rainbow-me/rainbow

🌈️ Rainbow

the Ethereum wallet that lives in your pocket!

📲️ Available on the iOS App Store.

🤖 Android available on the Google Play Store

💻 Browser extension available on, Chrome, Brave, Edge, FireFox, and Arc.

𝕏 Follow us on X

Setup

[!TIP] > Internal developers can also use the rainbow-me/rainbow-setup script to install all dependencies and configure the project in one step.

Prerequisites

1. Install mise: curl https://mise.run | sh. See the installation docs for shell activation (required so tool versions auto-switch when you cd into the repo).
2. From the repo root: mise install. This installs all pinned tools.
3. Enable yarn: corepack enable

Internal developers

Set up these before running yarn install, as the postinstall script reads .env and rainbow-scripts to generate build configs and run prebuild hooks.

1. Copy dotenv from rainbow-me/rainbow-env to .env in the project root.
2. Copy android/app/google-services.json from the same repo to android/app/ in this project.
3. Clone rainbow-me/rainbow-scripts into the project root (the postinstall prebuild hooks depend on it).
4. Install dependencies and run setup: yarn install && yarn setup

External contributors

1. Copy .env.example to .env and fill in your own API keys. Note that some features are currently not accessible; we are working with our Data Providers to provide open source API Keys.
   • Etherscan: https://etherscan.io/apis
   • Infura: https://infura.io/
   • ETH Gas Station: https://docs.ethgasstation.info/
   • Imgix: https://www.imgix.com/
2. Provide your own google-services.json in android/app/ from a personal Firebase project registered under the package name me.rainbow.
3. Install dependencies and run setup: yarn install && yarn setup

The iOS GoogleService-Info.plist is already in the repo and gets its API key patched by the postinstall script from GOOGLE_SERVICE_API_KEY in your .env.

iOS (macOS only)

1. Install the Xcode version pinned in .xcode-version. Recommended: use the xcodes CLI, which reads .xcode-version automatically:

   brew install xcodesorg/made/xcodes
   xcodes install
   

   Alternatively, download the pinned version from developer.apple.com/download. CI and Bitrise build against the same pin, so local parity matters.
2. Install Watchman: brew install watchman
3. Install the required bundles and Pods:

   yarn install-bundle && yarn install-pods
   

Android

1. Install JDK 17. Do not use the JDK bundled with Android Studio (it's JDK 21, which causes build failures). On macOS:

   brew install --cask zulu@17
   

2. Add to your shell profile (~/.zshrc or ~/.bashrc):

   export JAVA_HOME=/Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home
   export ANDROID_HOME=$HOME/Library/Android/sdk  # macOS
   # export ANDROID_HOME=$HOME/Android/Sdk        # Linux
   export PATH=$PATH:$ANDROID_HOME/emulator
   export PATH=$PATH:$ANDROID_HOME/platform-tools
   

   On Linux, also install system dependencies: sudo apt install libsecret-tools watchman

3. Install Android Studio (the standard setup wizard is fine).

4. Increase the IDE memory: Android Studio > Settings > Memory Settings and set the heap to at least 4096 MB. This project is large enough that the default 2048 MB will cause slow syncs and builds.

5. Set the Gradle JDK: Settings > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK and select the JAVA_HOME (Azul Zulu 17) entry. The default points to the bundled JDK 21.

6. Restart any open terminals so the new environment variables take effect.

7. Create an emulator via Android Studio > Device Manager (unless using a physical device).

8. Run the first build from the terminal to generate native headers that Android Studio needs for Gradle sync:

   cd android && ./gradlew assembleDebug && cd ..
   

9. Quit Android Studio completely, then reopen it from the terminal so Gradle sync picks up the generated headers:

   open -a "Android Studio"  # macOS
   

   Always launch Android Studio this way so it inherits your shell PATH (including node from mise). Launching from Spotlight or the Dock will cause Gradle sync to fail with "Cannot run program node".

Developing

Start Metro in one terminal:

yarn start

Then build and run:

• iOS: Open ios/Rainbow.xcworkspace in Xcode (not the .xcodeproj) and press Cmd+R, or run yarn ios from the terminal.
• Android: Open the android/ folder in Android Studio, or run yarn android from the terminal.