react-native bitcoinjs install issues

I’m trying to implement bitcoinjs-lib in react-native, but I get errors when it looks for Buffer and other crypto libraries. I have used rn-nodeify as referenced in #582 and #797 and imported the shim but it’s still complaining. My install process to include bitcoinjs-lib/bip39 is as follows:

npm install --save bitcoinjs-lib bip39 react-native-crypto npm install (at this point the post-install does rn-nodeify --install fs,dgram,process,path,console --hack) react-native start and react-native run-android for my emulator

react-native is still complaining about stream, and once I include stream it complains about buffer/safe-buffer/cipher-base and once I include any of those and rebuild it gives the infamous “Can’t find variable Buffer”

I’ve read around that others have got it to work but have yet to be able to build it myself. Any pointers in the install process?

[harunsmrkovic]

If you are experiencing issues with this library working fine in Simulator/Debug mode, but not working when preparing for release, you need to disable mangle from uglify.

No need to patch anything though, just add the following to your metro.config.js file:

module.exports = {
  transformer: {
    minifierConfig: {
      mangle: {
        keep_fnames: true
      }
    }
  }
}

🎉

[dcousens]

@wmpedersen it may seem like no one is listening, but I guarantee any information you post about the problems you’re having will help someone in the future, so please post the details 👍