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Pillar Wallet for iOS and Android
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poocart Merge pull request #1208 from pillarwallet/feature/add-exchange-featu…

added feature flag wrap over exchange feature
Latest commit 90c1ecd Jun 25, 2019
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.circleci Change slack notification for prod-android deployment Jun 11, 2019
.vscode Feature/implement new home tab design (#371) Aug 3, 2018
.whitesource Changed WS job trigger Dec 27, 2018
android Change exchange tab icon Jun 25, 2019
environments update to latest develop Jun 25, 2019
flow-typed fix flow error for global Reactotron declaration Apr 14, 2019
ios Change exchange tab icon Jun 25, 2019
src Merge branch 'develop' into feature/add-exchange-feature-flag Jun 25, 2019
.babelrc set IS_TEST process.env variable for jest Apr 14, 2019
.editorconfig Feature/improvements (#8) Apr 10, 2018
.env update to latest develop Jun 25, 2019
.eslintignore Remove storybook (#414) Aug 10, 2018
.eslintrc Merge conflicts resolved. Mar 18, 2019
.flowconfig WIP: Connect reselect and convert balances to the new format May 8, 2019
.gitignore Use separate Gemfile's for Android and iOS Nov 26, 2018
.watchmanconfig Initial commit Apr 5, 2018
App.js wait until feature flags are put to reducer state May 24, 2019
App.test.js Added copyright disclaimer notices Jan 28, 2019 Incorporating team commentary around peer review Nov 29, 2018 Update readme Apr 30, 2019
android-react-gradle-fix Removed gradle built rn-libs Apr 14, 2019
android-release-gradle-fix.js Removed gradle built rn-libs Apr 14, 2019
index.js Added copyright disclaimer notices Jan 28, 2019
index.thread.js Extended generation of connection keys for imported connections Mar 12, 2019
package.json Add search to SelectorInput options list Jun 25, 2019
reactotron.config.js update README with extra info about reacotron. Fix reactotron-redux c… Apr 27, 2019
yarn.lock Add search to SelectorInput options list Jun 25, 2019

Pillar Wallet

Pull Request Review

The following set of criteria and guideline has been set for code reviews Pillar Pull Request and Code Review Guidelines


  • Watchman brew install watchman
  • node versions 9.11.1, 10.x (The app was tested to run with those versions without problems)


  • java v1.8
  • android studio (suggested 3.2.1)


  • Homebrew
  • yarn v1.10.x
  • XCode 9.4 (Please refer to notes below to understand the problem with XCode 10)

note: XCode 10 includes CommonCrypto as part of the sdk which triggers a Redefinition of module because rn-signal-protocol-messaging declares it as dependency, currently there's a fix being tested to work with XCode 10 and XCode 9.4, however while this note is here please use XCode 9.4

Install and Run

To get started clone the repo and run

yarn install

This will download all the necessary packages to build the project. The project can be deployed using the simple command of yarn start. This will get your project running in development mode.

note: if you want to keep the metro server running on its own console just run yarn start

Running on iOS:

The project may be run from the directory using

yarn run ios

Running on Android:

Like yarn start, but also attempts to open your app in the iOS Simulator if you're on a Mac and have it installed.

yarn run android

note: after any compilation (i.e. after linking a native library) please restart the metro server


Debug implies checking logs and be able to stop on specific breakpoints. For the first requirement (watch logs) there're two options. If you want to stop on breakpoints then only the first option is for you. However if what you want is just to track or set the logs, then Reactotron will be, probably, more effective.

React Native Debugger

First, you need to install the React Native Debugger brew update && brew cask install react-native-debugger

Press ⌘+D on iOS simulator, ⌘+M on Android emulator, or shake real devices, you will see the in-app developer menu. Tap “Debug JS Remotely”. The React Native Debugger will be opened automatically. Open source files in the Sources tab, you can set breakpoints here.


Install Reactotron for your specific platform (here's the download page)

Start your application an open Reactotron, that's it!

There's one change, instead of adding console.log('something to log') you should use Reactotron.log('something to log')


For android you'd probably need to execute following command adb reverse tcp:9090 tcp:9090

Redux State

In order to view the state go to the state window, here you need to add the view (subscription) first. Press Cmd+n, no need to enter anything specific, just click on Subscribe.

