Do SkuDetails / skuDetailsToken expire?

[arneee]

Hi,

I could find it anywhere in the docs, but it seems like the queried SkuDetails expire after some time.

My app is a utility app which sometimes runs for hours or even days in the background. I query the SKUs at the app start to be able to show the prices. If the user starts the purchase flow immediately everything works. If he does that after a day, it doesn't anymore with the error message "5 / Invalid SKU details." The only thing different between a working and not working SkuDetails is the skuDetailsToken.

So please add to the docs if the SkuDetails expire and after what time that is.