[bitcoin-dev] [Bitcoin-development] [BIP draft] Motivation and deployment of consensus rules changes ([soft/hard]forks)

Thomas Kerin thomas.kerin at gmail.com
Fri Jul 31 17:40:59 UTC 2015


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I really think there should be a document before a BIP number is assigned.


On 23/07/15 12:10, Jorge Timón via bitcoin-dev wrote:
> Discussions about whether to get miner's confirmation on
> uncontroversial hardforks or not, and about whether to use nHeight,
> nMedianTime or just use nTime are spreading all around. Hopefully
> getting a BIP number (even though this is still a draft) will help
> concentrating discussions about deployment of uncontroversial
> hardforks to a single place.
> Greg, can I get a BIP number for this?
>
> On Sun, Jun 21, 2015 at 12:54 PM, Tier Nolan <tier.nolan at gmail.com> wrote:
>> On Sun, Jun 21, 2015 at 11:31 AM, Jorge Timón <jtimon at jtimon.cc> wrote:
>>>
>>> You mean the timewarp fix can be coded as a softfork instead of a
>>> hardfork? How so?
>>
>>
>> The easiest would be a rule requiring that all blocks are within 1 day of
>> the median of the previous 11 blocks.  At the moment, you need to be
greater
>> than that value.  This would add a condition at the other end.
>>
>> It wouldn't be a total fix, but it would protect against the exploit.
>>
>> A stricter soft fork would be that the two blocks in question have to
have
>> the same timestamp.  This would force the off by 1 and the correct
value to
>> give the same result.
>>
>>> If that's the case, do you have a better candidate?
>>
>>
>> I think it is fine, since fixing it "right" does require a hard fork,
>> especially if it is only to show a non controversial hard fork.
>>
>>
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