On 28/03/2014 17:59, Andreas Schildbach wrote: > Ok, why don't fix this in the spec for now, by defining a fixed expiry > time. In the EU, most products are covered by a 2 years warranty, so it > seems appropriate to pick 2.5 years (30 months) -- allowing for some > time to ship the product back and forth. Yeah I was thinking something like that on the walk home. But 2 years is a long time. Do we have enough RAM for that? Plus warranties usually result in the defective goods being replaced rather than a monetary refund, right? But adjusting the spec so there's a fixed time limit, and allowing a future version of the protocol to make it configurable, does indeed feel like the right way to go.