Monerujo for Ledger Nano S (#377)

* Change method of enumerating translated locales

.gitignore

@@ -1,8 +1,7 @@
 .gradle
 /build
 *.iml
-/.idea/libraries
-/.idea/workspace.xml
+/.idea
 /local.properties
 /captures
 .externalNativeBuild

README.md

@@ -1,12 +1,23 @@
 # Monerujo
-Another Android Monero Wallet
+Another Android Monero Wallet for Monero
+	**(not
+    Monero Classic,
+    Monero-Classic,
+    Monero Zero,
+    Monero Original,
+    Monero C,
+    Monero V)**
 
 ### QUICKSTART
 - Download the APK for the most current release [here](https://github.com/m2049r/xmrwallet/releases) and install it
+- Alternatively add our F-Droid repo https://f-droid.monerujo.io/fdroid/repo with fingerpint ```A8 2C 68 E1 4A F0 AA 6A 2E C2 0E 6B 27 2E FF 25 E5 A0 38 F3 F6 58 84 31 6E 0F 5E 0D 91 E7 B7 13``` to your F-Droid client
 - Run the App and select "Generate Wallet" to create a new wallet or recover a wallet
 - Advanced users can copy over synced wallet files (all files) onto sdcard in directory Monerujo (created first time App is started)
 - See the [FAQ](doc/FAQ.md)
 
+## Translations
+Help us translate Monerujo! You can find instructions [On Taiga](https://taiga.getmonero.org/project/erciccione-monero-localization/wiki/monerujo), and if you need help/support, open an issue or contact the Localization Workgroup. You can find us on the freenode channel `#monero-translations`, also relayed on [MatterMost](https://mattermost.getmonero.org/monero/channels/monero-translations), and matrix/riot.
+
 ### Disclaimer
 You may lose all your Moneroj if you use this App. Be cautious when spending on the mainnet.
 
@@ -23,6 +34,8 @@ You may lose all your Moneroj if you use this App. Be cautious when spending on
 - see taiga.getmonero.org & issues on github
 
 ### Issues / Pitfalls
+- Users of Zenfone MAX & Zenfone 2 Laser (possibly others) **MUST** use the armeabi-v7a APK as the arm64-v8a build uses hardware AES
+functionality these models don't have.
 - You should backup your wallet files in the "monerujo" folder periodically.
 - Also note, that on some devices the backups will only be visible on a PC over USB after a reboot of the device (it's an Android bug/feature)
 - Created wallets on a private testnet are unusable because the restore height is set to that
@@ -33,8 +46,8 @@ The official monero client shows the same behaviour.
 No need to build. Binaries are included:
 
 - openssl-1.0.2l
-- monero-v0.11.1.0
-- boost_1_64_0
+- monero-v0.12
+- boost_1_58_0
 
 If you want to build them yourself (recommended) check out [the instructions](doc/BUILDING-external-libs.md)
 

app/build.gradle

@@ -1,15 +1,14 @@
 apply plugin: 'com.android.application'
-apply plugin: 'witness'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion '26.0.2'
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 25
-        versionCode 85
-        versionName "1.4.5 'Monero Spedner'"
+        versionCode 111
+        versionName "1.6.1 'Nano S'"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {
@@ -17,9 +16,6 @@ android {
                 arguments '-DANDROID_STL=c++_shared'
             }
         }
-        ndk {
-            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
-        }
     }
 
     buildTypes {
@@ -49,62 +45,46 @@ android {
     // Map for the version code that gives each ABI a value.
     def abiCodes = ['armeabi-v7a': 1, 'arm64-v8a': 2, 'x86': 3, 'x86_64': 4]
 
+    // Enumerate translated locales
+    def availableLocales = ["en"]
+    new File("app/src/main/res/").eachFileMatch(~/^values-.*/) { file ->
+        def languageTag = file.name.substring(7).replace("-r", "-")
+        availableLocales.add(languageTag)
+    }
+
     // APKs for the same app that all have the same version information.
     android.applicationVariants.all { variant ->
+        // Update string resource: available_locales
+        variant.resValue("string", "available_locales", availableLocales.join(","))
         // Assigns a different version code for each output APK.
-        variant.outputs.each {
+        variant.outputs.all {
             output ->
                 def abiName = output.getFilter(com.android.build.OutputFile.ABI)
                 output.versionCodeOverride = abiCodes.get(abiName, 0) + 10 * variant.versionCode
+
+                if (abiName == null) abiName = "universal"
+                def v = "${variant.versionName}".replaceFirst(" .*\$", "").replace(".", "x")
+                outputFileName = "$rootProject.ext.apkName-" + v + "_" + abiName + ".apk"
         }
     }
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:25.4.0'
-    compile 'com.android.support:design:25.4.0'
-    compile 'com.android.support:support-v4:25.4.0'
-    compile 'com.android.support:recyclerview-v7:25.4.0'
-    compile 'com.android.support:cardview-v7:25.4.0'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
-    compile 'me.dm7.barcodescanner:zxing:1.9.8'
+    implementation 'com.android.support:appcompat-v7:25.4.0'
+    implementation 'com.android.support:design:25.4.0'
+    implementation 'com.android.support:support-v4:25.4.0'
+    implementation 'com.android.support:recyclerview-v7:25.4.0'
+    implementation 'com.android.support:cardview-v7:25.4.0'
+    implementation 'me.dm7.barcodescanner:zxing:1.9.8'
 
-    compile "com.squareup.okhttp3:okhttp:$rootProject.ext.okHttpVersion"
-    compile "com.jakewharton.timber:timber:$rootProject.ext.timberVersion"
+    implementation "com.squareup.okhttp3:okhttp:$rootProject.ext.okHttpVersion"
+    implementation "com.jakewharton.timber:timber:$rootProject.ext.timberVersion"
 
-    compile 'com.nulab-inc:zxcvbn:1.2.3'
+    implementation 'com.nulab-inc:zxcvbn:1.2.3'
 
-    testCompile "junit:junit:$rootProject.ext.junitVersion"
-    testCompile "org.mockito:mockito-all:$rootProject.ext.mockitoVersion"
-    testCompile "com.squareup.okhttp3:mockwebserver:$rootProject.ext.okHttpVersion"
-    testCompile 'org.json:json:20140107'
-    testCompile 'net.jodah:concurrentunit:0.4.2'
-}
-
-dependencyVerification {
-    verify = [
-            'com.android.support:design:3f409bf2019967ffc344cfaf11e52131fac982468a1707aaeb25bf3c52838966',
-            'com.android.support:appcompat-v7:70551e62660db15b790c5275f56b9de4dd9407d1494d07c8f3dd5698f3638677',
-            'com.android.support:transition:848270144fb180efd2bf928a00ed176dbbc5290badfd638390ffba90088df8b3',
-            'me.dm7.barcodescanner:zxing:d43973c9527c23fa8e6d338c6a2c458e373ce1ac6bcaa3bc41d11ae49116000d',
-            'me.dm7.barcodescanner:core:a5c8a704089b58029db166172ed8e55d756877d010a85a0b1c94fdc96ffb8f9a',
-            'com.android.support:support-v4:ee44c481a1f4d6978568e223e8125379b52b2ececdd53450e09ebae144bd377d',
-            'com.android.support:recyclerview-v7:a2fe121f9d01ed8980e97095b4a3fe9700a0aa0a7d4b0f8c594f765ad8455a0d',
-            'com.android.support:cardview-v7:f3fbbe1fcfdbec7333c6a2c516c5fd511a909d1975271818e268d6fe297d8c70',
-            'com.android.support.constraint:constraint-layout:b0c688cc2b7172608f8153a689d746da40f71e52d7e2fe2bfd9df2f92db77085',
-            'com.android.support:animated-vector-drawable:628ab1d56a6ee4cbedf32617af8b2a1fe02964ed0628e8f898cc09ddba6e1835',
-            'com.android.support:support-vector-drawable:077009d13882ee96f061e4bc2dbe7cce7ae1762d8297592a787ff741afbfb1f2',
-            'com.android.support:support-fragment:316d35d4d2d2902057efad104a73e4bdb50bee260a7075678185b8cd71170945',
-            'com.android.support:support-core-ui:e72ae29b823889686cff6fcb948d6745c2baf6d4c2af4fdffa1ec1e42e3833a3',
-            'com.android.support:support-media-compat:566a161d9cb0083ef62a53e46b71ce5b3d455b8635b1a0a4ae28d96d4b583de8',
-            'com.android.support:support-core-utils:34b8437dfa95ff28d29cf57ffa3b1354a9fa9bfe4059f0fd5ce2f5e4326a1748',
-            'com.android.support:support-compat:54019c63614ce08b02d7b9605490cd2b29ba5b2505f394a9517450b5f72b30ca',
-            'com.android.support:support-annotations:a774272036941b4e912eb426d70c848bde7f06a3bf5fb491f75a427dc6595270',
-            'com.android.support.constraint:constraint-layout-solver:8c62525a9bc5cff5633a96cb9b32fffeccaf41b8841aa87fc22607070dea9b8d',
-            'com.google.zxing:core:bba7724e02a997cec38213af77133ee8e24b0d5cf5fa7ecbc16a4fa93f11ee0d',
-            'com.squareup.okio:okio:734269c3ebc5090e3b23566db558f421f0b4027277c79ad5d176b8ec168bb850',
-            'com.squareup.okhttp3:okhttp:7265adbd6f028aade307f58569d814835cd02bc9beffb70c25f72c9de50d61c4',
-            'com.jakewharton.timber:timber:35c22867f2673132e97e17857d36bb2fc25f5790f0425406833ed0254d62fc66',
-            'com.nulab-inc:zxcvbn:18d7862a6abd2705defec478d77dedadf8f3bb7cf811df22995494f05485785f',
-    ]
+    testImplementation "junit:junit:$rootProject.ext.junitVersion"
+    testImplementation "org.mockito:mockito-all:$rootProject.ext.mockitoVersion"
+    testImplementation "com.squareup.okhttp3:mockwebserver:$rootProject.ext.okHttpVersion"
+    testImplementation 'org.json:json:20140107'
+    testImplementation 'net.jodah:concurrentunit:0.4.2'
 }

