import { HttpMethod } from '../constants/common.constant';
import { WechatPayModuleOptions } from '../interfaces/options.interface';
import { SignUtil } from './sign.util';
export declare class AuthUtil {
    private readonly options;
    private readonly signUtil;
    constructor(options: WechatPayModuleOptions, signUtil: SignUtil);
    /**
     * 获取HTTP请求签名信息
     * @param method Http请求方法
     * @param url URL全路径
     * @param params 请求参数
     * @returns Http签名信息
     */
    authorization(method: HttpMethod, url: string, params?: string | object): string;
}