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Author Topic: Why would BitFury mine/work on two blocks at same height?  (Read 627 times)
mrkent
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February 18, 2016, 10:49:53 PM
 #1

Found this when randomly looking at orphaned blocks data.



Main Chain (miner unknown): https://blockchain.info/block-index/1021537/0000000000000000081ede271149c7405207d51845ffb6973dfe97952c15e19c
Orphan 1 (BitFury): https://blockchain.info/block-index/1021538/00000000000000000486299ff5b9c903531af986d9845b497b7d290bfc0192c0
Orphan 1 (BitFury): https://blockchain.info/block-index/1021539/000000000000000008a61a2f8e084d67b75f87df91ad9af6c27d962e0f62dfd2

Why would BitFury be work on two blocks of the same height? By doing so, if two are found, one of them would certainly be orphaned. In this case, both were.

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February 19, 2016, 12:11:51 AM
 #2

It is possible that that is mis-attributed. There is no guarantee that BitFury produced those blocks, so it is possible that another miner simply produced a block that have the characteristics of a BitFury block but wasn't actually.

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February 19, 2016, 12:51:49 AM
 #3

It is possible that that is mis-attributed. There is no guarantee that BitFury produced those blocks, so it is possible that another miner simply produced a block that have the characteristics of a BitFury block but wasn't actually.

Both coinbase txs have Bitfury in data:
https://blockchain.info/tx/c9f4bbad57c2cfbbd798cc07ed63f0ba6b229b75f0ea9a5aaa1e5fcbf646a176
https://blockchain.info/tx/fd946fb1325f0c5b248d4d001d843be0cc875cd1e26ee629ed6e70fb49a6c6a1

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February 19, 2016, 12:58:54 AM
 #4

It is possible that that is mis-attributed. There is no guarantee that BitFury produced those blocks, so it is possible that another miner simply produced a block that have the characteristics of a BitFury block but wasn't actually.

Both coinbase txs have Bitfury in data:
https://blockchain.info/tx/c9f4bbad57c2cfbbd798cc07ed63f0ba6b229b75f0ea9a5aaa1e5fcbf646a176
https://blockchain.info/tx/fd946fb1325f0c5b248d4d001d843be0cc875cd1e26ee629ed6e70fb49a6c6a1
Well it can be faked. Any miner could insert that into their Coinbase. Because miners can put whatever they want there, it is not necessarily trustworthy to use that for figuring out who mined a block.

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February 19, 2016, 01:38:49 AM
Last edit: February 19, 2016, 02:00:19 AM by franky1
 #5

IF it is really is bitfury and not other people just using bitfury details.. it would be their 2+ physical locations.

EG imagine they have 2 locations, iceland and the republc of georgia

well you dont need to imagine it. as its real, they have got more than one location
here is the receiver address of one location
https://blockchain.info/address/1DrK44np3gMKuvcGeFVv9Jk67zodP52eMu

here is the other
https://blockchain.info/address/1A66YkobmtQvGbq9jt5faw6nCE8tgjGgKT

im pretty sure they dont have the time to change the receiver address reprocess the block and then hash a solution in 38 seconds. so obvious that its 2 locations(pools).

after looking at the receiving addresses of the newly minted coins.
it appears that 1DrK44np3gMKuvcGeFVv9Jk67zodP52eMu has the most hash power as its blocks pop up more often. and there must be more than 2 locations because there are more than 2 receiving addresses for minted coins.

1DrK44np3gMKuvcGeFVv9Jk67zodP52eMu (produces a block every 1-2 hours)
1FeDtFhARLxjKUPPkQqEBL78tisenc9znS (produces a block 2-3 times a day)
1A66YkobmtQvGbq9jt5faw6nCE8tgjGgKT(produces a block 1-2 times a day)

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February 19, 2016, 01:53:46 AM
 #6

they don't would mine two blocks it's a non sense.
Probably they found two solutions (both invalid!)
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February 19, 2016, 01:59:01 AM
 #7

they don't would mine two blocks it's a non sense.
Probably they found two solutions (both invalid!)
No. Miners cannot find two solutions without running two processes (i.e. two pools). Neither of the blocks were invalid, they simply were not built upon by other miners so those blocks became stale (orphaned).

franky1's answer is the most likely answer for this situation.

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February 19, 2016, 09:02:22 AM
 #8

they don't would mine two blocks it's a non sense.
Probably they found two solutions (both invalid!)
No. Miners cannot find two solutions without running two processes (i.e. two pools). Neither of the blocks were invalid, they simply were not built upon by other miners so those blocks became stale (orphaned).

franky1's answer is the most likely answer for this situation.

This is my speculation as well, but even if only one of those blocks were orphaned/staled, they just lost a full block, $10k+ for having poor communication between their own nodes.

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