app/src/main/AndroidManifest.xml

@@ -7,13 +7,14 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.USE_FINGERPRINT" />
 
     <application
+        android:name=".XmrWalletApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
-        android:name=".XmrWalletApplication"
         android:theme="@style/MyMaterialTheme">
 
         <activity
@@ -27,13 +28,39 @@
             android:name=".LoginActivity"
             android:configChanges="orientation|keyboardHidden"
             android:label="@string/app_name"
+            android:launchMode="singleTop"
             android:screenOrientation="portrait">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <intent-filter>
+                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
+                android:resource="@xml/usb_device_filter" />
+
         </activity>
 
+        <!--activity
+            android:name=".util.UsbEventReceiverActivity"
+            android:excludeFromRecents="true"
+            android:exported="false"
+            android:label="@string/app_name"
+            android:noHistory="true"
+            android:process=":UsbEventReceiverActivityProcess"
+            android:taskAffinity="com.m2049r.xmrwallet.taskAffinityUsbEventReceiver"
+            android:theme="@style/Theme.Transparent">
+            <intent-filter>
+                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
+            </intent-filter>
+            <meta-data
+                android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
+                android:resource="@xml/usb_device_filter" />
+        </activity-->
+
         <service
             android:name=".service.WalletService"
             android:description="@string/service_description"

app/src/main/cpp/monerujo.h

@@ -18,6 +18,7 @@
 #define XMRWALLET_WALLET_LIB_H
 
 #include <jni.h>
+
 /*
 #include <android/log.h>
 
@@ -27,13 +28,13 @@
 #define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
 */
 
-jfieldID getHandleField(JNIEnv *env, jobject obj, const char* fieldName = "handle") {
+jfieldID getHandleField(JNIEnv *env, jobject obj, const char *fieldName = "handle") {
     jclass c = env->GetObjectClass(obj);
     return env->GetFieldID(c, fieldName, "J"); // of type long
 }
 
-template <typename T>
-T *getHandle(JNIEnv *env, jobject obj, const char* fieldName = "handle") {
+template<typename T>
+T *getHandle(JNIEnv *env, jobject obj, const char *fieldName = "handle") {
     jlong handle = env->GetLongField(obj, getHandleField(env, obj, fieldName));
     return reinterpret_cast<T *>(handle);
 }
@@ -42,10 +43,35 @@ void setHandleFromLong(JNIEnv *env, jobject obj, jlong handle) {
     env->SetLongField(obj, getHandleField(env, obj), handle);
 }
 
-template <typename T>
+template<typename T>
 void setHandle(JNIEnv *env, jobject obj, T *t) {
     jlong handle = reinterpret_cast<jlong>(t);
     setHandleFromLong(env, obj, handle);
 }
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+// from monero-core crypto/hash-ops.h - avoid #including monero code here
+enum {
+    HASH_SIZE = 32,
+    HASH_DATA_AREA = 136
+};
+
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed);
+
+inline void slow_hash(const void *data, const size_t length, char *hash) {
+    cn_slow_hash(data, length, hash, 0 /* variant */, 0/*prehashed*/);
+}
+
+inline void slow_hash_broken(const void *data, char *hash, int variant) {
+    cn_slow_hash(data, 200 /*sizeof(union hash_state)*/, hash, variant, 1 /*prehashed*/);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif //XMRWALLET_WALLET_LIB_H

app/src/main/cpp/monerujo_ledger.h

@@ -0,0 +1,46 @@
+/**
+ * Copyright (c) 2018 m2049r
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef XMRWALLET_LEDGER_H
+#define XMRWALLET_LEDGER_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#define SCARD_S_SUCCESS ((LONG)0x00000000) /**< No error was encountered. */
+#define SCARD_E_INSUFFICIENT_BUFFER    ((LONG)0x80100008) /**< The data buffer to receive returned data is too small for the returned data. */
+#define SCARD_E_NO_READERS_AVAILABLE ((LONG)0x8010002E) /**< Cannot find a smart card reader. */
+
+typedef long LONG;
+typedef unsigned long DWORD;
+typedef DWORD *LPDWORD;
+typedef unsigned char BYTE;
+typedef BYTE *LPBYTE;
+typedef const BYTE *LPCBYTE;
+
+typedef char CHAR;
+typedef CHAR *LPSTR;
+
+int LedgerFind(char *buffer, size_t len);
+LONG LedgerExchange(LPCBYTE pbSendBuffer, DWORD cbSendLength, LPBYTE pbRecvBuffer, LPDWORD pcbRecvLength);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //XMRWALLET_LEDGER_H

app/src/main/java/com/btchip/BTChipException.java

@@ -0,0 +1,53 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip;
+
+public class BTChipException extends Exception {
+
+    private static final long serialVersionUID = 5512803003827126405L;
+
+    public BTChipException(String reason) {
+        super(reason);
+    }
+
+    public BTChipException(String reason, Throwable cause) {
+        super(reason, cause);
+    }
+
+    public BTChipException(String reason, int sw) {
+        super(reason);
+        this.sw = sw;
+    }
+
+    public int getSW() {
+        return sw;
+    }
+
+    public String toString() {
+        if (sw == 0) {
+            return "BTChip Exception : " + getMessage();
+        } else {
+            return "BTChip Exception : " + getMessage() + " " + Integer.toHexString(sw);
+        }
+    }
+
+    private int sw;
+
+}

app/src/main/java/com/btchip/comm/BTChipTransport.java

@@ -0,0 +1,31 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm;
+
+import com.btchip.BTChipException;
+
+public interface BTChipTransport {
+    public byte[] exchange(byte[] command);
+
+    public void close();
+
+    public void setDebug(boolean debugFlag);
+}

