Initial challenges screen + multiple fixes

Signed-off-by: Iván Ávalos <avalos@disroot.org>

20 files changed, 734 insertions, 92 deletions

diff --git a/anastasis/build.gradle.kts b/anastasis/build.gradle.kts
index 7aceb34..eedf4f2 100644
--- a/anastasis/build.gradle.kts
+++ b/anastasis/build.gradle.kts
@@ -66,6 +66,7 @@ dependencies {
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
     implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material:material")
     implementation("androidx.compose.material3:material3")
     implementation("androidx.navigation:navigation-compose:2.6.0")
     implementation("androidx.compose.material:material-icons-extended:1.4.3")
@@ -73,6 +74,7 @@ dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
     implementation("com.google.dagger:hilt-android:2.44")
     implementation("androidx.hilt:hilt-navigation-compose:1.0.0")
+    implementation("io.matthewnelson.encoding:base32:2.0.0")
     kapt("com.google.dagger:hilt-android-compiler:2.44")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
diff --git a/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt b/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt
index 4868357..18c83cd 100644
--- a/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt
@@ -13,6 +13,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.hilt.navigation.compose.hiltViewModel
 import dagger.hilt.android.AndroidEntryPoint
+import net.taler.anastasis.ui.backup.SelectAuthMethodsScreen
 import net.taler.anastasis.ui.common.SelectContinentScreen
 import net.taler.anastasis.ui.common.SelectCountryScreen
 import net.taler.anastasis.ui.common.SelectUserAttributesScreen
@@ -55,6 +56,9 @@ fun MainNavHost(
         Routes.SelectUserAttributes.route -> {
             SelectUserAttributesScreen()
         }
+        Routes.SelectAuthMethods.route -> {
+            SelectAuthMethodsScreen()
+        }
         Routes.RestoreInit.route -> {
             Text("This is the restore session screen!")
         }
diff --git a/anastasis/src/main/java/net/taler/anastasis/Routes.kt b/anastasis/src/main/java/net/taler/anastasis/Routes.kt
index 1a0accc..6d00cad 100644
--- a/anastasis/src/main/java/net/taler/anastasis/Routes.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/Routes.kt
@@ -11,6 +11,9 @@ sealed class Routes(
     object SelectCountry: Routes("select_country")
     object SelectUserAttributes: Routes("select_user_attributes")
 
+    // Backup
+    object SelectAuthMethods: Routes("select_auth_methods")
+
     // Restore
     object RestoreInit: Routes("restore")
 
diff --git a/anastasis/src/main/java/net/taler/anastasis/Utils.kt b/anastasis/src/main/java/net/taler/anastasis/Utils.kt
index 0ddd54d..8673a05 100644
--- a/anastasis/src/main/java/net/taler/anastasis/Utils.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/Utils.kt
@@ -17,11 +17,21 @@
 package net.taler.anastasis
 
 import android.os.Build
+import io.matthewnelson.encoding.base32.Base32
+import io.matthewnelson.encoding.core.Decoder.Companion.decodeToByteArray
+import io.matthewnelson.encoding.core.Encoder.Companion.encodeToString
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.flow
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.toJavaLocalDate
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.json.JSONObject
+import java.nio.charset.Charset
 import java.text.SimpleDateFormat
 import java.time.format.DateTimeFormatter
 import java.util.Locale
+import kotlin.time.Duration
 
