From 8a01633e03c25a24fbd317487ed03422cd6b6da9 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Thu, 22 Mar 2018 19:12:43 +0300
Subject: [PATCH 01/12] Update for swift 4

---
 .../View/BasePassCodeViewController.swift     | 22 +++++++++----------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 5ad2563..ca8aacc 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
@@ -47,7 +47,7 @@ public enum PassCodeControllerState {
 }
 
 /// Base view controller that operates with pass code
-open class BasePassCodeViewController: UIViewController {
+open class BasePassCodeViewController: UIViewController, ConfigurableController {
 
     public var viewModel: BasePassCodeViewModel!
 
@@ -59,7 +59,7 @@ open class BasePassCodeViewController: UIViewController {
 
     public let disposeBag = DisposeBag()
 
-    fileprivate lazy var fakeTextField: UITextField = {
+    private lazy var fakeTextField: UITextField = {
         let fakeTextField = UITextField()
         fakeTextField.isSecureTextEntry = true
         fakeTextField.keyboardType = .numberPad
@@ -113,7 +113,7 @@ open class BasePassCodeViewController: UIViewController {
         resetDotsUI()
     }
 
-    fileprivate func resetDotsUI() {
+    private func resetDotsUI() {
         fakeTextField.text = nil
         dotStackView.arrangedSubviews
             .flatMap { $0 as? UIImageView }
@@ -129,7 +129,7 @@ open class BasePassCodeViewController: UIViewController {
         imageView.image = imageFor(type: state)
     }
 
-    fileprivate func setStates(for passCodeText: String) {
+    private func setStates(for passCodeText: String) {
         var statesArray: [PinImageType] = []
 
         for characterIndex in 0..<viewModel.passCodeConfiguration.passCodeCharactersNumber {
@@ -142,7 +142,7 @@ open class BasePassCodeViewController: UIViewController {
         }
     }
 
-    fileprivate func showTouchIdIfNeeded(with description: String) {
+    private func showTouchIdIfNeeded(with description: String) {
         guard viewModel.isTouchIdEnabled && viewModel.controllerType == .enter else {
             return
         }
@@ -154,7 +154,7 @@ open class BasePassCodeViewController: UIViewController {
         }
     }
 
-    fileprivate func resetUI() {
+    private func resetUI() {
         resetDotsUI()
         viewModel.reset()
     }
@@ -204,11 +204,7 @@ open class BasePassCodeViewController: UIViewController {
         titleLabel?.text = actionTitle(for: passCodeControllerState)
     }
 
-}
-
-// MARK: - ConfigurableController
-// We need to implement all functions of ConfigurableController protocol to give ability to override them.
-extension BasePassCodeViewController: ConfigurableController {
+    // MARK: - ConfigurableController
 
     open func bindViews() {
         fakeTextField.rx.text.asDriver()
@@ -251,6 +247,7 @@ extension BasePassCodeViewController: ConfigurableController {
 }
 
 // MARK: - UITextFieldDelegate
+
 extension BasePassCodeViewController: UITextFieldDelegate {
 
     public func textField(_ textField: UITextField,
@@ -262,3 +259,4 @@ extension BasePassCodeViewController: UITextFieldDelegate {
     }
 
 }
+

From 4861749415e28a36f1b8b560f2b76a75b64f5806 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Thu, 22 Mar 2018 19:49:53 +0300
Subject: [PATCH 02/12] Update configuration

---
 .../Model/PassCodeConfiguration.swift         | 20 ++++++++-----------
 .../View/BasePassCodeViewController.swift     |  4 ++--
 .../ViewModel/BasePassCodeViewModel.swift     | 17 ++++++++--------
 3 files changed, 18 insertions(+), 23 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
index d48d8e5..a8b5931 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
@@ -24,26 +24,22 @@
 public struct PassCodeConfiguration {
 
     /// Pass code length
-    public var passCodeCharactersNumber: UInt = 4
+    public let passCodeLength: Int
+
     /// Incorrect pass code attempts count
-    public var maxAttemptsLoginNumber: UInt = 5
+    public let maxAttemptsNumber: Int
 
     /// Clear input progress when application goes to background
-    public var shouldResetWhenGoBackground: Bool = true
+    public let shouldResetWhenGoBackground: Bool
 
-    private init() {}
-
-    init?(passCodeCharactersNumber: UInt) {
-        guard passCodeCharactersNumber > 0 else {
-            assertionFailure("passCodeCharactersNumber must be greater then 0")
-            return nil
-        }
-        self.passCodeCharactersNumber = passCodeCharactersNumber
+    public init(passCodeLength: Int = 4, maxAttemptsNumber: Int = 5, shouldResetWhenGoBackground: Bool = true) {
+        self.passCodeLength = passCodeLength
+        self.maxAttemptsNumber = maxAttemptsNumber
+        self.shouldResetWhenGoBackground = shouldResetWhenGoBackground
     }
 
     /// Returns configuration with default values
     public static var defaultConfiguration: PassCodeConfiguration {
         return PassCodeConfiguration()
     }
-
 }
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index ca8aacc..21d7877 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -102,7 +102,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
     private func initialDotNumberConfiguration() {
         dotStackView.arrangedSubviews.forEach { dotStackView.removeArrangedSubview($0) }
 
-        for _ in 0..<viewModel.passCodeConfiguration.passCodeCharactersNumber {
+        for _ in 0 ..< viewModel.passCodeConfiguration.passCodeLength {
             let dotImageView = UIImageView()
             dotImageView.translatesAutoresizingMaskIntoConstraints = false
             dotImageView.widthAnchor.constraint(equalTo: dotImageView.heightAnchor, multiplier: 1)
@@ -132,7 +132,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
     private func setStates(for passCodeText: String) {
         var statesArray: [PinImageType] = []
 