app/src/main/java/com/btchip/comm/LedgerHelper.java

@@ -0,0 +1,126 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm;
+
+import java.io.ByteArrayOutputStream;
+
+public class LedgerHelper {
+
+    private static final int TAG_APDU = 0x05;
+
+    public static byte[] wrapCommandAPDU(int channel, byte[] command, int packetSize) {
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        if (packetSize < 3) {
+            throw new IllegalArgumentException("Can't handle Ledger framing with less than 3 bytes for the report");
+        }
+        int sequenceIdx = 0;
+        int offset = 0;
+        output.write(channel >> 8);
+        output.write(channel);
+        output.write(TAG_APDU);
+        output.write(sequenceIdx >> 8);
+        output.write(sequenceIdx);
+        sequenceIdx++;
+        output.write(command.length >> 8);
+        output.write(command.length);
+        int blockSize = (command.length > packetSize - 7 ? packetSize - 7 : command.length);
+        output.write(command, offset, blockSize);
+        offset += blockSize;
+        while (offset != command.length) {
+            output.write(channel >> 8);
+            output.write(channel);
+            output.write(TAG_APDU);
+            output.write(sequenceIdx >> 8);
+            output.write(sequenceIdx);
+            sequenceIdx++;
+            blockSize = (command.length - offset > packetSize - 5 ? packetSize - 5 : command.length - offset);
+            output.write(command, offset, blockSize);
+            offset += blockSize;
+        }
+        if ((output.size() % packetSize) != 0) {
+            byte[] padding = new byte[packetSize - (output.size() % packetSize)];
+            output.write(padding, 0, padding.length);
+        }
+        return output.toByteArray();
+    }
+
+    public static byte[] unwrapResponseAPDU(int channel, byte[] data, int packetSize) {
+        ByteArrayOutputStream response = new ByteArrayOutputStream();
+        int offset = 0;
+        int responseLength;
+        int sequenceIdx = 0;
+        if ((data == null) || (data.length < 7 + 5)) {
+            return null;
+        }
+        if (data[offset++] != (channel >> 8)) {
+            throw new IllegalArgumentException("Invalid channel");
+        }
+        if (data[offset++] != (channel & 0xff)) {
+            throw new IllegalArgumentException("Invalid channel");
+        }
+        if (data[offset++] != TAG_APDU) {
+            throw new IllegalArgumentException("Invalid tag");
+        }
+        if (data[offset++] != 0x00) {
+            throw new IllegalArgumentException("Invalid sequence");
+        }
+        if (data[offset++] != 0x00) {
+            throw new IllegalArgumentException("Invalid sequence");
+        }
+        responseLength = ((data[offset++] & 0xff) << 8);
+        responseLength |= (data[offset++] & 0xff);
+        if (data.length < 7 + responseLength) {
+            return null;
+        }
+        int blockSize = (responseLength > packetSize - 7 ? packetSize - 7 : responseLength);
+        response.write(data, offset, blockSize);
+        offset += blockSize;
+        while (response.size() != responseLength) {
+            sequenceIdx++;
+            if (offset == data.length) {
+                return null;
+            }
+            if (data[offset++] != (channel >> 8)) {
+                throw new IllegalArgumentException("Invalid channel");
+            }
+            if (data[offset++] != (channel & 0xff)) {
+                throw new IllegalArgumentException("Invalid channel");
+            }
+            if (data[offset++] != TAG_APDU) {
+                throw new IllegalArgumentException("Invalid tag");
+            }
+            if (data[offset++] != (sequenceIdx >> 8)) {
+                throw new IllegalArgumentException("Invalid sequence");
+            }
+            if (data[offset++] != (sequenceIdx & 0xff)) {
+                throw new IllegalArgumentException("Invalid sequence");
+            }
+            blockSize = (responseLength - response.size() > packetSize - 5 ? packetSize - 5 : responseLength - response.size());
+            if (blockSize > data.length - offset) {
+                return null;
+            }
+            response.write(data, offset, blockSize);
+            offset += blockSize;
+        }
+        return response.toByteArray();
+    }
+
+}

app/src/main/java/com/btchip/comm/android/BTChipTransportAndroidHID.java

@@ -0,0 +1,145 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm.android;
+
+import android.hardware.usb.UsbConstants;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbDeviceConnection;
+import android.hardware.usb.UsbEndpoint;
+import android.hardware.usb.UsbInterface;
+import android.hardware.usb.UsbManager;
+import android.hardware.usb.UsbRequest;
+
+import com.btchip.BTChipException;
+import com.btchip.comm.BTChipTransport;
+import com.btchip.comm.LedgerHelper;
+import com.btchip.utils.Dump;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+
+import timber.log.Timber;
+
+public class BTChipTransportAndroidHID implements BTChipTransport {
+
+    public static UsbDevice getDevice(UsbManager manager) {
+        HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
+        for (UsbDevice device : deviceList.values()) {
+            Timber.d("%04X:%04X %s, %s", device.getVendorId(), device.getProductId(), device.getManufacturerName(), device.getProductName());
+            if ((device.getVendorId() == VID) && (device.getProductId() == PID_HID)) {
+                return device;
+            }
+        }
+        return null;
+    }
+
+    public static BTChipTransport open(UsbManager manager, UsbDevice device) throws IOException {
+        UsbDeviceConnection connection = manager.openDevice(device);
+        if (connection == null) throw new IOException("Device not connected");
+        // Must only be called once permission is granted (see http://developer.android.com/reference/android/hardware/usb/UsbManager.html)
+        // Important if enumerating, rather than being awaken by the intent notification
+        UsbInterface dongleInterface = device.getInterface(0);
+        UsbEndpoint in = null;
+        UsbEndpoint out = null;
+        for (int i = 0; i < dongleInterface.getEndpointCount(); i++) {
+            UsbEndpoint tmpEndpoint = dongleInterface.getEndpoint(i);
+            if (tmpEndpoint.getDirection() == UsbConstants.USB_DIR_IN) {
+                in = tmpEndpoint;
+            } else {
+                out = tmpEndpoint;
+            }
+        }
+        connection.claimInterface(dongleInterface, true);
+        return new BTChipTransportAndroidHID(connection, dongleInterface, in, out);
+    }
+
+    private static final int VID = 0x2C97;
+    private static final int PID_HID = 0x0001;
+
+    private UsbDeviceConnection connection;
+    private UsbInterface dongleInterface;
+    private UsbEndpoint in;
+    private UsbEndpoint out;
+    private byte transferBuffer[];
+    private boolean debug;
+
+    public BTChipTransportAndroidHID(UsbDeviceConnection connection, UsbInterface dongleInterface, UsbEndpoint in, UsbEndpoint out) {
+        this.connection = connection;
+        this.dongleInterface = dongleInterface;
+        this.in = in;
+        this.out = out;
+        transferBuffer = new byte[HID_BUFFER_SIZE];
+    }
+
+    @Override
+    public byte[] exchange(byte[] command) {
+        ByteArrayOutputStream response = new ByteArrayOutputStream();
+        byte[] responseData = null;
+        int offset = 0;
+        if (debug) {
+            Timber.d("=> %s", Dump.dump(command));
+        }
+        command = LedgerHelper.wrapCommandAPDU(LEDGER_DEFAULT_CHANNEL, command, HID_BUFFER_SIZE);
+        UsbRequest requestOut = new UsbRequest();
+        requestOut.initialize(connection, out);
+        while (offset != command.length) {
+            int blockSize = (command.length - offset > HID_BUFFER_SIZE ? HID_BUFFER_SIZE : command.length - offset);
+            System.arraycopy(command, offset, transferBuffer, 0, blockSize);
+            requestOut.queue(ByteBuffer.wrap(transferBuffer), HID_BUFFER_SIZE);
+            connection.requestWait();
+            offset += blockSize;
+        }
+        requestOut.close();
+        ByteBuffer responseBuffer = ByteBuffer.allocate(HID_BUFFER_SIZE);
+        UsbRequest requestIn = new UsbRequest();
+        requestIn.initialize(connection, in);
+        while ((responseData = LedgerHelper.unwrapResponseAPDU(LEDGER_DEFAULT_CHANNEL, response.toByteArray(), HID_BUFFER_SIZE)) == null) {
+            responseBuffer.clear();
+            requestIn.queue(responseBuffer, HID_BUFFER_SIZE);
+            connection.requestWait();
+            responseBuffer.rewind();
+            responseBuffer.get(transferBuffer, 0, HID_BUFFER_SIZE);
+            response.write(transferBuffer, 0, HID_BUFFER_SIZE);
+        }
+        requestIn.close();
+        if (debug) {
+            Timber.d("<= %s", Dump.dump(responseData));
+        }
+        return responseData;
+    }
+
+    @Override
+    public void close() {
+        connection.releaseInterface(dongleInterface);
+        connection.close();
+    }
+
+    @Override
+    public void setDebug(boolean debugFlag) {
+        this.debug = debugFlag;
+    }
+
+    private static final int HID_BUFFER_SIZE = 64;
+    private static final int LEDGER_DEFAULT_CHANNEL = 1;
+    private static final int SW1_DATA_AVAILABLE = 0x61;
+}

