3 ms·

Transactions have already been reversed on Bitcoin via successful hard-forks: https://bitcointalk.org/index.php?topic=823.0 https://bitcointalk.org/index.php?t

• yanmaani 5y ago
  That's not a hard fork. A hard fork makes a previously invalid transaction valid; this made a previously valid transaction invalid, e.g. a soft fork. Bitcoin has had many soft forks.