Merge all three apps into one repository

29 files changed, 1194 insertions, 0 deletions

diff --git a/cashier/src/main/res/drawable-w550dp/ic_arrow.xml b/cashier/src/main/res/drawable-w550dp/ic_arrow.xml
new file mode 100644
index 0000000..331ea06
--- /dev/null
+++ b/cashier/src/main/res/drawable-w550dp/ic_arrow.xml
@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:alpha="0.56"
+    android:tint="@color/green"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M20,5.41 L18.59,4 7,15.59V9H5V19H15V17H8.41" />
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_arrow.xml b/cashier/src/main/res/drawable/ic_arrow.xml
new file mode 100644
index 0000000..d7578bd
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_arrow.xml
@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:alpha="0.56"
+    android:tint="@color/green"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M5,5.41 L6.41,4 18,15.59V9h2V19H10v-2h6.59" />
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_check_circle.xml b/cashier/src/main/res/drawable/ic_check_circle.xml
new file mode 100644
index 0000000..d43d6ba
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_check_circle.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:alpha="0.56"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM10,17l-5,-5 1.41,-1.41L10,14.17l7.59,-7.59L19,8l-9,9z" />
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_clear.xml b/cashier/src/main/res/drawable/ic_clear.xml
new file mode 100644
index 0000000..f50fd99
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_clear.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z" />
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_error.xml b/cashier/src/main/res/drawable/ic_error.xml
new file mode 100644
index 0000000..b7e22a0
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_error.xml
@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:alpha="0.56"
+    android:tint="@color/red"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM13,17h-2v-2h2v2zM13,13h-2L11,7h2v6z" />
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_launcher_foreground.xml b/cashier/src/main/res/drawable/ic_launcher_foreground.xml
new file mode 100644
index 0000000..fbaac05
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <group
+      android:translateX="12"
+      android:translateY="12">
+    <path
+        android:pathData="M6,3L6,6L9,6L9,7L6.25,7C5.05,7 4.0508,8 4.0508,9L3.5,16L20.5,16L20,9C19.8,8 18.8008,7 17.8008,7L11,7L11,6L14,6L14,3L6,3zM7,4L13,4L13,5L7,5L7,4zM6,9L8,9L8,10L6,10L6,9zM9,9L11,9L11,10L9,10L9,9zM13,9L18,9L18,11L13,11L13,9zM6,11L8,11L8,12L6,12L6,11zM9,11L11,11L11,12L9,12L9,11zM6,13L8,13L8,14L6,14L6,13zM9,13L11,13L11,14L9,14L9,13zM2,17L2,21L22,21L22,17L2,17zM4.7422,17.291L7.2695,17.291L7.2695,17.7793L6.3574,17.7793L6.3574,20.6777L5.6543,20.6777L5.6543,17.7793L4.7422,17.7793L4.7422,17.291zM11.0078,17.291L12.3613,17.291L12.3613,20.1895L13.0098,20.1895L13.0098,20.6777L10.9238,20.6777L10.9238,20.1895L11.6563,20.1895L11.6563,17.7793L11.0078,17.7793L11.0078,17.291zM8.9688,18.1992C9.092,18.1992 9.2128,18.2081 9.332,18.2266C9.4513,18.245 9.5646,18.2782 9.6719,18.3242C9.7792,18.3703 9.8736,18.4302 9.9531,18.5039C10.0326,18.5745 10.0892,18.6559 10.125,18.748C10.1608,18.8371 10.1797,18.9274 10.1797,19.0195L10.1797,20.6777L9.4746,20.6777L9.4746,20.3828L9.4395,20.4238C9.348,20.519 9.2329,20.5915 9.0938,20.6406C8.9546,20.6898 8.8092,20.7129 8.6582,20.7129C8.531,20.7129 8.4083,20.6978 8.2891,20.6641C8.1698,20.6303 8.066,20.5756 7.9785,20.502C7.8951,20.4252 7.8366,20.3393 7.8008,20.2441C7.765,20.149 7.7461,20.0514 7.7461,19.9531C7.7461,19.8549 7.7688,19.7592 7.8125,19.6641C7.8602,19.5689 7.932,19.4847 8.0273,19.4141C8.1227,19.3434 8.2284,19.2899 8.3477,19.25C8.4669,19.2101 8.5916,19.1814 8.7188,19.166C8.8459,19.1476 8.9743,19.1387 9.1055,19.1387L9.4746,19.1387L9.4746,19.0195C9.4746,18.9551 9.452,18.8951 9.4043,18.8398C9.3606,18.7846 9.2964,18.7461 9.2129,18.7246C9.1334,18.7 9.0522,18.6875 8.9688,18.6875C8.8932,18.6875 8.8177,18.6964 8.7422,18.7148C8.6667,18.7333 8.6024,18.7673 8.5508,18.8164C8.4991,18.8625 8.4651,18.9143 8.4492,18.9727L7.7813,18.834C7.813,18.702 7.8905,18.5849 8.0137,18.4805C8.1369,18.3761 8.2823,18.3036 8.4492,18.2637C8.6201,18.2207 8.7939,18.1992 8.9688,18.1992zM14.9473,18.1992C15.1221,18.1992 15.2921,18.2243 15.4551,18.2734C15.622,18.3226 15.7618,18.3995 15.873,18.5039C15.9883,18.6083 16.0695,18.7246 16.1172,18.8535C16.1649,18.9825 16.1875,19.1149 16.1875,19.25L16.1875,19.7012L14.4121,19.7012C14.416,19.7564 14.4255,19.8119 