app/src/main/java/com/btchip/utils/Dump.java

@@ -0,0 +1,62 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.utils;
+
+import java.io.ByteArrayOutputStream;
+
+public class Dump {
+
+    public static String dump(byte[] buffer, int offset, int length) {
+        String result = "";
+        for (int i = 0; i < length; i++) {
+            String temp = Integer.toHexString((buffer[offset + i]) & 0xff);
+            if (temp.length() < 2) {
+                temp = "0" + temp;
+            }
+            result += temp;
+        }
+        return result;
+    }
+
+    public static String dump(byte[] buffer) {
+        return dump(buffer, 0, buffer.length);
+    }
+
+    public static byte[] hexToBin(String src) {
+        ByteArrayOutputStream result = new ByteArrayOutputStream();
+        int i = 0;
+        while (i < src.length()) {
+            char x = src.charAt(i);
+            if (!((x >= '0' && x <= '9') || (x >= 'A' && x <= 'F') || (x >= 'a' && x <= 'f'))) {
+                i++;
+                continue;
+            }
+            try {
+                result.write(Integer.valueOf("" + src.charAt(i) + src.charAt(i + 1), 16));
+                i += 2;
+            } catch (Exception e) {
+                return null;
+            }
+        }
+        return result.toByteArray();
+    }
+
+
+}

app/src/main/java/com/m2049r/xmrwallet/BaseActivity.java

@@ -0,0 +1,105 @@
+package com.m2049r.xmrwallet;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.PowerManager;
+
+import com.m2049r.xmrwallet.dialog.ProgressDialog;
+import com.m2049r.xmrwallet.ledger.Ledger;
+import com.m2049r.xmrwallet.ledger.LedgerProgressDialog;
+
+import timber.log.Timber;
+
+public class BaseActivity extends SecureActivity implements GenerateReviewFragment.ProgressListener {
+
+    ProgressDialog progressDialog = null;
+
+    private class SimpleProgressDialog extends ProgressDialog {
+
+        SimpleProgressDialog(Context context, int msgId) {
+            super(context);
+            setCancelable(false);
+            setMessage(context.getString(msgId));
+        }
+
+        @Override
+        public void onBackPressed() {
+            // prevent back button
+        }
+    }
+
+    @Override
+    public void showProgressDialog(int msgId) {
+        showProgressDialog(msgId, 0);
+    }
+
+    public void showProgressDialog(int msgId, long delay) {
+        dismissProgressDialog(); // just in case
+        progressDialog = new SimpleProgressDialog(BaseActivity.this, msgId);
+        if (delay > 0) {
+            Handler handler = new Handler();
+            handler.postDelayed(new Runnable() {
+                public void run() {
+                    if (progressDialog != null) progressDialog.show();
+                }
+            }, delay);
+        } else {
+            progressDialog.show();
+        }
+    }
+
+    @Override
+    public void showLedgerProgressDialog(int mode) {
+        dismissProgressDialog(); // just in case
+        progressDialog = new LedgerProgressDialog(BaseActivity.this, mode);
+        Ledger.setListener((Ledger.Listener) progressDialog);
+        progressDialog.show();
+    }
+
+    @Override
+    public void dismissProgressDialog() {
+        if (progressDialog == null) return; // nothing to do
+        if (progressDialog instanceof Ledger.Listener) {
+            Ledger.unsetListener((Ledger.Listener) progressDialog);
+        }
+        if (progressDialog.isShowing()) {
+            progressDialog.dismiss();
+        }
+        progressDialog = null;
+    }
+
+    static final int RELEASE_WAKE_LOCK_DELAY = 5000; // millisconds
+
+    private PowerManager.WakeLock wl = null;
+
+    void acquireWakeLock() {
+        if ((wl != null) && wl.isHeld()) return;
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        this.wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, getString(R.string.app_name));
+        try {
+            wl.acquire();
+            Timber.d("WakeLock acquired");
+        } catch (SecurityException ex) {
+            Timber.w("WakeLock NOT acquired: %s", ex.getLocalizedMessage());
+            wl = null;
+        }
+    }
+
+    void releaseWakeLock(int delayMillis) {
+        Handler handler = new Handler(Looper.getMainLooper());
+        handler.postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                releaseWakeLock();
+            }
+        }, delayMillis);
+    }
+
+    void releaseWakeLock() {
+        if ((wl == null) || !wl.isHeld()) return;
+        wl.release();
+        wl = null;
+        Timber.d("WakeLock released");
+    }
+}

app/src/main/java/com/m2049r/xmrwallet/GenerateFragment.java

@@ -16,12 +16,15 @@
 
 package com.m2049r.xmrwallet;
 
+import android.app.AlertDialog;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.design.widget.TextInputLayout;
 import android.support.v4.app.Fragment;
 import android.text.Editable;
+import android.text.Html;
 import android.text.InputType;
 import android.text.TextWatcher;
 import android.view.KeyEvent;
@@ -32,20 +35,23 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.view.inputmethod.EditorInfo;
 import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.Switch;
 import android.widget.TextView;
 
-import com.m2049r.xmrwallet.util.RestoreHeight;
-import com.m2049r.xmrwallet.widget.Toolbar;
 import com.m2049r.xmrwallet.model.Wallet;
 import com.m2049r.xmrwallet.model.WalletManager;
+import com.m2049r.xmrwallet.util.FingerprintHelper;
 import com.m2049r.xmrwallet.util.Helper;
+import com.m2049r.xmrwallet.util.KeyStoreHelper;
+import com.m2049r.xmrwallet.util.RestoreHeight;
+import com.m2049r.xmrwallet.widget.Toolbar;
 import com.nulabinc.zxcvbn.Strength;
 import com.nulabinc.zxcvbn.Zxcvbn;
 
 import java.io.File;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.util.Calendar;
 
 import timber.log.Timber;
 
@@ -55,10 +61,12 @@ public class GenerateFragment extends Fragment {
     static final String TYPE_NEW = "new";
     static final String TYPE_KEY = "key";
     static final String TYPE_SEED = "seed";
+    static final String TYPE_LEDGER = "ledger";
     static final String TYPE_VIEWONLY = "view";
 
     private TextInputLayout etWalletName;
     private TextInputLayout etWalletPassword;
+    private LinearLayout llFingerprintAuth;
     private TextInputLayout etWalletAddress;
     private TextInputLayout etWalletMnemonic;
     private TextInputLayout etWalletViewKey;
@@ -79,6 +87,7 @@ public class GenerateFragment extends Fragment {
 
         etWalletName = (TextInputLayout) view.findViewById(R.id.etWalletName);
         etWalletPassword = (TextInputLayout) view.findViewById(R.id.etWalletPassword);
+        llFingerprintAuth = (LinearLayout) view.findViewById(R.id.llFingerprintAuth);
         etWalletMnemonic = (TextInputLayout) view.findViewById(R.id.etWalletMnemonic);
         etWalletAddress = (TextInputLayout) view.findViewById(R.id.etWalletAddress);
         etWalletViewKey = (TextInputLayout) view.findViewById(R.id.etWalletViewKey);
@@ -146,6 +155,30 @@ public class GenerateFragment extends Fragment {
             }
         });
 
+        if (FingerprintHelper.isDeviceSupported(getContext())) {
+            llFingerprintAuth.setVisibility(View.VISIBLE);
+
+            final Switch swFingerprintAllowed = (Switch) llFingerprintAuth.getChildAt(0);
+            swFingerprintAllowed.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    if (!swFingerprintAllowed.isChecked()) return;
+
+                    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+                    builder.setMessage(Html.fromHtml(getString(R.string.generate_fingerprint_warn)))
+                            .setCancelable(false)
+                            .setPositiveButton(getString(R.string.label_ok), null)
+                            .setNegativeButton(getString(R.string.label_cancel), new DialogInterface.OnClickListener() {
+                                @Override
+                                public void onClick(DialogInterface dialogInterface, int i) {
+                                    swFingerprintAllowed.setChecked(false);
+                                }
+                            })
+                            .show();
+                }
+            });
+        }
+
         if (type.equals(TYPE_NEW)) {
             etWalletPassword.getEditText().setImeOptions(EditorInfo.IME_ACTION_DONE);
             etWalletPassword.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
@@ -158,6 +191,17 @@ public class GenerateFragment extends Fragment {
                     return false;
                 }
             });
+        } else if (type.equals(TYPE_LEDGER)) {
+            etWalletPassword.getEditText().setImeOptions(EditorInfo.IME_ACTION_DONE);
+            etWalletPassword.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
+                public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+                    if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) || (actionId == EditorInfo.IME_ACTION_DONE)) {
+                        etWalletRestoreHeight.requestFocus();
+                        return true;
+                    }
+                    return false;
+                }
+            });
         } else if (type.equals(TYPE_SEED)) {
             etWalletPassword.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
                 public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
@@ -359,16 +403,24 @@ public class GenerateFragment extends Fragment {
             // is it a date?
             SimpleDateFormat parser = new SimpleDateFormat("yyyy-MM-dd");
             parser.setLenient(false);
-            parser.parse(restoreHeight);
-            height = RestoreHeight.getInstance().getHeight(restoreHeight);
-        } catch (ParseException exPE) {
+            height = RestoreHeight.getInstance().getHeight(parser.parse(restoreHeight));
+        } catch (ParseException ex) {
+        }
+        if (height <= 0)
+            try {
+                // is it a date without dashes?
+                SimpleDateFormat parser = new SimpleDateFormat("yyyyMMdd");
+                parser.setLenient(false);
+                height = RestoreHeight.getInstance().getHeight(parser.parse(restoreHeight));
+            } catch (ParseException ex) {
+            }
+        if (height <= 0)
             try {
                 // or is it a height?
                 height = Long.parseLong(restoreHeight);
-            } catch (NumberFormatException exNFE) {
+            } catch (NumberFormatException ex) {
                 return -1;
             }
-        }
         Timber.d("Using Restore Height = %d", height);
         return height;
     }
@@ -423,18 +475,34 @@ public class GenerateFragment extends Fragment {
 
