public async Task <IActionResult> WalletNotified(string txid)
        {
            try
            {
                var existentTransaction = transactionService.FindInDatabase(txid);
                var transaction         = await transactionService.GetTransaction(txid);

                if (existentTransaction == null)
                {
                    transactionService.Add(transaction);
                }
                else
                {
                    transactionService.UpdateConfirmations(transaction.TxId, transaction.Confirmations);
                }

                if (walletService.GetWallet() == null)
                {
                    await walletService.CreateWalletIfNecessary();
                }
                else
                {
                    await walletService.UpdateWalletBalance();
                }

                await unitOfWork.SaveChanges();

                existentTransaction = transactionService.FindInDatabase(txid);
                return(Ok(existentTransaction.TxId));
            }
            catch (RpcErrorException ex)
            {
                return(BadRequest(ex.Error));
            }
        }