import { BaseValidator } from './base';
import type { FileLike, FileValidatorType, ValidationNames } from '../types/index';
/** Factory for chaining: `v.file().required().image().maxBytes(2_000_000)`. */
export declare function file(): FileValidator;
/**
 * Validator for `UploadedFile`-shaped values — typically what
 * `request.file('avatar')` returns. Composable like every other
 * `v.<x>()` builder; chain `.image()`, `.mimeTypes()`, `.maxBytes()`,
 * etc. to add rules.
 *
 * @example
 * ```ts
 * schema.file().required().image().maxBytes(2 * 1024 * 1024)
 * ```
 */
export declare class FileValidator extends BaseValidator<FileLike> implements FileValidatorType {
  name: ValidationNames;
  constructor();
  mimeTypes(types: string[]): this;
  image(): this;
  maxBytes(max: number): this;
  minBytes(min: number): this;
  extensions(exts: string[]): this;
  custom(fn: (value: FileLike) => boolean, message: string): this;
}