I can't really find any detailed explanation on this, but how can I trigger the following callback from SwiftyStoreKit. Also, it is only necessary to call finishTransaction, if your app is downloading content from a server?

SwiftyStoreKit.completeTransactions(atomically: true) { purchases in

for purchase in purchases {

switch purchase.transaction.transactionState {

case .purchased, .restored:

if purchase.needsFinishTransaction {

// TODO: Set flags here that the user has now purchased the product

SwiftyStoreKit.finishTransaction(purchase.transaction)

}

// Unlock content

case .failed, .purchasing, .deferred:

break // do nothing

}

}

}