/**
 * Constants
 *
 * Following PostHog's pattern for constant definitions.
 * These are used throughout the SDK for:
 * - Storage keys
 * - Property names
 * - Event names
 * - Configuration defaults
 */
/** SDK version - automatically synced from package.json */
export declare const SDK_VERSION: string;
/** @deprecated Use DISTINCT_ID instead */
export declare const PEOPLE_DISTINCT_ID_KEY = "$people_distinct_id";
/** Current distinct_id */
export declare const DISTINCT_ID = "distinct_id";
/** Alias ID for aliasing operations */
export declare const ALIAS_ID_KEY = "__alias";
/** Event timers storage key */
export declare const EVENT_TIMERS_KEY = "__timers";
/** Session ID storage key */
export declare const SESSION_ID = "$sesid";
/** Session storage key (for session manager) */
export declare const STORAGE_KEY = "__vt_session";
/** sessionStorage key — last meaningful capture time (ms since epoch) */
export declare const SESSION_LAST_ACTIVITY_KEY = "__vt_session_last_activity";
/** Window ID storage key */
export declare const WINDOW_ID = "$windowid";
/** Window ID key (for session storage) */
export declare const WINDOW_ID_KEY = "__vt_window_id";
/** Primary window exists key (for tab duplication detection) */
export declare const PRIMARY_WINDOW_EXISTS_KEY = "__vt_primary_window";
/** User state (anonymous/identified) */
export declare const USER_STATE = "$user_state";
/** User state storage key */
export declare const USER_STATE_KEY = "__vt_user_state";
/** Device ID storage key */
export declare const DEVICE_ID = "$device_id";
/** Device ID key (for storage) */
export declare const DEVICE_ID_KEY = "__vt_device_id";
/** Anonymous ID storage key */
export declare const ANONYMOUS_ID = "$anonymous_id";
/** Anonymous ID key (for storage) */
export declare const ANONYMOUS_ID_KEY = "__vt_anonymous_id";
/** Remote config cache key prefix (localStorage: `${REMOTE_CONFIG_KEY}_${token}`) */
export declare const REMOTE_CONFIG_KEY = "__vt_remote_config";
/** Distinct ID key (for storage) */
export declare const DISTINCT_ID_KEY = "__vt_distinct_id";
/** User properties storage key */
export declare const USER_PROPERTIES_KEY = "__vt_user_properties";
/**
 * Persistence methods object
 * Following PostHog's approach for storage/persistence configuration
 */
export declare const PERSISTENCE_METHODS: {
    cookie: "cookie";
    localStorage: "localStorage";
    localStoragePlusCookie: "localStorage+cookie";
    sessionStorage: "sessionStorage";
    memory: "memory";
};
/** Enable person processing flag */
export declare const ENABLE_PERSON_PROCESSING = "$epp";
/** Initial person info (referrer, URL, UTM params) */
export declare const INITIAL_PERSON_INFO = "$initial_person_info";
/** @deprecated Use INITIAL_PERSON_INFO */
export declare const INITIAL_CAMPAIGN_PARAMS = "$initial_campaign_params";
/** @deprecated Use INITIAL_PERSON_INFO */
export declare const INITIAL_REFERRER_INFO = "$initial_referrer_info";
/** Stored person properties for feature flags */
export declare const STORED_PERSON_PROPERTIES_KEY = "$stored_person_properties";
/** Stored group properties for feature flags */
export declare const STORED_GROUP_PROPERTIES_KEY = "$stored_group_properties";
export declare const AUTOCAPTURE_DISABLED_SERVER_SIDE = "$autocapture_disabled_server_side";
export declare const WEB_VITALS_ENABLED_SERVER_SIDE = "$web_vitals_enabled_server_side";
export declare const SESSION_RECORDING_ENABLED_SERVER_SIDE = "$session_recording_enabled_server_side";
/** Pageview event */
export declare const EVENT_PAGEVIEW = "$pageview";
/** Pageleave event */
export declare const EVENT_PAGELEAVE = "$pageleave";
/** Identify event */
export declare const EVENT_IDENTIFY = "$identify";
/** Alias event */
export declare const EVENT_ALIAS = "$alias";
/** Set person properties event */
export declare const EVENT_SET = "$set";
/** Performance event */
export declare const EVENT_PERFORMANCE = "$performance_event";
/** Autocapture event */
export declare const EVENT_AUTOCAPTURE = "$autocapture";
/** Scroll depth milestone event (autocapture) */
export declare const EVENT_SCROLL_DEPTH = "$scroll_depth";
/** Snapshot event (session recording) */
export declare const EVENT_SNAPSHOT = "$snapshot";
/** Snapshot batch items event */
export declare const EVENT_SNAPSHOT_ITEMS = "$snapshot_items";
/** Rate limit warning event */
