コード例 #1
0
        ///<inheritdoc />
        public ITransferResult Call(
            ISmartContractState smartContractState,
            Address addressTo,
            ulong amountToTransfer,
            string methodName,
            object[] parameters,
            ulong gasLimit = 0)
        {
            Gas gasRemaining = this.gasMeter.GasAvailable;

            // For a method call, send all the gas unless an amount was selected.Should only call trusted methods so re - entrance is less problematic.
            ulong gasBudget = (gasLimit != 0) ? gasLimit : gasRemaining;

            if (gasRemaining < gasBudget || gasRemaining < GasPriceList.BaseCost)
            {
                return(TransferResult.Failed());
            }

            var message = new InternalCallMessage(
                addressTo.ToUint160(),
                smartContractState.Message.ContractAddress.ToUint160(),
                amountToTransfer,
                (Gas)gasBudget,
                new MethodCall(methodName, parameters)
                );

            // Create a snapshot of the current state
            IState newState = this.state.Snapshot();

            // Apply the message to the snapshot
            StateTransitionResult result = this.stateProcessor.Apply(newState, message);

            // Transition the current state to the new state
            if (result.IsSuccess)
            {
                this.state.TransitionTo(newState);
            }

            this.gasMeter.Spend(result.GasConsumed);

            return(result.IsSuccess
                ? TransferResult.Transferred(result.Success.ExecutionResult)
                : TransferResult.Failed());
        }
コード例 #2
0
        ///<inheritdoc />
        public ITransferResult Transfer(ISmartContractState smartContractState, Address addressTo, ulong amountToTransfer)
        {
            Gas gasRemaining = this.gasMeter.GasAvailable;

            if (gasRemaining < GasPriceList.TransferCost)
            {
                return(TransferResult.Failed());
            }

            ulong gasBudget = (gasRemaining < DefaultGasLimit)
                ? gasRemaining     // have enough for at least a transfer but not for the DefaultGasLimit
                : DefaultGasLimit; // have enough for anything

            var message = new ContractTransferMessage(
                addressTo.ToUint160(),
                smartContractState.Message.ContractAddress.ToUint160(),
                amountToTransfer,
                (Gas)gasBudget
                );

            // Create a snapshot of the current state
            IState newState = this.state.Snapshot();

            // Apply the message to the snapshot
            StateTransitionResult result = this.stateProcessor.Apply(newState, message);

            // Transition the current state to the new state
            if (result.IsSuccess)
            {
                this.state.TransitionTo(newState);
            }

            this.gasMeter.Spend(result.GasConsumed);

            return(result.IsSuccess
                ? TransferResult.Empty()
                : TransferResult.Failed());
        }