 *
 * Comprehensive protection against resource exhaustion and DoS attacks
 * for PZG Pro features
 */
export interface ResourceLimits {
    maxFileSize: number;
    maxMemoryUsage: number;
    maxExecutionTime: number;
    maxIterations: number;
    maxRecursionDepth: number;
    maxArrayLength: number;
    maxStringLength: number;
    maxJSONDepth: number;
    maxJSONSize: number;
    maxConcurrentOperations: number;
}
export declare const DEFAULT_LIMITS: ResourceLimits;
export declare class ResourceExhaustionError extends Error {
    readonly resourceType: string;
    constructor(message: string, resourceType: string);
}
export declare class ExecutionTimeoutError extends Error {
    readonly timeoutMs: number;
    constructor(message: string, timeoutMs: number);
}
/**
 * DoS Protection Manager
 */
export declare class DoSProtection {
    private limits;
    private rateLimiter;
    private activeOperations;
    private startTime;
    constructor(limits?: Partial<ResourceLimits>);
    /**
     * Execute operation with resource limits
     */
    executeWithLimits<T>(operation: () => Promise<T> | T, operationName: string, customLimits?: Partial<ResourceLimits>): Promise<T>;
    /**
     * Safe JSON parsing with limits
     */
    safeJSONParse<T = any>(jsonString: string, operationName?: string): T;
    /**
     * Safe array operation with size limits
     */
    safeArrayOperation<T, R>(array: T[], operation: (item: T, index: number) => R, operationName: string): R[];
    /**
     * Safe string operation with length limits
     */
    safeStringOperation(input: string, _operationName: string): string;
    /**
     * Safe regex execution with timeout protection
     */
    safeRegexExec(regex: RegExp, input: string, operationName: string): RegExpExecArray | null;
    /**
     * Safe file size validation
     */
    validateFileSize(size: number, _operationName: string): void;
    /**
     * Safe loop execution with iteration limits
     */
    safeLoop<T>(iterable: Iterable<T>, operation: (item: T, index: number) => void | Promise<void>, operationName: string): Promise<void>;
    /**
     * Get system resource usage
     */
    getResourceUsage(): {
        memory: NodeJS.MemoryUsage;
        uptime: number;
        activeOperations: number;
        cpuUsage?: NodeJS.CpuUsage;
    };
    /**
     * Reset DoS protection state
     */
    reset(): void;
    private getObjectDepth;
    private executeWithTimeout;
}
/**
 * Global DoS protection instance
 */
export declare const dosProtection: DoSProtection;
/**
 * Decorator for protecting methods against DoS
 */
export declare function dosProtect(operationName?: string, limits?: Partial<ResourceLimits>): (target: any, propertyKey: string, descriptor: PropertyDescriptor) => PropertyDescriptor;
/**
 * Safe array chunker to prevent memory exhaustion
 */
export declare function safeChunker<T>(array: T[], chunkSize: number, maxChunks?: number): Generator<T[], void, unknown>;
/**
 * Safe map operation with limits
 */
export declare function safeMap<T, R>(array: T[], mapper: (item: T, index: number) => R, operationName?: string): R[];
/**
 * Safe filter operation with limits
 */
export declare function safeFilter<T>(array: T[], predicate: (item: T, index: number) => boolean, operationName?: string): T[];
/**
 * Safe forEach operation with limits
 */
export declare function safeForEach<T>(array: T[], operation: (item: T, index: number) => void | Promise<void>, operationName?: string): Promise<void>;