Feature/hash

DltNode/DltNode.Blockchain/Block.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using DltNode.Hash;
+
+namespace DltNode.Blockchain
+{
+    public class Block
+    {
+        public readonly Byte[] blockHash;
+
+        public readonly Byte[] previousBlockHash;
+
+        public readonly List<Transaction> transactions;
+
+        public readonly Byte[] zero;
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="transactions"></param>
+        /// <param name="previousBlock">Put null in to first block constructor</param>
+        public Block(List<Transaction> transactions, Block previousBlock)
+        {
+            zero = new byte[32];
+            this.previousBlockHash = previousBlock?.blockHash ?? zero;
+            this.transactions = transactions;
+
+            List<Byte[]> hashes = new List<Byte[]>();
+            hashes.Add(previousBlockHash);
+            foreach(var tx in transactions)
+            {
+
+                hashes.Add(tx.GetHash());
+            }
+            blockHash = computeMerkleTreeHash(hashes);
+        }
+        public Byte[] computeMerkleTreeHash(List<Byte[]> hashes)
+        {
+            if (hashes.Count == 1)
+                return hashes[0];
+            else if (hashes.Count == 2)
+                return PureHash.computeHash(hashes[0].Concat(hashes[1]).ToArray());
+            else
+            {
+                List<Byte[]> firstPart = hashes.GetRange(0, hashes.Count / 2);
+                List<Byte[]> secondPart = hashes.GetRange(hashes.Count / 2, hashes.Count - 1);
+                var hashOfLeft = computeMerkleTreeHash(firstPart);
+                var hashOfRight = computeMerkleTreeHash(secondPart);
+                return PureHash.computeHash(hashOfLeft.Concat(hashOfRight).ToArray());
+            }
+
+            return Array.Empty<Byte>();
+        }
+    }
+}

DltNode/DltNode.Blockchain/Blockchain.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DltNode.Blockchain
+{
+    public class Blockchain
+    {
+        public List<Block> blockchain;
+
+        public Blockchain(Block genesisBlock)
+        {
+            blockchain = new List<Block>();
+            blockchain.Add(genesisBlock);
+        }
+        public Boolean AddNewBlock(Block newBlock)
+        {
+            if (newBlock.previousBlockHash != blockchain[blockchain.Count() - 1].blockHash)
+            {
+                return false;
+            }
+            else
+            {
+                blockchain.Add(newBlock);
+                return true;
+            }
+        }
+
+        public Int32 Height => blockchain.Count();
+    }
+}

DltNode/DltNode.Blockchain/DltNode.Blockchain.csproj

@@ -1,7 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\DltNode.Hash\DltNode.Hash.csproj" />
+  </ItemGroup>
+
 </Project>

DltNode/DltNode.Blockchain/Transaction.cs

@@ -0,0 +1,16 @@
+using System;
+using DltNode.Hash;
+using System.Text;
+namespace DltNode.Blockchain
+{
+	public class Transaction
+	{
+		public readonly String info;
+		public Transaction(string info)
+        {
+			this.info = info;
+        }
+
+		public Byte[] GetHash() => PureHash.computeHash(Encoding.UTF8.GetBytes(info));
+	}
+}

DltNode/DltNode.Hash/DltNode.Hash.csproj

@@ -0,0 +1,7 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

DltNode/DltNode.Hash/PureHash.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Security.Cryptography;
+using System.Collections;
+namespace DltNode.Hash
+{
+    public static class PureHash
+    {
+
+        //public 
+        public static byte[] computeHash(byte[] input)
+        {
+            var hashing = SHA256.Create();
+            //input.Length 
+
+
+            return hashing.ComputeHash(input);
+        }
+
+    }
+}

DltNode/DltNode.Main/DltNode.Main.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

DltNode/DltNode.Main/Program.cs

@@ -1,14 +1,34 @@
 using System;
-
+using System.Collections.Generic;
+using System.Text;
+using DltNode.Blockchain;
 namespace DltNode.Main
 {
 	class Program
 	{
 		static void Main(string[] args)
 		{
-			Console.WriteLine("Hello World!");
-			Console.WriteLine();
-			Console.WriteLine(1);
+			Transaction tx1 = new Transaction("Product X has moved from A to B");
+			Transaction tx2 = new Transaction("Product Y has moved from C to D");
+
+			List<Transaction> transactions = new List<Transaction>();
+			transactions.Add(tx1);
+			transactions.Add(tx2);
+
+			Block firstBlock = new Block(transactions, null);
+			Console.WriteLine(BitConverter.ToString(firstBlock.blockHash));
+			Transaction tx0 = new Transaction("Product Z has moved from E to F");
+			List<Transaction> transactions1 = new List<Transaction>();
+			transactions1.Add(tx0);
+
+			Block secondBlock = new Block(transactions1, firstBlock);
+			Console.WriteLine(BitConverter.ToString(secondBlock.previousBlockHash));
+			Console.WriteLine(BitConverter.ToString(secondBlock.blockHash));
+
+			Blockchain.Blockchain blockchain = new Blockchain.Blockchain(firstBlock);
+			Console.WriteLine(blockchain.Height);
+			Console.WriteLine(blockchain.AddNewBlock(secondBlock));
+			Console.WriteLine(blockchain.Height);
 		}
 	}
 }

DltNode/DltNode.sln

@@ -3,9 +3,11 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.30804.86
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DltNode.Main", "DltNode.Main\DltNode.Main.csproj", "{B8E636E8-B130-42C2-A2D9-24E95AAB97AA}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DltNode.Main", "DltNode.Main\DltNode.Main.csproj", "{B8E636E8-B130-42C2-A2D9-24E95AAB97AA}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DltNode.Blockchain", "DltNode.Blockchain\DltNode.Blockchain.csproj", "{15EB2A24-0420-4CB0-9D46-EE8E84534BF1}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DltNode.Blockchain", "DltNode.Blockchain\DltNode.Blockchain.csproj", "{15EB2A24-0420-4CB0-9D46-EE8E84534BF1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DltNode.Hash", "DltNode.Hash\DltNode.Hash.csproj", "{5E5F9D32-2481-4688-9C9C-0F9D2BCB6C67}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +23,10 @@ Global
 		{15EB2A24-0420-4CB0-9D46-EE8E84534BF1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{15EB2A24-0420-4CB0-9D46-EE8E84534BF1}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{15EB2A24-0420-4CB0-9D46-EE8E84534BF1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5E5F9D32-2481-4688-9C9C-0F9D2BCB6C67}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5E5F9D32-2481-4688-9C9C-0F9D2BCB6C67}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5E5F9D32-2481-4688-9C9C-0F9D2BCB6C67}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5E5F9D32-2481-4688-9C9C-0F9D2BCB6C67}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE