/**
 * TikTok handle cache.
 *
 * We can't reliably resolve "the currently logged-in TikTok user" via any
 * stable web URL (TikTok has no equivalent of `https://www.tiktok.com/me`
 * that resolves inside a WebView). Trying to infer the handle from cookies,
 * hydration data, or DOM selectors is fragile because TikTok churns those
 * surfaces frequently.
 *
 * Instead we use the only authoritative signal: the URL. When the user
 * navigates to `https://www.tiktok.com/@<handle>` (by tapping their profile
 * tab once), we capture that handle and cache it. Next time the same user
 * connects TikTok, we can open the WebView straight at their profile URL
 * and skip the "find your profile" guessing game entirely.
 *
 * This module owns the storage key + parsing helpers. No UI / no React.
 */
/**
 * Extracts a handle from any TikTok URL of the form
 *   https://www.tiktok.com/@<handle>[/...]
 * Returns the handle (without the leading "@") or '' if the URL is not a
 * profile-shaped TikTok URL.
 *
 * Accepted (returns handle):
 *   https://www.tiktok.com/@bruhnushka
 *   https://www.tiktok.com/@bruhnushka/
 *   https://www.tiktok.com/@bruhnushka/liked
 *   https://www.tiktok.com/@bruh.nushka_42
 *
 * Rejected (returns ''):
 *   https://www.tiktok.com/                       (no handle)
 *   https://www.tiktok.com/foryou                 (no handle)
 *   https://www.tiktok.com/@bruh/video/12345      (video page, not profile)
 *   https://www.tiktok.com/tag/cats               (other section)
 */
export declare const extractTikTokHandleFromUrl: (rawUrl: string | null | undefined) => string;
/**
 * Read the cached TikTok handle for this device. Returns '' when no handle
 * has been captured yet (or AsyncStorage is unavailable).
 */
export declare const getCachedTikTokHandle: () => Promise<string>;
/**
 * Persist a TikTok handle for future sessions. No-op for empty / falsy values
 * so callers don't have to guard against partial detections.
 */
export declare const setCachedTikTokHandle: (handle: string) => Promise<void>;
/**
 * Clear the cached handle. Useful when a user signs out / switches accounts.
 */
export declare const clearCachedTikTokHandle: () => Promise<void>;
/**
 * Build a canonical profile URL for a given handle. Returns '' for invalid
 * handles so callers can branch on truthiness.
 */
export declare const buildTikTokProfileUrl: (handle: string) => string;
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