Initial work for Anastasis integration

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

45 files changed, 2174 insertions, 1 deletions

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 9b17a13..7b20069 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/anastasis" />
             <option value="$PROJECT_DIR$/cashier" />
             <option value="$PROJECT_DIR$/merchant-lib" />
             <option value="$PROJECT_DIR$/merchant-terminal" />
diff --git a/anastasis/.gitignore b/anastasis/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/anastasis/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/anastasis/build.gradle.kts b/anastasis/build.gradle.kts
new file mode 100644
index 0000000..85fb2ec
--- /dev/null
+++ b/anastasis/build.gradle.kts
@@ -0,0 +1,77 @@
+plugins {
+    kotlin("kapt")
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.serialization")
+    id("com.google.dagger.hilt.android")
+}
+
+val qtartVersion = "0.9.3-dev.13"
+
+@Suppress("UnstableApiUsage")
+android {
+    namespace = "net.taler.anastasis"
+    compileSdk = 33
+
+    defaultConfig {
+        applicationId = "net.taler.anastasis"
+        minSdk = 24
+        targetSdk = 33
+        versionCode = 1
+        versionName = "1.0"
+
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.4.6"
+    }
+    packagingOptions {
+        jniLibs {
+            keepDebugSymbols += arrayOf("**/*.so")
+        }
+        resources {
+            excludes += arrayOf("META-INF/{AL2.0,LGPL2.1}/*.kotlin_module")
+        }
+    }
+}
+
+dependencies {
+    implementation(project(":taler-kotlin-android"))
+    implementation("net.taler:qtart:$qtartVersion@aar")
+    implementation("androidx.core:core-ktx:1.10.1")
+    implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
+    implementation("androidx.activity:activity-compose:1.7.2")
+    implementation(platform("androidx.compose:compose-bom:2022.10.00"))
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    implementation("androidx.navigation:navigation-compose:2.6.0")
+    implementation("androidx.compose.material:material-icons-extended:1.4.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
+    implementation("com.google.dagger:hilt-android:2.44")
+    kapt("com.google.dagger:hilt-android-compiler:2.44")
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
+}
\ No newline at end of file
diff --git a/anastasis/proguard-rules.pro b/anastasis/proguard-rules.pro
new file mode 100644
index 0000000..ff59496
--- /dev/null
+++ b/anastasis/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.kts.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/anastasis/src/main/AndroidManifest.xml b/anastasis/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..8c22a46
--- /dev/null
+++ b/anastasis/src/main/AndroidManifest.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Anastasis"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Anastasis">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt b/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt
new file mode 100644
index 0000000..24f604a
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/MainActivity.kt
@@ -0,0 +1,104 @@
+package net.taler.anastasis
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import net.taler.anastasis.models.ContinentInfo
+import net.taler.anastasis.models.CountryInfo
+import net.taler.anastasis.models.UserAttributeSpec
+import net.taler.anastasis.ui.backup.BackupContinentScreen
+import net.taler.anastasis.ui.backup.BackupCountryScreen
+import net.taler.anastasis.ui.backup.BackupUserAttributesScreen
+import net.taler.anastasis.ui.home.HomeScreen
+import net.taler.anastasis.ui.theme.AnastasisTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            AnastasisTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background,
+                ) {
+                    MainNavHost()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun MainNavHost() {
+    val navController = rememberNavController()
+    NavHost(
+        navController = navController,
+        startDestination = Routes.Home.route,
+    ) {
+        composable(Routes.Home.route) {
+            HomeScreen(navController = navController)
+        }
+        composable(Routes.BackupContinent.route) {
+            BackupContinentScreen(
+                navController = navController,
+                continents = listOf(
+                    ContinentInfo("Europe"),
+                    ContinentInfo("India"),
+                    ContinentInfo("Asia"),
+                    ContinentInfo("North America")
+                ),
+                onSelectContinent = {},
+            )
+        }
+        composable(Routes.BackupCountry.route) {
+            BackupCountryScreen(
+                navController = navController,
+                countries = listOf(
+                    CountryInfo("ch", "Switzerland", "Europe"),
+                    CountryInfo("de", "Germany", "Europe"),
+                ),
+                onSelectCountry = {},
+            )
+        }
+        composable(Routes.BackupUserAttributes.route) {
+            BackupUserAttributesScreen(
+                navController = navController,
+                userAttributes = listOf(
+                    UserAttributeSpec(
+                        type = "string",
+                        name = "full_name",
+                        label = "Full name",
+                        widget = "anastasis_gtk_ia_full_name",
+                        uuid = "9e8f463f-575f-42cb-85f3-759559997331",
+                        validationLogic = null,
+                        validationRegex = null,
+                    ),
+                    UserAttributeSpec(
+                        type = "date",
+                        name = "birthdate",
+                        label = "Birthdate",
+                        uuid = "83d655c7-bdb6-484d-904e-80c1058c8854",
+                        widget = "anastasis_gtk_ia_birthdate",
+                        validationLogic = null,
+                        validationRegex = null,
+                    ),
+                ),
+            )
+        }
+        composable(Routes.RecoveryCountry.route) {
+            Text("This is the recover screen!")
