public async Task <decimal> GetGasPriceGwei(TransferPriority priority)
        {
            try
            {
                RestClient client  = new RestClient("https://ethgasstation.info/");
                var        request = new RestRequest("json/ethgasAPI.json", Method.GET);

                var response = await client.ExecuteGetTaskAsync(request);

                var result = JObject.Parse(response.Content);

                switch (priority)
                {
                case TransferPriority.Average:
                    return(result["average"].ToObject <decimal>());

                case TransferPriority.Fast:
                    return(result["fast"].ToObject <decimal>());

                case TransferPriority.Fastest:
                    return(result["fastest"].ToObject <decimal>());

                case TransferPriority.Low:
                    return(result["safeLow"].ToObject <decimal>());

                default:
                    return(0);
                }
            }
            catch (Exception e)
            {
                return(0);
            }
        }
        public async Task <BigInteger> GetGasPrice(TransferPriority priority)
        {
            var price = ((BigInteger)(await GetGasPriceGwei(priority) * 100000000));

            if (price == 0)
            {
                price = (await web3.Eth.GasPrice.SendRequestAsync());
            }

            return(price);
        }