Android	iOS

Looking for the Yoroi Extension? See here

Make sure your Node.js version matches v10.14.2. If you have nvm installed, you can just nvm use

# install rustup
curl https://sh.rustup.rs -sSf | sh

# use 1.41.0 version
rustup toolchain install 1.41.0
rustup install 1.41.0
rustup target add wasm32-unknown-unknown --toolchain 1.41.0

Make sure rustc --version outputs 1.41.0, which is the stable version (and not nightly).

Install cocoapods and download ios dependencies:

gem install cocoapods

Install rust build targets: rustup target add aarch64-apple-ios armv7-apple-ios armv7s-apple-ios x86_64-apple-ios i386-apple-ios

Install cargo-lipo for building: cargo install cargo-lipo

MacOS Big Sur changed the default path of the system C linker, which breaks cargo lipo. Some approaches to fix this are detailed here TimNN/cargo-lipo#41.

This requires a physical Android phone & USB cable

1. Download VirtualBox
2. Expose the USB to VirtualBox guide here Note: You MUST expose USB 2.0 for Android devices. Exposing 3.0 will not work
3. If your devices still doesn't appear, follow these steps Note: The format for these steps have changed over the years so be careful if you need this.

On Host (Setup Android device)

1. Run Virtual Device from Android Studio

On VM (Detect VirtualDevice from VirtualBox)

1. adb tcpip 5555
2. adb kill-server
3. adb connect 10.0.2.2:5555

On Host (allow app to connect to packaged bundle after build)

1. Open VirtualBox
2. VM Settings > Network >> Advanced > Port Forwarding
3. Enter 8081 as Host Port and Guest Port (leave everything else blank)

# install & setup android studio
follow https://facebook.github.io/react-native/docs/getting-started.html (tab Building Projects with Native Code)

1. Ask for a copy of (or create a blank version of) android/gradle.properties.local
2. Make sure your Anddroid build tools match the version in android/build.gradle (you will get an error otherwise)
3. Download the NDK from Android Studio (see here for instructions)
4. Install Rust for Android rustup target add aarch64-linux-android armv7-linux-androideabi i686-linux-android x86_64-linux-android

Make sure the rust targets for the platform you will work on (android/iOS) have been correctly installed with rustup show. Then:

1. yarn install
2. yarn setup_configs - links libraries to ios testnet build configurations
3. When building on iOS: cd ios && pod install

If these steps fail, try looking at the android CLI

1. react-native start - this will run RN packager, let it running (optional step)

2. react-native run-android --variant=devDebug --appIdSuffix=staging - for version with testnet

3. react-native run-android --variant=mainnetDebug - for version with mainnet

4. react-native run-ios --scheme=emurgo-staging --configuration=Staging.Debug - staging (testnet) configuration

5. react-native run-ios --scheme=emurgo --configuration=Debug - production configuration

To run all unit tests:

$ yarn test

You can also run single test files, e.g.:

$ jest wallet.test.js

For E2E tsting we use the detox framework.

• iOS: MacOS 10.13 (High Sierra) or higher, Xcode 10.1 or higher.
• Android: Tested on Android Studio 3.5.1. Simulator: Android >= 9, API >= 28 (but prior versions may work too).

You only need to follow the instructions listed in the Step 1 of Detox's official docs:

$ brew tap wix/brew
$ brew install applesimutils
$ npm install -g detox-cli

Important: You need to build the app not only the first time you run the tests but also anytime you modify the code.

$ yarn e2e:build-android # for ios just replace "android" by "ios"
$ yarn e2e:test-android

This will build and test a release version of the app.

Read through this page to understand debugging for React-Native

This will allow you to put breakpoints and everything else you would ever need.

1. Download & run https://github.com/jhen0409/react-native-debugger/releases
2. While app is running, open debug menu
3. Select Debug JS remotely

1. Follow Signed Android APK to generate and setup signing certificate for Android (required only before first release).
2. cd android
3. ./gradlew assembleMainRelease

Important: You may run into Could not follow symbolic link third-party/glog-0.3.5/test-driver error if you try to build Android release on Mac. This is caused by incorrect linking in react-native/npm. To fix the issue, locate path where automake is installed (default /usr/local/share) and re-link file by running command:

ln -sf /usr/local/share/automake-<version>/test-driver <path_to_repo>/third-party/glog-0.3.5/test-driver

After following the instructions for iOS and Android -- it is not required to install both, rustup show should return something like this:

rustup show
Default host: x86_64-apple-darwin
rustup home:  /Users/nijaar/.rustup

installed toolchains
--------------------

stable-x86_64-apple-darwin
1.41.0-x86_64-apple-darwin (default)

installed targets for active toolchain
--------------------------------------

aarch64-apple-ios
aarch64-linux-android
armv7-apple-ios
armv7-linux-androideabi
armv7s-apple-ios
i386-apple-ios
i686-linux-android
x86_64-apple-darwin
x86_64-apple-ios
x86_64-linux-android

active toolchain
----------------

1.41.0-x86_64-apple-darwin (default)
rustc 1.41.0 (5e1a79984 2020-01-27)

The imports should be in this order:

1. import of external libraries
2. import of our custom code
3. import of component styles
4. import of types

Example:

// @flow

// external libraries
import React from 'react'
import {compose} from 'redux'
import {connect} from 'react-redux'
import {View} from 'react-native'

// our code
import Screen from '../../components/Screen'
import AdaIcon from '../../assets/AdaIcon'
import {confirmationsToAssuranceLevel, printAda} from '../../helpers/utils'

// styles
import styles from './TxDetails.style'

// types
import type {TransactionType} from '../../types/HistoryTransaction'

• If you use component in multiple screens, it should be in UiKit folder with other UI components and imported from it.
• Each component file has own file with styles.
• Don't import multiple style files into one component.
• Keep the style's structure flat.
• If there is same component in UiKit as in react-native, use the one from UiKit.

// src/components/UiKit/index.js
// Example of export for a default component that can be imported from UI.
export {default as Button} from './Button'

import {Text, Button, Input} from '../UiKit'

// ...

import {colors} from './config'

// Wrong
// The background color can change, gray is constant name for specific color.
background: colors.GRAY
// ...

// Good
// Changing the background color doesn't require to change the name.
// We want to change values, not labels most of time.
background: colors.background
// ...