         String name = etWalletName.getEditText().getText().toString();
         String password = etWalletPassword.getEditText().getText().toString();
+        boolean fingerprintAuthAllowed = ((Switch) llFingerprintAuth.getChildAt(0)).isChecked();
+
+        // create the real wallet password
+        String crazyPass = KeyStoreHelper.getCrazyPass(getActivity(), password);
 
         long height = getHeight();
         if (height < 0) height = 0;
 
         if (type.equals(TYPE_NEW)) {
             bGenerate.setEnabled(false);
-            activityCallback.onGenerate(name, password);
+            if (fingerprintAuthAllowed) {
+                KeyStoreHelper.saveWalletUserPass(getActivity(), name, password);
+            }
+            activityCallback.onGenerate(name, crazyPass);
         } else if (type.equals(TYPE_SEED)) {
             if (!checkMnemonic()) return;
             String seed = etWalletMnemonic.getEditText().getText().toString();
             bGenerate.setEnabled(false);
-            activityCallback.onGenerate(name, password, seed, height);
+            if (fingerprintAuthAllowed) {
+                KeyStoreHelper.saveWalletUserPass(getActivity(), name, password);
+            }
+            activityCallback.onGenerate(name, crazyPass, seed, height);
+        } else if (type.equals(TYPE_LEDGER)) {
+            bGenerate.setEnabled(false);
+            if (fingerprintAuthAllowed) {
+                KeyStoreHelper.saveWalletUserPass(getActivity(), name, password);
+            }
+            activityCallback.onGenerateLedger(name, crazyPass, height);
         } else if (type.equals(TYPE_KEY) || type.equals(TYPE_VIEWONLY)) {
             if (checkAddress() && checkViewKey() && checkSpendKey()) {
                 bGenerate.setEnabled(false);
@@ -444,7 +512,10 @@ public class GenerateFragment extends Fragment {
                 if (type.equals(TYPE_KEY)) {
                     spendKey = etWalletSpendKey.getEditText().getText().toString();
                 }
-                activityCallback.onGenerate(name, password, address, viewKey, spendKey, height);
+                if (fingerprintAuthAllowed) {
+                    KeyStoreHelper.saveWalletUserPass(getActivity(), name, password);
+                }
+                activityCallback.onGenerate(name, crazyPass, address, viewKey, spendKey, height);
             }
         }
     }
@@ -470,6 +541,8 @@ public class GenerateFragment extends Fragment {
                 return getString(R.string.generate_wallet_type_new);
             case TYPE_SEED:
                 return getString(R.string.generate_wallet_type_seed);
+            case TYPE_LEDGER:
+                return getString(R.string.generate_wallet_type_ledger);
             case TYPE_VIEWONLY:
                 return getString(R.string.generate_wallet_type_view);
             default:
@@ -487,6 +560,8 @@ public class GenerateFragment extends Fragment {
 
         void onGenerate(String name, String password, String address, String viewKey, String spendKey, long height);
 
+        void onGenerateLedger(String name, String password, long height);
+
         void setTitle(String title);
 
         void setToolbarButton(int type);
@@ -522,6 +597,9 @@ public class GenerateFragment extends Fragment {
             case TYPE_SEED:
                 inflater.inflate(R.menu.create_wallet_seed, menu);
                 break;
+            case TYPE_LEDGER:
+                inflater.inflate(R.menu.create_wallet_ledger, menu);
+                break;
             case TYPE_VIEWONLY:
                 inflater.inflate(R.menu.create_wallet_view, menu);
                 break;

app/src/main/java/com/m2049r/xmrwallet/SecureActivity.java

@@ -16,13 +16,12 @@
 
 package com.m2049r.xmrwallet;
 
+import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
 
-import com.m2049r.xmrwallet.util.Helper;
-
-import java.io.File;
+import com.m2049r.xmrwallet.util.LocaleHelper;
 
 import static android.view.WindowManager.LayoutParams;
 
@@ -36,4 +35,9 @@ public abstract class SecureActivity extends AppCompatActivity {
             getWindow().setFlags(LayoutParams.FLAG_SECURE, LayoutParams.FLAG_SECURE);
         }
     }
+
+    @Override
+    protected void attachBaseContext(Context context) {
+        super.attachBaseContext(LocaleHelper.setLocale(context, LocaleHelper.getLocale(context)));
+    }
 }

app/src/main/java/com/m2049r/xmrwallet/TxFragment.java

@@ -59,6 +59,7 @@ public class TxFragment extends Fragment {
         TS_FORMATTER.setTimeZone(tz);
     }
 
+    private TextView tvAccount;
     private TextView tvTxTimestamp;
     private TextView tvTxId;
     private TextView tvTxKey;
@@ -88,6 +89,7 @@ public class TxFragment extends Fragment {
         tvDestinationBtc = (TextView) view.findViewById(R.id.tvDestinationBtc);
         tvTxAmountBtc = (TextView) view.findViewById(R.id.tvTxAmountBtc);
 
+        tvAccount = (TextView) view.findViewById(R.id.tvAccount);
         tvTxTimestamp = (TextView) view.findViewById(R.id.tvTxTimestamp);
         tvTxId = (TextView) view.findViewById(R.id.tvTxId);
         tvTxKey = (TextView) view.findViewById(R.id.tvTxKey);
@@ -222,6 +224,8 @@ public class TxFragment extends Fragment {
         activityCallback.setSubtitle(getString(R.string.tx_title));
         activityCallback.setToolbarButton(Toolbar.BUTTON_BACK);
 
+        tvAccount.setText(getString(R.string.tx_account_formatted, info.account, info.subaddress));
+
         tvTxTimestamp.setText(TS_FORMATTER.format(new Date(info.timestamp * 1000)));
         tvTxId.setText(info.hash);
         tvTxKey.setText(info.txKey.isEmpty() ? "-" : info.txKey);
@@ -236,9 +240,6 @@ public class TxFragment extends Fragment {
         String sign = (info.direction == TransactionInfo.Direction.Direction_In ? "+" : "-");
 
         long realAmount = info.amount;
-        if (info.isPending) {
-            realAmount = realAmount - info.fee;
-        }
         tvTxAmount.setText(sign + Wallet.getDisplayAmount(realAmount));
 
         if ((info.fee > 0)) {
@@ -286,7 +287,10 @@ public class TxFragment extends Fragment {
             }
         } else {
             sb.append("-");
-            dstSb.append(info.direction == TransactionInfo.Direction.Direction_In ? activityCallback.getWalletAddress() : "-");
+            dstSb.append(info.direction ==
+                    TransactionInfo.Direction.Direction_In ?
+                    activityCallback.getWalletSubaddress(info.account, info.subaddress) :
+                    "-");
         }
         tvTxTransfers.setText(sb.toString());
         tvDestination.setText(dstSb.toString());
@@ -321,7 +325,7 @@ public class TxFragment extends Fragment {
     Listener activityCallback;
 
     public interface Listener {
-        String getWalletAddress();
+        String getWalletSubaddress(int accountIndex, int subaddressIndex);
 
