Plasma XT: Plasma Cash with much less per-user data checking

[danrobinson]

@danrobinson

If that works, then operators can’t even prevent users from checkpointing their state (although, since they can prevent users from transacting, this isn’t a particularly significant win).

Actually, you could probably use this for a mass move from one Plasma chain to another that doesn’t require the cooperation of the first chain operator. So you could maintain the liveness of your Plasma Cash coins even if the operator goes rogue, at the on-chain cost of only around 1 bit per coin. So efficient mass checkpointing, mass exit, and moving could all be enabled by basically the same mechanism.