Network Requests

If you head to the Network and find your XHR requests are not being logged, you will notice that you are unable to see any. You must first enable them by right clicking in the React Devtools or Redux Devtools section and clicking Enable Network Inspect.

Useful Links on Debugging:

App configuration

Add your app configuration in an .env file.


Now you can import it in your .js file.

import { API_KEY, ANOTHER_CONFIG } from 'react-native-dotenv'


How does it works?

As you can see, it's implemented as a babel plugin. All referenced imported members are replaced as the values specified in the .env file.

The example above will get compiled as below.

ApiClient.init('lorem', 'foobar')

In Production

Simply create a separate .env.production file and the default release process of react-native will pickup the right config.

Resource Links:

Old CRNA Readme

This project was bootstrapped with Create React Native App.

Below you'll find information about performing common tasks. The most recent version of this guide is available here.

Table of Contents

Updating to New Releases

You should only need to update the global installation of create-react-native-app very rarely, ideally never.

Updating the react-native-scripts dependency of your app should be as simple as bumping the version number in package.json and reinstalling your project's dependencies.

Upgrading to a new version of React Native requires updating the react-native, react, and expo package versions, and setting the correct sdkVersion in app.json. See the versioning guide for up-to-date information about package version compatibility.

Available Scripts

If Yarn was installed when the project was initialized, then dependencies will have been installed via Yarn, and you should probably use it to run these commands as well. Unlike dependency installation, command running syntax is identical for Yarn and NPM at the time of this writing.

npm start

Runs your app in development mode.

Open it in the Expo app on your phone to view it. It will reload if you save edits to your files, and you will see build errors and logs in the terminal.

npm test

Runs the jest test runner on your tests.

npm run ios

Like npm start, but also attempts to open your app in the iOS Simulator if you're on a Mac and have it installed.

npm run android

Like npm start, but also attempts to open your app on a connected Android device or emulator. Requires an installation of Android build tools (see React Native docs for detailed setup). We also recommend installing Genymotion as your Android emulator. Once you've finished setting up the native build environment, there are two options for making the right copy of adb available to Create React Native App:

Using Android Studio's adb
  1. Make sure that you can run adb from your terminal.
  2. Open Genymotion and navigate to Settings -> ADB. Select “Use custom Android SDK tools” and update with your Android SDK directory.
Using Genymotion's adb
  1. Find Genymotion’s copy of adb. On macOS for example, this is normally /Applications/
  2. Add the Genymotion tools directory to your path (instructions for Mac, Linux, and Windows).
  3. Make sure that you can run adb from your terminal.

npm run eject

This will start the process of "ejecting" from Create React Native App's build scripts. You'll be asked a couple of questions about how you'd like to build your project.

Warning: Running eject is a permanent action (aside from whatever version control system you use). An ejected app will require you to have an Xcode and/or Android Studio environment set up.

Customizing App Display Name and Icon

You can edit app.json to include configuration keys under the expo key.

To change your app's display name, set the key in app.json to an appropriate string.

To set an app icon, set the expo.icon key in app.json to be either a local path or a URL. It's recommended that you use a 512x512 png file with transparency.

Writing and Running Tests

This project is set up to use jest for tests. You can configure whatever testing strategy you like, but jest works out of the box. Create test files in directories called __tests__ or with the .test extension to have the files loaded by jest. See the the template project for an example test. The jest documentation is also a wonderful resource, as is the React Native testing tutorial.

Environment Variables

You can configure some of Create React Native App's behavior using environment variables.

Configuring Packager IP Address

When starting your project, you'll see something like this for your project URL:


The "manifest" at that URL tells the Expo app how to retrieve and load your app's JavaScript bundle, so even if you load it in the app via a URL like exp://localhost:19000, the Expo client app will still try to retrieve your app at the IP address that the start script provides.

In some cases, this is less than ideal. This might be the case if you need to run your project inside of a virtual machine and you have to access the packager via a different IP address than the one which prints by default. In order to override the IP address or hostname that is detected by Create React Native App, you can specify your own hostname via the REACT_NATIVE_PACKAGER_HOSTNAME environment variable:

Mac and Linux:

REACT_NATIVE_PACKAGER_HOSTNAME='my-custom-ip-address-or-hostname' npm start


set REACT_NATIVE_PACKAGER_HOSTNAME='my-custom-ip-address-or-hostname'
npm start

The above example would cause the development server to listen on exp://my-custom-ip-address-or-hostname:19000.

