import { type FailCallbackResult, type PickOptions } from '../../core';
export interface FileToBase64Result {
    base64: string;
}
export interface FileToBase64Options {
    filePath: string;
    success?: (result: FileToBase64Result) => void;
    fail?: (err: FailCallbackResult) => void;
}
/**
 * 文件转base64。
 */
export declare const fileToBase64: <T extends FileToBase64Options = FileToBase64Options>(options: T) => import("../../core").PromisifySuccessResult<PickOptions<T>, FileToBase64Options>;