14.4414,19.8672C14.4613,19.9317 14.4953,19.9924 14.543,20.0508C14.5946,20.106 14.6607,20.149 14.7402,20.1797C14.8197,20.2104 14.9028,20.2266 14.9902,20.2266C15.0737,20.2266 15.1549,20.214 15.2344,20.1895C15.3139,20.1618 15.38,20.1206 15.4316,20.0684C15.4833,20.0131 15.5211,19.9531 15.5449,19.8887L16.1934,20.0781C16.1377,20.2071 16.0509,20.3225 15.9316,20.4238C15.8124,20.5251 15.6689,20.5985 15.502,20.6445C15.335,20.6906 15.1651,20.7129 14.9902,20.7129C14.8154,20.7129 14.6416,20.6906 14.4707,20.6445C14.3038,20.5954 14.1602,20.5212 14.041,20.4199C13.9218,20.3155 13.8368,20.1965 13.7852,20.0645C13.7335,19.9324 13.709,19.7992 13.709,19.6641L13.709,19.25C13.709,19.1149 13.7316,18.9825 13.7793,18.8535C13.827,18.7246 13.9063,18.6083 14.0176,18.5039C14.1328,18.3995 14.2726,18.3226 14.4355,18.2734C14.6025,18.2243 14.7724,18.1992 14.9473,18.1992zM18.502,18.1992C18.6172,18.1992 18.7286,18.2207 18.8359,18.2637C18.9432,18.3036 19.032,18.3599 19.1035,18.4336C19.179,18.5073 19.23,18.5879 19.2578,18.6738L18.6016,18.9121C18.5817,18.8507 18.5383,18.7988 18.4707,18.7559C18.4071,18.7098 18.3335,18.6875 18.25,18.6875C18.1228,18.6875 18.019,18.7304 17.9355,18.8164C17.8561,18.9024 17.8031,18.9935 17.7793,19.0918C17.7594,19.1808 17.75,19.2703 17.75,19.3594L17.75,20.6777L17.0469,20.6777L17.0469,18.2363L17.75,18.2363L17.75,18.6602C17.7778,18.6049 17.8118,18.5502 17.8516,18.498C17.9191,18.409 18.0097,18.3365 18.125,18.2813C18.2442,18.226 18.3708,18.1992 18.502,18.1992zM14.9473,18.6875C14.8638,18.6875 14.7826,18.7045 14.7031,18.7383C14.6276,18.769 14.5691,18.8128 14.5254,18.8711C14.4817,18.9294 14.4514,18.9922 14.4355,19.0566C14.4236,19.1088 14.4161,19.1607 14.4121,19.2129L15.4844,19.2129C15.4804,19.1607 15.4729,19.1088 15.4609,19.0566C15.445,18.9922 15.4148,18.9294 15.3711,18.8711C15.3274,18.8128 15.265,18.769 15.1855,18.7383C15.11,18.7045 15.0307,18.6875 14.9473,18.6875zM9.1055,19.627C9.0101,19.627 8.9157,19.6359 8.8203,19.6543C8.7249,19.6696 8.638,19.7045 8.5625,19.7598C8.487,19.812 8.4492,19.8764 8.4492,19.9531C8.4492,20.0084 8.4719,20.0594 8.5156,20.1055C8.5593,20.1515 8.616,20.1847 8.6875,20.2031C8.759,20.2185 8.8308,20.2266 8.9023,20.2266C9.0057,20.2266 9.1058,20.2068 9.2012,20.1699C9.2966,20.13 9.3664,20.0737 9.4102,20C9.4539,19.9263 9.4746,19.8502 9.4746,19.7734L9.4746,19.627L9.1055,19.627z"
+        android:fillColor="#f9f9f9"
+        tools:ignore="VectorPath" />
+  </group>
+</vector>
diff --git a/cashier/src/main/res/drawable/ic_withdraw.xml b/cashier/src/main/res/drawable/ic_withdraw.xml
new file mode 100644
index 0000000..b694a2b
--- /dev/null
+++ b/cashier/src/main/res/drawable/ic_withdraw.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M3 0V3H0V5H3V8H5V5H8V3H5V0H3M9 3V6H6V9H3V19C3 20.1 3.89 21 5 21H19C20.11 21 21 20.11 21 19V18H12C10.9 18 10 17.11 10 16V8C10 6.9 10.89 6 12 6H21V5C21 3.9 20.11 3 19 3H9M12 8V16H22V8H12M16 10.5C16.83 10.5 17.5 11.17 17.5 12C17.5 12.83 16.83 13.5 16 13.5C15.17 13.5 14.5 12.83 14.5 12C14.5 11.17 15.17 10.5 16 10.5Z" />
+</vector>
diff --git a/cashier/src/main/res/layout-w550dp/fragment_balance.xml b/cashier/src/main/res/layout-w550dp/fragment_balance.xml
new file mode 100644
index 0000000..d04698b
--- /dev/null
+++ b/cashier/src/main/res/layout-w550dp/fragment_balance.xml
@@ -0,0 +1,222 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".BalanceFragment">
+
+    <TextView
+        android:id="@+id/lastTransactionView"
+        style="@style/Widget.MaterialComponents.Snackbar.FullWidth"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimaryDark"
+        android:drawableStart="@drawable/ic_check_circle"
+        android:drawablePadding="8dp"
+        android:drawableTint="?attr/colorOnPrimarySurface"
+        android:gravity="center_vertical"
+        android:padding="8dp"
+        android:textColor="?attr/colorOnPrimarySurface"
+        android:visibility="gone"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="@string/transaction_last_success"
+        tools:visibility="visible" />
+
+    <View
+        android:id="@+id/balanceBackground"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="@color/background"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/lastTransactionView" />
+
+    <TextView
+        android:id="@+id/balanceLabel"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="32dp"
+        android:layout_marginTop="32dp"
+        android:layout_marginEnd="32dp"
+        android:text="@string/balance_current_label"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintBottom_toTopOf="@+id/balanceView"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/lastTransactionView"
