import { Buffer } from 'node:buffer';
/**
 * Calculate checksum using the specified algorithm
 * @param data - Buffer or file path to calculate checksum for
 * @param algorithm - Hash algorithm to use ('sha256' or 'crc32')
 * @returns Hexadecimal checksum string
 */
export declare function getChecksum(data: Buffer | string, algorithm?: 'sha256' | 'crc32'): Promise<string>;