blockChain

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace CryptoMain
{
    public class BlockChain
    {
        private static string url = "https://blockchain.info/pt/ticker";
        private static JObject j;

        private string GetResponse(string uri)
        {
            WebClient navegador = new WebClient();
            return navegador.DownloadString(uri);
        }

        /// <summary>
        /// Use the following param: last, high, low
        /// </summary>
        /// <param name="node"></param>
        /// <returns></returns>
        public string GetDataByNode(string node)
        {
            j = JObject.Parse(GetResponse(url));
            try
            {
                return j["USD"][node].ToString();
            }
            catch (Exception )
            {
                return "ERR";
            }
        }
    }
}