private String sign_api(String path, Dictionary <String, String> paras) { String result = ""; // String timeStamp = GetTimeStamp(); paras.Add("apiKey", this.apiKey); paras.Add("timeStamp", timeStamp); paras.Add("nonce", timeStamp.Substring(0, 6)); String sign = SignUtil.buildSign(paras, this.secretKey); paras.Add("sign", sign); // try { result = HttpUtilManager.getInstance().requestHttpPost(BitzApiRestClient.WEB_BASE, path, paras); } catch (Exception e) { throw e; } return(result); }