[expo-branch] null is not an object (evaluating RNBranch.STANDARD_EVENT_ADD_TO_CART

🐛 Bug Report

Environment

This bug happens in Android

  Expo CLI 3.0.9 environment info:
    System:
      OS: macOS 10.14.6
      Shell: 5.3 - /bin/zsh
    Binaries:
      Node: 10.16.0 - ~/.nvm/versions/node/v10.16.0/bin/node
      Yarn: 1.17.3 - /usr/local/bin/yarn
      npm: 6.9.2 - ~/.nvm/versions/node/v10.16.0/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    IDEs:
      Android Studio: 3.4 AI-183.6156.11.34.5522156
      Xcode: 10.3/10G8 - /usr/bin/xcodebuild
    npmPackages:
      expo: ^34.0.1 => 34.0.4 
      react: 16.8.3 => 16.8.3 
      react-native: https://github.com/expo/react-native/archive/sdk-34.0.0.tar.gz => 0.59.8 
    npmGlobalPackages:
      expo-cli: 3.0.9

Steps to Reproduce

import * as whatever from 'expo-branch' OR import whatever from 'expo-branch' OR import { Branch } from 'expo-branch'

1. npm start
2. Scan QR code on Expo on Android app
3. See red screen of death:

Expected Behavior

It does not break.

Actual Behavior

It breaks.

Reproducible Demo

https://github.com/AryanJ-NYC/expo-sandbox

[matias91]

I’m stuck with the same problem.

I’m trying with SDK 35 and still getting that error on IOS and Android. The error happens importing as

import Branch from 'expo-branch'

and

import Branch from 'react-native-branch'

I read about the Android support here, and followed this instructions.

error: null is not an object (evaluating 'RNBranch.STANDARD_EVENT_ADD_TO_CART')

i’m missing something?

[walidvb]

Also, for those interested, I’ve ended up handling it this way:

// /my-branch.js
import Constants from 'expo-constants';

if (Constants.appOwnership !== 'standalone') {
  module.exports = {
    subscribe: console.log,
    createBranchUniversalObject: async () => ({
      showShareSheet: console.log,
    })
  }
}
else{
  module.exports = require('expo-branch')
}

and then import Branch from 'my-branch'. The above code would obviously need to mock all functions called by your code.