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Require Face ID to open the app and to send

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This commit is contained in:
TZGyn
2026-09-27 23:35:26 +08:00
parent b989b0f791
commit 78e1cefad4
8 changed files with 172 additions and 7 deletions
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apps/ios/Koins/AppModel.swift
+33
View File
@@ -15,6 +15,18 @@ final class AppModel: ObservableObject {
@Published var moneroReady = false
@Published var moneroAddress: String?
@Published var moneroAccounts: [MoneroAccount] = []
/// Whether the app is behind the biometric lock screen right now.
@Published var locked = false
/// Face ID/Touch ID lock. On by default when the device has biometrics;
/// persisted across launches.
var faceIDEnabled: Bool {
get { UserDefaults.standard.object(forKey: "koins.faceID") as? Bool ?? true }
set {
UserDefaults.standard.set(newValue, forKey: "koins.faceID")
objectWillChange.send()
}
}
/// Rough time remaining for the Monero sync, derived from observed block rate.
@Published var syncEta: String?
@@ -41,6 +53,22 @@ final class AppModel: ObservableObject {
var symbol: String { chain.symbol }
// MARK: - Biometric lock
func authenticate() async {
if await Biometrics.authenticate(reason: "Unlock Koins") {
locked = false
}
}
/// Requires biometrics for sensitive actions when the lock is enabled; a
/// device without biometrics is not asked (the wallet is still usable).
func requireAuth(reason: String) async throws {
guard faceIDEnabled, Biometrics.isAvailable else { return }
let ok = await Biometrics.authenticate(reason: reason)
if !ok { throw XRPError.rpc("Authentication failed") }
}
// MARK: - Cache
/// Restores the last-known state for the chain on screen instantly; the
@@ -78,6 +106,9 @@ final class AppModel: ObservableObject {
if xrpWallet != nil || moneroReady {
chain = xrpWallet != nil ? .xrp : .xmr
}
if xrpWallet != nil || xmrWallet != nil, faceIDEnabled, Biometrics.isAvailable {
locked = true
}
showCached(chain)
await refresh(force: true)
startAutoRefresh()
@@ -334,6 +365,7 @@ final class AppModel: ObservableObject {
}
func revealSeed() async throws -> String {
try await requireAuth(reason: "Reveal your recovery phrase")
if chain == .xrp {
guard let seed = WalletStore.secret(.xrp) else {
throw XRPError.rpc("No stored secret for this wallet")
@@ -347,6 +379,7 @@ final class AppModel: ObservableObject {
// MARK: - Sends
func send(to: String, amount: String, tag: String, priority: TransactionPriority) async throws {
try await requireAuth(reason: "Authorize this payment")
let destinationTag = UInt32(tag.trimmingCharacters(in: .whitespaces))
if chain == .xrp {
guard let seed = WalletStore.secret(.xrp) else {
apps/ios/Koins/Info.plist
+2
View File
@@ -25,6 +25,8 @@
</dict>
<key>NSCameraUsageDescription</key>
<string>Scan a QR code to fill in a payment address.</string>
<key>NSFaceIDUsageDescription</key>
<string>Unlock Koins and approve payments.</string>
<key>UILaunchScreen</key>
<dict/>
<key>UISupportedInterfaceOrientations</key>
apps/ios/Koins/SelfTest.swift
+2
View File
@@ -290,6 +290,8 @@ enum SelfTest {
expectTrue("qr not monero", !AddressFormat.isMonero(xrpAddress))
expectTrue("qr not xrp", !AddressFormat.isXRP(xmrAddress))
emit("biometrics available=\(Biometrics.isAvailable) label=\(Biometrics.label)")
// secp256k1 signing must produce a low-S DER signature.
if let keypair = try? XRPKey.keypair(fromSeed: secpSeed),
let message = Hex.decode(signingHex),
apps/ios/Koins/Support/Biometrics.swift
+25
View File
@@ -0,0 +1,25 @@
import Foundation
import LocalAuthentication
/// Face ID / Touch ID gating for the app lock and for sensitive actions.
enum Biometrics {
static var isAvailable: Bool {
LAContext().canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
}
static var label: String {
let context = LAContext()
_ = context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
return context.biometryType == .faceID ? "Face ID" : "Touch ID"
}
/// Biometrics with the system passcode fallback (the alert offers "Use
/// Passcode" after a failed face scan).
static func authenticate(reason: String) async -> Bool {
guard isAvailable else { return false }
let context = LAContext()
context.localizedCancelTitle = "Cancel"
return (try? await context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics,
localizedReason: reason)) ?? false
}
}
apps/ios/Koins/Views/LockScreen.swift
+30
View File
@@ -0,0 +1,30 @@
import SwiftUI
/// Full-screen biometric lock, overlaid on the app whenever `model.locked`.