+        }
+        composable(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
new file mode 100644
index 0000000..18db321
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/Routes.kt
@@ -0,0 +1,25 @@
+package net.taler.anastasis
+
+
+sealed class Routes(
+    val route: String
+) {
+    object Home: Routes("home")
+
+    // Backup
+    object BackupContinent: Routes("backup_continent")
+    object BackupCountry: Routes("backup_country")
+    object BackupUserAttributes: Routes("backup_user_attributes")
+
+    // Recovery
+    object RecoveryCountry: Routes("recovery_country")
+
+    // Restore
+    object RestoreInit: Routes("restore")
+
+//    fun withArgs(args: Map<String, Any>) = with(Uri.parse(route).buildUpon()) {
+//        args.forEach { entry ->
+//            appendQueryParameter(entry.key, entry.value.toString())
+//        }
+//    }.toString()
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/Utils.kt b/anastasis/src/main/java/net/taler/anastasis/Utils.kt
new file mode 100644
index 0000000..0ddd54d
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/Utils.kt
@@ -0,0 +1,37 @@
+/*
+ * 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
+
+import android.os.Build
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.toJavaLocalDate
+import java.text.SimpleDateFormat
+import java.time.format.DateTimeFormatter
+import java.util.Locale
+
+object Utils {
+    fun formatDate(date: LocalDate): String {
+        val javaDate = date.toJavaLocalDate()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd")
+            return javaDate.format(formatter)
+        } else {
+            val formatter = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+            return formatter.format(date)
+        }
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/models/ChallengeFeedback.kt b/anastasis/src/main/java/net/taler/anastasis/models/ChallengeFeedback.kt
new file mode 100644
index 0000000..57496db
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/models/ChallengeFeedback.kt
@@ -0,0 +1,84 @@
+package net.taler.anastasis.models
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonClassDiscriminator
+import net.taler.common.Amount
+
+@OptIn(ExperimentalSerializationApi::class)
+@Serializable
+@JsonClassDiscriminator("state")
+abstract class ChallengeFeedback
+
+@Serializable
+@SerialName("solved")
+class ChallengeFeedbackSolved: ChallengeFeedback()
+
+@Serializable
+@SerialName("incorrect-answer")
+class ChallengeFeedbackIncorrectAnswer: ChallengeFeedback()
+
+@Serializable
+@SerialName("code-in-file")
+data class ChallengeFeedbackCodeInFile(
+    val filename: String,
+    @SerialName("display_hint")
+    val displayHint: String,
+): ChallengeFeedback()
+
+@Serializable
+@SerialName("code-sent")
+data class ChallengeFeedbackCodeSent(
+    @SerialName("display_hint")
+    val displayHint: String,
+    @SerialName("address_hint")
+    val addressHint: String,
+): ChallengeFeedback()
+
+@Serializable
+@SerialName("unsupported")
+data class ChallengeFeedbackUnsupported(
+    @SerialName("unsupported_method")
+    val unsupportedMethod: String,
+): ChallengeFeedback()
+
+@Serializable
+@SerialName("rate-limit-exceeded")
+class ChallengeFeedbackRateLimitExceeded: ChallengeFeedback()
+
+@Serializable
+@SerialName("iban-instructions")
+data class ChallengeFeedbackBankTransferRequired(
+    @SerialName("challenge_amount")
+    val challengeAmount: Amount,
+    @SerialName("target_iban")
+    val targetIban: String,
+    @SerialName("target_business_name")
+    val targetBusinessName: String,
+    @SerialName("wire_transfer_subject")
+    val wireTransferSubject: String,
+    @SerialName("answer_code")
+    val answerCode: Int,
+): ChallengeFeedback()
+
+@Serializable
+@SerialName("server-failure")
+class ChallengeFeedbackServerFailure(
+    // TODO: http_status
+    // TODO: error_response
+): ChallengeFeedback()
+
+@Serializable
+@SerialName("truth-unknown")
+class ChallengeFeedbackTruthUnknown: ChallengeFeedback()
+
+@Serializable
+@SerialName("taler-payment")
+class ChallengeFeedbackTalerPaymentRequired(
+    @SerialName("taler_pay_uri")
+    val talerPayUri: String,
+    val provider: String,
+    @SerialName("payment_secret")
+    val paymentSecret: String,
+): ChallengeFeedback()
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/models/RecoveryDocument.kt b/anastasis/src/main/java/net/taler/anastasis/models/RecoveryDocument.kt
new file mode 100644
index 0000000..c39acbe
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/models/RecoveryDocument.kt
@@ -0,0 +1,57 @@
+package net.taler.anastasis.models
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+enum class ChallengeType {
+    @SerialName("question")
+    Question,
+
+    @SerialName("sms")
+    Sms,
+
+    @SerialName("email")
+    Email,
+
+    @SerialName("post")
+    Post,
+
+    @SerialName("totp")
+    Totp,
+
+    @SerialName("iban")
+    Iban;
+}
+
+@Serializable
+data class RecoveryDocument(
+    @SerialName("secret_name")
+    val secretName: String? = null,
+    @SerialName("encrypted_core_secret")
+    val encryptedCoreSecret: String,
+    @SerialName("escrow_methods")
+    val escrowMethods: List<EscrowMethod>,
+    val policies: List<DecryptionPolicy>,
+)
+
+@Serializable
+data class DecryptionPolicy(
+    val salt: String,
+    @SerialName("master_key")
+    val masterKey: String,
+    val uuids: List<String>,
+)
+
+@Serializable
+data class EscrowMethod(
+    val url: String,
+    @SerialName("escrow_type")
+    val escrowType: ChallengeType,
+    // TODO: uuid
+    // TODO: truth_key
+    // TODO: question_salt
+    @SerialName("provider_salt")
+    val providerSalt: String,
+    val instructions: String,
+)
\ 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
new file mode 100644
index 0000000..85494f0
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/models/ReducerState.kt
@@ -0,0 +1,395 @@
+package net.taler.anastasis.models
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonClassDiscriminator
+import net.taler.common.Amount
+import net.taler.common.Timestamp
+
+@OptIn(ExperimentalSerializationApi::class)
+@Serializable
+@JsonClassDiscriminator("reducer_type")
+abstract class ReducerState
+
+@Serializable
+data class ContinentInfo(
+    val name: String,
+)
+
+@Serializable
+data class CountryInfo(
+    val code: String,
+    val name: String,
+    val continent: String,
+)
+
+@Serializable
+data class Policy(
+    val methods: List<PolicyMethod>,
+) {
+    @Serializable
+    data class PolicyMethod(
+        @SerialName("authentication_method")
+        val authenticationMethod: Int,
+        val provider: String
+    )
+}
+
+@Serializable
+data class PolicyProvider(
+    @SerialName("provider_url")
+    val providerUrl: String,
+)
+
+@Serializable
+data class SuccessDetail(
+    @SerialName("policy_version")
