import type { ParsedPacket } from 'coap-packet';
export interface OscoreOptionFields {
    kid: Buffer | null;
    kidContext: Buffer | null;
    piv: Buffer | null;
}
/**
 * Extract the OSCORE option value from a parsed CoAP packet.
 * The OSCORE option has number 9.
 */
export declare function getOscoreOptionValue(packet: ParsedPacket): Buffer | null;
/**
 * Parse an OSCORE option value into its constituent fields.
 * Follows RFC 8613 Section 6.1:
 *   [flags_byte] [piv_bytes...] [kid_context_len] [kid_context_bytes...] [kid_bytes...]
 */
export declare function parseOscoreOption(value: Buffer): OscoreOptionFields;
/**
 * Check if a parsed packet has an OSCORE option.
 */
export declare function hasOscoreOption(packet: ParsedPacket): boolean;