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'gethashespersec' and getinfo's 'hashespersec' are only for the internal, largely unused CPU miner inside bitcoind.
You must use submitted shares to calculate that.
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The 50% mark is not really a tipping point, as you can still get left behind in many potential attacks. Percentage of network power just means are you ever-more-likely to be able to double-spend while waiting with a chain of length X in the background. The attack is still very, very difficult and reliant upon probability even at 60%, 70%, etc.
Yeah, but what makes me nervous is that someone with that kind of power could lay in wait for an indefinite period of time...spending whatever it takes to remain substantially ahead of the network...waiting for the most opportune time to reveal themselves and completely undermine bitcoin. That is one of the reasons why the Satoshi Client includes hardcoded block chain checkpoints. |
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I think you should change the title of your thread from " bitcoin client is eating my bitcoins, WTF?" to bitcoin client is not confirming my transactions, WTF?
+1, the devs monitor for threads like this, and the title is definitely misleading |
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That is definitely an area in need of improvement: we are always desperately short of hosts that accept incoming connections on the network.
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blockexplorer's API can get you the balance of an address.
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The 50% mark is not really a tipping point, as you can still get left behind in many potential attacks. Percentage of network power just means are you ever-more-likely to be able to double-spend while waiting with a chain of length X in the background. The attack is still very, very difficult and reliant upon probability even at 60%, 70%, etc.
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Review the wiki, Dan Kaminsky's slides and Brian Warner's slides.
Avoid any unconditional claims like "bitcoin is anonymous", "bitcoin is untraceable" etc. which will be quickly proven silly.
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No, it's not "just theory".
By observing timing and size of network traffic bursts, one may deduce who is the sender of a bitcoin transaction, even if the network connection is encrypted. And by default, the connection is not encrypted.
This is obviously predicated on someone already observing you, as well as actively sampling the P2P network. If you find out about a crime after the fact, it is a lot more difficult to associate a transaction with a network address.
Other spends from the same wallet may compromise your identity, if you have ever posted a public bitcoin address somewhere.
In a closed ecosystem without ISP wiretaps and social engineering, bitcoin is highly private. Use of dead drops, transaction delaying, mixing services and other means help increase anonymity, but are too difficult / time consuming for most people to want to use. So we must live in the real world, where methods of discovering who is using bitcoin are already well known and used in the field today (keylogging, data sniffing and snarfing, network timing analysis, ...)
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I guess more people would try p2pool if it worked with most miners (like cgminer or poclbm).
+1 agreed, it should be compatible, not force changes to all miners |
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Seriously, if you shut off Dwolla as a means to withdraw USD from Trade Hill, you're game over.
I doubt that is a big issue. It is transfers going in the other direction -- deposits -- where scammers can cause problems. Generally, going from bitcoins -> { something else } is pretty easy. I'm surprised that mtgox, TradeHill and others have not bothered with PayPal as a withdrawal method. Paying with PayPal is certainly safe, and the exchange's account would be 100.0% fraud-free. |
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No, cpuminer does not check for hash < target.
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Orly? How about checking the code in the gpuminer_thread or findnonce.c and tell me where you see a check for hash < target or even where the target is derived from?
You claimed that cgminer would break with a different difficulty. cgminer and its ancestor, cpuminer, will push all H==0 solutions. This is not the same thing. Your income remains the same, either way. |
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Now, open up msg.c and head down to the check_hash function, specifically the return of better_hash. It looks like it is checking a hard coded 40 bits of 0's. Won't I need to change this spot too? What should I change this to based on the 10, 50, 100 scenarios?
Correct. In addition to changing EASY_TARGET, you must update check_hash. IMHO the bounty should go to the person submitting a patch that makes difficulty variable, without recompiling the source code! Well no, cause then cgminer will be broken perhaps. No, that will not break cgminer. All miners are built to handle any difficulty. You're just confused. |
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I don't think everything the press has ever written about Bitcoin needs to be on the page. I also don't think screenshots are needed.
+1, though I think this thread would largely duplicate said wiki page... |
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This is not a discussion thread.
If you do not have a "press hit" or other link to post, please post in another thread. Thank you.
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The init steps are as follows:
1. other stuff
2. init network ports
3. init database
4. print "initialized"
It sounds like your database is causing some sort of crash upon init.
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I think it's a problem of the design. As forrestv said, the whole sharechain is kept in memory, instead of a file or a db.
Yes. That is always a bit silly, because the OS will cache frequently accessed bits of files anyway. |
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After looking at that URL, my question remains unanswered. One must assume it is not available for download, which implies programmers would need to create one from scratch -- a decidedly non-trivial task that could take months to complete. Not a realistic answer, unless you are volunteering a team of programmers, or paying a bounty or something? |
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i understand that the forums are somewhat... embarrassing, at times. but it's pretty easy to fix - and would require much less hands-on moderation than you are currently committing to.
More than embarrassing. Blatantly illegal stuff creates real legal risk for the people developing bitcoin software, which may or may not matter to the people who are not taking those risks. i've mentioned the brilliance of the self-moderating system at DailyKos before; and for a burgeoning community like this one, it would perform very well. if you'd like to discuss it at length, i'd be happy to - PM me. it would really not be terribly difficult to smooth the forums out - and have the users themselves do it for you.
URL to DailyKos-like software for download? |
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Where does p2pool get its transaction details, in order to rebuild the merkle tree with a new coinbase + block header?
That is not clear to me, from either this thread or the wiki.
A better technical description would be greatly appreciated.
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