+    val policyVersion: Int,
+    @SerialName("policy_expiration")
+    val policyExpiration: Timestamp,
+)
+
+@Serializable
+data class CoreSecret(
+    val mime: String,
+    val value: String,
+    val filename: String? = null,
+)
+
+@Serializable
+@SerialName("backup")
+data class ReducerStateBackup(
+    @SerialName("backup_state")
+    val backupState: BackupStates,
+    val continents: List<ContinentInfo>? = null,
+    val countries: List<CountryInfo>? = null,
+    @SerialName("identity_attributes")
+    val identityAttributes: Map<String, String>? = null,
+    @SerialName("authentication_providers")
+    val authenticationProviders: Map<String, AuthenticationProviderStatus>? = null,
+    @SerialName("authentication_methods")
+    val authenticationMethods: List<AuthMethod>? = null,
+    @SerialName("required_attributes")
+    val requiredAttributes: List<UserAttributeSpec>? = null,
+    @SerialName("selected_continent")
+    val selectedContinent: String? = null,
+    @SerialName("selected_country")
+    val selectedCountry: String? = null,
+    @SerialName("secret_name")
+    val secretName: String? = null,
+    val policies: List<Policy>? = null,
+    @SerialName("recovery_data")
+    val recoveryData: RecoveryData? = null,
+    @SerialName("policy_providers")
+    val policyProviders: List<PolicyProvider>? = null,
+    @SerialName("success_details")
+    val successDetails: Map<String, SuccessDetail>? = null,
+    val payments: List<String>? = null,
+    @SerialName("policy_payment_requests")
+    val policyPaymentRequests: List<PolicyPaymentRequest>? = null,
+    @SerialName("core_secret")
+    val coreSecret: CoreSecret? = null,
+    val expiration: Timestamp? = null,
+    @SerialName("upload_fees")
+    val uploadFees: List<UploadFee>? = null,
+    @SerialName("truth_upload_payment_secrets")
+    val truthUploadPaymentSecrets: Map<String, String>? = null,
+): ReducerState() {
+    @Serializable
+    data class RecoveryData(
+        @SerialName("truth_metadata")
+        val truthMetadata: Map<String, TruthMetaData>,
+        @SerialName("recovery_document")
+        val recoveryDocument: RecoveryDocument,
+    )
+
+    @Serializable
+    data class PolicyPaymentRequest(
+        val payto: String,
+        val provider: String,
+    )
+
+    @Serializable
+    data class UploadFee(
+        val fee: Amount,
+    )
+}
+
+@Serializable
+data class AuthMethod(
+    val type: String,
+    val instructions: String,
+    val challenge: String,
+    @SerialName("mime_type")
+    val mimeType: String? = null,
+)
+
+@Serializable
+data class ChallengeInfo(
+    val instructions: String,
+    val type: String,
+    val uuid: String,
+)
+
+@Serializable
+data class UserAttributeSpec(
+    val label: String,
+    val name: String,
+    val type: String,
+    val uuid: String,
+    val widget: String,
+    val optional: Boolean? = null,
+    @SerialName("validation-regex")
+    val validationRegex: String?,
+    @SerialName("validation-logic")
+    val validationLogic: String?,
+    val autocomplete: String? = null,
+)
+
+@Serializable
+data class RecoveryInternalData(
+    @SerialName("secret_name")
+    val secretName: String,
+    @SerialName("provider_url")
+    val providerUrl: String,
+    val version: Int,
+)
+
+@Serializable
+data class RecoveryInformation(
+    val challenges: List<ChallengeInfo>,
+    val policies: List<List<Policy>>,
+) {
+    @Serializable
+    data class Policy(
+        val uuid: String,
+    )
+}
+
+@Serializable
+@SerialName("recovery")
+data class ReducerStateRecovery(
+    val recoveryState: RecoveryStates,
+    @SerialName("identity_attributes")
+    val identityAttributes: Map<String, String>? = null,
+    val continents: List<ContinentInfo>? = null,
+    val countries: List<CountryInfo>? = null,
+    @SerialName("selected_continent")
+    val selectedContinent: String? = null,
+    @SerialName("selected_country")
+    val selectedCountry: String? = null,
+    @SerialName("required_attributes")
+    val requiredAttributes: List<UserAttributeSpec>? = null,
+    @SerialName("recovery_information")
+    val recoveryInformation: RecoveryInformation? = null,
+    @SerialName("recovery_document")
+    val recoveryDocument: RecoveryInternalData? = null,
+    @SerialName("verbatim_recovery_document")
+    val verbatimRecoveryDocument: RecoveryDocument? = null,
+    @SerialName("selected_challenge_uuid")
+    val selectedChallengeUuid: String? = null,
+    @SerialName("selected_version")
+    val selectedVersion: SelectedVersionInfo? = null,
+    @SerialName("challenge_feedback")
+    val challengeFeedback: Map<String, ChallengeFeedback>? = null,
+    // TODO: recovered_key_shares
+    val coreSecret: CoreSecret? = null,
+    @SerialName("authentication_providers")
+    val authenticationProviders: Map<String, AuthenticationProviderStatus>,
+): ReducerState()
+
+@Serializable
+data class TruthMetaData(
+    val uuid: String,
+    @SerialName("key_share")
+    val keyShare: String,
+    @SerialName("policy_index")
+    val policyIndex: Int,
+    @SerialName("pol_method_index")
+    val polMethodIndex: Int,
+    val nonce: String,
+    @SerialName("truth_key")
+    val truthKey: String,
+    @SerialName("master_salt")
+    val masterSalt: String,
+)
+
+@Serializable
+@SerialName("error")
+data class ReducerStateError(
+    val code: Int,
+    val hint: String? = null,
+    val detail: String? = null,
+): ReducerState()
+
+@Serializable
+enum class BackupStates {
+    @SerialName("CONTINENT_SELECTING")
+    ContinentSelecting,
+
+    @SerialName("COUNTRY_SELECTING")
+    CountrySelecting,
+
+    @SerialName("USER_ATTRIBUTES_COLLECTING")
+    UserAttributesCollecting,
+
+    @SerialName("AUTHENTICATIONS_EDITING")
+    AuthenticationsEditing,
+
+    @SerialName("POLICIES_REVIEWING")
+    PoliciesReviewing,
+
+    @SerialName("SECRET_EDITING")
+    SecretEditing,
+
+    @SerialName("TRUTHS_PAYING")
+    TruthsPaying,
+
+    @SerialName("POLICIES_PAYING")
+    PoliciesPaying,
+
+    @SerialName("BACKUP_FINISHED")
+    BackupFinished;
+}
+
+@Serializable
+enum class RecoveryStates {
+    @SerialName("CONTINENT_SELECTING")
+    ContinentSelecting,
+
+    @SerialName("COUNTRY_SELECTING")
+    CountrySelecting,
+
+    @SerialName("USER_ATTRIBUTES_COLLECTING")
+    UserAttributesCollecting,
+
+    @SerialName("SECRET_SELECTING")
+    SecretSelecting,
+
+    @SerialName("CHALLENGE_SELECTING")
+    ChallengeSelecting,
+
+    @SerialName("CHALLENGE_PAYING")
+    ChallengePaying,
+
+    @SerialName("CHALLENGE_SOLVING")
+    ChallengeSolving,
+
+    @SerialName("RECOVERY_FINISHED")
+    RecoveryFinished;
+}
+
+@Serializable
+data class MethodSpec(
+    val type: String,
+    @SerialName("usage_fee")
+    val usageFee: String,
+)
+
+@Serializable
+@SerialName("not-contacted")
