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i had knew that the old nodes will reject the new blocks.how about the new nodes treating the old blocks? i got the definition of the hard fork in the Hard Fork.but it didn't explain how did the new nodes treat the old blocks.

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It depends on the exact rule changes.

  • so it is uncertainly? – mktake Feb 7 '17 at 6:45
  • It is very certain, but it depends on the new rules. You could have a hardforking change in which the answer is yes, or one where the answer is no. – Pieter Wuille Feb 7 '17 at 7:25
  • If you want a more detailed answer, you should specify which cryptocurrency, and which proposed or deployed hard forking change you're referring it. – Pieter Wuille Feb 8 '17 at 3:57
  • i am sorry. i means bitcoin.i searched about the bitcoin would hard fork because the segwit and BU.would this hard fork made the old blocks(or old bitcoins in my wallet) lose value? – mktake Feb 9 '17 at 4:49

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