/**
 * Builds the key that answers "is this the same manifest?" for decision-reload throttling.
 * Android parity: `plugin-android` `internal/balancer-impl/.../ManifestKeyNormalizer.kt`.
 *
 * The throttle keys on the manifest URL, so a stream whose URL carries rotating non-content query
 * parameters looks like a brand-new manifest on every poll and the per-URL interval never engages.
 * Low-Latency HLS is the clearest case: a blocking reload appends delivery directives that change
 * every request while the content is identical.
 *
 * Scope note, measured rather than assumed (devs-committee task
 * cdn-balancer/2026-08-17_plugin-js-ll-hls-midstream-switch-smarttv, measurement M1): unlike
 * Android, plugin-js does NOT churn on its own intercept path — it strips the query before keying
 * there, and 40 rotating blocking reloads produced 2 decisions. The path that does churn is an
 * integrator calling `setManifestResource()` with the full low-latency URL: 12 such calls produced
 * 12 decisions. That is what this normalizer closes.
 *
 * It never touches the URL sent on the wire: the backend signs from the complete query-bearing
 * resource and matches customer URL rules against it, so the decision request keeps the raw URL.
 *
 * Parsing is string-based and order-preserving, so two URLs that genuinely differ can never
 * collapse onto one key through re-encoding or reordering. A parameter name is everything before
 * the FIRST `=` — credential values embed further `=` signs (`hdnts=st=1777985338~hmac=...`) and
 * splitting on each one would truncate the name. Matching is case-insensitive.
 *
 * Not ported from Android: `learnFromDecision`, which adds each provider's credential parameter
 * name from the decision payload. That belongs with per-CDN token management and is tracked
 * separately; the directives below are spec-fixed and need no learning.
 */
/**
 * LL-HLS blocking-reload delivery directives (RFC 8216bis 6.2.5). Fixed by the spec and meaningless
 * as content identifiers, so these are stripped unconditionally and cannot be configured away.
 */
export declare const ALWAYS_STRIPPED: string[];
/**
 * Default value of `BalancerOptions.ephemeralQueryParams`: common cache-busters, which rotate by
 * definition. Overridable — unlike {@link ALWAYS_STRIPPED} — because they are short generic words
 * an origin could legitimately use to select content.
 */
export declare const DEFAULT_EPHEMERAL_QUERY_PARAMS: string[];
/**
 * The manifest URL with ephemeral parameters removed, for use as a comparison key only.
 * Returns the input unchanged when there is nothing to strip.
 */
export declare function manifestKey(manifestUrl: string, configured?: string[]): string;
declare const _default: {
    manifestKey: typeof manifestKey;
    ALWAYS_STRIPPED: string[];
    DEFAULT_EPHEMERAL_QUERY_PARAMS: string[];
};
export default _default;