+class AuthenticationProviderStatusNotContacted: AuthenticationProviderStatus()
+
+@Serializable
+@SerialName("ok")
+data class AuthenticationProviderStatusOk(
+    @SerialName("annual_fee")
+    val annualFee: String,
+    @SerialName("business_name")
+    val businessName: String,
+    val currency: String,
+    @SerialName("http_status")
+    val httpStatus: Int,
+    @SerialName("liability_limit")
+    val liabilityLimit: String,
+    @SerialName("provider_salt")
+    val providerSalt: String,
+    @SerialName("storage_limit_in_megabytes")
+    val storageLimitInMegabytes: Int,
+    @SerialName("truth_upload_fee")
+    val truthUploadFee: String,
+    val methods: List<MethodSpec>,
+): AuthenticationProviderStatus()
+
+@Serializable
+@SerialName("disabled")
+class AuthenticationProviderStatusDisabled: AuthenticationProviderStatus()
+
+@Serializable
+@SerialName("error")
+data class AuthenticationProviderStatusError(
+    @SerialName("http_status")
+    val httpStatus: Int? = null,
+    val code: Int,
+    val hint: String? = null,
+): AuthenticationProviderStatus()
+
+@OptIn(ExperimentalSerializationApi::class)
+@Serializable
+@JsonClassDiscriminator("status")
+abstract 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
+
+// TODO: SolveChallengeHashRequest
+
+// TODO: PolicyMember
+
+// TODO: ActionArgsAddPolicy
+
+// TODO: ActionArgsUpdateExpiration
+
+// TODO: ActionArgsUpdateExpiration
+
+@Serializable
+data class SelectedVersionInfoProviders(
+    val url: String,
+    val version: Int,
+)
+
+@Serializable
+data class SelectedVersionInfo(
+    val attributeMask: Int,
+    val providers: SelectedVersionInfoProviders,
+)
+
+// TODO: ActionArgsChangeVersion
+
+// TODO: ActionArgsUpdatePolicy
+
+// TODO: DiscoveryCursor
+
+// TODO: PolicyMetaInfo
+
+// TODO: AggregatedPolicyMetaInfo
+
+// TODO: DiscoveryResult
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupContinentScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupContinentScreen.kt
new file mode 100644
index 0000000..9638ba2
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupContinentScreen.kt
@@ -0,0 +1,76 @@
+package net.taler.anastasis.ui.backup
+
+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.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.navigation.NavController
+import androidx.navigation.compose.rememberNavController
+import net.taler.anastasis.R
+import net.taler.anastasis.Routes
+import net.taler.anastasis.models.ContinentInfo
+import net.taler.anastasis.ui.reusable.components.Picker
+import net.taler.anastasis.ui.reusable.pages.WizardPage
+import net.taler.anastasis.ui.theme.LocalSpacing
+
+@Composable
+fun BackupContinentScreen(
+    navController: NavController,
+    continents: List<ContinentInfo>,
+    onSelectContinent: (continent: ContinentInfo) -> Unit,
+) {
+    WizardPage(
+        title = stringResource(R.string.backup_country_title),
+        navigationIcon = {
+            IconButton(onClick = {
+                navController.navigate(Routes.Home.route)
+            }) {
+                Icon(Icons.Default.ArrowBack, "back")
+            }
+        },
+        showPrev = false,
+        onNextClicked = {
+            navController.navigate(Routes.BackupCountry.route)
+        },
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(LocalSpacing.current.medium),
+            verticalArrangement = Arrangement.Top,
+        ) {
+            Picker(
+                label = stringResource(R.string.continent),
+                options = continents.map { it.name }.toSet(),
+                onOptionChanged = { option ->
+                    continents.find { it.name == option }?.let { continent ->
+                        onSelectContinent(continent)
+                    }
+                },
+            )
+        }
+    }
+}
+
+@Composable
+@Preview
+fun BackupContinentScreenPreview() {
+    val navController = rememberNavController()
+    BackupContinentScreen(
+        navController = navController,
+        continents = listOf(
+            ContinentInfo("Europe"),
+            ContinentInfo("India"),
+            ContinentInfo("Asia"),
+            ContinentInfo("North America")),
+        onSelectContinent = {},
+    )
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupCountryScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupCountryScreen.kt
new file mode 100644
index 0000000..dfb974f
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupCountryScreen.kt
@@ -0,0 +1,77 @@
+package net.taler.anastasis.ui.backup
+
+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.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.navigation.NavController
+import androidx.navigation.compose.rememberNavController
+import net.taler.anastasis.R
+import net.taler.anastasis.Routes
+import net.taler.anastasis.models.CountryInfo
+import net.taler.anastasis.ui.reusable.components.Picker
+import net.taler.anastasis.ui.reusable.pages.WizardPage
+import net.taler.anastasis.ui.theme.LocalSpacing
+
+@Composable
+fun BackupCountryScreen(
+    navController: NavController,
+    countries: List<CountryInfo>,
+    onSelectCountry: (country: CountryInfo) -> Unit,
+) {
+    WizardPage(
+        title = stringResource(R.string.backup_country_title),
+        navigationIcon = {
+            IconButton(onClick = {
+                navController.navigate(Routes.Home.route)
+            }) {
+                Icon(Icons.Default.ArrowBack, "back")
+            }
+        },
+        onPrevClicked = {
+            navController.navigate(Routes.BackupContinent.route)
+        },
+        onNextClicked = {
+            navController.navigate(Routes.BackupUserAttributes.route)
+        },
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(LocalSpacing.current.medium),
+            verticalArrangement = Arrangement.Top,
+        ) {
+            Picker(
+                label = stringResource(R.string.country),
+                options = countries.map { it.name }.toSet(),
+                onOptionChanged = { option ->
+                    countries.find { it.name == option }?.let { country ->
+                        onSelectCountry(country)
+                    }
+                },
+            )
+        }
+    }
+}
+
+@Composable
+@Preview
+fun BackupCountryScreenPreview() {
+    val navController = rememberNavController()
+    BackupCountryScreen(
+        navController = navController,
+        countries = listOf(
+            CountryInfo("ch", "Switzerland", "Europe"),
+            CountryInfo("de", "Germany", "Europe"),
+        ),
+        onSelectCountry = {},
+    )
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupUserAttributesScreen.kt b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupUserAttributesScreen.kt
new file mode 100644
index 0000000..bbd0147
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/backup/BackupUserAttributesScreen.kt