 object Utils {
     fun formatDate(date: LocalDate): String {
@@ -34,4 +44,24 @@ object Utils {
             return formatter.format(date)
         }
     }
+
+    inline fun <reified T> Json.encodeToNativeJson(value: T): JSONObject =
+        JSONObject(encodeToString(value))
+
+    fun encodeBase32 (input: String) = input
+        .toByteArray(Charset.defaultCharset())
+        .encodeToString(Base32.Crockford)
+
+    fun decodeBase32 (input: String) = input
+        .decodeToByteArray(Base32.Crockford)
+        .toString(Charset.defaultCharset())
+
+    // Source: https://stackoverflow.com/questions/54827455/how-to-implement-timer-with-kotlin-coroutines/54828055#54828055
+    fun tickerFlow(period: Duration, initialDelay: Duration = Duration.ZERO) = flow {
+        delay(initialDelay)
+        while (true) {
+            emit(Unit)
+            delay(period)
+        }
+    }
 }
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/backend/AnastasisReducerApi.kt b/anastasis/src/main/java/net/taler/anastasis/backend/AnastasisReducerApi.kt
index 42ce566..c179d8f 100644
--- a/anastasis/src/main/java/net/taler/anastasis/backend/AnastasisReducerApi.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/backend/AnastasisReducerApi.kt
@@ -22,6 +22,7 @@ import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.json.decodeFromJsonElement
+import net.taler.anastasis.Utils.encodeToNativeJson
 import net.taler.anastasis.models.ReducerState
 import net.taler.common.ApiResponse
 import net.taler.common.ApiResponse.*
@@ -83,4 +84,29 @@ class AnastasisReducerApi() {
             WalletResponse.Error(info)
         }
     }
+
+    suspend inline fun <reified T> reduceAction(
+        state: ReducerState,
+        action: String,
+        args: T? = null,
+    ): WalletResponse<ReducerState> = withContext(Dispatchers.Default) {
+        val json = BackendManager.json
+        val body = JSONObject().apply {
+            put("state", json.encodeToNativeJson(state))
+            put("action", action)
+            if (args != null) put("args", json.encodeToNativeJson(args))
+        }
+        try {
+            when (val response = sendRequest("anastasisReduce", body)) {
+                is Response -> {
+                    val t = json.decodeFromJsonElement<ReducerState>(response.result)
+                    WalletResponse.Success(t)
+                }
+                is Error -> error("invalid reducer response")
+            }
+        } catch (e: Exception) {
+            val info = TalerErrorInfo(NONE, "", e.toString())
+            WalletResponse.Error(info)
+        }
+    }
 }
diff --git a/anastasis/src/main/java/net/taler/anastasis/models/ReducerArgs.kt b/anastasis/src/main/java/net/taler/anastasis/models/ReducerArgs.kt
new file mode 100644
index 0000000..c87e76d
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/models/ReducerArgs.kt
@@ -0,0 +1,74 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.anastasis.models
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+sealed class ReducerArgs {
+
+    @Serializable
+    data class EnterUserAttributes(
+        @SerialName("identity_attributes")
+        val identityAttributes: Map<String, String>,
+    )
+
+    // TODO: ActionArgsAddProvider
+
+    // TODO: ActionArgsDeleteProvider
+
+    @Serializable
+    data class AddAuthentication(
+        @SerialName("authentication_method")
+        val authenticationMethod: AuthMethod,
+    )
+
+    // TODO: ActionArgsDeleteAuthentication
+
+    // TODO: ActionArgsDeletePolicy
+
+    // TODO: ActionArgsEnterSecretName
+
+    // TODO: ActionArgsEnterSecret
+
+    @Serializable
+    data class SelectContinent(
+        val continent: String,
+    )
+
+    @Serializable
+    data class SelectCountry(
+        @SerialName("country_code")
+        val countryCode: String,
+    )
+
+    // TODO: ActionArgsSelectChallenge
+
+    // TODO: ActionArgsSolveChallengeRequest
+
+    // TODO: ActionArgsAddPolicy
+
+    // TODO: ActionArgsUpdateExpiration
+
+    // TODO: ActionArgsUpdateExpiration
+
+    // TODO: ActionArgsChangeVersion
+
+    // TODO: ActionArgsUpdatePolicy
+
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/models/ReducerState.kt b/anastasis/src/main/java/net/taler/anastasis/models/ReducerState.kt
index 37f380f..83afc88 100644
--- a/anastasis/src/main/java/net/taler/anastasis/models/ReducerState.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/models/ReducerState.kt
@@ -305,7 +305,7 @@ sealed class AuthenticationProviderStatus {
         val annualFee: String,
         @SerialName("business_name")
         val businessName: String,
-        val currency: String,
+        val currency: String? = null,
         @SerialName("http_status")
         val httpStatus: Int,
         @SerialName("liability_limit")
@@ -335,30 +335,6 @@ sealed class AuthenticationProviderStatus {
 
 // TODO: ReducerStateBackupUserAttributesCollecting
 
-// TODO: ActionArgsEnterUserAttributes
-
-// TODO: ActionArgsAddProvider
-
-// TODO: ActionArgsDeleteProvider
-
-// TODO: ActionArgsAddAuthentication
-
-// TODO: ActionArgsDeleteAuthentication
-
-// TODO: ActionArgsDeletePolicy
-
-// TODO: ActionArgsEnterSecretName
-
-// TODO: ActionArgsEnterSecret
-
-// TODO: ActionArgsSelectContinent
-
-// TODO: ActionArgsSelectCountry
-
-// TODO: ActionArgsSelectChallenge
-
-// TODO: ActionArgsSolveChallengeRequest
-
 // TODO: SolveChallengeAnswerRequest
 
