/**
 * Data anonymization utilities for privacy-first analytics
 * Ensures no PII is collected as per docs/ANALYTICS_MCP_PLAN.md
 */
import { AnalyticsEvent, AnalyticsLevel } from './types.js';
/**
 * Raw event data before anonymization
 * Includes all possible fields that might be collected
 */
interface RawEventData {
    version: string;
    tool: string;
    status: 'success' | 'error';
    timestamp_hour: string;
    analytics_level?: AnalyticsLevel;
    error_type?: string;
    response_time_ms?: number;
    service?: string;
    cache_hit?: boolean;
    retry_count?: number;
    country?: string;
    parameters?: Record<string, unknown>;
    session_id?: string;
    sequence_number?: number;
}
/**
 * Anonymize event data based on analytics level
 * Strips sensitive information and ensures privacy compliance
 */
export declare function anonymizeEvent(rawData: RawEventData, level: AnalyticsLevel, salt?: string): AnalyticsEvent;
/**
 * Round timestamp to nearest hour for privacy
 * Prevents precise user tracking
 */
export declare function roundToHour(date: Date): string;
export {};
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