-        for characterIndex in 0..<viewModel.passCodeConfiguration.passCodeCharactersNumber {
+        for characterIndex in 0..<viewModel.passCodeConfiguration.passCodeLength {
             let state: PinImageType = Int(characterIndex) <= passCodeText.characters.count - 1 ? .entered : .clear
             statesArray.append(state)
         }
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index a9d42ec..b024f41 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -39,26 +39,25 @@ open class BasePassCodeViewModel: BaseViewModel {
 
     /// TouchId service, which can answer if user is authorized by finger
     public let touchIdService: TouchIDService?
+
     /// Contains configuration for pass code operations
     public let passCodeConfiguration: PassCodeConfiguration
 
-    fileprivate let validationResultHolder = Variable<PassCodeValidationResult?>(nil)
+    private let validationResultHolder = Variable<PassCodeValidationResult?>(nil)
     var validationResult: Driver<PassCodeValidationResult?> {
         return validationResultHolder.asDriver()
     }
 
-    fileprivate let passCodeControllerStateHolder = Variable<PassCodeControllerState>(.enter)
+    private let passCodeControllerStateHolder = Variable<PassCodeControllerState>(.enter)
     public var passCodeControllerState: Driver<PassCodeControllerState> {
         return passCodeControllerStateHolder.asDriver()
     }
 
     private let passCodeText = Variable<String?>(nil)
 
-    fileprivate var attemptsNumber = 0
+    private var attemptsNumber = 0
 
-    fileprivate lazy var passCodeHolder: PassCodeHolderProtocol = {
-        return PassCodeHolderBuilder.build(with: self.controllerType)
-    }()
+    private lazy var passCodeHolder: PassCodeHolderProtocol = PassCodeHolderBuilder.build(with: self.controllerType)
 
     public init(controllerType: PassCodeControllerType,
                 passCodeConfiguration: PassCodeConfiguration,
@@ -76,7 +75,7 @@ open class BasePassCodeViewModel: BaseViewModel {
             .distinctUntilChanged { $0 == $1 }
             .drive(onNext: { [weak self] passCode in
                 if let passCode = passCode,
-                    passCode.characters.count == Int(self?.passCodeConfiguration.passCodeCharactersNumber ?? 0) {
+                    passCode.characters.count == Int(self?.passCodeConfiguration.passCodeLength ?? 0) {
                     self?.set(passCode: passCode)
                 }
             })
@@ -184,8 +183,8 @@ extension BasePassCodeViewModel {
                 validationResult = .inValid(.wrongCode)
             }
 
-            if (!validationResult.isValid && attemptsNumber == Int(passCodeConfiguration.maxAttemptsLoginNumber)) ||
-                attemptsNumber > Int(passCodeConfiguration.maxAttemptsLoginNumber) {
+            if (!validationResult.isValid && attemptsNumber == Int(passCodeConfiguration.maxAttemptsNumber)) ||
+                attemptsNumber > Int(passCodeConfiguration.maxAttemptsNumber) {
                 validationResult = .inValid(.tooManyAttempts)
             }
         }

From ce2c69e854fc0c7cdd664f00b331582d0781f50e Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 12:48:36 +0300
Subject: [PATCH 03/12] Passcode refactoring & improvements

---
 .../View/BasePassCodeViewController.swift     | 17 +++++++++----
 .../Services/BasePassCodeService.swift        | 25 ++++++++-----------
 2 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 21d7877..5d45e8c 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -76,11 +76,22 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
 
         initialLoadView()
         initialDotNumberConfiguration()
-        enebleKeyboard()
         configureBackgroundNotifications()
         showTouchIdIfNeeded(with: touchIdHint)
     }
 
+    override open func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+
+        fakeTextField.becomeFirstResponder()
+    }
+
+    override open func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        fakeTextField.resignFirstResponder()
+    }
+
     // MARK: - Private functions
 
     private func configureBackgroundNotifications() {
@@ -95,10 +106,6 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
             .disposed(by: disposeBag)
     }
 
-    private func enebleKeyboard() {
-        fakeTextField.becomeFirstResponder()
-    }
-
     private func initialDotNumberConfiguration() {
         dotStackView.arrangedSubviews.forEach { dotStackView.removeArrangedSubview($0) }
 
diff --git a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
index 5892a7c..53ce561 100644
--- a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
+++ b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
@@ -28,7 +28,7 @@ import IDZSwiftCommonCrypto
 open class BasePassCodeService {
 
     /// Override to set specific keychain service name
-    open class var keychainService: String {
+    open class var keychainServiceString: String {
         return Bundle.main.bundleIdentifier ?? ""
     }
 
@@ -42,37 +42,34 @@ open class BasePassCodeService {
 
     // MARK: - Private stuff
 
-    fileprivate lazy var keychain: Keychain = {
-        return Keychain(service: BasePassCodeService.keychainService)
-            .synchronizable(false)
-    }()
+    private lazy var keychain = Keychain(service: BasePassCodeService.keychainServiceString).synchronizable(false)
 
-    fileprivate var passCodeHash: String? {
+    private var passCodeHash: String? {
         return keychain[Keys.passCodeHash]
     }
 
-    fileprivate enum Keys {
+    private enum Keys {
         static let passCodeHash     = "passCodeHash"
         static let isTouchIdEnabled = "isTouchIdEnabled"
         static let isInitialLoad    = "isInitialLoad"
     }
 
-    fileprivate enum Values {
+    private enum Values {
         static let touchIdEnabled = "touchIdEnabled"
         static let initialLoad = "initialLoad"
     }
 
 }
 
-extension BasePassCodeService {
+public extension BasePassCodeService {
 
     /// Indicates is pass code already saved on this device
-    public var isPassCodeSaved: Bool {
+    var isPassCodeSaved: Bool {
         return keychain[Keys.passCodeHash] != nil
     }
 
     /// Indicates is it possible to authenticate on this device via touch id
-    public var isTouchIdEnabled: Bool {
+    var isTouchIdEnabled: Bool {
         get {
             return keychain[Keys.isTouchIdEnabled] == Values.touchIdEnabled
         }
@@ -82,7 +79,7 @@ extension BasePassCodeService {
     }
 
     /// Saves new pass code
-    public func save(passCode: String?) {
+    func save(passCode: String?) {
         if let passCode = passCode {
             keychain[Keys.passCodeHash] = sha256(passCode)
         } else {
@@ -91,12 +88,12 @@ extension BasePassCodeService {
     }
 
     /// Check if pass code is correct
-    public func check(passCode: String) -> Bool {
+    func check(passCode: String) -> Bool {
         return sha256(passCode) == passCodeHash
     }
 
     /// Reset pass code settings
-    public func reset() {
+    func reset() {
         save(passCode: nil)
         isTouchIdEnabled = false
     }

From 7b6e73e789c3422f592d05c22451164c17d0c277 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 15:21:12 +0300
Subject: [PATCH 04/12] Update name & refactor error

---
 .../Sources/Classes/ApiResponse.swift         |  2 +-
 .../Sources/Classes/BaseDateFormatter.swift   |  2 +-
 .../Sources/Classes/LoadingBarButton.swift    |  2 +-
 .../Model/PassCodeConfiguration.swift         |  2 +-
 .../PassCode/Model/PassCodeError.swift        |  2 +-
 .../PassCode/Model/PassCodeHolder.swift       |  8 +++----
 .../Model/PassCodeHolderProtocol.swift        |  2 +-
 .../Model/PassCodeValidationResult.swift      | 22 ++++++++++---------
 .../ViewModel/BasePassCodeViewModel.swift     |  6 ++---
 LeadKitAdditions/Sources/Enums/ApiError.swift |  2 +-
 .../Sources/Enums/ApiErrorProtocol.swift      |  2 +-
 .../Extensions/Observable+Extensions.swift    |  2 +-
 .../UIBarButtonItem+Extensions.swift          |  2 +-
 .../Extensions/UserDefaults+UserService.swift |  2 +-
 .../Services/BasePassCodeService.swift        |  2 +-
 .../Sources/Services/BaseUserService.swift    |  2 +-
 .../Services/Network/ApiNetworkService.swift  |  2 +-
 ...aultNetworkService+ActivityIndicator.swift |  2 +-
 .../Network/DefaultNetworkService.swift       |  2 +-
 .../Sources/Services/TouchIDService.swift     |  2 +-
 20 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/LeadKitAdditions/Sources/Classes/ApiResponse.swift b/LeadKitAdditions/Sources/Classes/ApiResponse.swift
index 98773b5..6a98860 100644
--- a/LeadKitAdditions/Sources/Classes/ApiResponse.swift
+++ b/LeadKitAdditions/Sources/Classes/ApiResponse.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Classes/BaseDateFormatter.swift b/LeadKitAdditions/Sources/Classes/BaseDateFormatter.swift
index 3bdf9ae..cec812c 100644
--- a/LeadKitAdditions/Sources/Classes/BaseDateFormatter.swift
+++ b/LeadKitAdditions/Sources/Classes/BaseDateFormatter.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Classes/LoadingBarButton.swift b/LeadKitAdditions/Sources/Classes/LoadingBarButton.swift
index 2d7a7a9..5db8b52 100644
--- a/LeadKitAdditions/Sources/Classes/LoadingBarButton.swift
+++ b/LeadKitAdditions/Sources/Classes/LoadingBarButton.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
index a8b5931..4d9bc18 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeConfiguration.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
index 6e766af..64b3de4 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolder.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolder.swift
index 4dae8fc..aac5919 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolder.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolder.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
@@ -81,7 +81,7 @@ public class PassCodeHolderCreate: PassCodeHolderProtocol {
         if let passCode = passCode {
             return .valid(passCode)
         } else {
-            return .inValid(.codesNotMatch)
+            return .invalid(.codesNotMatch)
         }
     }
 
@@ -112,7 +112,7 @@ public class PassCodeHolderEnter: PassCodeHolderProtocol {
         if let passCode = passCode {
             return .valid(passCode)
         } else {
-            return .inValid(nil)
+            return .invalid(nil)
         }
     }
 
@@ -178,7 +178,7 @@ public class PassCodeHolderChange: PassCodeHolderProtocol {
         if let passCode = passCode {
             return .valid(passCode)
         } else {
-            return .inValid(enterStep == .newEnter ? nil : .codesNotMatch)
+            return .invalid(enterStep == .newEnter ? nil : .codesNotMatch)
         }
     }
 
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolderProtocol.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolderProtocol.swift
index b4a031d..d8bcf6c 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolderProtocol.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeHolderProtocol.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
index 41bdbd1..1cede03 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
@@ -24,33 +24,35 @@
 public enum PassCodeValidationResult {
 
     case valid(String)
-    case inValid(PassCodeError?)
+    case invalid(PassCodeError?)
 
