Add NEP-5 project, comply with the NEP-5 specification. (#26)

NEP5/NEP5.cs

@@ -0,0 +1,113 @@
+using Neo.SmartContract.Framework;
+using Neo.SmartContract.Framework.Services.Neo;
+using Neo.SmartContract.Framework.Services.System;
+using System;
+using System.ComponentModel;
+using System.Numerics;
+
+namespace NEP5
+{
+    public class NEP5 : SmartContract
+    {
+        [DisplayName("transfer")]
+        public static event Action<byte[], byte[], BigInteger> Transferred;
+
+        private static readonly byte[] Owner = "Ae2d6qj91YL3LVUMkza7WQsaTYjzjHm4z1".ToScriptHash(); //Owner Address
+
+        public static object Main(string method, object[] args)
+        {
+            if (Runtime.Trigger == TriggerType.Verification)
+            {
+                return Runtime.CheckWitness(Owner);
+            }
+            else if (Runtime.Trigger == TriggerType.Application)
+            {
+                var callscript = ExecutionEngine.CallingScriptHash;
+
+                if (method == "balanceOf") return BalanceOf((byte[])args[0]);
+
+                if (method == "decimals") return Decimals();
+
+                if (method == "name") return Name();
+
+                if (method == "symbol") return Symbol();
+
+                if (method == "supportedStandards") return SupportedStandards();
+
+                if (method == "totalSupply") return TotalSupply();
+
+                if (method == "transfer") return Transfer((byte[])args[0], (byte[])args[1], (BigInteger)args[2], callscript);
+            }
+            return false;
+        }
+
+        [DisplayName("balanceOf")]
+        public static BigInteger BalanceOf(byte[] account)
+        {
+            if (account.Length != 20)
+                throw new InvalidOperationException("The parameter account SHOULD be 20-byte addresses.");
+            StorageMap asset = Storage.CurrentContext.CreateMap(nameof(asset));
+            return asset.Get(account).AsBigInteger();
+        }
+        [DisplayName("decimals")]
+        public static byte Decimals() => 8;
+
+        private static bool IsPayable(byte[] to)
+        {
+            var c = Blockchain.GetContract(to);
+            return c == null || c.IsPayable;
+        }
+
+        [DisplayName("name")]
+        public static string Name() => "MyToken"; //name of the token
+
+        [DisplayName("symbol")]
+        public static string Symbol() => "MYT"; //symbol of the token
+
+        [DisplayName("supportedStandards")]
+        public static string[] SupportedStandards() => new string[] { "NEP-5", "NEP-7", "NEP-10" };
+
+        [DisplayName("totalSupply")]
+        public static BigInteger TotalSupply()
+        {
+            StorageMap contract = Storage.CurrentContext.CreateMap(nameof(contract));
+            return contract.Get("totalSupply").AsBigInteger();
+        }
+#if DEBUG
+        [DisplayName("transfer")] //Only for ABI file
+        public static bool Transfer(byte[] from, byte[] to, BigInteger amount) => true;
+#endif
+        //Methods of actual execution
+        private static bool Transfer(byte[] from, byte[] to, BigInteger amount, byte[] callscript)
+        {
+            //Check parameters
+            if (from.Length != 20 || to.Length != 20)
+                throw new InvalidOperationException("The parameters from and to SHOULD be 20-byte addresses.");
+            if (amount <= 0)
+                throw new InvalidOperationException("The parameter amount MUST be greater than 0.");
+            if (!IsPayable(to))
+                return false;
+            if (!Runtime.CheckWitness(from) && from.AsBigInteger() != callscript.AsBigInteger())
+                return false;
+            StorageMap asset = Storage.CurrentContext.CreateMap(nameof(asset));
+            var fromAmount = asset.Get(from).AsBigInteger();
+            if (fromAmount < amount)
+                return false;
+            if (from == to)
+                return true;
+
+            //Reduce payer balances
+            if (fromAmount == amount)
+                asset.Delete(from);
+            else
+                asset.Put(from, fromAmount - amount);
+
+            //Increase the payee balance
+            var toAmount = asset.Get(to).AsBigInteger();
+            asset.Put(to, toAmount + amount);
+
+            Transferred(from, to, amount);
+            return true;
+        }
+    }
+}

NEP5/NEP5.csproj

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{2712642F-46ED-47B6-95D9-FB2567BFA2F5}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>NEP5</RootNamespace>
+    <AssemblyName>NEP5</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>
+    </DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Neo.SmartContract.Framework, Version=2.7.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>.\Neo.SmartContract.Framework.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="NEP5.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+    <None Include="build.tasks" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Neo.ConvertTask.dll" />
+    <Content Include="Neo.SmartContract.Framework.dll" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="Build.tasks" />
+  <Target Name="AfterBuild">
+    <Message Text="Start NeoContract converter, Source File: $(TargetPath)" Importance="high">
+    </Message>
+    <ConvertTask DataSource="$(TargetPath)" />
+  </Target>
+</Project>

NEP5/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("NEP5")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("NEP5")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("2712642f-46ed-47b6-95d9-fb2567bfa2f5")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

NEP5/build.tasks

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <UsingTask AssemblyFile="Neo.ConvertTask.dll" TaskName="Neo.ConvertTask"/>
+</Project>

NEP5/packages.config

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Neo.SmartContract.Framework" version="2.7.3" targetFramework="net40" />
+</packages>

examples.sln

@@ -19,6 +19,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MapExample", "MapExample\Ma
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EventExample", "EventExample\EventExample.csproj", "{63CECEA1-2506-4FDE-BFE2-EA89F75FBF7A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NEP5", "NEP5\NEP5.csproj", "{2712642F-46ED-47B6-95D9-FB2567BFA2F5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -57,6 +59,10 @@ Global
 		{63CECEA1-2506-4FDE-BFE2-EA89F75FBF7A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{63CECEA1-2506-4FDE-BFE2-EA89F75FBF7A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{63CECEA1-2506-4FDE-BFE2-EA89F75FBF7A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2712642F-46ED-47B6-95D9-FB2567BFA2F5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2712642F-46ED-47B6-95D9-FB2567BFA2F5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2712642F-46ED-47B6-95D9-FB2567BFA2F5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2712642F-46ED-47B6-95D9-FB2567BFA2F5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE