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Bitcoin / Bitcoin Discussion / Re: Do you think SatoshiDice is blockchain spam? Drop their TX's - Solution inside
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on: March 08, 2013, 10:47:34 AM
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As per my request, Gmaxwell wrote a patch to apply to the Bitcoin client that will drop all transactions to SatoshiDice and simply not relay or verify them. It will also drop all transactions that are less than 10,000 satoshis in value, so you might want to change that value to 1 or 2 satoshis, to only drop SD's losing bets tx's. Let's show them how the free market works and that not only miners have a say on this subject! diff --git a/src/main.cpp b/src/main.cpp index 9a06dbf..d3fba73 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -384,8 +384,16 @@ bool CTransaction::IsStandard() const BOOST_FOREACH(const CTxOut& txout, vout) { if (!::IsStandard(txout.scriptPubKey)) return false; + if (txout.scriptPubKey.size() > 6 + && txout.scriptPubKey[0] == OP_DUP + && txout.scriptPubKey[3] == 0x06 + && txout.scriptPubKey[4] == 0xf1 + && txout.scriptPubKey[5] == 0xb6) + return error("CTransaction::IsStandard : ignoring transaction with 1dice output"); if (txout.nValue == 0) - return false; + return error("CTransaction::IsStandard : ignoring transaction with 0 value output"); + if (txout.nValue <= 10000) + return error("CTransaction::IsStandard : ignoring transaction with dust output"); } return true; }
You may not be interested in the if (txout.nValue <= 10000) test, though it also gets the dice you-lost transactions and other UXTO set bloating flood. This will make the node not relay or mine these transactions. It will, of course, still accept them in blocks. Are you for real ? IS NOT SPAM its transaction, if bitcoin will be sucess 99,99% transaction will be in satoshi..
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104
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Bitcoin / Bitcoin Discussion / Re: Bitcoin under ATTACK now: What YOU can do to help!
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on: March 08, 2013, 10:35:39 AM
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"Transaction spam" is the largest issue threatening the fledgeling currency called Bitcoin. A brief synopsis of the problem: "SatoshiDICE" notifies gambling addicts of losing bets by sending them a transaction containing 1 satoshi back to their original address. A regular transaction fee is also included in this transaction. The problem is that this produces an unspendable and unprunable output. The output is unspendable because it is so small that it would cost more in fees than it would to send. It cannot be pruned because it has to stay around in fast storage to detect double spends, even though ironically it cannot be spent (developers, let me know if this description is technically accurate). The immense volume of SatoshiDICE transactions crowds out regular transactions, driving up fees for normal users. This would almost be okay if SatoshiDICE was bringing in new users to Bitcoin in proportion to its increased transaction volume. But most of these transactions come from automated bots running 24/7 spending tiny amounts of Bitcoin. Miners have a love and hate relationship with this transaction spam. They love the fees, but hate that they need to store every one of these transactions on the hard drive, FOREVER. They cannot be pruned since they are unspent outputs. But what's the real problem? The problem is that SatoshiDICE is taking advantage of the early stage of Bitcoin, at a time when transaction volume is too low to fill the blocks and bring fees up to a level that would make up for the drop in subsidy. If Bitcoin was fully mature, it will not be vulnerable to this type of transaction spam and no one would be talking about it let alone suggest patches, because fees would make the dust spam economically unviable. We do not have a mature network, and we're in the bootstrapping phase. SatoshiDICE is consuming the "startup capital" (current state of low fees, high subsidy, and lots of free space in blocks) to profit without bringing a corresponding increase in growth of Bitcoin adoption. The simple fact is that a relatively small handful of gambling addicts and bots are flooding the block chain with 70%+ of its transactions. What can you do to help? * Put pressure on SatoshiDICE to stop the transaction spam. The principals involved in SatoshiDICE are Erik Voorhees, Roger Ver, and Jon Matonis ( board member and secretary of the Bitcoin Foundation. See a conflict of interest? * Show your support in asking the MPOE exchange where the S.DICE security is located, to de-list the security until the problem is addressed. * Appeal to the S.DICE shareholders to pressure MPOE to de-list S.DICE. * Ask BlockChain.info to remove the playable direct links to SatoshiDICE from it's wallet service as a courtesy to the network * Vote Jon Matonis off the board of the Bitcoin Foundation at the next election. * Apply suggested patches and updates to your client or mining software to protect the network. With your help and the rest of the community we can work together to see Bitcoin through this fragile early phase on to see the next generation of cryptocurrency and digital payments! Thanks Are you for real ? What is difference between transfering 1 bitcoin and 1 shatoshi for netowork?, there is no difference .... If for bitcoin network, one web page is problem then better sell all your bitcoin now, if bitcon become global suces 99.99999% transaction will be done in Satoshi.
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105
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Bitcoin / Bitcoin Discussion / Re: Bitcoin decentralization myth - is it important?
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on: March 07, 2013, 04:28:04 PM
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Bitcoin is meant to be a decentralized system where anyone can do business and nobody is in control, but - it doesn't seem to be panning out like that. MTGox has the vast majority of exchange transactions. The official bitcoin price is based on their average. We also have MTGox being courted by Wall St and suddenly the bitcoin price goes nuts! For a decentralized system, that is an awful lot of influence on bitcoin from one location. While I know that anyone could set up their own exchange, it does seem to me that being centralized is benefiting bitcoin. How does this work with the whole ethos of nobody being in control of bitcoin? Is it important to the success of bitcoin or is a little bit of 'rebellion and dangerous out of control' decentralized PR just a hook to catch initial interest? BTW, This is a serious question! Every tenth new user post 'OMG Bitcoin is broken' in one or another form, I see it every day from 2011 be more orginal or mayby use serch button on this web page. Bitcoin is here to stay until last minig rig is runig, does not matter what you think .
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106
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Economy / Speculation / Re: Help me to understand current BTC fluctuation
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on: March 07, 2013, 01:46:23 PM
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I want to get a piece of knowledge currently rates are too much fluctuating what you suggest personally as i don't have inner knowledge of btc so i am not sure to hold btc or sell them?
I am a newbie to btc if anyone feels a bit free then you can guide me by PM or skype it will just take your few minutes but i will get a good knowledge and i really want to understand inner knowledge of BTC. Thanks
There is 2.5 bilion internet users world wide and only 10 milion of them can have ONE bitcoin at the time if you include lost bitcoin it even less, bitcoit is SPECIAL its not perfect but it is VERY SPECIAL nothing like this ever existed before. Bitcoin is even special from e-peen point of view, how many people can say I HAVE ONE bitcoin ? No more then 10 milions if you have 10 this number is 100k if you have 100 this number is only 10 000 ...... funny isn't it ?
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107
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Bitcoin / Bitcoin Discussion / 10 millions
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on: March 06, 2013, 09:29:12 PM
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I just realized something no more than 10 millions people can have ONE bitcoin at the moment ..... just food for thoughts.
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114
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Other / Off-topic / Can someone please hack mtgox
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on: March 05, 2013, 12:19:40 PM
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Can someone please hack mtgox and scare all 'investors' I need buy some bitcoins... 40$ ehhh I was thinking to by some when thay were 5$, I think I think too much instead DO.
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116
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Bitcoin / Mining / Re: NEW ATI 7000 architecture info
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on: September 06, 2011, 08:09:00 PM
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A bit more cores and speed?
The 7970 has 2048 SP running @ 1Ghz. that is 2.048 trillion ALU OP/s. Current miner code requires ~3670 OPs/hash. 2.048 trillion ALU OPs / 3670 = 544 MHashes/s roughly 50% more than 6970 while using less power.
Your comparison only works if the 79xx series was also VLIW4, but it's not. We don't have any numbers for comparison for MIMD, and for all we know, it might be no faster than G80+ based nVidia cards. I say this because nVidia has based their cards on MIMD/SIMD/SIMT architecture since the G80. So although the move to MIMD could make ATI cards perform better in gaming... it could also hurt mining performance. We just don't know yet. Yeh but still, if this rumors are true new 7970 have 2048 SP compare to nvidia 512 SP in 580GTX just question is how you will able access this 2048 SP....
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117
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Bitcoin / Mining / Re: NEW ATI 7000 architecture info
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on: September 06, 2011, 04:12:04 PM
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They decided to keep with VLIW vs. moving to MIMD (which was only rumored)... so performance can probably be a linear increase from the 69xx series to 78xx series.
I think the 78xx series focus appears to be gaming, as with the previous reply, the core counts and core frequencies look about the same with only the jump in memory bandwidth being the major change. This will make memory intensive tasks (like anti-aliasing at higher resolutions) much faster.
For mining, we're going to have to wait for the 79xx series with the MIMD architecture to see any radical change in the positive or the negative. There, the top end card will have 500 more stream processors and a slightly higher clock than the 6970.
There is, in this article, rumored 7970 GCN architecture with 2048 cores at 1000Mhz... + 2 slide with new architecture description.
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120
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Bitcoin / Bitcoin Discussion / Re: If an attacker gets more than 50 % of mining power
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on: July 01, 2011, 10:23:20 AM
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Personally I mostly fear the following scenario, which anyone can do at home (if he has a billion dollars lying around): 1. Short lots of bitcoins. 2. Build a huge mining cluster and completely mess up the block chain. 3. Watch prices drop as panic ensues. 4. Profit. 5. Lather, rinse, repeat.
If it happends once there will be no secont time bitcoin will be dead.
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