-    public var isValid: Bool {
+}
+
+public extension PassCodeValidationResult {
+    var isValid: Bool {
         switch self {
         case .valid:
             return true
-        default:
+        case .invalid(_):
             return false
         }
     }
 
-    public var passCode: String? {
+    var passCode: String? {
         switch self {
         case let .valid(passCode):
             return passCode
-        default:
+        case .invalid(_):
             return nil
         }
     }
 
-    public var error: PassCodeError? {
+    var error: PassCodeError? {
         switch self {
-        case let .inValid(error):
+        case let .invalid(error):
             return error
-        default:
+        case .valid(_):
             return nil
         }
     }
-
 }
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index b024f41..2e4245a 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
@@ -180,12 +180,12 @@ extension BasePassCodeViewModel {
             attemptsNumber += 1
 
             if let passCode = validationResult.passCode, !isEnteredPassCodeValid(passCode) {
-                validationResult = .inValid(.wrongCode)
+                validationResult = .invalid(.wrongCode)
             }
 
             if (!validationResult.isValid && attemptsNumber == Int(passCodeConfiguration.maxAttemptsNumber)) ||
                 attemptsNumber > Int(passCodeConfiguration.maxAttemptsNumber) {
-                validationResult = .inValid(.tooManyAttempts)
+                validationResult = .invalid(.tooManyAttempts)
             }
         }
 
diff --git a/LeadKitAdditions/Sources/Enums/ApiError.swift b/LeadKitAdditions/Sources/Enums/ApiError.swift
index bb4533e..aff43d1 100644
--- a/LeadKitAdditions/Sources/Enums/ApiError.swift
+++ b/LeadKitAdditions/Sources/Enums/ApiError.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Enums/ApiErrorProtocol.swift b/LeadKitAdditions/Sources/Enums/ApiErrorProtocol.swift
index 31b0113..f94a9a8 100644
--- a/LeadKitAdditions/Sources/Enums/ApiErrorProtocol.swift
+++ b/LeadKitAdditions/Sources/Enums/ApiErrorProtocol.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift b/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
index c6dbe09..c854ee9 100644
--- a/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
+++ b/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Extensions/UIBarButtonItem+Extensions.swift b/LeadKitAdditions/Sources/Extensions/UIBarButtonItem+Extensions.swift
index ef3eaf7..f237bf2 100644
--- a/LeadKitAdditions/Sources/Extensions/UIBarButtonItem+Extensions.swift
+++ b/LeadKitAdditions/Sources/Extensions/UIBarButtonItem+Extensions.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Extensions/UserDefaults+UserService.swift b/LeadKitAdditions/Sources/Extensions/UserDefaults+UserService.swift
index 6ca694f..39ffd95 100644
--- a/LeadKitAdditions/Sources/Extensions/UserDefaults+UserService.swift
+++ b/LeadKitAdditions/Sources/Extensions/UserDefaults+UserService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
index 53ce561..a7a9c67 100644
--- a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
+++ b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/BaseUserService.swift b/LeadKitAdditions/Sources/Services/BaseUserService.swift
index 016b749..2fa1606 100644
--- a/LeadKitAdditions/Sources/Services/BaseUserService.swift
+++ b/LeadKitAdditions/Sources/Services/BaseUserService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/Network/ApiNetworkService.swift b/LeadKitAdditions/Sources/Services/Network/ApiNetworkService.swift
index 2293906..f30065f 100644
--- a/LeadKitAdditions/Sources/Services/Network/ApiNetworkService.swift
+++ b/LeadKitAdditions/Sources/Services/Network/ApiNetworkService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService+ActivityIndicator.swift b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService+ActivityIndicator.swift
index abe2e32..28f5aa1 100644
--- a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService+ActivityIndicator.swift
+++ b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService+ActivityIndicator.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
index 54d8c2f..b64d9c0 100644
--- a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
+++ b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal
diff --git a/LeadKitAdditions/Sources/Services/TouchIDService.swift b/LeadKitAdditions/Sources/Services/TouchIDService.swift
index 4dfaab2..69e6325 100644
--- a/LeadKitAdditions/Sources/Services/TouchIDService.swift
+++ b/LeadKitAdditions/Sources/Services/TouchIDService.swift
@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Touch Instinct
+//  Copyright (c) 2018 Touch Instinct
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the Software), to deal

From 27f42e55a1dbb10f8fdaa475b31d29cc3a913e47 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 15:52:34 +0300
Subject: [PATCH 05/12] Rename to biometrics

---
 .../View/BasePassCodeViewController.swift     |  6 ++--
 .../ViewModel/BasePassCodeViewModel.swift     | 14 ++++-----
 .../Services/BasePassCodeService.swift        | 30 ++++++++++---------
 3 files changed, 26 insertions(+), 24 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 5d45e8c..b246456 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -77,7 +77,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
         initialLoadView()
         initialDotNumberConfiguration()
         configureBackgroundNotifications()
-        showTouchIdIfNeeded(with: touchIdHint)
+        showBiometricsRequestIfNeeded(with: touchIdHint)
     }
 
     override open func viewWillAppear(_ animated: Bool) {
@@ -149,8 +149,8 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
         }
     }
 
-    private func showTouchIdIfNeeded(with description: String) {
-        guard viewModel.isTouchIdEnabled && viewModel.controllerType == .enter else {
+    private func showBiometricsRequestIfNeeded(with description: String) {
+        guard viewModel.isBiometricsEnabled && viewModel.controllerType == .enter else {
             return
         }
 
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index 2e4245a..505c715 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -138,23 +138,23 @@ open class BasePassCodeViewModel: BaseViewModel {
         assertionFailure("You should override this method: authSucceed(_ type: PassCodeAuthType)")
     }
 
-    // MARK: - Functions that can you can override to use TouchId
+    // MARK: - Biometrics
 
-    /// Override to be able use touchId during authentication
-    open var isTouchIdEnabled: Bool {
+    /// Posibility to use biometrics for authentication
+    open var isBiometricsEnabled: Bool {
         return false
     }
 
-    /// You should save user choice about authenticate by touchId
-    open func activateTouchIdForUser() {
-        assertionFailure("You should override this method: activateTouchIdForUser()")
+    /// Notify about activation for biometrics. Remember to save user choice
+    open func activateBiometricsForUser() {
+        assertionFailure("You should override this method: activateBiometricsForUser()")
     }
 
