global.js

// Inject node globals into React Native global scope.
// Required for crypto functionality for bitcoinjs-lib, web3, etc.

if (!window.btoa) {
  window.btoa = require('Base64')
}

global.Buffer = require('buffer').Buffer;
//global.Buffer.TYPED_ARRAY_SUPPORT = false;

global.process = require('process');
global.process.env.NODE_ENV = __DEV__ ? 'development' : 'production';

// When not in development mode, nullify 'console.log()' so it
// won't produce an output. Stops debug logs from persisting into
// production and helps prevent display of sensitive data
if (!__DEV__) {
    global.console.log = () => {}
}

var getRandomValues = function(byteArray) {
  var bytes = crypto.rng.randomBytes(byteArray.length);
  for (let i = 0; i < byteArray.length; i++) {
    byteArray[i] = bytes[i];
  }
};
// "But Zach, aren't you just doing the same thing twice?"
// Yes. Initializing the crypto-browserify module eventually requires
// crypto.getRandomValues to exist, so we must add it here once.
// However, crypto-browserify does not support getRandomValues, so we
// must re-add it after loading the module.
global.crypto = { getRandomValues };
global.crypto.rng = require('react-native-randombytes');
global.crypto = require('crypto');
global.crypto.getRandomValues = getRandomValues;
global.crypto.rng = require('react-native-randombytes');
crypto.rng.seedSJCL();

// Needed so that 'stream-http' chooses the right default protocol.
global.location = {
  protocol: 'file:'
};