/**
 * File validation core module
 * Provides validation for File / Blob instances. Falls back to `Blob` when
 * the global `File` constructor is unavailable.
 */
import { type StandardSchemaV1 } from "../../Validate/standardSchema";
import type { ValidateCoreReturnType } from "../../Validate/type";
/**
 * Creates a validator that checks whether a value is a `File` (or `Blob` in
 * runtimes where `File` is not available)
 * @param {string} [message] - Custom error message for type validation
 * @returns {Function} - Validator function for File / Blob instances
 */
export declare const file: (message?: string) => ((value: File) => ValidateCoreReturnType<File>) & StandardSchemaV1<File, File>;