another.im-ios/ConversationsClassic/Helpers/UserDefaultsWrapper.swift

import Foundation

// Wrapper
@propertyWrapper
struct Storage<T> {
    private let key: String
    private let defaultValue: T

    init(key: String, defaultValue: T) {
        self.key = key
        self.defaultValue = defaultValue
    }

    var wrappedValue: T {
        get {
            // Read value from UserDefaults
            UserDefaults.standard.object(forKey: key) as? T ?? defaultValue
        }
        set {
            // Set value to UserDefaults
            UserDefaults.standard.set(newValue, forKey: key)
        }
    }
}

// Storage
private let kOmemoDeviceId = "conversations.classic.user.defaults.omemoDeviceId"

enum UserSettings {
    @Storage(key: kOmemoDeviceId, defaultValue: 0)
    static var omemoDeviceId: UInt32
}