react-native-unique-id

generates a guid and stores it in the async store This is supposed to identify the device / user. It creates a guid if no exists and stores it in the AsyncStorage. If a Guid exists, this will be returned

Usage

npm install react-native-unique-id --save

const uniqueId = require("react-native-unique-id");

uniqueId()
  .then(id => console.log(id))
  .catch(error => console.error(error));

// or callback style

uniqueId((error, id) => {
  if (error) return console.error(error);
  console.log(id);
});

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