public async Task <TransactionResponse> GetTransactionDetails(string hash)
        {
            try
            {
                var builder = new TransactionsRequestBuilder(_horizonUrl, _httpClientFactory.CreateClient());
                var tx      = await builder.Transaction(hash);

                return(tx);
            }
            catch (Exception e) when(IsNotFound(e))
            {
                // address not found

                return(null);
            }
        }