Bitcoin Forum

Bitcoin => Mining => Topic started by: hamdi on May 22, 2012, 06:45:45 PM



Title: strange stuff right now
Post by: hamdi on May 22, 2012, 06:45:45 PM
blockchain lists a block totally strange:

https://i.imgur.com/tCB8m.png


Title: Re: strange stuff right now
Post by: Gabi on May 22, 2012, 06:49:42 PM
mmhh what is the problem?


Title: Re: strange stuff right now
Post by: Stephen Gornick on May 22, 2012, 06:51:02 PM
The timestamp can be up to two hours different.  Block thus won't always be in chronological order for the timestamp.


Title: Re: strange stuff right now
Post by: ZodiacDragon84 on May 22, 2012, 06:51:36 PM
what are we missing, Oh wise one?


Title: Re: strange stuff right now
Post by: Gladamas on May 23, 2012, 02:02:44 AM
The timestamp can be up to two hours different.  Block thus won't always be in chronological order for the timestamp.

Why? (How can this be?)


Title: Re: strange stuff right now
Post by: drakahn on May 23, 2012, 02:27:24 AM
this thread pops up a lot doesn't it, always looking slightly different but always the same.


Title: Re: strange stuff right now
Post by: Stephen Gornick on May 23, 2012, 08:05:42 PM
The timestamp can be up to two hours different.  Block thus won't always be in chronological order for the timestamp.

Why? (How can this be?)

From the Bitcoin wiki:

Quote
Each block contains a Unix time timestamp. In addition to serving as a source of variation for the block hash, there are also validity checks, that make it more difficult for an adversary to manipulate the block chain.
A timestamp is accepted as valid if it is greater than the median timestamp of previous 11 blocks, and less than the network-adjusted time + 2 hours. "Network-adjusted time" is the median of the timestamps returned by all nodes connected to you.

 - http://en.bitcoin.it/wiki/Block_timestamp