+        app:layout_constraintVertical_bias="0.0"
+        app:layout_constraintVertical_chainStyle="packed" />
+
+    <TextView
+        android:id="@+id/balanceView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:gravity="center"
+        android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/balanceLabel"
+        tools:text="100 KUDOS" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="@+id/balanceView"
+        app:layout_constraintEnd_toEndOf="@+id/balanceView"
+        app:layout_constraintStart_toStartOf="@+id/balanceView"
+        app:layout_constraintTop_toTopOf="@+id/balanceView" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintGuide_percent="0.5" />
+
+    <TextView
+        android:id="@+id/introView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:text="@string/withdraw_into"
+        android:textAlignment="center"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/guideline"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button5"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="5"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toStartOf="@+id/button10"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toStartOf="@+id/guideline"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button10"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="10"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toStartOf="@+id/button20"
+        app:layout_constraintStart_toEndOf="@+id/button5"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button20"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="20"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toStartOf="@+id/button50"
+        app:layout_constraintStart_toEndOf="@+id/button10"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button50"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="50"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/button20"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/amountView"
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:hint="@string/withdraw_input_amount"
+        android:visibility="invisible"
+        app:endIconDrawable="@drawable/ic_clear"
+        app:endIconMode="clear_text"
+        app:endIconTint="?attr/colorControlNormal"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/guideline"
+        app:layout_constraintTop_toBottomOf="@+id/button5"
+        tools:visibility="visible">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ems="6"
+            android:imeOptions="actionGo"
+            android:inputType="number"
+            android:maxLength="4" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <TextView
+        android:id="@+id/currencyView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/amountView"
+        app:layout_constraintTop_toTopOf="@+id/amountView"
+        tools:text="TESTKUDOS"
+        tools:visibility="visible" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/confirmWithdrawalButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:backgroundTint="@color/green"
+        android:drawableLeft="@drawable/ic_withdraw"
+        android:drawableTint="?attr/colorOnPrimarySurface"
+        android:text="@string/withdraw_button_confirm"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/guideline"
+        app:layout_constraintTop_toBottomOf="@+id/amountView"
+        app:layout_constraintVertical_bias="1.0"
+        tools:ignore="RtlHardcoded"
+        tools:visibility="visible" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/cashier/src/main/res/layout-w550dp/fragment_transaction.xml b/cashier/src/main/res/layout-w550dp/fragment_transaction.xml
new file mode 100644
index 0000000..610ed28
--- /dev/null
+++ b/cashier/src/main/res/layout-w550dp/fragment_transaction.xml
@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".withdraw.TransactionFragment">
+
+    <TextView
+        android:id="@+id/introView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:gravity="center_horizontal"
+        android:text="@string/transaction_intro"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/amountView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:gravity="center_horizontal"
+        android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:text="50 KUDOS" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintGuide_percent="0.5" />
+
+    <ImageView
+        android:id="@+id/qrCodeView"
+        android:layout_width="256dp"
