started c# pow implementation

pow-csharp/.gitignore

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pow-csharp/UnitTest1.cs

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+using NUnit.Framework;
+
+namespace pow_csharp
+{
+    public class Tests
+    {
+        [SetUp]
+        public void Setup()
+        {
+        }
+
+        [Test]
+        public void Test1()
+        {
+            Assert.Pass();
+        }
+    }
+}

pow-csharp/onionrpow-cli/Program.cs

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+using System;
+using System.Text;
+
+using onionrpow;
+
+namespace onionrpow_cli
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+            onionrpow.OnionrPow.compute(Encoding.UTF8.GetBytes("test"), 4);
+        }
+    }
+}

pow-csharp/onionrpow-cli/onionrpow-cli.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\onionrpow\onionrpow.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>onionrpow_cli</RootNamespace>
+  </PropertyGroup>
+
+</Project>

pow-csharp/onionrpow/OnionrPow.cs

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+using System;
+using System.Text;
+using SHA3;
+using System.Linq;
+using System.Collections.Generic;
+
+namespace onionrpow
+{
+    public class OnionrPow
+    {
+        public static void compute(byte[] data, int difficulty){
+            using (var shaAlg = SHA3.Net.Sha3.Sha3256())
+            {
+                // Replace beginning json with nonce
+                int counter = 0;
+                var copy = new List<byte>();
+
+                foreach(byte co in data){
+                    if (counter < 1){
+                        counter += 1;
+                        continue;
+                        //copy.Add(Encoding.UTF8.GetBytes("{\"pow\": "))
+                    }
+                    counter += 1;
+                    copy.Add(co);
+                }
+                int c = 0;
+                while (true){
+                    toploop:
+                    c += 1;
+                    var num = Encoding.UTF8.GetBytes("{\"pow\": " + c.ToString() + ",");
+                    var copy2 = new List<byte>();
+
+                    copy2.AddRange(num);
+                    copy2.AddRange(copy);
+                    var hash = shaAlg.ComputeHash(copy2.ToArray());
+
+                    int counter2 = 0;
+                    foreach(byte one in hash){
+                        if ((int) one != 0){
+                            goto toploop;
+                        }
+                        counter2 += 1;
+                        if (counter2 == difficulty){
+                            break;
+                        }
+                    }
+                    Console.WriteLine(BitConverter.ToString(hash));
+                    break;
+               }
+            }
+        }
+        //b'{"meta":"{\\"ch\\":\\"global\\",\\"type\\":\\"brd\\"}","sig":"pR4qmKGGCdnyNyZRlhGfF9GC7bONCsEnY04lTfiVuTHexPJypOqmxe9iyDQQqdR+PB2gwWuNqGMs5O8\\/S\\/hsCA==","signer":"UO74AP5LGQFI7EJTN6NAVINIPU2XO2KA7CAS6KSWGWAY5XIB5SUA====","time":1600542238,"pow":300182}\nxcvxcvvxcxcv'
+    }
+}

pow-csharp/onionrpow/onionrpow.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SHA3.Net" Version="1.2.3" />
+  </ItemGroup>
+
+</Project>

pow-csharp/pow-csharp.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>pow_csharp</RootNamespace>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="NUnit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0"/>
+  </ItemGroup>
+
+</Project>