 // TODO: SolveChallengePinRequest
@@ -367,12 +343,6 @@ sealed class AuthenticationProviderStatus {
 
 // TODO: PolicyMember
 
-// TODO: ActionArgsAddPolicy
-
-// TODO: ActionArgsUpdateExpiration
-
-// TODO: ActionArgsUpdateExpiration
-
 @Serializable
 data class SelectedVersionInfoProviders(
     val url: String,
@@ -385,10 +355,6 @@ data class SelectedVersionInfo(
     val providers: SelectedVersionInfoProviders,
 )
 
-// TODO: ActionArgsChangeVersion
-
-// TODO: ActionArgsUpdatePolicy
-
 // TODO: DiscoveryCursor
 
 // TODO: PolicyMetaInfo
diff --git a/anastasis/src/main/java/net/taler/anastasis/reducers/ReducerManager.kt b/anastasis/src/main/java/net/taler/anastasis/reducers/ReducerManager.kt
index 90a5158..0aed98f 100644
--- a/anastasis/src/main/java/net/taler/anastasis/reducers/ReducerManager.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/reducers/ReducerManager.kt
@@ -16,21 +16,35 @@
 
 package net.taler.anastasis.reducers
 
+import android.util.Log
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.encodeToJsonElement
+import net.taler.anastasis.Utils
 import net.taler.anastasis.backend.AnastasisReducerApi
+import net.taler.anastasis.models.AuthenticationProviderStatus
 import net.taler.anastasis.models.ContinentInfo
 import net.taler.anastasis.models.CountryInfo
+import net.taler.anastasis.models.ReducerArgs
 import net.taler.anastasis.models.ReducerState
+import org.json.JSONObject
+import kotlin.time.Duration.Companion.seconds
 
 class ReducerManager(
     private val state: MutableStateFlow<ReducerState?>,
     private val api: AnastasisReducerApi,
     private val scope: CoroutineScope,
 ) {
+    private companion object {
+        const val PROVIDER_SYNC_PERIOD = 20
+    }
+
+    private var providerSyncingJob: Job? = null
+
     // TODO: error handling!
 
