/**
 * Signing constants shared between server (HMAC) and client (page-token) code.
 *
 * Kept in a crypto-free module so client bundles can import the param names
 * without pulling in `node:crypto`.
 */
/** Query param name for the HMAC signature. */
export declare const SIG_PARAM = "sig";
/** Length of the hex signature (16 chars = 64 bits). */
export declare const SIG_LENGTH = 16;
/** Query param name for the page token. */
export declare const PAGE_TOKEN_PARAM = "_pt";
/** Query param name for the page token timestamp. */
export declare const PAGE_TOKEN_TS_PARAM = "_ts";
/** Default max age for page tokens in seconds (1 hour). */
export declare const PAGE_TOKEN_MAX_AGE = 3600;