+        android:layout_height="256dp"
+        android:layout_margin="32dp"
+        android:keepScreenOn="true"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/guideline"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="ContentDescription"
+        tools:src="@drawable/ic_arrow"
+        tools:visibility="visible" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyleLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="@+id/qrCodeView"
+        app:layout_constraintEnd_toEndOf="@+id/qrCodeView"
+        app:layout_constraintStart_toStartOf="@+id/qrCodeView"
+        app:layout_constraintTop_toTopOf="@+id/qrCodeView" />
+
+    <Button
+        android:id="@+id/cancelButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:backgroundTint="@color/red"
+        android:text="@string/transaction_abort"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/confirmButton"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintHorizontal_chainStyle="spread_inside"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/qrCodeView"
+        app:layout_constraintVertical_bias="1.0" />
+
+    <Button
+        android:id="@+id/confirmButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:backgroundTint="@color/green"
+        android:enabled="false"
+        android:text="@string/transaction_confirm"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toEndOf="@+id/cancelButton"
+        tools:enabled="true" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/cashier/src/main/res/layout/activity_main.xml b/cashier/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..e41b842
--- /dev/null
+++ b/cashier/src/main/res/layout/activity_main.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            style="@style/AppTheme.Toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/nav_host_fragment"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:defaultNavHost="true"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:navGraph="@navigation/nav_graph" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/cashier/src/main/res/layout/fragment_balance.xml b/cashier/src/main/res/layout/fragment_balance.xml
new file mode 100644
index 0000000..5dafc59
--- /dev/null
+++ b/cashier/src/main/res/layout/fragment_balance.xml
@@ -0,0 +1,225 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".BalanceFragment">
+
+    <TextView
+        android:id="@+id/lastTransactionView"
+        style="@style/Widget.MaterialComponents.Snackbar.FullWidth"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimaryDark"
+        android:drawableStart="@drawable/ic_check_circle"
+        android:drawablePadding="8dp"
+        android:drawableTint="?attr/colorOnPrimarySurface"
+        android:gravity="center_vertical"
+        android:padding="8dp"
+        android:textColor="?attr/colorOnPrimarySurface"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="@string/transaction_last_success"
+        tools:visibility="visible" />
+
+    <View
+        android:id="@+id/balanceBackground"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="@color/background"
+        app:layout_constraintBottom_toBottomOf="@+id/balanceView"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/lastTransactionView" />
+
+    <TextView
+        android:id="@+id/balanceLabel"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:text="@string/balance_current_label"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/lastTransactionView" />
+
+    <TextView
+        android:id="@+id/balanceView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:paddingStart="@dimen/default_margin"
+        android:paddingTop="8dp"
+        android:gravity="center"
+        android:paddingEnd="@dimen/default_margin"
+        android:paddingBottom="@dimen/default_margin"
+        android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/balanceLabel"
+        tools:text="100 KUDOS" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="@+id/balanceView"
+        app:layout_constraintEnd_toEndOf="@+id/balanceView"
+        app:layout_constraintStart_toStartOf="@+id/balanceView"
+        app:layout_constraintTop_toTopOf="@+id/balanceView" />
+
+    <TextView
+        android:id="@+id/introView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/default_margin"
+        android:layout_marginTop="32dp"
+        android:layout_marginEnd="@dimen/default_margin"
+        android:text="@string/withdraw_into"
+        android:textAlignment="center"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toTopOf="@+id/button5"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/balanceBackground"
