import { ImageSize } from './types';
/**
 * @description: 获取文件的md5
 * @param {File} file
 * @return {*}
 */
export declare const getMd5: (file: File) => Promise<string>;
/**
 * @description: 获取图片的宽度和高度
 * @param {Blob} file
 * @return {*}
 */
export declare const getImageAttribute: (file: File) => Promise<ImageSize>;
/**
 * @description: 判断当前文件的类型
 * @param {string} value
 * @return {*}
 */
export declare const fileType: (value: string) => string;
/**
 * @description: 判断文件是否存在
 * @param {string} url
 * @return {*}
 */
export declare const isExistFile: (url: string) => Boolean;