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In-App Purchases
We are using RevenueCat to handle in-app purchases.
First, you need a Google Play Developer Account to setup in-app purchases.

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Setup

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Firstly, you need to see like that screen in RevenueCat.
Step 1
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Please click the link down below:
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Create a new project or select an existing project.
Step 2
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Go to the Google Play Android Developer API page and Google Play Developer Reporting API page
Step 3-1Step 3-2
Please click the Enable button both of them.
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After clicking the Enable button, go home page in Google Cloud Console.
Step 4
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Go to IAM & Admin > Service Accounts Page
  • Click the Create Service Account button.
  • Add your Service Account Name like: SMF RC Service Account.
  • Pick your first role : ‘Pub/Sub Admin’
  • Other role should be ‘Monitoring Viewer’
  • Click the Continue and Done button.
Step 5Step 6
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After clicking the Done button, you will see the screen like below.
  • Click the 3 dots button.
  • Click the Manage Keys button.
Step 7
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Click the Add Key button. Then click the Create new key button.
Step 8
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Please pick the JSON and click the Create button.
Step 9
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Save the JSON file and keep it in a safe place. We’ll use it in the next step.
Step 10
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By the way: Go to Pub/Sub Developer Notifications
Step 11
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Step 12
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  • Go to the Google Play Console section.
  • Click Users and Permissions
Step 13
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Go back to Google Cloud Console and Copy the service account mail.
Step 14
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Paste it in here and scroll down a little bit.
Step 15
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Click the Account Permissions button. Grant the following permissions:
  • View app information and download bulk reports (read-only)
  • View financial data, orders, and cancellation survey response
  • Manage orders and subscriptions
Step 16
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Turn back to the RevenueCat dashboard and drop a json file in here.
  • Write your app package name in here.
Step 18
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Pick a Google Developer Notification Topic ID.
  • Click the Connect to Google button.
Step 19
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Then you will see like this screen. Copy the Google Developer Notification Topic ID.
Step 20
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Go to the Play Console.
Step 21
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Click the Create App button if you don’t have any app.
Step 22
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Fill the form
Step 23
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Go to the Monetization section.
Step 24
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  • Paste your Developer Notification Topic ID in here.
  • Pick notification content.
Step 25
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Copy the RevenueCat Public Key and paste it in .env file.
EXPO_PUBLIC_RC_GOOGLE_KEY=goog_...
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That’s it! You have successfully completed the setup for Android.