Roughing out the demo app

node_modules/nanoid/async/random.rn.js

@@ -0,0 +1,14 @@
+var random
+try {
+  random = require('expo-random')
+} catch (e) {
+  throw new Error(
+    'React-Native does not have a built-in secure random generator. ' +
+    'Install `expo-random` locally or ' +
+    'if you don’t need unpredictable IDs, you can use `nanoid/non-secure`.'
+  )
+}
+
+module.exports = function (bytes) {
+  return random.getRandomBytesAsync(bytes)
+}