robdenison

I agree we need the conditions to result in an invalid transaction, not a failed one. Doesn't particularly matter to me whether this goes in an operation or the header....

> The transaction frames have two phases, doApply and doCheckValid. The appropriate place for this would be in doCheckValid. My mistake, OK, then an `Assert` operation makes a lot of...

> however, this addresses the case where a transaction is signed and then a subsequent setoptions is performed changing the thresholds of a key upwards. Couldn't this be done by...

Can you achieve this alternatively by pre-signing a transaction that preauthorizes all of the transactions in the snapshot set? If there are N transactions, and each of them has to...