@@ -0,0 +1,141 @@
+/*
+ * 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.Arrangement
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+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
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateMapOf
+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 androidx.navigation.NavController
+import androidx.navigation.compose.rememberNavController
+import net.taler.anastasis.R
+import net.taler.anastasis.Routes
+import net.taler.anastasis.models.UserAttributeSpec
+import net.taler.anastasis.ui.reusable.components.DatePickerField
+import net.taler.anastasis.ui.reusable.pages.WizardPage
+import net.taler.anastasis.ui.theme.LocalSpacing
+import java.util.Calendar
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun BackupUserAttributesScreen(
+    navController: NavController,
+    userAttributes: List<UserAttributeSpec>,
+) {
+    val values = remember { mutableStateMapOf<String, String>() }
+
+    WizardPage(
+        title = stringResource(R.string.backup_user_attributes_title),
+        navigationIcon = {
+            IconButton(onClick = {
+                navController.navigate(Routes.Home.route)
+            }) {
+                Icon(Icons.Default.ArrowBack, "back")
+            }
+        },
+        onPrevClicked = {
+            navController.navigate(Routes.BackupCountry.route)
+        },
+        onNextClicked = {},
+    ) {
+        LazyColumn(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(LocalSpacing.current.medium),
+            verticalArrangement = Arrangement.Top,
+        ) {
+            items(items = userAttributes) { attr ->
+                when (attr.type) {
+                    "string" -> OutlinedTextField(
+                        modifier = Modifier.fillMaxWidth(),
+                        value = values[attr.uuid] ?: "",
+                        onValueChange = { values[attr.uuid] = it },
+                        label = { Text(attr.label) },
+                    )
+                    "date" -> @Composable {
+                        val cal = Calendar.getInstance()
+                        var yy by remember { mutableStateOf(cal.get(Calendar.YEAR)) }
+                        var mm by remember { mutableStateOf(cal.get(Calendar.MONTH)) }
+                        var dd by remember { mutableStateOf(cal.get(Calendar.DAY_OF_MONTH)) }
+                        DatePickerField(
+                            modifier = Modifier.fillMaxWidth(),
+                            label = attr.label,
+                            yy = yy,
+                            mm = mm,
+                            dd = dd,
+                            onDateSelected = { y, m, d ->
+                                yy = y
+                                mm = m
+                                dd = d
+                            },
+                        )
+                    }
+                }
+                Spacer(Modifier.height(LocalSpacing.current.small))
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+fun BackupUserAttributesScreenPreview() {
+    val navController = rememberNavController()
+    BackupUserAttributesScreen(
+        navController = navController,
+        userAttributes = listOf(
+            UserAttributeSpec(
+                type = "string",
+                name = "full_name",
+                label = "Full name",
+                widget = "anastasis_gtk_ia_full_name",
+                uuid = "9e8f463f-575f-42cb-85f3-759559997331",
+                validationLogic = null,
+                validationRegex = null,
+            ),
+            UserAttributeSpec(
+                type = "date",
+                name = "birthdate",
+                label = "Birthdate",
+                uuid = "83d655c7-bdb6-484d-904e-80c1058c8854",
+                widget = "anastasis_gtk_ia_birthdate",
+                validationLogic = null,
+                validationRegex = null,
+            ),
+        ),
+    )
+}
\ No newline at end of file
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
new file mode 100644
index 0000000..98a70b4
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/home/HomeScreen.kt
@@ -0,0 +1,94 @@
+package net.taler.anastasis.ui.home
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Download
+import androidx.compose.material.icons.outlined.Restore
+import androidx.compose.material.icons.outlined.Upload
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.LargeTopAppBar
+import androidx.compose.material3.Scaffold
+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.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavController
+import androidx.navigation.compose.rememberNavController
+import net.taler.anastasis.R
+import net.taler.anastasis.Routes
+import net.taler.anastasis.ui.reusable.components.ActionCard
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun HomeScreen(
+    navController: NavController,
+) {
+    Scaffold(
+        topBar = {
+            LargeTopAppBar(
+                title = {
+                    Text(stringResource(R.string.home_title))
+                },
+            )
+        }
+    ) {
+        Column(
+            modifier = Modifier
+                .padding(it)
+                .padding(16.dp),
+            verticalArrangement = Arrangement.SpaceEvenly,
+        ) {
+            // Backup
+            ActionCard(
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(bottom = 8.dp)
+                    .fillMaxWidth(),
+                icon = { Icon(Icons.Outlined.Upload, null) },
+                headline = stringResource(R.string.backup_secret),
+                onClick = {
+                    navController.navigate(Routes.BackupContinent.route)
+                },
+            )
+
+            // Recovery
+            ActionCard(
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(bottom = 8.dp)
+                    .fillMaxWidth(),
+                icon = { Icon(Icons.Outlined.Download, null) },
+                headline = stringResource(R.string.recover_secret),
+                onClick = {
+                    navController.navigate(Routes.RecoveryCountry.route)
+                },
+            )
+
+            // Restore session
+            ActionCard(
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(bottom = 8.dp)
+                    .fillMaxWidth(),
+                icon = { Icon(Icons.Outlined.Restore, null) },
+                headline = stringResource(R.string.restore_session),
+                onClick = {
+                    navController.navigate(Routes.RestoreInit.route)
+                },
+            )
+        }
+    }
+}
+
+@Composable
+@Preview
+fun HomeScreenPreview() {
+    val navController = rememberNavController()
+    HomeScreen(navController = navController)
+}
\ No newline at end of file
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