     fun startBackup() = scope.launch {
@@ -75,7 +89,65 @@ class ReducerManager(
     fun enterUserAttributes(userAttributes: Map<String, String>) = scope.launch {
         state.value?.let {  initialState ->
             api.reduceAction(initialState, "enter_user_attributes") {
-                put("identity_attributes", Json.encodeToJsonElement(userAttributes))
+                put("identity_attributes", JSONObject(userAttributes))
+            }.onSuccess { newState ->
+                state.value = newState
+            }
+        }
+    }
+
+    fun startSyncingProviders() {
+        if (providerSyncingJob != null) return
+        providerSyncingJob = Utils.tickerFlow(PROVIDER_SYNC_PERIOD.seconds)
+            .onEach {
+                state.value?.let { initialState ->
+                    // Only run sync when not all providers are synced
+                    if (initialState is ReducerState.Backup) {
+                        initialState.authenticationProviders?.flatMap {
+                            listOf(it.value)
+                        }?.fold(false) { a, b ->
+                            a || (b !is AuthenticationProviderStatus.Ok)
+                        }?.let { sync ->
+                            if (!sync) {
+                                Log.d("ReducerManager", "All providers are synced")
+                                return@onEach
+                            }
+                        }
+                    }
+                    Log.d("ReducerManager", "Syncing providers...")
+                    api.reduceAction(initialState, "sync_providers")
+                        .onSuccess { newState ->
+                            state.value = newState
+                        }
+                        .onError {
+                            Log.d("ReducerManager", "Sync error: $it")
+                        }
+                }
+            }
+            .catch {
+                Log.d("ReducerManager", "Could not sync providers")
+            }
+            .launchIn(scope)
+    }
+
+    fun stopSyncingProviders() {
+        providerSyncingJob?.cancel()
+        providerSyncingJob = null
+    }
+
+    fun addAuthentication(args: ReducerArgs.AddAuthentication) = scope.launch {
+        state.value?.let { initialState ->
+            api.reduceAction(initialState, "add_authentication", args)
+                .onSuccess { newState ->
+                    state.value = newState
+                }
+        }
+    }
+
+    fun deleteAuthentication(index: Int) = scope.launch {
+        state.value?.let { initialState ->
+            api.reduceAction(initialState, "delete_authentication") {
+                put("index", index)
             }.onSuccess { newState ->
                 state.value = newState
             }
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/backup/EditMethodDialog.kt b/anastasis/src/main/java/net/taler/anastasis/ui/backup/EditMethodDialog.kt
new file mode 100644
index 0000000..6d30443
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/backup/EditMethodDialog.kt
@@ -0,0 +1,114 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.anastasis.ui.backup
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import net.taler.anastasis.R
+import net.taler.anastasis.Utils
+import net.taler.anastasis.models.AuthMethod
+
+@Composable
+fun EditMethodDialog(
+    type: String? = null,
+    method: AuthMethod? = null,
+    onMethodEdited: (method: AuthMethod) -> Unit,
+    onCancel: () -> Unit,
+) {
+    var localMethod by remember { mutableStateOf(method?.copy(
+        challenge = Utils.decodeBase32(method.challenge),
+    )) }
+    AlertDialog(
+        onDismissRequest = onCancel,
+        title = { Text(stringResource(R.string.add_challenge)) },
+        text = {
+               when(type ?: method?.type) {
+                   "question" -> EditQuestionForm(
+                       method = localMethod,
+                       onMethodEdited = {
+                           localMethod = it
+                       },
+                   )
+               }
+        },
+        dismissButton = {
+            TextButton(onClick = {
+                onCancel()
+            }) {
+                Text(stringResource(R.string.cancel))
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = {
+                localMethod?.let { onMethodEdited(
+                    it.copy(
+                        challenge = Utils.encodeBase32(it.challenge)
+                    )
+                ) }
+            }) {
+                Text(stringResource(R.string.add))
+            }
+        }
+    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun EditQuestionForm(
+    method: AuthMethod? = null,
+    onMethodEdited: (method: AuthMethod) -> Unit,
+) {
+    val localMethod = method ?: AuthMethod(
+        type = "question",
+        instructions = "",
+        challenge = "",
+        mimeType = "plain/text",
+    )
+
+    Column {
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = localMethod.instructions,
+            onValueChange = {
+                onMethodEdited(localMethod.copy(instructions = it))
+            },
+            label = { Text(stringResource(R.string.question)) },
+        )
+
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = localMethod.challenge,
+            onValueChange = {
+                onMethodEdited(localMethod.copy(challenge = it))
+            },
+            label = { Text(stringResource(R.string.answer)) },
+        )
+    }
+
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/backup/SelectAuthMethodsScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/backup/SelectAuthMethodsScreen.kt
new file mode 100644
index 0000000..3bdd129
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/backup/SelectAuthMethodsScreen.kt
@@ -0,0 +1,254 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.anastasis.ui.backup
+
+import android.util.Log
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.AccountBalance
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Email
+import androidx.compose.material.icons.filled.Mail
+import androidx.compose.material.icons.filled.QuestionMark
+import androidx.compose.material.icons.filled.Sms
+import androidx.compose.material.icons.filled.Token
+import androidx.compose.material3.Divider
+import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import net.taler.anastasis.R
+import net.taler.anastasis.Utils
+import net.taler.anastasis.models.AuthMethod
+import net.taler.anastasis.models.AuthenticationProviderStatus
+import net.taler.anastasis.models.ReducerArgs
+import net.taler.anastasis.models.ReducerState
+import net.taler.anastasis.ui.reusable.components.ActionCard
+import net.taler.anastasis.ui.reusable.pages.WizardPage
+import net.taler.anastasis.ui.theme.LocalSpacing
+import net.taler.anastasis.viewmodels.ReducerViewModel
