Retrieve Local Receipt (encrypted) - bizz84/SwiftyStoreKit GitHub Wiki
This helper can be used to retrieve the (encrypted) local receipt data:
let receiptData = SwiftyStoreKit.localReceiptData
let receiptString = receiptData.base64EncodedString(options: [])
// Do your receipt validation here...
However, the receipt file may be missing or outdated. You may need to fetch the receipt.