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As I understand it, at block 1920000 the blockchain was forked and there are now two blockchain strands; ETH (hard-forked) or ETC (non-hard-forked) blockchain. This is known as "the DAO hardfork".

Please, in terse language;

  • describe what was was done
  • compare the size/other useful metrics of the two blockchains (as of Sept 2016)
  • state the basic configuration changes the average user must make to switch between the two chains

Note, I'm not interested (in this question) in why this was done, just a consise explanation of what has been done what the current status is.

I have also seen this related question and answer:

Give a summary of the fork state changes in block 1920000

  • You cannot fork existing blockchains to "make another one out of it" To understand read SZABO 1998, especially paragraph 8 – user4206 Sep 6 '16 at 16:10
  • thanks, you mean this? szabo.best.vwh.net/msc.html – atomh33ls Sep 6 '16 at 16:32
  • Please can you quote the chapter in the answer and add a clear ling to the paper ? – Nicolas Massart Sep 6 '16 at 16:45
  • @NicolasMassart Alas, user4206 seems to have unregistered. – atomh33ls Sep 6 '16 at 16:47
  • @atomh33ls it was à fast one... – Nicolas Massart Sep 6 '16 at 16:49

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