Internal purchases in the android application

Question

The application already includes purchases of internal currency through google pay, but I can buy a certain amount of currency only 1 time, the next time the payment dialog does not start. Why is this happening ? maybe I need to configure something in the play console

Answer 1

It's because you have to consume your purchase, as such:

override fun onPurchasesUpdated(result: BillingResult, purchases: List<Purchase>?) {
    purchases?.forEach { consumePurchase(it) }
}

private fun consumePurchase(purchase: Purchase) {
    val consumeParams = ConsumeParams
        .newBuilder()
        .setPurchaseToken(purchase.purchaseToken)
        .build()

    billingClient.consumeAsync(consumeParams) { result, _ ->
        if (result.responseCode == OK) {

        }
    }
}

This signals to the Play Store that your app has received the update and processed it in it's backend, so it's ready for a second purchase. You can still do this by calling billingClient.queryPurchaseHistory(INAPP).