Backend payments

Many developers add an extra step of security and only confirm the in-app purchase after verifying the transaction on the developers' backend. This verification, made with a unique public key, is a crosscheck between the developer backend and the App Store servers.

As is the case for other app stores, you must add Catappult public key into your backend to validate the transactions.

Please go to your Catappult’s backoffice and find your app public key by following the next steps:

1- Login

Login to your Catappult account here.

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2- Draft Status

Should your app be in Draft status, click on your app, under “Manage Apps” > “Draft” click on "Get my Public Key", copy the public key and save it from your clipboard.

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3- Pending Approval or Approved status

Should your app be in Pending Approval status or Approved status, click on the app view under “Manage Apps”> “Pending Approval” or “Approved” and scroll down to the Monetization panel. Click on the "Get my keys” button.

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4- API Key

Copy the public key and save it from your clipboard

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That’s it! You now have your unique public key that you must add to your backend to validate in-app billing transactions.

More info here.