struct LockScreen: View {
var unlock: () -> Void
var body: some View {
ZStack {
Theme.background.ignoresSafeArea()
VStack(spacing: 16) {
Spacer()
Image(systemName: "lock.shield")
.font(.system(size: 44, weight: .light))
.foregroundStyle(Theme.accent)
Text("Koins is locked")
.font(.system(size: 22, weight: .bold))
.foregroundStyle(Theme.text)
Text("Authenticate to continue")
.font(.system(size: 13))
.foregroundStyle(Theme.muted)
Spacer()
PrimaryButton(title: "Unlock with \(Biometrics.label)", action: unlock)
Spacer()
}
.padding(24)
}
.preferredColorScheme(.dark)
.task { unlock() }
}
}
apps/ios/Koins/Views/RootView.swift
+35 -7
View File
@@ -59,6 +59,13 @@ struct RootView: View {
.scrollDismissesKeyboard(.interactively)
}
.preferredColorScheme(.dark)
.overlay {
if model.locked, model.faceIDEnabled {
LockScreen {
Task { await model.authenticate() }
}
}
}
.task { await model.bootstrap() }
.sheet(item: $seedBox) { box in
SeedRevealView(seed: box.seed, symbol: box.symbol) { seedBox = nil }
@@ -67,6 +74,9 @@ struct RootView: View {
if route == .dashboard { route = .home }
}
.onChange(of: scenePhase) { phase in
if phase == .background, model.faceIDEnabled, Biometrics.isAvailable {
model.locked = true
}
if phase != .active {
Task { await model.persistWallet() }
}
@@ -79,6 +89,7 @@ struct HomeView: View {
@Binding var route: Route
@State private var showDeleteConfirm = false
@State private var selectedTransaction: TransactionRecord?
@State private var showSettings = false
var body: some View {
VStack(spacing: 18) {
@@ -104,6 +115,10 @@ struct HomeView: View {
symbol: model.symbol,
chain: model.chain) { selectedTransaction = nil }
}
.sheet(isPresented: $showSettings) {
SettingsView()
.environmentObject(model)
}
.confirmationDialog("Delete this wallet?",
isPresented: $showDeleteConfirm,
titleVisibility: .visible) {
@@ -120,13 +135,26 @@ struct HomeView: View {
}
private var header: some View {
VStack(alignment: .leading, spacing: 4) {
Text("Koins")
.font(.system(size: 30, weight: .heavy))
.foregroundStyle(Theme.text)
Text("Monero and XRP wallet")
.font(.system(size: 13))
.foregroundStyle(Theme.muted)
HStack(alignment: .firstTextBaseline) {
VStack(alignment: .leading, spacing: 4) {
Text("Koins")
.font(.system(size: 30, weight: .heavy))
.foregroundStyle(Theme.text)
Text("Monero and XRP wallet")
.font(.system(size: 13))
.foregroundStyle(Theme.muted)
}
Spacer()
Button {
showSettings = true
} label: {
Image(systemName: "gearshape")
.font(.system(size: 17, weight: .medium))
.foregroundStyle(Theme.muted)
.frame(width: 36, height: 36)
.background(Theme.surface)
.clipShape(Circle())
}
}
.frame(maxWidth: .infinity, alignment: .leading)
}
apps/ios/Koins/Views/SettingsView.swift
+44
View File
@@ -0,0 +1,44 @@
import SwiftUI
struct SettingsView: View {
@EnvironmentObject private var model: AppModel
@Environment(\.dismiss) private var dismiss
var body: some View {
ZStack {
Theme.background.ignoresSafeArea()
VStack(alignment: .leading, spacing: 18) {
ScreenHeader(title: "Settings", subtitle: "Security and device options", onBack: { dismiss() })
Card {
Toggle(isOn: Binding(get: { model.faceIDEnabled },
set: { model.faceIDEnabled = $0 })) {
VStack(alignment: .leading, spacing: 3) {
Text("Unlock with \(Biometrics.label)")
.font(.system(size: 15, weight: .semibold))
.foregroundStyle(Theme.text)
Text("Require \(Biometrics.label) to open the app, reveal the recovery phrase, and send payments.")
.font(.system(size: 11))
.foregroundStyle(Theme.muted)
}
}
.tint(Theme.accent)
.disabled(!Biometrics.isAvailable)
if !Biometrics.isAvailable {
Text("This device has no biometric sensor configured.")
.font(.system(size: 11))
.foregroundStyle(Theme.muted)
}
}
Spacer(minLength: 0)
}
.padding(.horizontal, 20)
.padding(.top, 12)
}
.preferredColorScheme(.dark)
.presentationDetents([.medium])
.presentationDragIndicator(.visible)
}
}