         String getTxKey(String hash);
 

app/src/main/java/com/m2049r/xmrwallet/WalletFragment.java

@@ -43,9 +43,7 @@ import com.m2049r.xmrwallet.model.Wallet;
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeApi;
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeCallback;
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeRate;
-import com.m2049r.xmrwallet.service.exchange.kraken.ExchangeApiImpl;
 import com.m2049r.xmrwallet.util.Helper;
-import com.m2049r.xmrwallet.util.OkHttpClientSingleton;
 import com.m2049r.xmrwallet.widget.Toolbar;
 
 import java.text.NumberFormat;
@@ -101,7 +99,9 @@ public class WalletFragment extends Fragment
         ivSynced = (ImageView) view.findViewById(R.id.ivSynced);
 
         sCurrency = (Spinner) view.findViewById(R.id.sCurrency);
-        sCurrency.setAdapter(ArrayAdapter.createFromResource(getContext(), R.array.currency, R.layout.item_spinner_balance));
+        ArrayAdapter currencyAdapter = ArrayAdapter.createFromResource(getContext(), R.array.currency, R.layout.item_spinner_balance);
+        currencyAdapter.setDropDownViewResource(R.layout.item_spinner_dropdown_item);
+        sCurrency.setAdapter(currencyAdapter);
 
         bSend = (Button) view.findViewById(R.id.bSend);
         bReceive = (Button) view.findViewById(R.id.bReceive);
@@ -150,7 +150,7 @@ public class WalletFragment extends Fragment
         // at this point selection is XMR in case of error
         String displayB;
         double amountA = Double.parseDouble(Wallet.getDisplayAmount(unlockedBalance)); // crash if this fails!
-        if (!"XMR".equals(balanceCurrency)) { // not XMR
+        if (!Helper.CRYPTO.equals(balanceCurrency)) { // not XMR
             double amountB = amountA * balanceRate;
             displayB = Helper.getFormattedAmount(amountB, false);
         } else { // XMR
@@ -159,10 +159,10 @@ public class WalletFragment extends Fragment
         tvBalance.setText(displayB);
     }
 
-    String balanceCurrency = "XMR";
+    String balanceCurrency = Helper.CRYPTO;
     double balanceRate = 1.0;
 
-    private final ExchangeApi exchangeApi = new ExchangeApiImpl(OkHttpClientSingleton.getOkHttpClient());
+    private final ExchangeApi exchangeApi = Helper.getExchangeApi();
 
     void refreshBalance() {
         if (sCurrency.getSelectedItemPosition() == 0) { // XMR
@@ -170,9 +170,10 @@ public class WalletFragment extends Fragment
             tvBalance.setText(Helper.getFormattedAmount(amountXmr, true));
         } else { // not XMR
             String currency = (String) sCurrency.getSelectedItem();
+            Timber.d(currency);
             if (!currency.equals(balanceCurrency) || (balanceRate <= 0)) {
                 showExchanging();
-                exchangeApi.queryExchangeRate("XMR", currency,
+                exchangeApi.queryExchangeRate(Helper.CRYPTO, currency,
                         new ExchangeCallback() {
                             @Override
                             public void onSuccess(final ExchangeRate exchangeRate) {
@@ -228,10 +229,10 @@ public class WalletFragment extends Fragment
 
     public void exchange(final ExchangeRate exchangeRate) {
         hideExchanging();
-        if (!"XMR".equals(exchangeRate.getBaseCurrency())) {
+        if (!Helper.CRYPTO.equals(exchangeRate.getBaseCurrency())) {
             Timber.e("Not XMR");
             sCurrency.setSelection(0, true);
-            balanceCurrency = "XMR";
+            balanceCurrency = Helper.CRYPTO;
             balanceRate = 1.0;
         } else {
             int spinnerPosition = ((ArrayAdapter) sCurrency.getAdapter()).getPosition(exchangeRate.getQuoteCurrency());
@@ -256,7 +257,7 @@ public class WalletFragment extends Fragment
     // called from activity
 
     public void onRefreshed(final Wallet wallet, final boolean full) {
-        Timber.d("onRefreshed()");
+        Timber.d("onRefreshed(%b)", full);
         if (full) {
             List<TransactionInfo> list = wallet.getHistory().getAll();
             adapter.setInfos(list);
@@ -270,6 +271,7 @@ public class WalletFragment extends Fragment
             bSend.setVisibility(View.VISIBLE);
             bSend.setEnabled(true);
         }
+        if (isVisible()) enableAccountsList(true); //otherwise it is enabled in onResume()
     }
 
     boolean walletLoaded = false;
@@ -313,7 +315,7 @@ public class WalletFragment extends Fragment
         if (wallet == null) return;
         walletTitle = wallet.getName();
         String watchOnly = (wallet.isWatchOnly() ? getString(R.string.label_watchonly) : "");
-        walletSubtitle = wallet.getAddress().substring(0, 10) + "…" + watchOnly;
+        walletSubtitle = wallet.getAccountLabel();
         activityCallback.setTitle(walletTitle, walletSubtitle);
         Timber.d("wallet title is %s", walletTitle);
     }
@@ -323,10 +325,13 @@ public class WalletFragment extends Fragment
     private String walletSubtitle = null;
     private long unlockedBalance = 0;
 
+    private int accountIdx = -1;
+
     private void updateStatus(Wallet wallet) {
         if (!isAdded()) return;
         Timber.d("updateStatus()");
-        if (walletTitle == null) {
+        if ((walletTitle == null) || (accountIdx != wallet.getAccountIndex())) {
+            accountIdx = wallet.getAccountIndex();
             setActivityTitle(wallet);
         }
         long balance = wallet.getBalance();
@@ -352,7 +357,7 @@ public class WalletFragment extends Fragment
                 setProgress(x);
                 ivSynced.setVisibility(View.GONE);
             } else {
-                sync = getString(R.string.status_synced) + formatter.format(wallet.getBlockChainHeight());
+                sync = getString(R.string.status_synced) + " " + formatter.format(wallet.getBlockChainHeight());
                 ivSynced.setVisibility(View.VISIBLE);
             }
         } else {
@@ -412,9 +417,28 @@ public class WalletFragment extends Fragment
         super.onResume();
         Timber.d("onResume()");
         activityCallback.setTitle(walletTitle, walletSubtitle);
-        activityCallback.setToolbarButton(Toolbar.BUTTON_CLOSE);
+        //activityCallback.setToolbarButton(Toolbar.BUTTON_CLOSE); // TODO: Close button somewhere else
+        activityCallback.setToolbarButton(Toolbar.BUTTON_NONE);
         setProgress(syncProgress);
         setProgress(syncText);
         showReceive();
+        if (activityCallback.isSynced()) enableAccountsList(true);
     }
+
+    @Override
+    public void onPause() {
+        enableAccountsList(false);
+        super.onPause();
+    }
+
+    public interface DrawerLocker {
+        void setDrawerEnabled(boolean enabled);
+    }
+
+    private void enableAccountsList(boolean enable) {
+        if (activityCallback instanceof DrawerLocker) {
+            ((DrawerLocker) activityCallback).setDrawerEnabled(enable);
+        }
+    }
+
 }

app/src/main/java/com/m2049r/xmrwallet/XmrWalletApplication.java

@@ -18,8 +18,10 @@ package com.m2049r.xmrwallet;
 
 
 import android.app.Application;
+import android.content.Context;
+import android.content.res.Configuration;
 
-import com.m2049r.xmrwallet.util.Helper;
+import com.m2049r.xmrwallet.util.LocaleHelper;
 
 import timber.log.Timber;
 
