This app has been configured with the following steps:

1. Add the following postinstall script:

yarn rn-nodeify --install url,events,https,http,util,stream,crypto,vm,buffer --hack --yarn

2. yarn add -D rn-nodeify
3. Uncomment require('crypto') on shim.js
4. react-native link react-native-randombytes
5. Create file rn-cli.config.js

module.exports = {
  resolver: {
    extraNodeModules: require("node-libs-react-native"),
  },
};

7. Add import "./shim"; to the top of index.js
8. yarn add stellar-sdk