+
+@Composable
+fun SelectAuthMethodsScreen(
+    viewModel: ReducerViewModel = hiltViewModel(),
+) {
+    val reducerState by viewModel.reducerState.collectAsState()
+
+    val authProviders = when (val state = reducerState) {
+        is ReducerState.Backup -> state.authenticationProviders
+        else -> error("invalid reducer state type")
+    } ?: emptyMap()
+
+    // Get only methods of providers with "ok" status
+    val availableMethods = authProviders.flatMap { entry ->
+        if (entry.value is AuthenticationProviderStatus.Ok) {
+            (entry.value as AuthenticationProviderStatus.Ok).methods.map { it.type }
+        } else emptyList()
+    }.distinct()
+
+    val selectedMethods = when (val state = reducerState) {
+        is ReducerState.Backup -> state.authenticationMethods
+        else -> error("invalid reducer state type")
+    } ?: emptyList()
+
+    var showEditDialog by remember { mutableStateOf(false) }
+    var methodType by remember { mutableStateOf<String?>(null) }
+    var method by remember { mutableStateOf<AuthMethod?>(null) }
+
+    val reset = {
+        showEditDialog = false
+        methodType = null
+        method = null
+    }
+
+    if (showEditDialog) {
+        EditMethodDialog(
+            type = methodType,
+            method = method,
+            onCancel = {
+                reset()
+            },
+            onMethodEdited = {
+                reset()
+                Log.d("onMethodEdited", it.challenge)
+                viewModel.reducerManager.addAuthentication(
+                    ReducerArgs.AddAuthentication(it)
+                )
+            }
+        )
+    }
+
+    WizardPage(
+        title = stringResource(R.string.select_auth_methods_title),
+        onBackClicked = {
+            viewModel.goHome()
+        },
+        onPrevClicked = {
+            viewModel.reducerManager.back()
+        },
+    ) {
+        AuthMethods(
+            availableMethods = availableMethods,
+            selectedMethods = selectedMethods,
+            onAddMethod = {
+                methodType = it
+                showEditDialog = true
+            },
+            onDeleteMethod = {
+                viewModel.reducerManager.deleteAuthentication(it)
+            },
+        )
+    }
+}
+
+@Composable
+private fun AuthMethods(
+    availableMethods: List<String>,
+    selectedMethods: List<AuthMethod>,
+    onAddMethod: (type: String) -> Unit,
+    onDeleteMethod: (index: Int) -> Unit,
+) {
+    LazyColumn(
+        modifier = Modifier
+            .padding(LocalSpacing.current.medium)
+            .fillMaxWidth(),
+        verticalArrangement = Arrangement.Top,
+    ) {
+        items(items = availableMethods) { method ->
+            when (method) {
+                "question" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.QuestionMark, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_question)
+                ) { onAddMethod("question") }
+                "sms" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.Sms, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_sms)
+                ) { onAddMethod("sms") }
+                "email" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.Email, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_email)
+                ) { onAddMethod("email") }
+                "iban" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.AccountBalance, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_question)
+                ) { onAddMethod("iban") }
+                "mail" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.Mail, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_mail)
+                ) { onAddMethod("mail") }
+                "totp" -> ActionCard(
+                    modifier = Modifier
+                        .padding(bottom = LocalSpacing.current.small)
+                        .fillMaxWidth(),
+                    icon = { Icon(Icons.Default.Token, contentDescription = null) },
+                    headline = stringResource(R.string.auth_method_totp)
+                ) { onAddMethod("totp") }
+                else -> {}
+            }
+        }
+
+        item {
+            Divider(Modifier.padding(bottom = LocalSpacing.current.small))
+        }
+
+        items(count = selectedMethods.size) { i ->
+            ChallengeCard(
+                modifier = Modifier
+                    .padding(bottom = LocalSpacing.current.small)
+                    .fillMaxWidth(),
+                authMethod = selectedMethods[i],
+                onDelete = { onDeleteMethod(i) },
+            )
+        }
+    }
+}
+
+@Composable
+private fun ChallengeCard(
+    modifier: Modifier = Modifier,
+    authMethod: AuthMethod,
+    onDelete: () -> Unit,
+) {
+    ElevatedCard(
+        modifier = modifier,
+    ) {
+        Column(modifier = Modifier.padding(LocalSpacing.current.medium)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(when (authMethod.type) {
+                    "question" -> Icons.Default.QuestionMark
+                    "sms" -> Icons.Default.Sms
+                    "email" -> Icons.Default.Email
+                    "iban" -> Icons.Default.AccountBalance
+                    "mail" -> Icons.Default.Mail
+                    "totp" -> Icons.Default.Token
+                    else -> error("unknown auth method")
+                }, contentDescription = null)
+                Spacer(modifier = Modifier.width(12.dp))
+                Column {
+                    Text(authMethod.instructions, style = MaterialTheme.typography.titleMedium)
+                    Text(
+                        text = Utils.decodeBase32(authMethod.challenge),
+                        style = MaterialTheme.typography.bodyMedium,
+                        modifier = Modifier.padding(top = 5.dp)
+                    )
+                }
+                Spacer(modifier = Modifier.weight(1f))
+                IconButton(onClick = onDelete) {
+                    Icon(
+                        Icons.Default.Delete,
+                        contentDescription = stringResource(R.string.delete),
+                    )
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectContinentScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectContinentScreen.kt
index b8ec266..3fabd1a 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectContinentScreen.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectContinentScreen.kt
@@ -20,10 +20,6 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
@@ -49,21 +45,18 @@ fun SelectContinentScreen(
     val continents = when (val state = reducerState) {
         is ReducerState.Backup -> state.continents
         is ReducerState.Recovery -> state.continents
-        else -> null
+        else -> error("invalid reducer state type")
     } ?: emptyList()
 