@@ -27,9 +29,21 @@ public class XmrWalletApplication extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
-        
+
         if (BuildConfig.DEBUG) {
             Timber.plant(new Timber.DebugTree());
         }
     }
+
+    @Override
+    protected void attachBaseContext(Context context) {
+        super.attachBaseContext(LocaleHelper.setLocale(context, LocaleHelper.getLocale(context)));
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration configuration) {
+        super.onConfigurationChanged(configuration);
+        LocaleHelper.updateSystemDefaultLocale(configuration.locale);
+        LocaleHelper.setLocale(XmrWalletApplication.this, LocaleHelper.getLocale(XmrWalletApplication.this));
+    }
 }

app/src/main/java/com/m2049r/xmrwallet/data/WalletNode.java

@@ -86,6 +86,10 @@ public class WalletNode {
         return name;
     }
 
+    public NetworkType getNetworkType() {
+        return networkType;
+    }
+
     public String getAddress() {
         return host + ":" + port;
     }

app/src/main/java/com/m2049r/xmrwallet/dialog/ProgressDialog.java

@@ -0,0 +1,130 @@
+package com.m2049r.xmrwallet.dialog;
+
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ * Copyright (C) 2018 m2049r
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import com.m2049r.xmrwallet.R;
+
+import java.util.Locale;
+
+import timber.log.Timber;
+
+public class ProgressDialog extends AlertDialog {
+
+    private ProgressBar pbBar;
+
+    private TextView tvMessage;
+
+    private TextView tvProgress;
+
+    private View rlProgressBar, pbCircle;
+
+    static private final String PROGRESS_FORMAT = "%1d/%2d";
+
+    private CharSequence message;
+    private int maxValue, progressValue;
+    private boolean indeterminate = true;
+
+    public ProgressDialog(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        final View view = LayoutInflater.from(getContext()).inflate(R.layout.dialog_ledger_progress, null);
+        pbCircle = view.findViewById(R.id.pbCircle);
+        tvMessage = (TextView) view.findViewById(R.id.tvMessage);
+        rlProgressBar = view.findViewById(R.id.rlProgressBar);
+        pbBar = (ProgressBar) view.findViewById(R.id.pbBar);
+        tvProgress = (TextView) view.findViewById(R.id.tvProgress);
+        setView(view);
+        //setTitle("blabla");
+        //super.setMessage("bubbu");
+//        view.invalidate();
+        setIndeterminate(indeterminate);
+        if (maxValue > 0) {
+            setMax(maxValue);
+        }
+        if (progressValue > 0) {
+            setProgress(progressValue);
+        }
+        if (message != null) {
+            Timber.d("msg=%s", message);
+            setMessage(message);
+        }
+
+        super.onCreate(savedInstanceState);
+    }
+
+    public void setProgress(int value, int max) {
+        progressValue = value;
+        maxValue = max;
+        if (pbBar != null) {
+            pbBar.setProgress(value);
+            pbBar.setMax(max);
+            tvProgress.setText(String.format(Locale.getDefault(), PROGRESS_FORMAT, value, maxValue));
+        }
+    }
+
+    public void setProgress(int value) {
+        progressValue = value;
+        if (pbBar != null) {
+            pbBar.setProgress(value);
+            tvProgress.setText(String.format(Locale.getDefault(), PROGRESS_FORMAT, value, maxValue));
+        }
+    }
+
+    public void setMax(int max) {
+        maxValue = max;
+        if (pbBar != null) {
+            pbBar.setMax(max);
+        }
+    }
+
+    public void setIndeterminate(boolean indeterminate) {
+        if (this.indeterminate != indeterminate) {
+            if (rlProgressBar != null) {
+                if (indeterminate) {
+                    pbCircle.setVisibility(View.VISIBLE);
+                    rlProgressBar.setVisibility(View.GONE);
+                } else {
+                    pbCircle.setVisibility(View.GONE);
+                    rlProgressBar.setVisibility(View.VISIBLE);
+                }
+            }
+            this.indeterminate = indeterminate;
+        }
+    }
+
+    @Override
+    public void setMessage(CharSequence message) {
+        this.message = message;
+        if (tvMessage != null) {
+            tvMessage.setText(message);
+        }
+    }
+}

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendAddressWizardFragment.java

@@ -233,7 +233,7 @@ public class SendAddressWizardFragment extends SendWizardFragment {
 
     private boolean isBitcoinAddress() {
         String address = etAddress.getEditText().getText().toString();
-        if ((address.length() >= 27) && (address.length() <= 34))
+        if ((address.length() >= 27) && (address.length() <= 35))
             return BitcoinAddressValidator.validate(address);
         else
             return false;

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendAmountWizardFragment.java

@@ -20,6 +20,9 @@ import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import com.m2049r.xmrwallet.R;
@@ -57,8 +60,9 @@ public class SendAmountWizardFragment extends SendWizardFragment {
 
     private TextView tvFunds;
     private ExchangeTextView evAmount;
-    //private Button bSendAll;
-    private NumberPadView numberPad;
+    private View llAmount;
+    private View rlSweep;
+    private ImageButton ibSweep;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -73,37 +77,64 @@ public class SendAmountWizardFragment extends SendWizardFragment {
         tvFunds = (TextView) view.findViewById(R.id.tvFunds);
 
         evAmount = (ExchangeTextView) view.findViewById(R.id.evAmount);
-        numberPad = (NumberPadView) view.findViewById(R.id.numberPad);
-        numberPad.setListener(evAmount);
+        ((NumberPadView) view.findViewById(R.id.numberPad)).setListener(evAmount);
 
-        /*
-        bSendAll = (Button) view.findViewById(R.id.bSendAll);
-        bSendAll.setOnClickListener(new View.OnClickListener() {
+        rlSweep = view.findViewById(R.id.rlSweep);
+        llAmount = view.findViewById(R.id.llAmount);
+        view.findViewById(R.id.ivSweep).setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                // TODO: send all - figure out how to display this
+                sweepAll(false);
+            }
+        });
+
+        ibSweep = (ImageButton) view.findViewById(R.id.ibSweep);
+
+        ibSweep.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                sweepAll(true);
             }
         });
-*/
 
         Helper.hideKeyboard(getActivity());
 
         return view;
     }
 
+    private boolean spendAllMode = false;
+
+    private void sweepAll(boolean spendAllMode) {
+        if (spendAllMode) {
+            ibSweep.setVisibility(View.INVISIBLE);
+            llAmount.setVisibility(View.GONE);
+            rlSweep.setVisibility(View.VISIBLE);
+        } else {
+            ibSweep.setVisibility(View.VISIBLE);
+            llAmount.setVisibility(View.VISIBLE);
+            rlSweep.setVisibility(View.GONE);
+        }
+        this.spendAllMode = spendAllMode;
+    }
 
     @Override
     public boolean onValidateFields() {
-        if (!evAmount.validate(maxFunds)) {
-            return false;
-        }
+        if (spendAllMode) {
+            if (sendListener != null) {
+                sendListener.getTxData().setAmount(Wallet.SWEEP_ALL);
+            }
+        } else {
+            if (!evAmount.validate(maxFunds)) {
+                return false;
+            }
 
-        if (sendListener != null) {
-            String xmr = evAmount.getAmount();
-            if (xmr != null) {
-                sendListener.getTxData().setAmount(Wallet.getAmountFromString(xmr));
-            } else {
-                sendListener.getTxData().setAmount(0L);
+            if (sendListener != null) {
+                String xmr = evAmount.getAmount();
+                if (xmr != null) {
+                    sendListener.getTxData().setAmount(Wallet.getAmountFromString(xmr));
+                } else {
+                    sendListener.getTxData().setAmount(0L);
+                }
             }
         }
         return true;

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendBtcAmountWizardFragment.java

@@ -247,7 +247,7 @@ public class SendBtcAmountWizardFragment extends SendWizardFragment {
 
     private XmrToApi xmrToApi = null;
 
-    private final XmrToApi getXmrToApi() {
+    private XmrToApi getXmrToApi() {
         if (xmrToApi == null) {
             synchronized (this) {
                 if (xmrToApi == null) {

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendFragment.java

@@ -47,6 +47,7 @@ import com.m2049r.xmrwallet.layout.SpendViewPager;
 import com.m2049r.xmrwallet.model.PendingTransaction;
 import com.m2049r.xmrwallet.util.Helper;
 import com.m2049r.xmrwallet.util.NodeList;
+import com.m2049r.xmrwallet.util.Notice;
 import com.m2049r.xmrwallet.util.UserNotes;
 import com.m2049r.xmrwallet.widget.DotBar;
 import com.m2049r.xmrwallet.widget.Toolbar;
@@ -119,27 +120,8 @@ public class SendFragment extends Fragment
         arrowPrev = getResources().getDrawable(R.drawable.ic_navigate_prev_white_24dp);
         arrowNext = getResources().getDrawable(R.drawable.ic_navigate_next_white_24dp);
 
