Hey Jacob!
> Take the specific and common case of non-upgraded wallet software. Suppose a
> HF happens, and becomes the network used by 90% of users. Will old wallets
> still default to the old nForkId (10% legacy chain)? If so, I'd expect a lot
> of accidental mis-sends on that chain.
Good morning Robert,
What you describe is precisely one possible result of a 51% attack.
At below the 50% threshold, miners outside the cartel will on average outrace
miners inside the cartel, so fullnodes which do not follow cartel rules will
reject them as per Nakamoto Consensus. At some
What you describe is an example of a majority attack ("51% attack"). No
technical mechanism in Bitcoin prevents this. However in practice, miners
are not incentivized to perform this attack as it would destroy confidence
in Bitcoin, and would ultimately impact their revenues.
-Marc
On Mon, Nov
