/**
 * Wrapper of Axios to do API request to Midtrans API
 * @return {Promise} of API response, or exception during request
 * capable to do HTTP `request`
 * @see https://docs.midtrans.com/reference/code-2xx
 */
export declare class HttpClient {
    private parent;
    private http_client;
    constructor(parentObj?: any);
    request(httpMethod: string, serverKey: string, requestUrl: string, firstParam?: Record<string, any>, secondParam?: Record<string, any>): Promise<any>;
}