/**
 * Infer MIME type from data type
 */
export declare function inferMimeTypeFromDataType(dataType: 'image' | 'video' | 'file'): string;
/**
 * Infer data type from input data and create appropriate metadata
 */
export declare function inferDataType(data: any): 'uint8array' | 'string' | 'json' | 'buffer' | 'image' | 'video' | 'file';
export declare function convertDecryptedData(data: Uint8Array, dataType?: 'uint8array' | 'string' | 'json' | 'buffer' | 'image' | 'video' | 'file', metadata?: {
    mimeType?: string;
    filename?: string;
    size?: number;
    custom?: Record<string, any>;
}): string | object | Buffer | Uint8Array | Blob | File;
/**
 * Extract metadata from File or Blob objects
 */
export declare function extractFileMetadata(data: any): {
    mimeType?: string;
    filename?: string;
    size?: number;
};