/// <summary>
        /// 計算運費
        /// </summary>
        /// <param name="deliveryItem">宅配資料</param>
        /// <returns>運費</returns>
        public double Calculate(DeliveryEntity deliveryItem)
        {
            if (deliveryItem == null)
            {
                throw new ArgumentException("請檢查 deliveryItem 參數");
            }

            ICalculateFeeService calculateFeeService =
                this._calculateFeeDictionary.FirstOrDefault(x => x.Key(deliveryItem.DeliveryType)).Value;

            return(calculateFeeService.CalculateFee(deliveryItem));
        }
        public async Task <IEnumerable <Transaction> > GetPostTransactionsAsync(
            IReadOnlyList <ServiceDescriptor> descriptors, ITransactionContext transactionContext)
        {
            if (!IsAcs8(descriptors))
            {
                return(new List <Transaction>());
            }

            var context = _contextService.Create();

            context.TransactionContext = transactionContext;

            // Generate token contract stub.
            var tokenContractAddress = context.GetContractAddressByName(TokenSmartContractAddressNameProvider.Name);

            if (tokenContractAddress == null)
            {
                return(new List <Transaction>());
            }

            var tokenStub = new TokenContractContainer.TokenContractStub
            {
                __factory = new TransactionGeneratingOnlyMethodStubFactory
                {
                    Sender          = transactionContext.Transaction.To,
                    ContractAddress = tokenContractAddress
                }
            };

            if (transactionContext.Transaction.To == tokenContractAddress &&
                transactionContext.Transaction.MethodName == nameof(tokenStub.ChargeResourceToken))
            {
                return(new List <Transaction>());
            }

            if (transactionContext.Transaction.To == context.Self &&
                transactionContext.Transaction.MethodName == nameof(ResourceConsumptionContractContainer
                                                                    .ResourceConsumptionContractStub.BuyResourceToken))
            {
                return(new List <Transaction>());
            }

            // Transaction size related to NET Token.
            var netSize = transactionContext.Transaction.Size();
            // Transaction trace state set writes count related to STO Token.
            var writesCount = transactionContext.Trace.StateSet.Writes.Count;
            // Transaction trace state set reads count related to CPU Token.
            var readsCount = transactionContext.Trace.StateSet.Reads.Count;
            var netCost    = _calService.CalculateFee(FeeType.Net, netSize);
            var cpuCost    = _calService.CalculateFee(FeeType.Cpu, readsCount);
            var stoCost    = _calService.CalculateFee(FeeType.Sto, netSize);
            var ramCost    = _calService.CalculateFee(FeeType.Ram, writesCount);
            var chargeResourceTokenTransaction = (await tokenStub.ChargeResourceToken.SendAsync(
                                                      new ChargeResourceTokenInput
            {
                NetCost = netCost,
                StoCost = stoCost,
                CpuCost = cpuCost,
                RamCost = ramCost,
                Caller = transactionContext.Transaction.From
            })).Transaction;

            return(new List <Transaction>
            {
                chargeResourceTokenTransaction
            });
        }
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        public async Task <IEnumerable <Transaction> > GetPreTransactionsAsync(
            IReadOnlyList <ServiceDescriptor> descriptors, ITransactionContext transactionContext)
        {
            try
            {
                var context = _contextService.Create();

                if (_transactionFeeExemptionService.IsFree(transactionContext.Transaction))
                {
                    return(new List <Transaction>());
                }

                context.TransactionContext = transactionContext;
                var tokenContractAddress = context.GetContractAddressByName(TokenSmartContractAddressNameProvider.Name);

                if (context.CurrentHeight < Constants.GenesisBlockHeight + 1 || tokenContractAddress == null)
                {
                    return(new List <Transaction>());
                }

                if (!IsAcs1(descriptors) && transactionContext.Transaction.To != tokenContractAddress)
                {
                    return(new List <Transaction>());
                }

                var tokenStub = new TokenContractContainer.TokenContractStub
                {
                    __factory = new TransactionGeneratingOnlyMethodStubFactory
                    {
                        Sender          = transactionContext.Transaction.From,
                        ContractAddress = tokenContractAddress
                    }
                };
                if (transactionContext.Transaction.To == tokenContractAddress &&
                    transactionContext.Transaction.MethodName == nameof(tokenStub.ChargeTransactionFees))
                {
                    // Skip ChargeTransactionFees itself
                    return(new List <Transaction>());
                }

                var txSize = transactionContext.Transaction.Size();
                var txCost = _calService.CalculateFee(FeeType.Tx, txSize);
                var chargeFeeTransaction = (await tokenStub.ChargeTransactionFees.SendAsync(
                                                new ChargeTransactionFeesInput
                {
                    MethodName = transactionContext.Transaction.MethodName,
                    ContractAddress = transactionContext.Transaction.To,
                    TransactionSizeFee = txCost,
                    PrimaryTokenSymbol = await _primaryTokenSymbolProvider.GetPrimaryTokenSymbol()
                })).Transaction;
                return(new List <Transaction>
                {
                    chargeFeeTransaction
                });
            }
            catch (Exception e)
            {
                Logger.LogError(e, "Failed to generate ChargeTransactionFees tx.");
                throw;
            }
        }