     var selectedContinent by remember { mutableStateOf<ContinentInfo?>(null) }
 
     WizardPage(
-        title = stringResource(R.string.select_country_title),
-        navigationIcon = {
-            IconButton(onClick = {
-                viewModel.goHome()
-            }) {
-                Icon(Icons.Default.ArrowBack, "back")
-            }
-        },
+        title = stringResource(R.string.select_continent_title),
         showPrev = false,
+        enableNext = selectedContinent != null,
+        onBackClicked = {
+            viewModel.goHome()
+        },
         onNextClicked = {
             selectedContinent?.let {
                 viewModel.reducerManager.selectContinent(it)
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectCountryScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectCountryScreen.kt
index 1c4fa49..639519f 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectCountryScreen.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectCountryScreen.kt
@@ -20,10 +20,6 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
@@ -49,19 +45,16 @@ fun SelectCountryScreen(
     val countries = when (val state = reducerState) {
         is ReducerState.Backup -> state.countries
         is ReducerState.Recovery -> state.countries
-        else -> null
+        else -> error("invalid reducer state type")
     } ?: emptyList()
 
     var selectedCountry by remember { mutableStateOf<CountryInfo?>(null) }
 
     WizardPage(
         title = stringResource(R.string.select_country_title),
-        navigationIcon = {
-            IconButton(onClick = {
-                viewModel.goHome()
-            }) {
-                Icon(Icons.Default.ArrowBack, "back")
-            }
+        enableNext = selectedCountry != null,
+        onBackClicked = {
+            viewModel.goHome()
         },
         onPrevClicked = {
             viewModel.reducerManager.back()
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectUserAttributesScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectUserAttributesScreen.kt
index 6fa9f97..51d971f 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectUserAttributesScreen.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/common/SelectUserAttributesScreen.kt
@@ -24,11 +24,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -58,19 +54,15 @@ fun SelectUserAttributesScreen(
     val userAttributes = when (val state = reducerState) {
         is ReducerState.Backup -> state.requiredAttributes
         is ReducerState.Recovery -> state.requiredAttributes
-        else -> null
+        else -> error("invalid reducer state type")
     } ?: emptyList()
 
