Comment by vlovich123

You’d mine the first transaction which is a nominal value but the rest of the transaction won’t get mined until that first transaction is signed by both parties indicating acceptance. You could even break it down into an arbitrarily multi-stage process where the next stage is exponentially larger more money (i.e. transfer $100, then transfer $1000, then $1000, etc). This would make the accident “hit a button and lose a B right away” much harder to pull off. Of course, in this case I don’t know that it would help as I believe the attacked party signed approval to change the contract itself.