Server Logs

These should be created and deployed like the previous 3 functions

1. To get started, go to console.google.cloud.com/functions

2. Click Create Function

3. Give your new function a meaningful name

serverLog should be the name you use here

4. Save the trigger type

5. Copy the code below and click the blue "next" button

6. Clear the default and paste the copied code into the code

7. Update the package.json file

8. Set the name of the functions entry point

the name used here should match the name used in Step 3 above

11. Deploy the function

12. Set function invocation privacy permissions

This allows any device with your endpoint URL the ability to verify purchases made via your app

1. Go to https://console.cloud.google.com/functions/list

2. Select the function you want to make public. (the function you just created)

3. Click the Permissions tab.

4. Click Add Principle

5. In the Add members field, type allUsers

6. Select the Cloud Function Invoker role from the Select a role drop-down menu.

7. Click Add.

Code

const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();


exports.purchaseInfo = functions.https.onRequest((request, response) => {
  const dbRef = admin.database().ref("purchases")
  const data = request.body;
  const queryTerms = request.query;
  const objToSave = {
    data, queryTerms, timestamp: admin.firestore.FieldValue.serverTimestamp(),
  };

  //add this objToSave the realtime database
  dbRef.push(objToSave);

  
  response.send("success").status(200);
});

package.json

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "version": "1.0.0",
  "dependencies": {
    "firebase-admin": "^9.8.0",
    "firebase-functions": "^3.14.1"
  }
}