new file mode 100644
index 0000000..72d3cbb
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/ActionCard.kt
@@ -0,0 +1,73 @@
+package net.taler.anastasis.ui.reusable.components
+
+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.material.icons.Icons
+import androidx.compose.material.icons.filled.KeyboardArrowUp
+import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ActionCard(
+    modifier: Modifier = Modifier,
+    icon: (@Composable () -> Unit)? = null,
+    headline: String,
+    subhead: String? = null,
+    body: String? = null,
+    onClick: () -> Unit,
+) {
+    ElevatedCard(
+        modifier = modifier,
+        onClick = onClick,
+
+    ) {
+        Column(modifier = Modifier.padding(16.dp)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                if (icon != null) {
+                    icon()
+                    Spacer(modifier = Modifier.width(12.dp))
+                }
+                Text(headline, style = MaterialTheme.typography.titleLarge)
+            }
+            subhead?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.bodyLarge,
+                    modifier = Modifier.padding(top = 5.dp)
+                )
+            }
+            body?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.bodySmall,
+                    modifier = Modifier.padding(top = 5.dp)
+                )
+            }
+        }
+    }
+}
+
+@Composable
+@Preview
+fun ActionCardPreview() {
+    ActionCard(
+        modifier = Modifier.fillMaxWidth(),
+        icon = { Icon(Icons.Default.KeyboardArrowUp, "arrowUp") },
+        headline = "Headline",
+        subhead = "Subhead",
+        body = "Supporting text",
+    ) {}
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DatePickerField.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DatePickerField.kt
new file mode 100644
index 0000000..545d5b1
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DatePickerField.kt
@@ -0,0 +1,109 @@
+/*
+ * 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 android.app.DatePickerDialog
+import android.widget.DatePicker
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+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.platform.LocalContext
+import androidx.compose.ui.tooling.preview.Preview
+import kotlinx.datetime.LocalDate
+import net.taler.anastasis.Utils
+import net.taler.anastasis.ui.theme.LocalSpacing
+import java.util.Calendar
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DatePickerField(
+    modifier: Modifier = Modifier,
+    label: String,
+    yy: Int,
+    mm: Int,
+    dd: Int,
+    onDateSelected: (yy: Int, mm: Int, dd: Int) -> Unit,
+) {
+    val dialog = DatePickerDialog(
+        LocalContext.current,
+        { _: DatePicker, y: Int, m: Int, d: Int ->
+            onDateSelected(y, m, d)
+        }, yy, mm, dd,
+    )
+
+    OutlinedTextField(
+        modifier = modifier,
+        value = Utils.formatDate(LocalDate(yy, mm, dd)),
+        label = { Text(label) },
+        onValueChange = { },
+        trailingIcon = {
+            Button(
+                modifier = Modifier.padding(end = LocalSpacing.current.medium),
+                onClick = { dialog.show() },
+            ) {
+                Icon(
+                    Icons.Default.Edit,
+                    contentDescription = null,
+                    modifier = Modifier.size(ButtonDefaults.IconSize),
+                )
+            }
+        },
+        textStyle = LocalTextStyle.current.copy( // show text as if not disabled
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        ),
+        enabled = false,
+        readOnly = true,
+    )
+}
+
+@Preview
+@Composable
+fun DatePickerFieldPreview() {
+    val cal = Calendar.getInstance()
+    var yy by remember { mutableStateOf(cal.get(Calendar.YEAR)) }
+    var mm by remember { mutableStateOf(cal.get(Calendar.MONTH)) }
+    var dd by remember { mutableStateOf(cal.get(Calendar.DAY_OF_MONTH)) }
+    Surface {
+        DatePickerField(
+            label = "Birthdate",
+            yy = yy,
+            mm = mm,
+            dd = dd,
+            onDateSelected = { y, m, d ->
+                yy = y
+                mm = m
+                dd = d
+            },
+        )
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DropdownTextField.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DropdownTextField.kt
new file mode 100644
index 0000000..0fe727a
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/DropdownTextField.kt
@@ -0,0 +1,129 @@
+/*
+ * 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.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExposedDropdownMenuDefaults
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+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.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.layout.onGloballyPositioned
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.toSize
+import androidx.compose.ui.window.PopupProperties
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DropdownTextField(
+    modifier: Modifier = Modifier,
+    label: String,
+    options: Set<String>,
+    onOptionChanged: (String) -> Unit,
+) {
+    var filteredOptions by remember { mutableStateOf(options.toList()) }
+    var inputValue by remember { mutableStateOf(options.first()) }
+    var expanded by remember { mutableStateOf(false) }
+    var size by remember { mutableStateOf(Size.Zero) }
+    val focusRequester = remember { FocusRequester() }
+
+    Box(
+        modifier = Modifier
+            .wrapContentSize(Alignment.Center)
+            .focusRequester(focusRequester),
+    ) {
+        OutlinedTextField(
+            modifier = modifier
+                .onGloballyPositioned { coordinates ->
+                    size = coordinates.size.toSize()
+                },
+            value = inputValue,
+            onValueChange = { value ->
+                inputValue = value
+                expanded = true
+                filteredOptions = options.filter { it.contains(value) }
+            },
+            singleLine = true,
+            label = { Text(label) },
+            trailingIcon = {
+                Box(modifier = Modifier.clickable { expanded = !expanded }) {
+                    ExposedDropdownMenuDefaults.TrailingIcon(
+                        expanded = expanded,
+                    )
+                }
+            },
+            colors = ExposedDropdownMenuDefaults.textFieldColors()
+        )
+
+        if (filteredOptions.isNotEmpty()) {
+            DropdownMenu(
+                expanded = expanded,
+                onDismissRequest = {
+                    expanded = false
+                },
+                /*
+                 * TODO: we should NOT disable focus, but this will be necessary
+                 *  until Google fixes ExposedDropdownMenuBox focus crash.
