Add password tip to payment prompt

submodules/BotPaymentsUI/Sources/BotCheckoutControllerNode.swift

@@ -470,6 +470,9 @@ final class BotCheckoutControllerNode: ItemListControllerNode, PKPaymentAuthoriz
     private let paymentAuthDisposable = MetaDisposable()
     private var applePayAuthrorizationCompletion: ((PKPaymentAuthorizationStatus) -> Void)?
     private var applePayController: PKPaymentAuthorizationViewController?
+
+    private var passwordTip: String?
+    private var passwordTipDisposable: Disposable?
     
     init(controller: BotCheckoutController?, navigationBar: NavigationBar, updateNavigationOffset: @escaping (CGFloat) -> Void, context: AccountContext, invoice: TelegramMediaInvoice, messageId: MessageId, present: @escaping (ViewController, Any?) -> Void, dismissAnimated: @escaping () -> Void) {
         self.controller = controller
@@ -885,12 +888,28 @@ final class BotCheckoutControllerNode: ItemListControllerNode, PKPaymentAuthoriz
         self.actionButton.isEnabled = false
         
         self.listNode.supernode?.insertSubnode(self.inProgressDimNode, aboveSubnode: self.listNode)
+
+        self.passwordTipDisposable = (twoStepVerificationConfiguration(account: self.context.account)
+        |> deliverOnMainQueue).start(next: { [weak self] value in
+            guard let strongSelf = self else {
+                return
+            }
+            switch value {
+            case .notSet:
+                break
+            case let .set(hint, _, _, _):
+                if !hint.isEmpty {
+                    strongSelf.passwordTip = hint
+                }
+            }
+        })
     }
     
     deinit {
         self.formRequestDisposable?.dispose()
         self.payDisposable.dispose()
         self.paymentAuthDisposable.dispose()
+        self.passwordTipDisposable?.dispose()
     }
     
     private func updateActionButton() {
@@ -1231,7 +1250,7 @@ final class BotCheckoutControllerNode: ItemListControllerNode, PKPaymentAuthoriz
             period = 1 * 60 * 60
             requiresBiometrics = false
         }
-        self.present(botCheckoutPasswordEntryController(context: self.context, strings: self.presentationData.strings, cartTitle: cardTitle, period: period, requiresBiometrics: requiresBiometrics, completion: { [weak self] token in
+        self.present(botCheckoutPasswordEntryController(context: self.context, strings: self.presentationData.strings, passwordTip: self.passwordTip, cartTitle: cardTitle, period: period, requiresBiometrics: requiresBiometrics, completion: { [weak self] token in
             if let strongSelf = self {
                 let durationString = timeIntervalString(strings: strongSelf.presentationData.strings, value: period)
                 

submodules/BotPaymentsUI/Sources/BotCheckoutPasswordEntryController.swift

@@ -94,7 +94,7 @@ private final class BotCheckoutPasswordAlertContentNode: AlertContentNode {
     
     private let hapticFeedback = HapticFeedback()
     
-    init(context: AccountContext, theme: PresentationTheme, strings: PresentationStrings, cardTitle: String, period: Int32, requiresBiometrics: Bool, cancel: @escaping () -> Void, completion: @escaping (TemporaryTwoStepPasswordToken) -> Void) {
+    init(context: AccountContext, theme: PresentationTheme, strings: PresentationStrings, passwordTip: String?, cardTitle: String, period: Int32, requiresBiometrics: Bool, cancel: @escaping () -> Void, completion: @escaping (TemporaryTwoStepPasswordToken) -> Void) {
         self.context = context
         self.period = period
         self.requiresBiometrics = requiresBiometrics
@@ -156,6 +156,8 @@ private final class BotCheckoutPasswordAlertContentNode: AlertContentNode {
         self.textFieldNode.textField.keyboardAppearance = theme.rootController.keyboardColor.keyboardAppearance
         self.textFieldNode.textField.isSecureTextEntry = true
         self.textFieldNode.textField.tintColor = theme.list.itemAccentColor
+        self.textFieldNode.textField.placeholder = passwordTip
+
         
         super.init()
         
@@ -218,7 +220,7 @@ private final class BotCheckoutPasswordAlertContentNode: AlertContentNode {
         
         let textFieldBackgroundFrame = CGRect(origin: CGPoint(x: insets.left, y: resultSize.height - inputHeight + 12.0 - actionsHeight - insets.bottom), size: CGSize(width: resultSize.width - insets.left - insets.right, height: 25.0))
         self.textFieldNodeBackground.frame = textFieldBackgroundFrame
-        self.textFieldNode.frame = textFieldBackgroundFrame.offsetBy(dx: 0.0, dy: 1.0).insetBy(dx: 4.0, dy: 0.0)
+        self.textFieldNode.frame = textFieldBackgroundFrame.offsetBy(dx: 0.0, dy: 0.0).insetBy(dx: 4.0, dy: 0.0)
         
         self.actionNodesSeparator.frame = CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight - UIScreenPixel), size: CGSize(width: resultSize.width, height: UIScreenPixel))
         
@@ -300,10 +302,10 @@ private final class BotCheckoutPasswordAlertContentNode: AlertContentNode {
     }
 }
 
-func botCheckoutPasswordEntryController(context: AccountContext, strings: PresentationStrings, cartTitle: String, period: Int32, requiresBiometrics: Bool, completion: @escaping (TemporaryTwoStepPasswordToken) -> Void) -> AlertController {
+func botCheckoutPasswordEntryController(context: AccountContext, strings: PresentationStrings, passwordTip: String?, cartTitle: String, period: Int32, requiresBiometrics: Bool, completion: @escaping (TemporaryTwoStepPasswordToken) -> Void) -> AlertController {
     var dismissImpl: (() -> Void)?
     let presentationData = context.sharedContext.currentPresentationData.with { $0 }
-    let controller = AlertController(theme: AlertControllerTheme(presentationData: presentationData), contentNode: BotCheckoutPasswordAlertContentNode(context: context, theme: presentationData.theme, strings: strings, cardTitle: cartTitle, period: period, requiresBiometrics: requiresBiometrics, cancel: {
+    let controller = AlertController(theme: AlertControllerTheme(presentationData: presentationData), contentNode: BotCheckoutPasswordAlertContentNode(context: context, theme: presentationData.theme, strings: strings, passwordTip: passwordTip, cardTitle: cartTitle, period: period, requiresBiometrics: requiresBiometrics, cancel: {
         dismissImpl?()
     }, completion: { token in
         completion(token)