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Subject: Re: [bitcoin-dev] Chain width expansion
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On 10/15/19 12:20 AM, Joachim Str=C3=B6mbergson wrote:
>>> [...] to generate much longer chain with superslow timestamp increase=
(~5 blocks in 1 second) without increasing difficulty (i.e. staying at m=
in. diff.). [...]
>> In that case, it would take about 7 minutes of block time seconds for
>> the next retarget period, every 2016 blocks, and the difficulty would
>> adjust. The difficulty would adjust in that case as if 2 weeks of bloc=
ks
>> had been mined in 7 minutes. For the difficulty to remain the same the=
>> time between blocks needs to be 10 minutes.
> This calculation does not apply under time warp attack. You can fake ti=
mestamps of all blocks except for those relevant to the retarget calculat=
ion. Those are only the first and the last block in the 2016 block window=
=2E
This must be in reference to the non-overlapping difficulty calculation
and off-by-one bug?
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