prevent dup wallets

Toolkit.Foundation/Result.cs

@@ -0,0 +1,14 @@
+namespace Toolkit.Foundation;
+
+public record Result<TValue> :
+    Result
+{
+    private readonly TValue? value;
+
+    protected internal Result(TValue? value, bool isSuccess, Error error)
+        : base(isSuccess, error) => this.value = value;
+
+    public TValue? Value => IsSuccess ? value! : default;
+
+    public static implicit operator Result<TValue>(TValue? value) => Create(value);
+}