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Question: Flipping a Bitcoin more often:
Lands on Heads - 2 (4.5%)
Lands on Tails - 2 (4.5%)
Lands on Edge - 2 (4.5%)
Rolls under the sofa - 8 (18.2%)
Defies gravity and just keeps flipping - 6 (13.6%)
Gets stolen by hackers - 24 (54.5%)
Total Voters: 43

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Author Topic: Heads or Tails?  (Read 1801 times)
scintill
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September 17, 2012, 05:31:17 AM
 #21

scintill,

blockchain.info offers a "Time received" for each transaction. Any chance it gets that info from the blockchain? (But it doesn't seem like it does to me)

Blocks have a timestamp, but that time is probably taken from when blockchain.info's node(s) first saw the transaction, as they do for IP addresses they saw blocks/transactions from.

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goodlord666
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September 17, 2012, 10:56:32 AM
 #22

Yeah that's what I expected. It really does look like a transaction doesn't offer data random enough for a reliable coinflip. What a bummer, really.

Out of pure interest:
where does a block get its timestamp from?


scintill
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September 17, 2012, 04:47:07 PM
 #23

Yeah that's what I expected. It really does look like a transaction doesn't offer data random enough for a reliable coinflip. What a bummer, really.

Out of pure interest:
where does a block get its timestamp from?

According to Joel Katz in this thread, miners/pools set the timestamp.  The Satoshi client seems to require blocks broadcast to be not more than 2 hours into the future, and not earlier than the median of the last 11 blocks' timestamps.

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September 18, 2012, 01:15:46 AM
 #24

Ingenious.


SRoulette
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September 18, 2012, 08:12:15 AM
 #25

according to our game there is a 1/100 chance of it landing on its side Tongue

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