def cancel(id)
      have_key?
      address = @url_private + "/trade_cancel/"
      params = {
        "id" => id,
      }
      h = post_ssl_with_sign(address, params)
      {
        "success" => h["result"],
      }
    end
def cancel(id)
      have_key?
      address = @url_private + "/trade_cancel/"
      params = {
        "id" => id,
      }
      h = post_ssl_with_sign(address, params)
      {
        "success" => h["result"],
      }
    end
Cancel an open order
 @abstract
 @param [int or string] order id
 @return [hash]
   success: [bool] status