From 6b2ec67b2c18928afadf20324b571cf6f480c301 Mon Sep 17 00:00:00 2001
From: Iain Shorter <iainshorter@gmail.com>
Date: Mon, 16 Sep 2024 17:04:04 +0000
Subject: [PATCH 1/2] add support for Error cause

---
 src/transformer.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/transformer.ts b/src/transformer.ts
index 70ac517..b7316e7 100644
--- a/src/transformer.ts
+++ b/src/transformer.ts
@@ -90,6 +90,7 @@ const simpleRules = [
       const baseError: any = {
         name: v.name,
         message: v.message,
+        cause: v.cause
       };
 
       superJson.allowedErrorProps.forEach(prop => {
@@ -99,7 +100,7 @@ const simpleRules = [
       return baseError;
     },
     (v, superJson) => {
-      const e = new Error(v.message);
+      const e = new Error(v.message, { cause: v.cause });
       e.name = v.name;
       e.stack = v.stack;
 

From 55ad71ceb29a3bfa9f51b2b717f7b93c1ca3807d Mon Sep 17 00:00:00 2001
From: Iain Shorter <iainshorter@gmail.com>
Date: Mon, 16 Sep 2024 17:30:49 +0000
Subject: [PATCH 2/2] change error to a "deep" type

---
 src/plainer.ts     | 2 ++
 src/transformer.ts | 3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/plainer.ts b/src/plainer.ts
index 114d76a..a78ba40 100644
--- a/src/plainer.ts
+++ b/src/plainer.ts
@@ -1,6 +1,7 @@
 import {
   isArray,
   isEmptyObject,
+  isError,
   isMap,
   isPlainObject,
   isPrimitive,
@@ -95,6 +96,7 @@ const isDeep = (object: any, superJson: SuperJSON): boolean =>
   isArray(object) ||
   isMap(object) ||
   isSet(object) ||
+  isError(object) ||
   isInstanceOfRegisteredClass(object, superJson);
 
 function addIdentity(object: any, path: any[], identities: Map<any, any[][]>) {
diff --git a/src/transformer.ts b/src/transformer.ts
index b7316e7..fba31be 100644
--- a/src/transformer.ts
+++ b/src/transformer.ts
@@ -23,7 +23,6 @@ type LeafTypeAnnotation =
   | PrimitiveTypeAnnotation
   | 'regexp'
   | 'Date'
-  | 'Error'
   | 'URL';
 
 type TypedArrayAnnotation = ['typed-array', string];
@@ -31,7 +30,7 @@ type ClassTypeAnnotation = ['class', string];
 type SymbolTypeAnnotation = ['symbol', string];
 type CustomTypeAnnotation = ['custom', string];
 
-type SimpleTypeAnnotation = LeafTypeAnnotation | 'map' | 'set';
+type SimpleTypeAnnotation = LeafTypeAnnotation | 'map' | 'set' | 'Error';
 
 type CompositeTypeAnnotation =
   | TypedArrayAnnotation