export declare const EVENT_RATE_LIMIT_WARNING = "$$client_ingestion_warning";
/** Process person profile flag */
export declare const PROP_PROCESS_PERSON_PROFILE = "$process_person_profile";
/** Is identified flag */
export declare const PROP_IS_IDENTIFIED = "$is_identified";
/** Session ID property */
export declare const PROP_SESSION_ID = "$session_id";
/** Window ID property */
export declare const PROP_WINDOW_ID = "$window_id";
/** Current URL */
export declare const PROP_CURRENT_URL = "$current_url";
/** Hostname */
export declare const PROP_HOST = "$host";
/** Pathname */
export declare const PROP_PATHNAME = "$pathname";
/** Seconds on the page being left ($pageleave) */
export declare const PROP_PREV_PAGEVIEW_DURATION = "$prev_pageview_duration";
/** Pathname of the page being left */
export declare const PROP_PREV_PAGEVIEW_PATHNAME = "$prev_pageview_pathname";
/** URL of the page being left */
export declare const PROP_PREV_PAGEVIEW_URL = "$prev_pageview_url";
/** Scroll depth milestone threshold (0–100) */
export declare const PROP_SCROLL_DEPTH_PCT = "$scroll_depth_pct";
/** Max scroll depth % at time of milestone event */
export declare const PROP_SCROLL_DEPTH_MAX_PCT = "$scroll_depth_max_pct";
/** Max scroll depth % on the page being left ($pageleave) */
export declare const PROP_PREV_PAGEVIEW_SCROLL_DEPTH_PCT = "$prev_pageview_scroll_depth_pct";
/** Referrer URL */
export declare const PROP_REFERRER = "$referrer";
/** Referring domain */
export declare const PROP_REFERRING_DOMAIN = "$referring_domain";
/** Browser */
export declare const PROP_BROWSER = "$browser";
/** Browser version */
export declare const PROP_BROWSER_VERSION = "$browser_version";
/** Operating system */
export declare const PROP_OS = "$os";
/** OS version */
export declare const PROP_OS_VERSION = "$os_version";
/** Device type */
export declare const PROP_DEVICE_TYPE = "$device_type";
/** Screen height */
export declare const PROP_SCREEN_HEIGHT = "$screen_height";
/** Screen width */
export declare const PROP_SCREEN_WIDTH = "$screen_width";
/** Viewport height */
export declare const PROP_VIEWPORT_HEIGHT = "$viewport_height";
/** Viewport width */
export declare const PROP_VIEWPORT_WIDTH = "$viewport_width";
/** Library name */
export declare const PROP_LIB = "$lib";
/** Library version */
export declare const PROP_LIB_VERSION = "$lib_version";
export declare const PROP_GEOIP_COUNTRY_CODE = "$geoip_country_code";
export declare const PROP_GEOIP_COUNTRY_NAME = "$geoip_country_name";
export declare const PROP_GEOIP_CITY_NAME = "$geoip_city_name";
export declare const PROP_GEOIP_REGION_NAME = "$geoip_region_name";
export declare const PROP_GEOIP_CONTINENT_CODE = "$geoip_continent_code";
export declare const PROP_GEOIP_TIMEZONE = "$geoip_timezone";
export declare const PROP_GEOIP_LATITUDE = "$geoip_latitude";
export declare const PROP_GEOIP_LONGITUDE = "$geoip_longitude";
/** Initial GeoIP properties (set once) */
export declare const PROP_INITIAL_GEOIP_PREFIX = "$initial_geoip_";
export declare const UTM_PARAMS: readonly ["utm_source", "utm_medium", "utm_campaign", "utm_content", "utm_term", "gclid", "gad_source", "gbraid", "wbraid", "fbclid", "msclkid", "twclid", "li_fat_id", "mc_cid", "igshid", "ttclid"];
export type UTMParam = (typeof UTM_PARAMS)[number];
export declare const PERSISTENCE_RESERVED_PROPERTIES: string[];
/**
 * Person profiles configuration mode
 * - 'always': Always create person profiles (default)
 * - 'identified_only': Only create profiles when user is identified
 * - 'never': Never create person profiles (events only)
 */
export type PersonProfilesMode = "always" | "identified_only" | "never";
/** Default API host */
export declare const DEFAULT_API_HOST = "https://api.vtilt.io";
/** Default flush interval (ms) */
export declare const DEFAULT_FLUSH_INTERVAL_MS = 5000;
/** Default batch size */
export declare const DEFAULT_BATCH_SIZE = 10;
/** Session timeout (30 minutes in ms) */
export declare const SESSION_TIMEOUT_MS: number;
/** Session ID change threshold (ms) */
export declare const SESSION_CHANGE_THRESHOLD_MS: number;
/** Maximum event properties size (bytes) */
export declare const MAX_PROPERTIES_SIZE = 65535;
/** Maximum property value length */
export declare const MAX_PROPERTY_VALUE_LENGTH = 8192;
/** Timezone to country code mapping */
export declare const TIMEZONES: Record<string, string>;