Freeze + Escape Hatch

[shine2lay]

Add the ability to freeze all operation in case of emergency (should there be a global state contract that all contract in system checks?)

[mrosendin]

E.g., if no one responds after a time period, funds can be recovered.

Make sure funds cannot be stuck in an account for ever even if all else fails

[mrosendin]

We will revisit this later

[mrosendin]

@shine2lay how does this differ from the shutdown module?

[shine2lay]

shutdown is a normal procedure it expect certain things to happen in order. Technically, shutdown can have a bug in the code or some condition that might make probity stuck forever. Escape hatch is the idea that you put in a method to make sure money can be recovered even if all the other codes failed.

The example you typed up #46 (comment)_ is a one possible solution. I think we may not need it here. even if we do it'll be in asset Managers since they are the one actually holding the assets