98 lines
5.3 KiB
Markdown
98 lines
5.3 KiB
Markdown
# SilentDragonAndroid
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A sample Android wallet using the [Hush Android SDK](https://git.hush.is/hush/hush-android-wallet-sdk) which is based on the [Zcash Android SDK](https://github.com/zcash/zcash-android-wallet-sdk).
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### Motivation
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[Dogfooding](https://en.wikipedia.org/wiki/Eating_your_own_dog_food) - _transitive verb_ - is the practice of an organization using its own product. This app was created to help us learn.
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# Disclaimers
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There are some known areas for improvement:
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- This app is mainly intended for learning and improving the related libraries that it uses. There may be bugs.
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- Traffic analysis, like in other cryptocurrency wallets, can leak some privacy of the user.
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- The wallet requires a trust in the server to display accurate transaction information.
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See the upstream Zcash [Wallet App Threat Model](https://zcash.readthedocs.io/en/latest/rtd_pages/wallet_threat_model.html)
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for more information about the security and privacy limitations of the wallet.
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If you'd like to help us test, reach out on [Telegram](https://hush.is/tg) or [Matrix](https://hush.is/matrix) and let us know! We're always happy to get feedback!
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# Description
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This a sample wallet for the following set of features:
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- z2z transactions with encrypted memos
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- reply-to formatted memos
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# Prerequisites
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- [The app code](https://git.hush.is/hush/SilentDragonAndroid/)
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- [The SDK code](https://git.hush.is/hush/hush-android-wallet-sdk)
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- [Android Studio](https://developer.android.com/studio/index.html) last tested with Android Studio Dolphin | 2021.3.1 Patch 1 or [adb](https://www.xda-developers.com/what-is-adb/)
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- An Android device or emulator. Android 10 or higher is recommended.
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# Building the App
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1. Clone the SDK:
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```git clone https://git.hush.is/hush/hush-android-wallet-sdk.git```
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2. Add any new checkpoints to the SDK - Checkpoints are located in ```hush-android-wallet-sdk\sdk-lib\src\main\assets\co.electriccoin.zcash\checkpoint\mainnet``` You may use the [sda_checkpoints.pl](https://git.hush.is/hush/hush3/src/branch/dev/contrib/sda_checkpoints.pl) script and modify the start and end block heights accordingly.
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By default, this script will generate many checkpoints in a single file IE: ```./contrib/sda_checkpoints.pl > newcheckpoints.json```. You may then copy/paste to individual .json files named as the block height the checkpoint is for or modify this script to save individual .json files for each block height.
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3. Compile and publish the SDK locally as the app's code currently relies on mavenLocal for the SDK.
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```
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./gradlew clean
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./gradlew build
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./gradlew build publishToMavenLocal
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```
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4. Clone the app repo:
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```git clone https://git.hush.is/hush/SilentDragonAndroid.git```
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5. Open the app in Android Studio and press play to install and run on connected device. It should just work.™
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6. If you want to build APKs instead of installing on a device or emulator, select Build > Build Bundle(s) / APK(s) > Build APK(s)
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## Install from Android Studio
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1. [Install Android Studio](https://developer.android.com/studio/install) and setup an emulator
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1a. If using a device, be sure to [put it in developer mode](https://developer.android.com/studio/debug/dev-options) to enable side-loading apps
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2. `Import` the SilentDragonAndroid folder.
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It will be recognized as an Android project.
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3. Press play (once it is done opening and indexing)
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## OR Install from the command line
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To build from the command line, [setup ADB](https://www.xda-developers.com/install-adb-windows-macos-linux/) and connect your device. Then simply run this and it will both build and install the app:
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```bash
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cd /path/to/SilentDragonAndroid
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./gradlew
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```
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Note: The lack of an explicit Gradle task is not a typo. A default task is configured via [build.gradle.kts](build.gradle.kts).
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Tip: On macOS and Linux, Gradle is invoked with `./gradlew`. On Windows, Gradle is invoked with `gradlew`.
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# Included builds
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These notes are included from upstream and for reference only if looking to create an included build. To simplify implementation of SDK features in conjunction with changes to the app, a Gradle [Included Build](https://docs.gradle.org/current/userguide/composite_builds.html) can be configured.
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1. Check out the SDK to a directory path of `../hush-android-wallet-sdk` relative to the root of this app's repo. For example:
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parent/
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SilentDragonAndroid/
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hush-android-wallet-sdk/
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1. Verify that the `hush-android-wallet-sdk` builds correctly on its own
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1. Build `SilentDragonAndroid`, setting the Gradle property `IS_SDK_INCLUDED_BUILD=true`
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There are some limitations of included builds:
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1. Properties from `SilentDragonAndroid` will override those set in `hush-android-wallet-sdk` with the same name
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1. Modules in each project cannot share the same name. For this reason, build-conventions have different names in each repo (`hush-android-wallet-sdk/build-conventions` vs `other-android-wallet/build-convention`)
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1. Kotlin and KSP versions will need to be coordinated between the two projects, because KSP is tightly coupled to the Kotlin version
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# Contributing
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Contributions are very much welcomed! Contact us on [Telegram](https://hush.is/tg) or [Matrix](https://hush.is/matrix) .
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# Reporting an issue
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Contact us on [Telegram](https://hush.is/tg) or [Matrix](https://hush.is/matrix)
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# Copyright
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Copyright 2016-2023 The Hush developers
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# License
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GPLv3
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