import { FoundationContext } from '../types';
/**
 * Calculate the MD5 checksum of the given content as a base64 string.
 * Environment-specific dependencies (`readFile`, `toBase64`) are injected
 * via the {@link FoundationContext} so the foundation layer stays free of
 * any environment-discriminating logic.
 */
export declare const calculateContentMd5: (ctx: FoundationContext, content: Blob | string | ArrayBuffer | ArrayBufferView) => Promise<string>;