 }
 
 extension BasePassCodeViewModel {
 
-    fileprivate func set(passCode: String) {
+    private func set(passCode: String) {
         passCodeHolder.add(passCode: passCode)
         validateIfNeeded()
 
diff --git a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
index a7a9c67..b79d6ea 100644
--- a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
+++ b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
@@ -24,6 +24,17 @@ import KeychainAccess
 import CocoaLumberjack
 import IDZSwiftCommonCrypto
 
+private enum Keys {
+    static let passCodeHash        = "passCodeHashKey"
+    static let isBiometricsEnabled = "isBiometricsEnabledKey"
+    static let isInitialLoad       = "isInitialLoadKey"
+}
+
+private enum Values {
+    static let biometricsEnabled = "biometricsEnabled"
+    static let initialLoad       = "initialLoad"
+}
+
 /// Represents base pass code service which encapsulates pass code storing
 open class BasePassCodeService {
 
@@ -48,16 +59,7 @@ open class BasePassCodeService {
         return keychain[Keys.passCodeHash]
     }
 
-    private enum Keys {
-        static let passCodeHash     = "passCodeHash"
-        static let isTouchIdEnabled = "isTouchIdEnabled"
-        static let isInitialLoad    = "isInitialLoad"
-    }
 
-    private enum Values {
-        static let touchIdEnabled = "touchIdEnabled"
-        static let initialLoad = "initialLoad"
-    }
 
 }
 
@@ -68,13 +70,13 @@ public extension BasePassCodeService {
         return keychain[Keys.passCodeHash] != nil
     }
 
-    /// Indicates is it possible to authenticate on this device via touch id
-    var isTouchIdEnabled: Bool {
+    /// Possibility to authenticate via biometrics. TouchID or FaceID
+    var isBiometricsAuthorizationEnabled: Bool {
         get {
-            return keychain[Keys.isTouchIdEnabled] == Values.touchIdEnabled
+            return keychain[Keys.isBiometricsEnabled] == Values.biometricsEnabled
         }
         set {
-            keychain[Keys.isTouchIdEnabled] = newValue ? Values.touchIdEnabled : nil
+            keychain[Keys.isBiometricsEnabled] = newValue ? Values.biometricsEnabled : nil
         }
     }
 
@@ -95,7 +97,7 @@ public extension BasePassCodeService {
     /// Reset pass code settings
     func reset() {
         save(passCode: nil)
-        isTouchIdEnabled = false
+        isBiometricsAuthorizationEnabled = false
     }
 
 }

From f612914307aef71f26d0386aecc0f6344ed56359 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 16:37:03 +0300
Subject: [PATCH 06/12] Rename TouchID to biometrics

---
 .../View/BasePassCodeViewController.swift     |  6 +----
 .../ViewModel/BasePassCodeViewModel.swift     | 27 +++++++++++++------
 .../Services/BasePassCodeService.swift        |  2 --
 ...DService.swift => BiometricsService.swift} | 22 +++++++--------
 4 files changed, 29 insertions(+), 28 deletions(-)
 rename LeadKitAdditions/Sources/Services/{TouchIDService.swift => BiometricsService.swift} (74%)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index b246456..5830e59 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -154,11 +154,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
             return
         }
 
-        viewModel.touchIdService?.authenticateByTouchId(description: description) { [weak self] isSuccess in
-            if isSuccess {
-                self?.viewModel.authSucceed(.touchId)
-            }
-        }
+        viewModel.authenticateUsingBiometrics(with: description)
     }
 
     private func resetUI() {
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index 505c715..eedffb5 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -37,8 +37,8 @@ open class BasePassCodeViewModel: BaseViewModel {
 
     public let disposeBag = DisposeBag()
 
-    /// TouchId service, which can answer if user is authorized by finger
-    public let touchIdService: TouchIDService?
+    /// Service that can answer if user is authorized by biometrics
+    public let biometricsService = BiometricsService()
 
     /// Contains configuration for pass code operations
     public let passCodeConfiguration: PassCodeConfiguration
@@ -59,13 +59,9 @@ open class BasePassCodeViewModel: BaseViewModel {
 
     private lazy var passCodeHolder: PassCodeHolderProtocol = PassCodeHolderBuilder.build(with: self.controllerType)
 
-    public init(controllerType: PassCodeControllerType,
-                passCodeConfiguration: PassCodeConfiguration,
-                touchIdService: TouchIDService? = nil) {
-
+    public init(controllerType: PassCodeControllerType, passCodeConfiguration: PassCodeConfiguration) {
         self.controllerType = controllerType
         self.passCodeConfiguration = passCodeConfiguration
-        self.touchIdService = touchIdService
 
         bindViewModel()
     }
@@ -125,6 +121,16 @@ open class BasePassCodeViewModel: BaseViewModel {
         passCodeHolder.reset()
     }
 
+    public func authenticateUsingBiometrics(with description: String) {
+        biometricsService.authenticateWithBiometrics(with: description) { [weak self] success, error in
+            if success {
+                self?.authSucceed(.touchId)
+            } else {
+                self?.authFailed(with: error)
+            }
+        }
+    }
+
     // MARK: - HAVE TO OVERRIDE
 
     /// Override to check if entered pass code is equal to stored
@@ -133,11 +139,16 @@ open class BasePassCodeViewModel: BaseViewModel {
         return false
     }
 
-    /// Handler called after successful authentication
+    /// Method is called after successful authentication
     open func authSucceed(_ type: PassCodeAuthType) {
         assertionFailure("You should override this method: authSucceed(_ type: PassCodeAuthType)")
     }
 
+    /// Called when authentication failed
+    open func authFailed(with: Error?) {
+        assertionFailure("You should override this method: authFailed(with: Error)")
+    }
+
     // MARK: - Biometrics
 