Adding Flow

Flow is a static type checker that helps you write code with fewer bugs. Check out this introduction to using static types in JavaScript if you are new to this concept.

React Native works with Flow out of the box, as long as your Flow version matches the one used in the version of React Native.

To add a local dependency to the correct Flow version to a Create React Native App project, follow these steps:

  1. Find the Flow [version] at the bottom of the included .flowconfig
  2. Run npm install --save-dev flow-bin@x.y.z (or yarn add --dev flow-bin@x.y.z), where x.y.z is the .flowconfig version number.
  3. Add "flow": "flow" to the scripts section of your package.json.
  4. Add // @flow to any files you want to type check (for example, to App.js).

Now you can run npm run flow (or yarn flow) to check the files for type errors. You can optionally use a plugin for your IDE or editor for a better integrated experience.

To learn more about Flow, check out its documentation.

Sharing and Deployment

Create React Native App does a lot of work to make app setup and development simple and straightforward, but it's very difficult to do the same for deploying to Apple's App Store or Google's Play Store without relying on a hosted service.

Publishing to Expo's React Native Community

Expo provides free hosting for the JS-only apps created by CRNA, allowing you to share your app through the Expo client app. This requires registration for an Expo account.

Install the exp command-line tool, and run the publish command:

$ npm i -g exp
$ exp publish

Building an Expo "standalone" app

You can also use a service like Expo's standalone builds if you want to get an IPA/APK for distribution without having to build the native code yourself.

Ejecting from Create React Native App

If you want to build and deploy your app yourself, you'll need to eject from CRNA and use Xcode and Android Studio.

This is usually as simple as running npm run eject in your project, which will walk you through the process. Make sure to install react-native-cli and follow the native code getting started guide for React Native.

Should I Use ExpoKit?

If you have made use of Expo APIs while working on your project, then those API calls will stop working if you eject to a regular React Native project. If you want to continue using those APIs, you can eject to "React Native + ExpoKit" which will still allow you to build your own native code and continue using the Expo APIs. See the ejecting guide for more details about this option.



If you're unable to load your app on your phone due to a network timeout or a refused connection, a good first step is to verify that your phone and computer are on the same network and that they can reach each other. Create React Native App needs access to ports 19000 and 19001 so ensure that your network and firewall settings allow access from your device to your computer on both of these ports.

Try opening a web browser on your phone and opening the URL that the packager script prints, replacing exp:// with http://. So, for example, if underneath the QR code in your terminal you see:


Try opening Safari or Chrome on your phone and loading


If this works, but you're still unable to load your app by scanning the QR code, please open an issue on the Create React Native App repository with details about these steps and any other error messages you may have received.

If you're not able to load the http URL in your phone's web browser, try using the tethering/mobile hotspot feature on your phone (beware of data usage, though), connecting your computer to that WiFi network, and restarting the packager. If you are using a VPN you may need to disable it.

iOS Simulator won't open

If you're on a Mac, there are a few errors that users sometimes see when attempting to npm run ios:

  • "non-zero exit code: 107"
  • "You may need to install Xcode" but it is already installed
  • and others

There are a few steps you may want to take to troubleshoot these kinds of errors:

  1. Make sure Xcode is installed and open it to accept the license agreement if it prompts you. You can install it from the Mac App Store.
  2. Open Xcode's Preferences, the Locations tab, and make sure that the Command Line Tools menu option is set to something. Sometimes when the CLI tools are first installed by Homebrew this option is left blank, which can prevent Apple utilities from finding the simulator. Make sure to re-run npm/yarn run ios after doing so.
  3. If that doesn't work, open the Simulator, and under the app menu select Reset Contents and Settings.... After that has finished, quit the Simulator, and re-run npm/yarn run ios.

QR Code does not scan

If you're not able to scan the QR code, make sure your phone's camera is focusing correctly, and also make sure that the contrast on the two colors in your terminal is high enough. For example, WebStorm's default themes may not have enough contrast for terminal QR codes to be scannable with the system barcode scanners that the Expo app uses.

If this causes problems for you, you may want to try changing your terminal's color theme to have more contrast, or running Create React Native App from a different terminal. You can also manually enter the URL printed by the packager script in the Expo app's search bar to load it manually.

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