/// <summary>
/// If you use the Google Play Billing Library version 2.0 or newer, you must acknowledge all purchases within three days.
/// </summary>
/// <param name="purchase"></param>
/// <returns></returns>
private async Task <bool> NotifyFullFillmentAsync(Purchase purchase)
{
if (!purchase.IsAcknowledged)
{
if (BillingClient == null || !BillingClient.IsReady)
{
await ConnectAsync();
}
_tcsAcknowledge = new TaskCompletionSource <bool>();
AcknowledgePurchaseParams acknowledgePurchaseParams =
AcknowledgePurchaseParams.NewBuilder()
.SetPurchaseToken(purchase.PurchaseToken)
.Build();
BillingClient.AcknowledgePurchase(acknowledgePurchaseParams, this);
return(await _tcsAcknowledge?.Task);
}
return(true);
}