     /// Posibility to use biometrics for authentication
diff --git a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
index b79d6ea..8686b1c 100644
--- a/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
+++ b/LeadKitAdditions/Sources/Services/BasePassCodeService.swift
@@ -59,8 +59,6 @@ open class BasePassCodeService {
         return keychain[Keys.passCodeHash]
     }
 
-
-
 }
 
 public extension BasePassCodeService {
diff --git a/LeadKitAdditions/Sources/Services/TouchIDService.swift b/LeadKitAdditions/Sources/Services/BiometricsService.swift
similarity index 74%
rename from LeadKitAdditions/Sources/Services/TouchIDService.swift
rename to LeadKitAdditions/Sources/Services/BiometricsService.swift
index 69e6325..925cb61 100644
--- a/LeadKitAdditions/Sources/Services/TouchIDService.swift
+++ b/LeadKitAdditions/Sources/Services/BiometricsService.swift
@@ -22,34 +22,30 @@
 
 import LocalAuthentication
 
-public typealias TouchIDServiceAuthHandler = (Bool) -> Void
+public typealias BiometricsAuthHandler = (Bool, Error?) -> Void
 
-/// Represents service that provides access to authentication via touch id
-public class TouchIDService {
+/// Service that provide access to authentication via biometric
+public final class BiometricsService {
 
-    private lazy var laContext: LAContext = {
-        return LAContext()
-    }()
+    private lazy var laContext = LAContext()
 
     public init() {}
 
     /// Indicates is it possible to authenticate on this device via touch id
-    public var canAuthenticateByTouchId: Bool {
+    public var canAuthenticateWithBiometrics: Bool {
         return laContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
     }
 
     /**
-     Initiates system touch id authentication process
+     Initiates system biometrics authentication process
 
       - parameters:
         - description: prompt on the system alert that describes what for user should attach finger to device
         - authHandler: callback, with parameter, indicates if user authenticate successfuly
      */
-    public func authenticateByTouchId(description: String, authHandler: @escaping TouchIDServiceAuthHandler) {
-        laContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics,
-                                 localizedReason: description) { success, _ in
-
-            authHandler(success)
+    public func authenticateWithBiometrics(with description: String, authHandler: @escaping BiometricsAuthHandler) {
+        laContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: description) { success, error in
+            authHandler(success, error)
         }
     }
 

From 8bba538e4aac95c70ca48316a5708805ab820f87 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 17:40:19 +0300
Subject: [PATCH 07/12] Renamification & configuration

---
 .../View/BasePassCodeViewController.swift        |  4 ++--
 .../Sources/Services/BiometricsService.swift     | 16 +++++++++++++---
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 5830e59..8049467 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -77,7 +77,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
         initialLoadView()
         initialDotNumberConfiguration()
         configureBackgroundNotifications()
-        showBiometricsRequestIfNeeded(with: touchIdHint)
+        showBiometricsRequestIfNeeded(with: biometricsAuthorizationHint)
     }
 
     override open func viewWillAppear(_ animated: Bool) {
@@ -165,7 +165,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
     // MARK: - HAVE TO OVERRIDE
 
     /// Returns prompt that appears on touch id system alert
-    open var touchIdHint: String {
+    open var biometricsAuthorizationHint: String {
         assertionFailure("You should override this var: touchIdHint")
         return ""
     }
diff --git a/LeadKitAdditions/Sources/Services/BiometricsService.swift b/LeadKitAdditions/Sources/Services/BiometricsService.swift
index 925cb61..c22b281 100644
--- a/LeadKitAdditions/Sources/Services/BiometricsService.swift
+++ b/LeadKitAdditions/Sources/Services/BiometricsService.swift
@@ -24,13 +24,13 @@ import LocalAuthentication
 
 public typealias BiometricsAuthHandler = (Bool, Error?) -> Void
 
+
+
 /// Service that provide access to authentication via biometric
 public final class BiometricsService {
 
     private lazy var laContext = LAContext()
 
-    public init() {}
-
     /// Indicates is it possible to authenticate on this device via touch id
     public var canAuthenticateWithBiometrics: Bool {
         return laContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
@@ -43,7 +43,17 @@ public final class BiometricsService {
         - description: prompt on the system alert that describes what for user should attach finger to device
         - authHandler: callback, with parameter, indicates if user authenticate successfuly
      */
-    public func authenticateWithBiometrics(with description: String, authHandler: @escaping BiometricsAuthHandler) {
+    public func authenticateWithBiometrics(with description: String,
+                                           fallback fallbackTitle: String? = nil,
+                                           cancel cancelTitle: String? = nil,
+                                           authHandler: @escaping BiometricsAuthHandler) {
+        if #available(iOS 10.0, *), let cancel = cancelTitle {
+            laContext.localizedCancelTitle = cancelTitle
+        }
+        if let fallback = fallbackTitle {
+            laContext.localizedFallbackTitle = fallbackTitle
+        }
+
         laContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: description) { success, error in
             authHandler(success, error)
         }

From 9baa92a303b08f355e520629709c1a8632d9c5c4 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Fri, 23 Mar 2018 20:00:46 +0300
Subject: [PATCH 08/12] Add attempt index

---
 .../PassCode/Model/PassCodeError.swift        | 16 +++++-
 .../View/BasePassCodeViewController.swift     |  4 +-
 .../ViewModel/BasePassCodeViewModel.swift     | 53 ++++++++++---------
 3 files changed, 45 insertions(+), 28 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
index 64b3de4..ca7ebed 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeError.swift
@@ -21,8 +21,22 @@
 //
 
