/**
 * The raw data stored for a cached response.
 */
export interface CacheEntry {
    /** The serialized response body, as passed to `res.send()`. */
    body: unknown;
    /** HTTP status code of the cached response (e.g. `200`, `201`). */
    statusCode: number;
    /** Value of the `Content-Type` response header (e.g. `application/json; charset=utf-8`). */
    contentType: string;
    /** Unix timestamp (ms) at which the entry expires, or `null` when TTL is `Infinity`. */
    expiresAt: number | null;
    /** Number of times this entry has been requested (including the initial cache miss). */
    hits: number;
    /** Approximate size of the cached body in bytes. */
    size: number;
    /**
     * Unix timestamp (ms) after which the entry is considered stale but still
     * servable while a background refresh runs (stale-while-revalidate).
     * `null` or absent when the entry has no stale window.
     */
    staleAt?: number | null;
    /** Invalidation tags attached to the entry. See `deleteByTag`. */
    tags?: string[];
}
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