taking shape

Author: eduard-dumitru

src/CoreIpc.sln

@@ -13,6 +13,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UiPath.CoreIpc.Tests", "UiP
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{676A208A-2F08-4749-A833-F8D2BCB1B147}"
 	ProjectSection(SolutionItems) = preProject
+		Directory.Build.targets = Directory.Build.targets
 		NuGet.Config = NuGet.Config
 	EndProjectSection
 EndProject

src/Directory.Build.targets

@@ -0,0 +1,5 @@
+<Project>
+    <ItemGroup>
+        <PackageReference Update="Microsoft.IO.RecyclableMemoryStream" Version="2.2.0" />
+    </ItemGroup>
+</Project>

src/UiPath.CoreIpc/Dtos.cs

@@ -1,4 +1,5 @@
-using System.Text;
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
 using Newtonsoft.Json;
 namespace UiPath.CoreIpc;
 public class Message
@@ -45,7 +46,18 @@ public TResult Deserialize<TResult>(ISerializer serializer, bool objectParameter
 [Serializable]
 public record Error(string Message, string StackTrace, string Type, Error InnerError)
 {
+    [return: NotNullIfNotNull(nameof(exception))]
+    public static Error? FromException(Exception? exception)
+    => exception is null 
+        ? null 
+        : new(
+            Message: exception.Message, 
+            StackTrace: exception.StackTrace ?? exception.GetBaseException().StackTrace, 
+            Type: GetExceptionType(exception), 
+            InnerError: FromException(exception.InnerException));
     public override string ToString() => new RemoteException(this).ToString();
+
+    private static string GetExceptionType(Exception exception) => (exception as RemoteException)?.Type ?? exception.GetType().FullName;
 }
 [Serializable]
 public class RemoteException : Exception

src/UiPath.CoreIpc/Polyfills.cs

@@ -0,0 +1,30 @@
+#if NETFRAMEWORK
+
+namespace System.Diagnostics.CodeAnalysis;
+
+using static AttributeTargets;
+
+[ExcludeFromCodeCoverage]
+[DebuggerNonUserCode]
+[AttributeUsage(Parameter | Property | ReturnValue, AllowMultiple = true)]
+internal sealed class NotNullIfNotNullAttribute : Attribute
+{
+    /// <summary>
+    ///   Gets the associated parameter name.
+    ///   The output will be non-<see langword="null"/> if the argument to the
+    ///   parameter specified is non-<see langword="null"/>.
+    /// </summary>
+    public string ParameterName { get; }
+
+    /// <summary>
+    ///   Initializes the attribute with the associated parameter name.
+    /// </summary>
+    /// <param name="parameterName">
+    ///   The associated parameter name.
+    ///   The output will be non-<see langword="null"/> if the argument to the
+    ///   parameter specified is non-<see langword="null"/>.
+    /// </param>
+    public NotNullIfNotNullAttribute(string parameterName) =>
+        ParameterName = parameterName;
+}
+#endif

src/UiPath.CoreIpc/UiPath.CoreIpc.csproj

@@ -16,6 +16,7 @@
     <NoWarn>CA1416</NoWarn>
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>true</ImplicitUsings>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
   <ItemGroup Condition="$(TargetFramework) == 'net461'">
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
@@ -25,7 +26,7 @@
     <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">
       <_Parameter1>UiPath.CoreIpc.Tests</_Parameter1>
     </AssemblyAttribute>
-    <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" Version="2.2.1" />
+    <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.0" />