 /// Describes error, which may occur during pass code entering
+/// - codesNotMatch: Different codes
+/// - wrongCode: Value is remaining attemps
+/// - tooManyAttempts: Attempts limit reached
 public enum PassCodeError: Error {
     case codesNotMatch
-    case wrongCode
+    case wrongCode(Int)
     case tooManyAttempts
 }
+
+public extension PassCodeError {
+    var isTooManyAttempts: Bool {
+        switch self {
+        case .tooManyAttempts:
+            return true
+        default:
+            return false
+        }
+    }
+}
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 8049467..6fee439 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -226,8 +226,8 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
 
                 if validationResult.isValid {
                     self?.hideError()
-                } else if let pasCodeError = validationResult.error {
-                    self?.showError(for: pasCodeError)
+                } else if let passCodeError = validationResult.error {
+                    self?.showError(for: passCodeError)
                 }
             })
             .disposed(by: disposeBag)
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index eedffb5..b64955d 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -77,29 +77,8 @@ open class BasePassCodeViewModel: BaseViewModel {
             })
             .disposed(by: disposeBag)
 
-        validationResultHolder.asDriver()
-            .drive(onNext: { [weak self] validationResult in
-                guard let sSelf = self else {
-                    return
-                }
-
-                if sSelf.passCodeHolder.type == .change {
-                    if validationResult?.isValid ?? false,
-                        sSelf.passCodeHolder.enterStep == .repeatEnter,
-                        let passCode = validationResult?.passCode {
-
-                        sSelf.authSucceed(.passCode(passCode))
-                    } else {
-                        sSelf.passCodeControllerStateHolder.value = sSelf.passCodeHolder.enterStep
-                    }
-                } else {
-                    if validationResult?.isValid ?? false, let passCode = validationResult?.passCode {
-                        sSelf.authSucceed(.passCode(passCode))
-                    } else {
-                        sSelf.passCodeControllerStateHolder.value = sSelf.passCodeHolder.enterStep
-                    }
-                }
-            })
+        validationResultHolder.asObservable()
+            .bind(to: validationResultBinder)
             .disposed(by: disposeBag)
     }
 
@@ -163,6 +142,29 @@ open class BasePassCodeViewModel: BaseViewModel {
 
 }
 
+private extension BasePassCodeViewModel {
+    var validationResultBinder: Binder<PassCodeValidationResult?> {
+        return Binder(self) { model, validationResult in
+            let isValid = validationResult?.isValid ?? false
+            let passCode = validationResult?.passCode
+
+            if model.passCodeHolder.type == .change {
+                if isValid, model.passCodeHolder.enterStep == .repeatEnter, let passCode = passCode {
+                    model.authSucceed(.passCode(passCode))
+                } else {
+                    model.passCodeControllerStateHolder.value = model.passCodeHolder.enterStep
+                }
+            } else {
+                if isValid, let passCode = passCode {
+                    model.authSucceed(.passCode(passCode))
+                } else {
+                    model.passCodeControllerStateHolder.value = model.passCodeHolder.enterStep
+                }
+            }
+        }
+    }
+}
+
 extension BasePassCodeViewModel {
 
     private func set(passCode: String) {
@@ -177,7 +179,7 @@ extension BasePassCodeViewModel {
     private var shouldUpdateControllerState: Bool {
         return !passCodeHolder.shouldValidate ||
             !(validationResultHolder.value?.isValid ?? true) ||
-            validationResultHolder.value?.error == .tooManyAttempts
+            validationResultHolder.value?.error?.isTooManyAttempts ?? false
     }
 
     private func validateIfNeeded() {
@@ -191,7 +193,8 @@ extension BasePassCodeViewModel {
             attemptsNumber += 1
 
             if let passCode = validationResult.passCode, !isEnteredPassCodeValid(passCode) {
-                validationResult = .invalid(.wrongCode)
+                assert(passCodeConfiguration.maxAttemptsNumber > attemptsNumber)
+                validationResult = .invalid(.wrongCode(passCodeConfiguration.maxAttemptsNumber - attemptsNumber))
             }
 
             if (!validationResult.isValid && attemptsNumber == Int(passCodeConfiguration.maxAttemptsNumber)) ||

From 5d9a456d1d882dce503a3cc928cad3e567d18f35 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Mon, 26 Mar 2018 13:33:04 +0300
Subject: [PATCH 09/12] Code review notes

---
 .../PassCode/Model/PassCodeValidationResult.swift           | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
index 1cede03..f918a6d 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/Model/PassCodeValidationResult.swift
@@ -33,7 +33,7 @@ public extension PassCodeValidationResult {
         switch self {
         case .valid:
             return true
-        case .invalid(_):
+        case .invalid:
             return false
         }
     }
@@ -42,7 +42,7 @@ public extension PassCodeValidationResult {
         switch self {
         case let .valid(passCode):
             return passCode
-        case .invalid(_):
+        case .invalid:
             return nil
         }
     }
@@ -51,7 +51,7 @@ public extension PassCodeValidationResult {
         switch self {
         case let .invalid(error):
             return error
-        case .valid(_):
+        case .valid:
             return nil
         }
     }

From e602c1db599e765aaf01e2cdc48b50bf488441cf Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Mon, 26 Mar 2018 14:11:46 +0300
Subject: [PATCH 10/12] Update logic

---
 .../View/BasePassCodeViewController.swift     |  8 ++++----
 .../ViewModel/BasePassCodeViewModel.swift     | 19 ++++++++++---------
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
index 6fee439..e441d32 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/View/BasePassCodeViewController.swift
@@ -177,9 +177,9 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
     }
 
     /// Override to change error description
-    open func errorDescription(for error: PassCodeError) -> String {
+    open func errorDescription(for error: PassCodeError) -> NSAttributedString? {
         assertionFailure("You should override this method: errorDescription(for error: PassCodeError)")
-        return ""
+        return nil
     }
 
     /// Override to change action title text
@@ -192,7 +192,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
 
