Get Transaction History endpoint : https://api.storekit.itunes.apple.com/inApps/v1/history/{transactionId} , has a required must parameter "{transactionId/originalTransactionIdentifier}'.
But if One user have three(3) different purchases two(2) subscriptions and one non-consumable purchase [total three purchases] at a time. All three will have different "originalTransactionIdentifier".
Then Get Transaction History endpoint will have to call for THREE(3) times with each originalTransactionIdentifier separately? To get purchase history of one user.