Was Ethereum Hacked by F2Pool?

A distracting story about my local supermarket

Difficult work

The difficulty adjustment

  • the number of dice that had to be thrown to find the previous block,
  • plus an adjustment which might increase or decrease the number of dice by one, and
  • the number of dice is reduced for every nine seconds that pass without finding a block.

So what’s the problem?

  • start looking for the third block by throwing 18 dice again, or
  • look for a replacement for the second block by throwing 18 dice, and lie about the time at which your search is conducted by claiming that it is eight seconds after the first block was found

What’s the vigorish?


Is this a hack?

What are the implications?

Cheap cheese

About the author



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Keir Finlow-Bates

Keir Finlow-Bates

CEO and co-founder of Chainfrog Oy, a Finnish startup researching and developing advanced blockchain technologies.