/**
 * Result of applying sheet protection — contains the hash fields that both
 * Worksheet and WorksheetWriter need to persist.
 */
export interface SheetProtectionHash {
    sheet: boolean;
    algorithmName?: string;
    hashValue?: string;
    saltValue?: string;
    spinCount?: number;
    [key: string]: unknown;
}
/**
 * Build a sheet-protection object with optional password hashing.
 *
 * This is the shared implementation used by both `Worksheet.protect()` and
 * `WorksheetWriter.protect()`. The caller is responsible for assigning the
 * result to its own `sheetProtection` field.
 *
 * @param password - Optional password to hash
 * @param options  - Optional protection flags (objects, scenarios, etc.)
 * @returns A fully-populated sheet-protection object
 */
export declare function buildSheetProtection<T extends {
    spinCount?: number;
}>(password?: string, options?: Partial<T>): Promise<SheetProtectionHash>;