+        app:layout_constraintVertical_bias="0.25"
+        app:layout_constraintVertical_chainStyle="packed"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button5"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="5"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toTopOf="@+id/amountView"
+        app:layout_constraintEnd_toStartOf="@+id/button10"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button10"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="10"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toStartOf="@+id/button20"
+        app:layout_constraintStart_toEndOf="@+id/button5"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button20"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="20"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toStartOf="@+id/button50"
+        app:layout_constraintStart_toEndOf="@+id/button10"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <Button
+        android:id="@+id/button50"
+        style="@style/AmountButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="50"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/button20"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:ignore="HardcodedText"
+        tools:visibility="visible" />
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/amountView"
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/default_margin"
+        android:layout_marginTop="@dimen/default_margin"
+        android:hint="@string/withdraw_input_amount"
+        android:visibility="invisible"
+        app:endIconDrawable="@drawable/ic_clear"
+        app:endIconMode="clear_text"
+        app:endIconTint="?attr/colorControlNormal"
+        app:layout_constraintBottom_toTopOf="@+id/confirmWithdrawalButton"
+        app:layout_constraintEnd_toStartOf="@+id/currencyView"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/button5"
+        tools:visibility="visible">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ems="6"
+            android:imeOptions="actionGo"
+            android:inputType="number"
+            android:maxLength="4" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <TextView
+        android:id="@+id/currencyView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toEndOf="@+id/amountView"
+        app:layout_constraintTop_toTopOf="@+id/amountView"
+        tools:text="TESTKUDOS"
+        tools:visibility="visible" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/confirmWithdrawalButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:backgroundTint="@color/green"
+        android:drawableLeft="@drawable/ic_withdraw"
+        android:drawableTint="?attr/colorOnPrimarySurface"
+        android:text="@string/withdraw_button_confirm"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/amountView"
+        tools:ignore="RtlHardcoded"
+        tools:visibility="visible" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/cashier/src/main/res/layout/fragment_config.xml b/cashier/src/main/res/layout/fragment_config.xml
new file mode 100644
index 0000000..47ec6f9
--- /dev/null
+++ b/cashier/src/main/res/layout/fragment_config.xml
@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/urlView"
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:hint="@string/config_bank_url"
+        app:endIconMode="clear_text"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="textUri" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/usernameView"
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:hint="@string/config_username"
+        app:boxBackgroundMode="outline"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/urlView">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="text" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/passwordView"
+        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:hint="@string/config_password"
+        app:boxBackgroundMode="outline"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/usernameView"
+        app:passwordToggleEnabled="true">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="textWebPassword" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <Button
+        android:id="@+id/saveButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:text="@string/config_button_save"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/passwordView" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="@+id/saveButton"
+        app:layout_constraintEnd_toEndOf="@+id/saveButton"