     /// Call to show error
     open func showError(for error: PassCodeError) {
-        errorLabel?.text = errorDescription(for: error)
+        errorLabel?.attributedText = errorDescription(for: error)
         errorLabel?.isHidden = false
     }
 
@@ -232,7 +232,7 @@ open class BasePassCodeViewController: UIViewController, ConfigurableController
             })
             .disposed(by: disposeBag)
 
-        viewModel.passCodeControllerState
+        viewModel.passCodeControllerStateDriver
             .drive(onNext: { [weak self] controllerState in
                 self?.configureUI(for: controllerState)
             })
diff --git a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
index b64955d..68952ff 100644
--- a/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
+++ b/LeadKitAdditions/Sources/Controllers/PassCode/ViewModel/BasePassCodeViewModel.swift
@@ -48,9 +48,9 @@ open class BasePassCodeViewModel: BaseViewModel {
         return validationResultHolder.asDriver()
     }
 
-    private let passCodeControllerStateHolder = Variable<PassCodeControllerState>(.enter)
-    public var passCodeControllerState: Driver<PassCodeControllerState> {
-        return passCodeControllerStateHolder.asDriver()
+    private let passCodeControllerStateVariable = Variable<PassCodeControllerState>(.enter)
+    public var passCodeControllerStateDriver: Driver<PassCodeControllerState> {
+        return passCodeControllerStateVariable.asDriver()
     }
 
     private let passCodeText = Variable<String?>(nil)
@@ -95,7 +95,7 @@ open class BasePassCodeViewModel: BaseViewModel {
     public func reset() {
         passCodeText.value = nil
         validationResultHolder.value = nil
-        passCodeControllerStateHolder.value = controllerType == .change ? .oldEnter : .enter
+        passCodeControllerStateVariable.value = controllerType == .change ? .oldEnter : .enter
         attemptsNumber = 0
         passCodeHolder.reset()
     }
@@ -152,13 +152,13 @@ private extension BasePassCodeViewModel {
                 if isValid, model.passCodeHolder.enterStep == .repeatEnter, let passCode = passCode {
                     model.authSucceed(.passCode(passCode))
                 } else {
-                    model.passCodeControllerStateHolder.value = model.passCodeHolder.enterStep
+                    model.passCodeControllerStateVariable.value = model.passCodeHolder.enterStep
                 }
             } else {
                 if isValid, let passCode = passCode {
                     model.authSucceed(.passCode(passCode))
                 } else {
-                    model.passCodeControllerStateHolder.value = model.passCodeHolder.enterStep
+                    model.passCodeControllerStateVariable.value = model.passCodeHolder.enterStep
                 }
             }
         }
@@ -172,7 +172,7 @@ extension BasePassCodeViewModel {
         validateIfNeeded()
 
         if shouldUpdateControllerState {
-            passCodeControllerStateHolder.value = passCodeHolder.enterStep
+            passCodeControllerStateVariable.value = passCodeHolder.enterStep
         }
     }
 
@@ -189,11 +189,12 @@ extension BasePassCodeViewModel {
 
         var validationResult = passCodeHolder.validate()
 
-        if passCodeHolder.type == .enter || (passCodeHolder.type == .change && passCodeHolder.enterStep == .newEnter) {
+        let passCodeValidationForPassCodeChange = passCodeHolder.type == .change && passCodeHolder.enterStep == .newEnter
+
+        if passCodeHolder.type == .enter || passCodeValidationForPassCodeChange {
             attemptsNumber += 1
 
             if let passCode = validationResult.passCode, !isEnteredPassCodeValid(passCode) {
-                assert(passCodeConfiguration.maxAttemptsNumber > attemptsNumber)
                 validationResult = .invalid(.wrongCode(passCodeConfiguration.maxAttemptsNumber - attemptsNumber))
             }
 

From d91a81b2252cb7b1db7723e61e3a3dc4064d941c Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Mon, 26 Mar 2018 16:48:05 +0300
Subject: [PATCH 11/12] Remove empty lines

---
 LeadKitAdditions/Sources/Services/BiometricsService.swift | 2 --
 1 file changed, 2 deletions(-)

diff --git a/LeadKitAdditions/Sources/Services/BiometricsService.swift b/LeadKitAdditions/Sources/Services/BiometricsService.swift
index c22b281..034ac89 100644
--- a/LeadKitAdditions/Sources/Services/BiometricsService.swift
+++ b/LeadKitAdditions/Sources/Services/BiometricsService.swift
@@ -24,8 +24,6 @@ import LocalAuthentication
 
 public typealias BiometricsAuthHandler = (Bool, Error?) -> Void
 
-
-
 /// Service that provide access to authentication via biometric
 public final class BiometricsService {
 

From 1b26dd25bd324a53909ef6b37e42337eb94193c0 Mon Sep 17 00:00:00 2001
From: Igor Kislyuk <igorkislyuk@icloud.com>
Date: Mon, 26 Mar 2018 16:49:37 +0300
Subject: [PATCH 12/12] Update podspec

---
 CHANGELOG.md             | 3 +++
 LeadKitAdditions.podspec | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7025f68..01bd1ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.1.4
+- **Update**: Refactor PassCode
+
 ## 0.1.3
 - **Update**: Typical api response keys naming
 
diff --git a/LeadKitAdditions.podspec b/LeadKitAdditions.podspec
index c015803..91d2b7a 100644
--- a/LeadKitAdditions.podspec
+++ b/LeadKitAdditions.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name            = "LeadKitAdditions"
-  s.version         = "0.1.3"
+  s.version         = "0.1.4"
   s.summary         = "iOS framework with a bunch of tools for rapid development"
   s.homepage        = "https://github.com/TouchInstinct/LeadKitAdditions"
   s.license         = "Apache License, Version 2.0"