+                 */
+                properties = PopupProperties(focusable = false),
+                modifier = Modifier
+                    .width(with(LocalDensity.current) { size.width.toDp() }),
+            ) {
+                filteredOptions.forEach { s ->
+                    DropdownMenuItem(
+                        text = {
+                            Text(text = s)
+                        },
+                        onClick = {
+                            inputValue = s
+                            expanded = false
+                            onOptionChanged(s)
+                        }
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+fun DropdownTextFieldComposable() {
+    Surface {
+        DropdownTextField(
+            label = "Continent",
+            options = setOf("Europe", "India", "Asia", "North America"),
+            onOptionChanged = {},
+        )
+    }
+}
\ 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
new file mode 100644
index 0000000..4c649a6
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
@@ -0,0 +1,99 @@
+/*
+ * 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.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExposedDropdownMenuDefaults
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+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.Alignment
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalSoftwareKeyboardController
+import androidx.compose.ui.tooling.preview.Preview
+import net.taler.anastasis.ui.theme.LocalSpacing
+
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalComposeUiApi::class)
+@Composable
+fun Picker(
+    modifier: Modifier = Modifier,
+    label: String,
+    options: Set<String>,
+    onOptionChanged: (String) -> Unit,
+) {
+    var filteredOptions by remember { mutableStateOf(options.toList()) }
+    var inputValue by remember { mutableStateOf(options.first()) }
+    val keyboardController = LocalSoftwareKeyboardController.current
+
+    Column(
+        modifier = modifier
+            .wrapContentSize(Alignment.Center)
+    ) {
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = inputValue,
+            onValueChange = { value ->
+                inputValue = value
+                filteredOptions = options.filter { it.contains(value) }
+            },
+            singleLine = true,
+            label = { Text(label) },
+            colors = ExposedDropdownMenuDefaults.textFieldColors()
+        )
+
+        if (filteredOptions.isNotEmpty()) {
+            Spacer(Modifier.height(LocalSpacing.current.medium))
+            LazyColumn(
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                items(items = filteredOptions) {
+                    DropdownMenuItem(
+                        text = { Text(it) },
+                        onClick = {
+                            inputValue = it
+                            keyboardController?.hide()
+                            onOptionChanged(it)
+                        },
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+fun PickerPreview() {
+    Picker(
+        label = "Country",
+        options = setOf("Europe", "India", "Asia", "North America"),
+        onOptionChanged = {},
+    )
+}
\ No newline at end of file
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
new file mode 100644
index 0000000..77b467a
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/pages/WizardPage.kt
@@ -0,0 +1,117 @@
+package net.taler.anastasis.ui.reusable.pages
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.filled.NavigateBefore
+import androidx.compose.material.icons.filled.NavigateNext
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Divider
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LargeTopAppBar
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun WizardPage(
+    modifier: Modifier = Modifier,
+    title: String,
+    navigationIcon: @Composable () -> Unit = {},
+    showNext: Boolean = true,
+    showPrev: Boolean = true,
+    onNextClicked: () -> Unit = {},
+    onPrevClicked: () -> Unit = {},
+    content: @Composable () -> Unit,
+) {
+    Scaffold(
+        topBar = {
+            LargeTopAppBar(
+                title = { Text(title) },
+                navigationIcon = navigationIcon,
+            )
+        },
+    ) {
+        Column(
+            modifier = modifier.padding(it),
+        ) {
+            Box(modifier = Modifier
+                .weight(1f)
+                .fillMaxWidth()) {
+                content()
+            }
+            Divider()
+            Row(
+                modifier = Modifier.padding(16.dp),
+                horizontalArrangement = Arrangement.SpaceBetween,
+            ) {
+                if (showPrev) {
+                    TextButton(
+                        onClick = onPrevClicked,
+                    ) {
+                        Icon(
+                            Icons.Default.NavigateBefore,
+                            contentDescription = null,
+                            modifier = Modifier.size(ButtonDefaults.IconSize),
+                        )
+                        Spacer(Modifier.size(ButtonDefaults.IconSpacing))
+                        Text("Previous")
+                    }
+                }
+
+                Spacer(modifier = Modifier.weight(1f))
+
+                if (showNext) {
+                    Button(
+                        onClick = onNextClicked,
+                    ) {
+                        Text("Next")
+                        Spacer(Modifier.size(ButtonDefaults.IconSpacing))
+                        Icon(
+                            Icons.Default.NavigateNext,
+                            contentDescription = null,
+                            modifier = Modifier.size(ButtonDefaults.IconSize),
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+@Preview
+fun WizardPagePreview() {
+    WizardPage(
+        title = "Title",
+        navigationIcon = {
+            IconButton(onClick = {}) {
+                Icon(Icons.Default.ArrowBack, null)
+            }
+        },
+    ) {
+        Box (
+            modifier = Modifier.fillMaxSize(),
+            contentAlignment = Alignment.Center,
+        ) {
+            Text("This is a wizard page")
+        }
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/theme/Color.kt b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Color.kt
new file mode 100644
index 0000000..3560f1b
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Color.kt
@@ -0,0 +1,11 @@
+package net.taler.anastasis.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/theme/Spacing.kt b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Spacing.kt
new file mode 100644
index 0000000..8cffbba
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Spacing.kt
@@ -0,0 +1,32 @@
+/*
+ * 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.theme
+
+import androidx.compose.runtime.compositionLocalOf
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+
+data class Spacing(
+    val default: Dp = 0.dp,
+    val extraSmall: Dp = 4.dp,
+    val small: Dp = 8.dp,
+    val medium: Dp = 16.dp,
+    val large: Dp = 32.dp,
+    val extraLarge: Dp = 64.dp,
