/// <summary>
 /// Adds a node to connect
 /// </summary>
 /// <param name="nodes">String containing 1 or multiple IP:port separated by "{ }"</param>
 /// <returns>Returns an integer with nodes added</returns>
 public static Task <int> AddNodeAsync(this IPascalCoinClient client, string nodes)
 {
     return(Task.Run(() => client.AddNode(nodes)));
 }