-        llXmrToEnabled = view.findViewById(R.id.llXmrToEnabled);
-        llXmrToEnabled.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                HelpFragment.display(getChildFragmentManager(), R.string.help_xmrto);
-
-            }
-        });
-        ibXmrToInfoClose = view.findViewById(R.id.ibXmrToInfoClose);
-        ibXmrToInfoClose.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                llXmrToEnabled.setVisibility(View.GONE);
-                showXmrtoEnabled = false;
-                saveXmrToPrefs();
-            }
-        });
-        loadPrefs();
-        if (!showXmrtoEnabled) {
-            llXmrToEnabled.setVisibility(View.GONE);
-        }
+        ViewGroup llNotice = (ViewGroup) view.findViewById(R.id.llNotice);
+        Notice.showAll(llNotice,".*_send");
 
         spendViewPager = (SpendViewPager) view.findViewById(R.id.pager);
         pagerAdapter = new SpendPagerAdapter(getChildFragmentManager());
@@ -291,7 +273,7 @@ public class SendFragment extends Fragment
                     pagerAdapter.notifyDataSetChanged();
                 }
             });
-            Timber.d("New Mode = " + mode.toString());
+            Timber.d("New Mode = %s", mode.toString());
         }
     }
 
@@ -350,7 +332,7 @@ public class SendFragment extends Fragment
         @Override
         public SendWizardFragment getItem(int position) {
             Timber.d("getItem(%d) CREATE", position);
-            Timber.d("Mode=" + mode.toString());
+            Timber.d("Mode=%s", mode.toString());
             if (mode == Mode.XMR) {
                 switch (position) {
                     case POS_ADDRESS:

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendSettingsWizardFragment.java

@@ -36,6 +36,7 @@ import com.m2049r.xmrwallet.util.UserNotes;
 import timber.log.Timber;
 
 public class SendSettingsWizardFragment extends SendWizardFragment {
+    final static public int MIXIN = 6;
 
     public static SendSettingsWizardFragment newInstance(Listener listener) {
         SendSettingsWizardFragment instance = new SendSettingsWizardFragment();
@@ -54,15 +55,12 @@ public class SendSettingsWizardFragment extends SendWizardFragment {
         TxData getTxData();
     }
 
-    // Mixin = Ringsize - 1
-    final static int Mixins[] = {6, 9, 12, 25}; // must match the layout XML / "@array/mixin"
     final static PendingTransaction.Priority Priorities[] =
             {PendingTransaction.Priority.Priority_Default,
                     PendingTransaction.Priority.Priority_Low,
                     PendingTransaction.Priority.Priority_Medium,
                     PendingTransaction.Priority.Priority_High}; // must match the layout XML
 
-    private Spinner sMixin;
     private Spinner sPriority;
     private EditText etNotes;
     private EditText etDummy;
@@ -77,7 +75,6 @@ public class SendSettingsWizardFragment extends SendWizardFragment {
         View view = inflater.inflate(
                 R.layout.fragment_send_settings, container, false);
 
-        sMixin = (Spinner) view.findViewById(R.id.sMixin);
         sPriority = (Spinner) view.findViewById(R.id.sPriority);
 
         etNotes = (EditText) view.findViewById(R.id.etNotes);
@@ -104,7 +101,7 @@ public class SendSettingsWizardFragment extends SendWizardFragment {
         if (sendListener != null) {
             TxData txData = sendListener.getTxData();
             txData.setPriority(Priorities[sPriority.getSelectedItemPosition()]);
-            txData.setMixin(Mixins[sMixin.getSelectedItemPosition()]);
+            txData.setMixin(MIXIN);
             txData.setUserNotes(new UserNotes(etNotes.getText().toString()));
         }
         return true;

app/src/main/java/com/m2049r/xmrwallet/layout/TransactionInfoAdapter.java

@@ -166,7 +166,11 @@ public class TransactionInfoAdapter extends RecyclerView.Adapter<TransactionInfo
             }
 
             if ((userNotes.note.isEmpty())) {
-                this.tvPaymentId.setText(infoItem.paymentId.equals("0000000000000000") ? "" : infoItem.paymentId);
+                this.tvPaymentId.setText(infoItem.paymentId.equals("0000000000000000") ?
+                        (infoItem.subaddress != 0 ?
+                                (context.getString(R.string.tx_subaddress, infoItem.subaddress)) :
+                                "") :
+                        infoItem.paymentId);
             } else {
                 this.tvPaymentId.setText(userNotes.note);
             }

app/src/main/java/com/m2049r/xmrwallet/ledger/Instruction.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2018 m2049r
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.m2049r.xmrwallet.ledger;
+
+public enum Instruction {
+    INS_NONE(0x00),
+    INS_RESET(0x02),
+    INS_GET_KEY(0x20),
+    INS_PUT_KEY(0x22),
+    INS_GET_CHACHA8_PREKEY(0x24),
+    INS_VERIFY_KEY(0x26),
+
+    INS_SECRET_KEY_TO_PUBLIC_KEY(0x30),
+    INS_GEN_KEY_DERIVATION(0x32),
+    INS_DERIVATION_TO_SCALAR(0x34),
+    INS_DERIVE_PUBLIC_KEY(0x36),
+    INS_DERIVE_SECRET_KEY(0x38),
+    INS_GEN_KEY_IMAGE(0x3A),
+    INS_SECRET_KEY_ADD(0x3C),
+    INS_SECRET_KEY_SUB(0x3E),
+    INS_GENERATE_KEYPAIR(0x40),
+    INS_SECRET_SCAL_MUL_KEY(0x42),
+    INS_SECRET_SCAL_MUL_BASE(0x44),
+
+    INS_DERIVE_SUBADDRESS_PUBLIC_KEY(0x46),
+    INS_GET_SUBADDRESS(0x48),
+    INS_GET_SUBADDRESS_SPEND_PUBLIC_KEY(0x4A),
+    INS_GET_SUBADDRESS_SECRET_KEY(0x4C),
+
+    INS_OPEN_TX(0x70),
+    INS_SET_SIGNATURE_MODE(0x72),
+    INS_GET_ADDITIONAL_KEY(0x74),
+    INS_STEALTH(0x76),
+    INS_BLIND(0x78),
+    INS_UNBLIND(0x7A),
+    INS_VALIDATE(0x7C),
+    INS_MLSAG(0x7E),
+    INS_CLOSE_TX(0x80),
+
+    INS_GET_RESPONSE(0xc0),
+
+    INS_UNDEFINED(0xff);;
+
+    public static Instruction fromByte(byte n) {
+        switch (n & 0xFF) {
+            case 0x00:
+                return INS_NONE;
+            case 0x02:
+                return INS_RESET;
+
+            case 0x20:
+                return INS_GET_KEY;
+            case 0x22:
+                return INS_PUT_KEY;
+            case 0x24:
+                return INS_GET_CHACHA8_PREKEY;
+            case 0x26:
+                return INS_VERIFY_KEY;
+
+            case 0x30:
+                return INS_SECRET_KEY_TO_PUBLIC_KEY;
+            case 0x32:
+                return INS_GEN_KEY_DERIVATION;
+            case 0x34:
+                return INS_DERIVATION_TO_SCALAR;
+            case 0x36:
+                return INS_DERIVE_PUBLIC_KEY;
+            case 0x38:
+                return INS_DERIVE_SECRET_KEY;
+            case 0x3A:
+                return INS_GEN_KEY_IMAGE;
+            case 0x3C:
+                return INS_SECRET_KEY_ADD;
+            case 0x3E:
+                return INS_SECRET_KEY_SUB;
+            case 0x40:
+                return INS_GENERATE_KEYPAIR;
+            case 0x42:
+                return INS_SECRET_SCAL_MUL_KEY;
+            case 0x44:
+                return INS_SECRET_SCAL_MUL_BASE;
+
+            case 0x46:
+                return INS_DERIVE_SUBADDRESS_PUBLIC_KEY;
+            case 0x48:
+                return INS_GET_SUBADDRESS;
+            case 0x4A:
+                return INS_GET_SUBADDRESS_SPEND_PUBLIC_KEY;
+            case 0x4C:
+                return INS_GET_SUBADDRESS_SECRET_KEY;
+
+            case 0x70:
+                return INS_OPEN_TX;
+            case 0x72:
+                return INS_SET_SIGNATURE_MODE;
+            case 0x74:
+                return INS_GET_ADDITIONAL_KEY;
+            case 0x76:
+                return INS_STEALTH;
+            case 0x78:
+                return INS_BLIND;
+            case 0x7A:
+                return INS_UNBLIND;
+            case 0x7C:
+                return INS_VALIDATE;
+            case 0x7E:
+                return INS_MLSAG;
+            case 0x80:
+                return INS_CLOSE_TX;
+
+            case 0xc0:
+                return INS_GET_RESPONSE;
+
+            default:
+                return INS_UNDEFINED;
+        }
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    private int value;
+
+    Instruction(int value) {
+        this.value = value;
+    }
+}