Create swift package

Sources/SideStoreCore/Model/RefreshAttempt.swift

@@ -0,0 +1,50 @@
+//
+//  RefreshAttempt.swift
+//  AltStore
+//
+//  Created by Riley Testut on 7/31/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import CoreData
+
+@objc(RefreshAttempt)
+public class RefreshAttempt: NSManagedObject, Fetchable {
+    @NSManaged public var identifier: String
+    @NSManaged public var date: Date
+
+    @NSManaged public var isSuccess: Bool
+    @NSManaged public var errorDescription: String?
+
+    override private init(entity: NSEntityDescription, insertInto context: NSManagedObjectContext?) {
+        super.init(entity: entity, insertInto: context)
+    }
+
+    public init(identifier: String, result: Result<[String: Result<InstalledApp, Error>], Error>, context: NSManagedObjectContext) {
+        super.init(entity: RefreshAttempt.entity(), insertInto: context)
+
+        self.identifier = identifier
+        date = Date()
+
+        do {
+            let results = try result.get()
+
+            for (_, result) in results {
+                guard case let .failure(error) = result else { continue }
+                throw error
+            }
+
+            isSuccess = true
+            errorDescription = nil
+        } catch {
+            isSuccess = false
+            errorDescription = error.localizedDescription
+        }
+    }
+}
+
+public extension RefreshAttempt {
+    @nonobjc class func fetchRequest() -> NSFetchRequest<RefreshAttempt> {
+        NSFetchRequest<RefreshAttempt>(entityName: "RefreshAttempt")
+    }
+}