+        app:layout_constraintStart_toStartOf="@+id/saveButton"
+        app:layout_constraintTop_toTopOf="@+id/saveButton"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/demoView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/default_margin"
+        android:text="@string/config_demo_hint"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/saveButton" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/cashier/src/main/res/layout/fragment_error.xml b/cashier/src/main/res/layout/fragment_error.xml
new file mode 100644
index 0000000..ac34c85
--- /dev/null
+++ b/cashier/src/main/res/layout/fragment_error.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/frameLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".withdraw.ErrorFragment">
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_margin="32dp"
+        android:src="@drawable/ic_error"
+        app:layout_constraintBottom_toTopOf="@+id/textView"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="ContentDescription" />
+
+    <androidx.appcompat.widget.AppCompatTextView
+        android:id="@+id/textView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_margin="32dp"
+        android:text="@string/transaction_error"
+        android:textAlignment="center"
+        android:textColor="@color/red"
+        app:autoSizeMaxTextSize="42sp"
+        app:autoSizeTextType="uniform"
+        app:layout_constraintBottom_toTopOf="@+id/backButton"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+    <Button
+        android:id="@+id/backButton"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:text="@string/transaction_button_back"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/cashier/src/main/res/layout/fragment_transaction.xml b/cashier/src/main/res/layout/fragment_transaction.xml
new file mode 100644
index 0000000..3affbf2
--- /dev/null
+++ b/cashier/src/main/res/layout/fragment_transaction.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".withdraw.TransactionFragment">
+
+    <TextView
+        android:id="@+id/introView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:gravity="center_horizontal"
+        android:text="@string/transaction_intro"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/amountView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="32dp"
+        android:gravity="center_horizontal"
+        android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/introView"
+        tools:text="50 KUDOS" />
+
+    <ImageView
+        android:id="@+id/qrCodeView"
+        android:layout_width="256dp"
+        android:layout_height="256dp"
+        android:layout_margin="32dp"
+        android:keepScreenOn="true"
+        android:visibility="invisible"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/amountView"
+        tools:ignore="ContentDescription"
+        tools:src="@drawable/ic_arrow"
+        tools:visibility="visible" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyleLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="@+id/qrCodeView"
+        app:layout_constraintEnd_toEndOf="@+id/qrCodeView"
+        app:layout_constraintStart_toStartOf="@+id/qrCodeView"
+        app:layout_constraintTop_toTopOf="@+id/qrCodeView" />
+
+    <Button
+        android:id="@+id/cancelButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:backgroundTint="@color/red"
+        android:text="@string/transaction_abort"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/confirmButton"
+        app:layout_constraintHorizontal_chainStyle="spread_inside"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/qrCodeView"
+        app:layout_constraintVertical_bias="1.0" />
+
+    <Button
+        android:id="@+id/confirmButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:backgroundTint="@color/green"
+        android:enabled="false"
+        android:text="@string/transaction_confirm"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/cancelButton"
+        tools:enabled="true" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/cashier/src/main/res/menu/balance.xml b/cashier/src/main/res/menu/balance.xml
new file mode 100644
index 0000000..bc64af3
--- /dev/null
+++ b/cashier/src/main/res/menu/balance.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/action_reconfigure"
+        android:title="@string/action_reconfigure"
+        app:showAsAction="never" />
+    <item
+        android:id="@+id/action_lock"
+        android:title="@string/action_lock"
+        app:showAsAction="never" />
+
+</menu>
