import { type FailCallbackResult, type PickOptions } from '../../core';
export interface DownloadFileResult {
    filePath: string;
}
export interface DownloadFileOptions {
    url: string;
    filePath?: string;
    header?: {
        [props: string]: any;
    };
    timeout?: number;
    success?: (result: DownloadFileResult) => void;
    fail?: (err: FailCallbackResult) => void;
}
export declare const downloadFile: <T extends DownloadFileOptions = DownloadFileOptions>(options: T) => import("../../core").PromisifySuccessResult<PickOptions<T>, DownloadFileOptions>;