`react-native-in-app-utils`

A react-native wrapper for handling in-app purchases.

Breaking Change

Due to a major breaking change in RN 0.40+, Use v5.x of this lib when installing from npm.

Notes

You need an Apple Developer account to use in-app purchases.
You have to set up your in-app purchases in iTunes Connect first. Follow this tutorial for an easy explanation.
You have to test your in-app purchases on a real device, in-app purchases will always fail on the Simulator.

Add it to your project

Make sure you have rnpm installed: npm install rnpm -g
Install with rnpm: rnpm install react-native-in-app-utils
Whenever you want to use it within React code now you just have to do: var InAppUtils = require('NativeModules').InAppUtils; or for ES6:

import { NativeModules } from 'react-native'
const { InAppUtils } = NativeModules

API

Loading products

You have to load the products first to get the correctly internationalized name and price in the correct currency.

var products = [
   'com.xyz.abc',
];
InAppUtils.loadProducts(products, (error, products) => {
   //update store here.
});

Response fields:

Field	Type	Description
identifier	string	The product identifier
price	number	The price as a number
currencySymbol	string	The currency symbol, i.e. "$" or "SEK"
currencyCode	string	The currency code, i.e. "USD" of "SEK"
priceString	string	Localised string of price, i.e. "$1,234.00"
downloadable	boolean	Whether the purchase is downloadable
description	string	Description string
title	string	Title string

Troubleshooting: If you do not get back your product(s) then there's a good chance that something in your iTunes Connect or Xcode is not properly configured. Take a look at this StackOverflow Answer to determine what might be the issue(s).

Buy product

var productIdentifier = 'com.xyz.abc';
InAppUtils.purchaseProduct(productIdentifier, (error, response) => {
   // NOTE for v3.0: User can cancel the payment which will be availble as error object here.
   if(response && response.productIdentifier) {
      AlertIOS.alert('Purchase Successful', 'Your Transaction ID is ' + response.transactionIdentifier);
      //unlock store here.
   }
});

NOTE: Call loadProducts prior to calling purchaseProduct, otherwise this will return invalid_product. If you're calling them right after each other, you will need to call purchaseProduct inside of the loadProducts callback to ensure it has had a chance to complete its call.

Response fields:

Field	Type	Description
transactionDate	number	The transaction date (ms since epoch)
transactionIdentifier	string	The transaction identifier
productIdentifier	string	The product identifier
transactionReceipt	string	The transaction receipt as a base64 encoded string

Restore payments

InAppUtils.restorePurchases((error, response)=> {
   if(error) {
      AlertIOS.alert('itunes Error', 'Could not connect to itunes store.');
   } else {
      AlertIOS.alert('Restore Successful', 'Successfully restores all your purchases.');
      
      if (response.length == 0) {
        Alert.alert('No Purchases', "We didn't find any purchases to restore.");
        return;
      }

      response.forEach( function(purchase) {
        if (purchase.productIdentifier == "com.xyz.abc") {
          // Handle purchased product.
        }
      });
   }
});

Response: An array of transactions with the following fields:

Field	Type	Description
originalTransactionDate	number	The original transaction date (ms since epoch)
originalTransactionIdentifier	string	The original transaction identifier
transactionDate	number	The transaction date (ms since epoch)
transactionIdentifier	string	The transaction identifier
productIdentifier	string	The product identifier
transactionReceipt	string	The transaction receipt as a base64 encoded string

Receipts

iTunes receipts are associated to the users iTunes account and can be retrieved without any product reference.

InAppUtils.receiptData((error, receiptData)=> {
  if(error) {
    AlertIOS.alert('itunes Error', 'Receipt not found.');
  } else {
    //send to validation server
  }
});

Response: The receipt as a base64 encoded string.

Testing

To test your in-app purchases, you have to run the app on an actual device. Using the iOS Simulator, they will always fail as the simulator cannot connect to the iTunes Store. However, you can do certain tasks like using loadProducts without the need to run on a real device.

Set up a test account ("Sandbox Tester") in iTunes Connect. See the official documentation here.
Run your app on an actual iOS device. To do so, first run the react-native server on the local network instead of localhost. Then connect your iDevice to your Mac via USB and select it from the list of available devices and simulators in the very top bar. (Next to the build and stop buttons)
Open the app and buy something with your Sandbox Tester Apple Account!

Monthly Subscriptions

You can check if the receipt is still valid using iap-receipt-validator package

import iapReceiptValidator from 'iap-receipt-validator';

const password = 'b212549818ff42ecb65aa45c'; // Shared Secret from iTunes connect
const production = false; // use sandbox or production url for validation
const validateReceipt = iapReceiptValidator(password, production);

async validate(receiptData) {
    try {
        const validationData = await validateReceipt(receiptData);

        // check if Auto-Renewable Subscription is still valid
        // validationData['latest_receipt_info'][0].expires_date > today
    } catch(err) {
        console.log(err.valid, err.error, err.message)
    }
}

This works on both react native and backend server, you should setup a cron job that run everyday to check if the receipt is still valid

Free trial period for in-app-purchase

There is nothing to set up related to this library. Instead, If you want to set up a free trial period for in-app-purchase, you have to set it up at iTunes Connect > your app > your in-app-purchase > free trial period (say 3-days or any period you can find from the pulldown menu)

The flow we know at this point seems to be (auto-renewal case):

FIRST, user have to 'purchase' no matter the free trial period is set or not.
If the app is configured to have a free trial period, THEN user can use the app in that free trial period without being charged.
When the free trial period is over, Apple's system will start to auto-renew user's purchase, therefore user can continue to use the app, but user will be charged from that point on.

kawashimaken/react-native-in-app-utils

react-native-in-app-utils