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1.We are making a request to Apple's GetTransactionInfo api: request_uri: GET https://api.storekit.itunes.apple.com/inApps/v1/transactions/570xxxxxx152928 request_response_body` :{"signedTransactionInfo":"eyJh....."} 2.Parse the signedTransactionInfo content returned by the GetTransactionInfo Api JWSTransactionDecodedPayload: { "appAccountToken": "FBACxxxx376", "bundleId": "com.test.xx", "currency": "VND", "environment": "Production", "inAppOwnershipType": "PURCHASED", "originalPurchaseDate": 1700369755000, "originalTransactionId": "57xxxxxx2928", "price": -1795967296, "productId": "com.text.xx9", "purchaseDate": 1700364444000, "quantity": 1, "signedDate": 1700364444000, "storefront": "VNM", "storefrontId": "123456", "transactionId": "57xxxxxx2928", "transactionReason": "PURCHASE", "type": "Consumable" } 3. The Apple Api returned an abnormal price: -1,795,967,296. Personal speculation: The original price of the current order item [com.text.xx9] is 2,499,000 VND, and the Apple Api multiplies the price amount by 1000, resulting in a final amount of 2,499,000,000. However, due to an overflow issue in the length of the price amount, the price in the order details becomes -1,795,967,296, a negative number. Appstore api doc： GetTransactionInfo Api docGet Transaction Info | Apple Developer Documentation JWSTransactionDecodedPayload doc：JWSTransactionDecodedPayload | Apple Developer Documentation