diff --git a/cashier/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/cashier/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 0000000..7353dbd
--- /dev/null
+++ b/cashier/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>
\ No newline at end of file
diff --git a/cashier/src/main/res/mipmap-hdpi/ic_launcher.png b/cashier/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 0000000..c52928c
--- /dev/null
+++ b/cashier/src/main/res/mipmap-hdpi/ic_launcher.png
diff --git a/cashier/src/main/res/mipmap-mdpi/ic_launcher.png b/cashier/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 0000000..b97178b
--- /dev/null
+++ b/cashier/src/main/res/mipmap-mdpi/ic_launcher.png
diff --git a/cashier/src/main/res/mipmap-xhdpi/ic_launcher.png b/cashier/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 0000000..8f92c07
--- /dev/null
+++ b/cashier/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/cashier/src/main/res/mipmap-xxhdpi/ic_launcher.png b/cashier/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 0000000..214cbea
--- /dev/null
+++ b/cashier/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/cashier/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/cashier/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 0000000..b959cd3
--- /dev/null
+++ b/cashier/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/cashier/src/main/res/navigation/nav_graph.xml b/cashier/src/main/res/navigation/nav_graph.xml
new file mode 100644
index 0000000..49f8881
--- /dev/null
+++ b/cashier/src/main/res/navigation/nav_graph.xml
@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/nav_graph"
+    app:startDestination="@id/balanceFragment"
+    tools:ignore="UnusedNavigation">
+
+    <fragment
+        android:id="@+id/configFragment"
+        android:name="net.taler.cashier.ConfigFragment"
+        android:label="ConfigFragment"
+        tools:layout="@layout/fragment_config">
+        <action
+            android:id="@+id/action_configFragment_to_balanceFragment"
+            app:destination="@id/balanceFragment"
+            app:launchSingleTop="true"
+            app:popUpTo="@id/balanceFragment" />
+    </fragment>
+
+    <fragment
+        android:id="@+id/balanceFragment"
+        android:name="net.taler.cashier.BalanceFragment"
+        android:label="fragment_balance"
+        tools:layout="@layout/fragment_balance">
+        <action
+            android:id="@+id/action_balanceFragment_to_transactionFragment"
+            app:destination="@id/transactionFragment" />
+    </fragment>
+
+    <fragment
+        android:id="@+id/transactionFragment"
+        android:name="net.taler.cashier.withdraw.TransactionFragment"
+        android:label="fragment_transaction"
+        tools:layout="@layout/fragment_transaction">
+        <action
+            android:id="@+id/action_transactionFragment_to_errorFragment"
+            app:destination="@id/errorFragment"
+            app:launchSingleTop="true"
+            app:popUpTo="@+id/balanceFragment" />
+        <action
+            android:id="@+id/action_transactionFragment_to_balanceFragment"
+            app:destination="@id/balanceFragment"
+            app:launchSingleTop="true"
+            app:popUpTo="@+id/balanceFragment" />
+    </fragment>
+
+    <fragment
+        android:id="@+id/errorFragment"
+        android:name="net.taler.cashier.withdraw.ErrorFragment"
+        tools:layout="@layout/fragment_error" />
+
+    <action
+        android:id="@+id/action_global_configFragment"
+        app:destination="@id/configFragment"
+        app:launchSingleTop="true" />
+
+</navigation>
diff --git a/cashier/src/main/res/values-night/colors.xml b/cashier/src/main/res/values-night/colors.xml
new file mode 100644
index 0000000..55dde58
--- /dev/null
+++ b/cashier/src/main/res/values-night/colors.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<resources>
+    <color name="background">#222222</color>
+</resources>
diff --git a/cashier/src/main/res/values/colors.xml b/cashier/src/main/res/values/colors.xml
new file mode 100644
index 0000000..61338da
--- /dev/null
+++ b/cashier/src/main/res/values/colors.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#1565C0</color>
+    <color name="colorPrimaryDark">#6A1B9A</color>
+    <color name="colorAccent">#D81B60</color>
+
+    <color name="background">#F1F1F1</color>
+    <color name="green">#388E3C</color>
+    <color name="red">#D32F2F</color>
+</resources>
diff --git a/cashier/src/main/res/values/dimens.xml b/cashier/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..9d9d85a