     val values = remember { mutableStateMapOf<String, String>() }
 
     WizardPage(
         title = stringResource(R.string.select_user_attributes_title),
-        navigationIcon = {
-            IconButton(onClick = {
-                viewModel.goHome()
-            }) {
-                Icon(Icons.Default.ArrowBack, "back")
-            }
+        onBackClicked = {
+            viewModel.goHome()
         },
         onPrevClicked = {
             viewModel.reducerManager.back()
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/home/HomeScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/home/HomeScreen.kt
index f79c3a2..cf24c48 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/home/HomeScreen.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/home/HomeScreen.kt
@@ -16,10 +16,10 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import net.taler.anastasis.R
 import net.taler.anastasis.ui.reusable.components.ActionCard
+import net.taler.anastasis.ui.theme.LocalSpacing
 import net.taler.anastasis.viewmodels.ReducerViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -39,14 +39,14 @@ fun HomeScreen(
         Column(
             modifier = Modifier
                 .padding(it)
-                .padding(16.dp),
+                .padding(LocalSpacing.current.medium),
             verticalArrangement = Arrangement.SpaceEvenly,
         ) {
             // Backup
             ActionCard(
                 modifier = Modifier
                     .weight(1f)
-                    .padding(bottom = 8.dp)
+                    .padding(bottom = LocalSpacing.current.small)
                     .fillMaxWidth(),
                 icon = { Icon(Icons.Outlined.Upload, null) },
                 headline = stringResource(R.string.backup_secret),
@@ -59,7 +59,7 @@ fun HomeScreen(
             ActionCard(
                 modifier = Modifier
                     .weight(1f)
-                    .padding(bottom = 8.dp)
+                    .padding(bottom = LocalSpacing.current.small)
                     .fillMaxWidth(),
                 icon = { Icon(Icons.Outlined.Download, null) },
                 headline = stringResource(R.string.recover_secret),
@@ -72,7 +72,7 @@ fun HomeScreen(
             ActionCard(
                 modifier = Modifier
                     .weight(1f)
-                    .padding(bottom = 8.dp)
+                    .padding(bottom = LocalSpacing.current.small)
                     .fillMaxWidth(),
                 icon = { Icon(Icons.Outlined.Restore, null) },
                 headline = stringResource(R.string.restore_session),
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/ActionCard.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/ActionCard.kt
index 72d3cbb..6eea2ce 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/ActionCard.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/ActionCard.kt
@@ -18,6 +18,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import net.taler.anastasis.ui.theme.LocalSpacing
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -32,15 +33,14 @@ fun ActionCard(
     ElevatedCard(
         modifier = modifier,
         onClick = onClick,
-
     ) {
-        Column(modifier = Modifier.padding(16.dp)) {
+        Column(modifier = Modifier.padding(LocalSpacing.current.medium)) {
             Row(verticalAlignment = Alignment.CenterVertically) {
                 if (icon != null) {
                     icon()
                     Spacer(modifier = Modifier.width(12.dp))
                 }
-                Text(headline, style = MaterialTheme.typography.titleLarge)
+                Text(headline, style = MaterialTheme.typography.titleMedium)
             }
             subhead?.let {
                 Text(
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Form.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Form.kt
new file mode 100644
index 0000000..acf3fa4
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Form.kt
@@ -0,0 +1,88 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.anastasis.ui.reusable.components
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import net.taler.anastasis.R
+import net.taler.anastasis.ui.theme.LocalSpacing
+
+@Composable
+fun Form(
+    modifier: Modifier = Modifier,
+    button: @Composable () -> Unit,
+    onCancelClicked: () -> Unit,
+    content: @Composable ColumnScope.() -> Unit,
+) {
+    Column(modifier = modifier) {
+        Column (content = content)
+        Spacer(Modifier.height(LocalSpacing.current.medium))
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceAround,
+        ) {
+            TextButton(
+                onClick = onCancelClicked,
+            ) {
+                Text(stringResource(R.string.cancel))
+                Spacer(Modifier.weight(1f))
+                button()
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Preview
+@Composable
+fun FormPreview() {
+    Form(
+        modifier = Modifier.fillMaxWidth(),
+        button = {
+            Button(onClick = {}) {
+                Text("Create")
+            }
+        },
+        onCancelClicked = {}
+    ) {
+        var email by remember { mutableStateOf("") }
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = email,
+            onValueChange = { email = it },
+            label = { Text(stringResource(R.string.question)) },
+        )
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
index 4c649a6..cd8e798 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
@@ -49,7 +49,7 @@ fun Picker(
     onOptionChanged: (String) -> Unit,
 ) {
     var filteredOptions by remember { mutableStateOf(options.toList()) }
-    var inputValue by remember { mutableStateOf(options.first()) }
+    var inputValue by remember { mutableStateOf("") }
     val keyboardController = LocalSoftwareKeyboardController.current
 
     Column(
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/pages/WizardPage.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/pages/WizardPage.kt
index 77b467a..e6a24d6 100644
--- a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/pages/WizardPage.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/pages/WizardPage.kt
@@ -26,17 +26,21 @@ import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import net.taler.anastasis.R
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun WizardPage(
     modifier: Modifier = Modifier,
     title: String,
-    navigationIcon: @Composable () -> Unit = {},
+    enableNext: Boolean = true,
+    enablePrev: Boolean = true,
     showNext: Boolean = true,
     showPrev: Boolean = true,
+    onBackClicked: () -> Unit = {},
     onNextClicked: () -> Unit = {},
     onPrevClicked: () -> Unit = {},
     content: @Composable () -> Unit,
@@ -45,7 +49,11 @@ fun WizardPage(
         topBar = {
             LargeTopAppBar(
                 title = { Text(title) },
-                navigationIcon = navigationIcon,
+                navigationIcon = {
+                    IconButton(onClick = onBackClicked) {
+                        Icon(Icons.Default.ArrowBack, stringResource(R.string.back))
+                    }
+                }
             )
         },
     ) {
@@ -64,6 +72,7 @@ fun WizardPage(
             ) {
                 if (showPrev) {
                     TextButton(
+                        enabled = enablePrev,
                         onClick = onPrevClicked,
                     ) {
                         Icon(
@@ -72,7 +81,7 @@ fun WizardPage(
                             modifier = Modifier.size(ButtonDefaults.IconSize),
                         )
                         Spacer(Modifier.size(ButtonDefaults.IconSpacing))
-                        Text("Previous")
+                        Text(stringResource(R.string.previous))
                     }
                 }
 
