/**
 * Split paper key interfaces for the BrightChain identity system.
 *
 * Split paper keys use Shamir's Secret Sharing to divide a 24-word
 * BIP39 mnemonic into N shares with a configurable threshold T.
 * Any T shares can reconstruct the original paper key, but fewer
 * than T shares reveal no information about it.
 *
 * Each share is itself encoded as BIP39 words for human readability
 * and includes a QR code for convenient mobile scanning.
 *
 * All data interfaces are generic over TId so the same interface
 * can serve as a DTO for React clients (string) and as the concrete
 * type used inside Node services (GuidV4Buffer / Uint8Array).
 *
 * Requirements: 2.7
 */
/**
 * Printable template for a single Shamir's Secret Sharing share
 * of a split paper key.
 *
 * @remarks
 * Generated by the Split Paper Key Service, each share template
 * contains the BIP39-encoded share words, a QR code for scanning,
 * and human-readable instructions that include the share number,
 * total share count, and reconstruction threshold.
 *
 * Share templates are intended to be printed and distributed to
 * trusted parties—never stored digitally after generation.
 *
 * @example
 * ```typescript
 * const share: ISplitPaperKeyShare = {
 *   shareNumber: 1,
 *   totalShares: 3,
 *   threshold: 2,
 *   words: ['abandon', 'ability', ...], // BIP39-encoded share
 *   qrCode: 'data:image/png;base64,...',
 *   createdAt: new Date(),
 *   instructions: 'This is share 1 of 3. You need 2 shares to recover your account.',
 * };
 * ```
 */
export interface ISplitPaperKeyShare {
    /** Sequential number of this share (1-based, e.g. 1 of 3) */
    shareNumber: number;
    /** Total number of shares the paper key was split into */
    totalShares: number;
    /**
     * Minimum number of shares required to reconstruct the paper key.
     *
     * @remarks
     * Must satisfy 2 ≤ threshold ≤ totalShares. Fewer than threshold
     * shares reveal no information about the original paper key.
     */
    threshold: number;
    /** BIP39-encoded words representing this share's secret data */
    words: string[];
    /** QR code encoding the share words, as a data URL for printing/scanning */
    qrCode: string;
    /** Timestamp when this share template was generated */
    createdAt: Date;
    /**
     * Human-readable instructions for the share holder.
     *
     * @remarks
     * Typically includes the share number, total shares, and threshold
     * so the holder understands how many collaborators are needed for
     * reconstruction.
     */
    instructions: string;
}
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