Include Sha3 hashing library

src/SmartContract.Essentials/Hashing/Sha3Extensions.cs

@@ -0,0 +1,18 @@
+using SHA3.Net;
+using System.Text;
+
+namespace SmartContract.Essentials.Hashing
+{
+    public static class Sha3Extensions
+    {
+        /// <summary>
+        /// Computes the hash value for the specified string
+        /// </summary>
+        /// <exception cref="System.ArgumentNullException"></exception>
+        /// <exception cref="System.ObjectDisposedException"></exception>
+        public static byte[] ComputeHash(this Sha3 hasher, string value)
+        {
+            return hasher.ComputeHash(Encoding.UTF8.GetBytes(value));
+        }
+    }
+}

src/SmartContract.Essentials/SmartContract.Essentials.csproj

@@ -12,7 +12,11 @@
     <RepositoryUrl>https://github.com/drmathias/SmartContract.Essentials</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <PackageTags>blockchain encryption smart-contracts stratis neo</PackageTags>
-    <Version>1.0.2</Version>
+    <Version>1.0.3</Version>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="SHA3.Net" Version="1.2.2" />
+  </ItemGroup>
+
 </Project>