/**
 * @typedef {Object} DecodedJwt
 * @property {Record<string, unknown>} header
 * @property {Record<string, unknown>} payload
 * @property {Buffer} signature
 */
/**
 * @param {string} token
 * @returns {DecodedJwt}
 */
export function decode(token: string): DecodedJwt;
/**
 * @param {string} token
 * @returns {Record<string, unknown>}
 */
export function decodeProtectedHeader(token: string): Record<string, unknown>;
/**
 * Split a compact JWT into its three base64url segments. Exported for
 * internal reuse by `verify` and `peek`.
 *
 * @param {string} token
 * @returns {{ encHeader: string, encPayload: string, encSig: string }}
 */
export function _splitCompact(token: string): {
    encHeader: string;
    encPayload: string;
    encSig: string;
};
export type DecodedJwt = {
    header: Record<string, unknown>;
    payload: Record<string, unknown>;
    signature: Buffer;
};