[bitcoin-dev] Bitcoin Core and hard forks

Mike Hearn hearn at vinumeris.com
Wed Jul 22 22:01:32 UTC 2015

> Until we’re able to merge blockchain forks like we’re able to merge git
> repo forks, the safest option is no fork.

Block chain forks merge in the same way as git forks all the time, that's
how the reorg algorithm works. Transactions that didn't make it into the
post-reorg chain go back into the mempool and miners attempt to reinclude
them: this is the "merge" process. If they now conflict with other
transactions they are dropped and this is "resolving merge conflicts".

However you have to want to merge with the new chain. If your software is
programmed not to do that out of some bizarre belief that throttling your
own user base is a good idea, then of course, no merge happens. Once you
stop telling your computer to do that, you can then merge (reorg) back onto
the main chain again.
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