Finish Riley's monster commit

3b38d725d7
May the Gods have mercy on my soul.

Shared/Errors/ALTWrappedError.m

@@ -0,0 +1,73 @@
+//
+//  ALTWrappedError.m
+//  AltStoreCore
+//
+//  Created by Riley Testut on 11/28/22.
+//  Copyright © 2022 Riley Testut. All rights reserved.
+//
+
+#import "ALTWrappedError.h"
+
+@implementation ALTWrappedError
+
++ (BOOL)supportsSecureCoding
+{
+    // Required in order to serialize errors for legacy AltServer communication.
+    return YES;
+}
+
+- (instancetype)initWithError:(NSError *)error userInfo:(NSDictionary<NSString *,id> *)userInfo
+{
+    self = [super initWithDomain:error.domain code:error.code userInfo:userInfo];
+    if (self)
+    {
+        if ([error isKindOfClass:[ALTWrappedError class]])
+        {
+            _wrappedError = [(ALTWrappedError *)error wrappedError];
+        }
+        else
+        {
+            _wrappedError = [error copy];
+        }
+    }
+
+    return self;
+}
+
+- (NSString *)localizedDescription
+{
+    NSString *localizedFailure = self.userInfo[NSLocalizedFailureErrorKey];
+    if (localizedFailure != nil)
+    {
+        NSString *wrappedLocalizedDescription = self.wrappedError.userInfo[NSLocalizedDescriptionKey];
+        NSString *localizedFailureReason = wrappedLocalizedDescription ?: self.wrappedError.localizedFailureReason ?: self.wrappedError.localizedDescription;
+
+        NSString *localizedDescription = [NSString stringWithFormat:@"%@ %@", localizedFailure, localizedFailureReason];
+        return localizedDescription;
+    }
+
+    // localizedFailure is nil, so return wrappedError's localizedDescription.
+    return self.wrappedError.localizedDescription;
+}
+
+- (NSString *)localizedFailureReason
+{
+    return self.wrappedError.localizedFailureReason;
+}
+
+- (NSString *)localizedRecoverySuggestion
+{
+    return self.wrappedError.localizedRecoverySuggestion;
+}
+
+- (NSString *)debugDescription
+{
+    return self.wrappedError.debugDescription;
+}
+
+- (NSString *)helpAnchor
+{
+    return self.wrappedError.helpAnchor;
+}
+
+@end