@@ -80,9 +89,10 @@ fun WizardPage(
 
                 if (showNext) {
                     Button(
+                        enabled = enableNext,
                         onClick = onNextClicked,
                     ) {
-                        Text("Next")
+                        Text(stringResource(R.string.next))
                         Spacer(Modifier.size(ButtonDefaults.IconSpacing))
                         Icon(
                             Icons.Default.NavigateNext,
@@ -101,11 +111,6 @@ fun WizardPage(
 fun WizardPagePreview() {
     WizardPage(
         title = "Title",
-        navigationIcon = {
-            IconButton(onClick = {}) {
-                Icon(Icons.Default.ArrowBack, null)
-            }
-        },
     ) {
         Box (
             modifier = Modifier.fillMaxSize(),
diff --git a/anastasis/src/main/java/net/taler/anastasis/viewmodels/ReducerViewModel.kt b/anastasis/src/main/java/net/taler/anastasis/viewmodels/ReducerViewModel.kt
index 3f5671b..050e0f5 100644
--- a/anastasis/src/main/java/net/taler/anastasis/viewmodels/ReducerViewModel.kt
+++ b/anastasis/src/main/java/net/taler/anastasis/viewmodels/ReducerViewModel.kt
@@ -46,12 +46,16 @@ class ReducerViewModel @Inject constructor(): ViewModel() {
         viewModelScope.launch {
             _reducerState.collect {
                 Log.d("ReducerViewModel", it?.toString() ?: "nothing")
+                reducerManager.stopSyncingProviders()
                 _navRoute.value = when (it) {
                     is ReducerState.Backup -> when (it.backupState) {
                         BackupStates.ContinentSelecting -> Routes.SelectContinent.route
                         BackupStates.CountrySelecting -> Routes.SelectCountry.route
                         BackupStates.UserAttributesCollecting -> Routes.SelectUserAttributes.route
-                        BackupStates.AuthenticationsEditing -> TODO()
+                        BackupStates.AuthenticationsEditing -> {
+                            reducerManager.startSyncingProviders()
+                            Routes.SelectAuthMethods.route
+                        }
                         BackupStates.PoliciesReviewing -> TODO()
                         BackupStates.SecretEditing -> TODO()
                         BackupStates.TruthsPaying -> TODO()
diff --git a/anastasis/src/main/res/values/strings.xml b/anastasis/src/main/res/values/strings.xml
index de788ce..627fc50 100644
--- a/anastasis/src/main/res/values/strings.xml
+++ b/anastasis/src/main/res/values/strings.xml
@@ -8,11 +8,33 @@
     <string name="restore_session">Restore session</string>
 
     <!-- Shared -->
+    <string name="back">Go back</string>
+    <string name="next">Next</string>
+    <string name="previous">Previous</string>
+    <string name="add">Add</string>
+    <string name="edit">Edit</string>
+    <string name="delete">Delete</string>
+    <string name="cancel">Cancel</string>
+    <string name="menu">Menu</string>
     <string name="country">Country</string>
     <string name="continent">Continent</string>
+    <string name="question">Security question</string>
+    <string name="answer">Answer</string>
 
     <!-- Common -->
+    <string name="select_continent_title">Where do you live?</string>
     <string name="select_country_title">Where do you live?</string>
     <string name="select_user_attributes_title">Who are you?</string>
+
+    <!-- Backup -->
     <string name="select_auth_methods_title">Authentication methods</string>
+    <string name="auth_method_question">Add a question challenge</string>
+    <string name="auth_method_sms">Add a SMS challenge</string>
+    <string name="auth_method_email">Add an e-mail challenge</string>
+    <string name="auth_method_iban">Add an IBAN provider</string>
+    <string name="auth_method_mail">Add a physical mail provider</string>
+    <string name="auth_method_totp">Add a TOTP challenge</string>
+    <string name="backup_providers">Manage backup providers</string>
+    <string name="add_challenge">Add challenge</string>
+    <string name="edit_challenge">Edit challenge</string>
 </resources>
\ No newline at end of file