+)
+
+val LocalSpacing = compositionLocalOf { Spacing() }
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/theme/Theme.kt b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Theme.kt
new file mode 100644
index 0000000..2c69746
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Theme.kt
@@ -0,0 +1,73 @@
+package net.taler.anastasis.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun AnastasisTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+    val view = LocalView.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            val window = (view.context as Activity).window
+            window.statusBarColor = colorScheme.primary.toArgb()
+            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
+        }
+    }
+
+    CompositionLocalProvider(LocalSpacing provides Spacing()) {
+        MaterialTheme(
+            colorScheme = colorScheme,
+            typography = Typography,
+            content = content
+        )
+    }
+}
\ No newline at end of file
diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/theme/Type.kt b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Type.kt
new file mode 100644
index 0000000..8fac184
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/theme/Type.kt
@@ -0,0 +1,34 @@
+package net.taler.anastasis.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
\ No newline at end of file
diff --git a/anastasis/src/main/res/drawable-v24/ic_launcher_foreground.xml b/anastasis/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 0000000..2b068d1
--- /dev/null
+++ b/anastasis/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
\ No newline at end of file
diff --git a/anastasis/src/main/res/drawable/ic_launcher_background.xml b/anastasis/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 0000000..07d5da9
--- /dev/null
+++ b/anastasis/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
diff --git a/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 0000000..6f3b755
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file
diff --git a/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
new file mode 100644
index 0000000..6f3b755
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file
diff --git a/anastasis/src/main/res/mipmap-hdpi/ic_launcher.webp b/anastasis/src/main/res/mipmap-hdpi/ic_launcher.webp
new file mode 100644
index 0000000..c209e78
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-hdpi/ic_launcher.webp
diff --git a/anastasis/src/main/res/mipmap-hdpi/ic_launcher_round.webp b/anastasis/src/main/res/mipmap-hdpi/ic_launcher_round.webp
new file mode 100644
index 0000000..b2dfe3d
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-hdpi/ic_launcher_round.webp
diff --git a/anastasis/src/main/res/mipmap-mdpi/ic_launcher.webp b/anastasis/src/main/res/mipmap-mdpi/ic_launcher.webp
new file mode 100644
index 0000000..4f0f1d6
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-mdpi/ic_launcher.webp
diff --git a/anastasis/src/main/res/mipmap-mdpi/ic_launcher_round.webp b/anastasis/src/main/res/mipmap-mdpi/ic_launcher_round.webp
new file mode 100644
index 0000000..62b611d
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-mdpi/ic_launcher_round.webp
diff --git a/anastasis/src/main/res/mipmap-xhdpi/ic_launcher.webp b/anastasis/src/main/res/mipmap-xhdpi/ic_launcher.webp
new file mode 100644
index 0000000..948a307
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xhdpi/ic_launcher.webp
diff --git a/anastasis/src/main/res/mipmap-xhdpi/ic_launcher_round.webp b/anastasis/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000..1b9a695
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
diff --git a/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher.webp b/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher.webp
new file mode 100644
index 0000000..28d4b77
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher.webp
diff --git a/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp b/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000..9287f50
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
diff --git a/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher.webp b/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
new file mode 100644
index 0000000..aa7d642
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
diff --git a/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp b/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000..9126ae3
--- /dev/null
+++ b/anastasis/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
diff --git a/anastasis/src/main/res/values/colors.xml b/anastasis/src/main/res/values/colors.xml
new file mode 100644
index 0000000..f8c6127
--- /dev/null
+++ b/anastasis/src/main/res/values/colors.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
\ No newline at end of file
diff --git a/anastasis/src/main/res/values/strings.xml b/anastasis/src/main/res/values/strings.xml
new file mode 100644
index 0000000..9e974f2
--- /dev/null
+++ b/anastasis/src/main/res/values/strings.xml
@@ -0,0 +1,15 @@
+<resources>
+    <string name="app_name">Anastasis</string>
+
+    <!-- HomeScreen -->
+    <string name="home_title">Home</string>
+    <string name="backup_secret">Backup a secret</string>
+    <string name="recover_secret">Recover a secret</string>
+    <string name="restore_session">Restore session</string>
+
+    <string name="backup_country_title">Where do you live?</string>
+    <string name="country">Country</string>
+    <string name="continent">Continent</string>
+    <string name="backup_user_attributes_title">Who are you?</string>
+    <string name="backup_auth_methods_title">Authentication methods</string>
+</resources>
\ No newline at end of file
diff --git a/anastasis/src/main/res/values/themes.xml b/anastasis/src/main/res/values/themes.xml
new file mode 100644
index 0000000..a5484d9
--- /dev/null
+++ b/anastasis/src/main/res/values/themes.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.Anastasis" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>
\ No newline at end of file
diff --git a/anastasis/src/main/res/xml/backup_rules.xml b/anastasis/src/main/res/xml/backup_rules.xml
new file mode 100644
index 0000000..fa0f996
--- /dev/null
+++ b/anastasis/src/main/res/xml/backup_rules.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>
\ No newline at end of file
diff --git a/anastasis/src/main/res/xml/data_extraction_rules.xml b/anastasis/src/main/res/xml/data_extraction_rules.xml
new file mode 100644
index 0000000..9ee9997
--- /dev/null
+++ b/anastasis/src/main/res/xml/data_extraction_rules.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 426ee87..8878ea0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,6 +22,10 @@ buildscript {
     }
 }
 
+plugins {
+    id 'com.google.dagger.hilt.android' version '2.44' apply false
+}
+
 allprojects {
     repositories {
         google()
diff --git a/settings.gradle b/settings.gradle
index 7ed4525..a9660ce 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,3 +1,3 @@
-include ':cashier', ':merchant-terminal', ':wallet'
+include ':cashier', ':merchant-terminal', ':wallet', ':anastasis'
 include ':taler-kotlin-android'
 include ':merchant-lib'