--- /dev/null
+++ b/cashier/src/main/res/values/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="default_margin">16dp</dimen>
+</resources>
diff --git a/cashier/src/main/res/values/ic_launcher_background.xml b/cashier/src/main/res/values/ic_launcher_background.xml
new file mode 100644
index 0000000..3862264
--- /dev/null
+++ b/cashier/src/main/res/values/ic_launcher_background.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#1565C0</color>
+</resources>
\ No newline at end of file
diff --git a/cashier/src/main/res/values/strings.xml b/cashier/src/main/res/values/strings.xml
new file mode 100644
index 0000000..5df5bfa
--- /dev/null
+++ b/cashier/src/main/res/values/strings.xml
@@ -0,0 +1,39 @@
+<resources>
+    <string name="app_name">Taler Cashier</string>
+
+    <string name="config_bank_url">Bank API address</string>
+    <string name="config_username">Username</string>
+    <string name="config_password">Password</string>
+    <string name="config_button_save">Save</string>
+    <string name="config_bank_url_error">The address in invalid.</string>
+    <string name="config_username_error">Please enter your username</string>
+    <string name="config_error">Error retrieving configuration</string>
+    <string name="config_error_auth">Invalid username or password</string>
+    <string name="config_demo_hint">For testing, you can <![CDATA[<a href="%s">create a test account at the demo bank</a>]]>.</string>
+
+    <string name="balance_current_label">Current balance</string>
+    <string name="balance_error">ERROR</string>
+    <string name="balance_offline">Offline. Please connect to the Internet</string>
+    <string name="action_reconfigure">Reconfigure</string>
+    <string name="action_lock">Lock</string>
+
+    <string name="withdraw_input_amount">Amount</string>
+    <string name="withdraw_into">How much e-cash should be withdrawn?</string>
+    <string name="withdraw_error_zero">Enter positive amount</string>
+    <string name="withdraw_error_insufficient_balance">Insufficient balance</string>
+    <string name="withdraw_error_fetch">Error communicating with bank</string>
+    <string name="withdraw_button_confirm">Withdraw</string>
+
+    <string name="transaction_intro">Scan code\nwith the Taler wallet app\nto get</string>
+    <string name="transaction_intro_nfc">Scan code or use NFC\nwith the Taler wallet app\nto get</string>
+    <string name="transaction_intro_scanned">Please confirm the transaction!</string>
+    <string name="transaction_confirm">Confirm</string>
+    <string name="transaction_abort">Abort</string>
+    <string name="transaction_error">Transaction error</string>
+    <string name="transaction_aborted">Transaction aborted</string>
+    <string name="transaction_button_back">Go back</string>
+    <string name="transaction_last_success">Last Transaction: %s withdrawn</string>
+    <string name="transaction_last_aborted">Last Transaction: Aborted</string>
+    <string name="transaction_last_error">Last Transaction: Error</string>
+
+</resources>
diff --git a/cashier/src/main/res/values/styles.xml b/cashier/src/main/res/values/styles.xml
new file mode 100644
index 0000000..4339684
--- /dev/null
+++ b/cashier/src/main/res/values/styles.xml
@@ -0,0 +1,28 @@
+<resources>
+
+    <style name="AppTheme" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorOnPrimary">@color/design_default_color_background</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorSecondary">@color/colorAccent</item>
+        <item name="colorOnSecondary">@color/design_default_color_background</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.MaterialComponents.ActionBar" />
+
+    <style name="AppTheme.Toolbar" parent="Widget.MaterialComponents.Toolbar.Primary" />
+
+    <style name="AmountButton" parent="Widget.MaterialComponents.Button">
+        <item name="android:minWidth">48dp</item>
+        <item name="android:layout_marginStart">@dimen/default_margin</item>
+        <item name="android:layout_marginEnd">@dimen/default_margin</item>
+        <item name="android:layout_marginTop">16dp</item>
+    </style>
+
+</resources>
diff --git a/cashier/src/main/res/xml/backup_descriptor.xml b/cashier/src/main/res/xml/backup_descriptor.xml
new file mode 100644
index 0000000..a298494
--- /dev/null
+++ b/cashier/src/main/res/xml/backup_descriptor.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of GNU Taler
+  ~ (C) 2020 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/>
+  -->
+
+<full-backup-content>
+
+</full-backup-content>