public extension Notification.Name {

    static let encryptingMessage = Notification.Name("encryptingMessage")
    static let calculatingMessagePoW = Notification.Name("calculatingPoW")
    static let messageSending = Notification.Name("messageSending")
    static let messageSent = Notification.Name("messageSent")
    static let messageSendingFailed = Notification.Name("messageSendingFailed")
}