import type { CKShare } from './types.js';
/**
 * Split a 32-byte Content Key into Shamir shares.
 */
export declare function splitCK(ck: Uint8Array, threshold: number, total: number): CKShare[];
/**
 * Reconstruct a Content Key from Shamir shares.
 */
export declare function reconstructCK(shares: CKShare[]): Uint8Array;
/**
 * Encode a CK share as "index:hexdata".
 */
export declare function encodeCKShare(share: CKShare): string;
/**
 * Decode a CK share from "index:hexdata" format.
 */
export declare function decodeCKShare(encoded: string): CKShare;
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