Maximum Request's duration

[AuHau]

When we want to migrate our smart contracts, we need the ability to deprecate the old contract but it needs to be alive until the last Request finishes/fails/cancelles. We should hence prevent somebody from creating very long contracts which would hinder this process and hence have an upper limit for the Request's duration.

What would be a reasonable limit? 6 months? 3 months?

[AuHau]

I would like to figure out two limits - soft and hard.

Hard-limit would be the limit that would make sense from system and economic side and structure around it the internal types of the smart contract (for example scaling of proof probabilities and related counters).

Soft-limit would be "artificial" limit imposed by us in order to guarantee the upgradability aspect of the contract. We could even have the possibility of updating this limit "on the fly", but not sure if it is desirable...

[AuHau]

We have figured out these limits:

• hard limit will be based on uint32 which should gives us 138 years
• soft limit will be for start a month