/**
 * PWA pseudonymous analytics identity — client-stable opaque keys (plan §Definitions).
 *
 * Keys MUST NOT be derived from IP, UA, or fingerprinting. Generation uses
 * crypto.randomUUID() only.
 */
export declare const ANALYTICS_ANONYMOUS_KEY_MIN_LENGTH = 8;
export declare const ANALYTICS_ANONYMOUS_KEY_MAX_LENGTH = 128;
export declare const ANALYTICS_ANONYMOUS_STORAGE_KEY_PREFIX = "analytics:anonymous:";
/** Generate a new opaque anonymous key (UUID v4). */
export declare function generateAnalyticsAnonymousKey(): string;
/** Validate client-supplied anonymous key format (no PII-shaped values). */
export declare function isValidAnalyticsAnonymousKey(key: string): boolean;
export declare function analyticsAnonymousStorageKey(tenantCode: string): string;
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