PurchaseResult возвращал мои покупки с подтверждением как ложное. С помощью следующего кода удалось решить проблему.
for (Purchase purchase: purchasesResult.getPurchasesList()) {
AcknowledgePurchaseParams acknowledgePurchaseParams =
AcknowledgePurchaseParams.newBuilder()
.setPurchaseToken(purchase.getPurchaseToken())
.build();
acknowledgePurchaseParams.getDeveloperPayload();
AcknowledgePurchaseResponseListener acknowledgePurchaseResponseListener = new AcknowledgePurchaseResponseListener() {
@Override
public void onAcknowledgePurchaseResponse(BillingResult billingResult) {
BillingResult billingResult1 = billingResult;
}
};
mBillingClient.acknowledgePurchase(acknowledgePurchaseParams, acknowledgePurchaseResponseListener);
}