vlees
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August 10, 2013, 06:43:07 PM |
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I hope you don't mind, but I build my transaction manually, turns out it began with a 7! I must be lucky today. 7e7a9aae3007f1cfaa853a6f304e07813bbfb0cda5faf8e5ff2a4e467dda5a87 010000000131a942717f4843237f8c11b664f96edb429553a0b4c0a92e144a7d8cf4fe51fc00000 0006b48304502200a3816ca0057a502b49f17e3a2774ecaed77dc8957868d1a34958334a8f78f8e 022100f72678a4c4979669d9a873259f30ceb2934b065c1fff2ec406cc1389b70c8f24012103562 8021c3525ddf260ffa530dc128f52d93af568882ebd1251a7108627c9ac2dffffffff0230eb7f00 000000001976a9149d184da30b40ef36a0bc68afd7351d6bfafeb72788ac40420f0000000000197 6a914afbd00a851a657f1fdb90d0a875d9b9efeadd10388ac00000000 raw = rpcConn.createrawtransaction([{"txid":"fc51fef48c7d4a142ea9c0b4a0539542db6ef964b6118c7f2343487f7142a931","vout":0}], {"1H2DfhYR3Mkkhd4zRQtUuPY2G6dfU3wrb7":0.01 , "1FKeCjp2ReCEkfjBwNtJyWY7WKq8XajSbj":0.0838328}) signed = rpcConn.signrawtransaction(raw) hashed = hashlib.sha256(hashlib.sha256(binascii.unhexlify(signed['hex'])).digest()).digest().encode('hex_codec') txhash = '' for i in range(32, -1, -1): txhash += hashed[i*2:i*2+2]
if txhash[0] == "7": print "collision found" print txhash print signed print nonce break
What is this sorcery? Are you hacking? EDIT: Anyways: my 3rd and last transaction has the two confirmations.
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BEEP BEP
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Dash77
Newbie
Offline
Activity: 14
Merit: 0
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August 10, 2013, 06:46:27 PM |
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Aw man sent 0.006 twice and I'm 0/2! Bummer.
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vlees
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August 10, 2013, 06:47:09 PM |
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Aw man sent 0.006 twice and I'm 0/2! Bummer.
The chain must hate you. Maybe more miner fee's will get you lucky.
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BEEP BEP
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dice64
Jr. Member
Offline
Activity: 34
Merit: 1
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August 10, 2013, 06:50:18 PM |
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I hope you don't mind, but I build my transaction manually, turns out it began with a 7! I must be lucky today. 7e7a9aae3007f1cfaa853a6f304e07813bbfb0cda5faf8e5ff2a4e467dda5a87 010000000131a942717f4843237f8c11b664f96edb429553a0b4c0a92e144a7d8cf4fe51fc00000 0006b48304502200a3816ca0057a502b49f17e3a2774ecaed77dc8957868d1a34958334a8f78f8e 022100f72678a4c4979669d9a873259f30ceb2934b065c1fff2ec406cc1389b70c8f24012103562 8021c3525ddf260ffa530dc128f52d93af568882ebd1251a7108627c9ac2dffffffff0230eb7f00 000000001976a9149d184da30b40ef36a0bc68afd7351d6bfafeb72788ac40420f0000000000197 6a914afbd00a851a657f1fdb90d0a875d9b9efeadd10388ac00000000 raw = rpcConn.createrawtransaction([{"txid":"fc51fef48c7d4a142ea9c0b4a0539542db6ef964b6118c7f2343487f7142a931","vout":0}], {"1H2DfhYR3Mkkhd4zRQtUuPY2G6dfU3wrb7":0.01 , "1FKeCjp2ReCEkfjBwNtJyWY7WKq8XajSbj":0.0838328}) signed = rpcConn.signrawtransaction(raw) hashed = hashlib.sha256(hashlib.sha256(binascii.unhexlify(signed['hex'])).digest()).digest().encode('hex_codec') txhash = '' for i in range(32, -1, -1): txhash += hashed[i*2:i*2+2]
if txhash[0] == "7": print "collision found" print txhash print signed print nonce break
What is this sorcery? Are you hacking? EDIT: Anyways: my 3rd and last transaction has the two confirmations. Not at all, my code is just lucky.
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Boelens
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August 10, 2013, 06:52:57 PM |
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Am I going to get my 0.2 BTC?
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narousberg
Legendary
Offline
Activity: 1753
Merit: 1007
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August 10, 2013, 06:53:16 PM |
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game over)))
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I AM NOT SELL MY BITCOINTALK ACCOUNT !!!
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vlees
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August 10, 2013, 07:03:11 PM |
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Still didn't receive my 5*0.0999BTC
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BEEP BEP
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Boelens
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August 10, 2013, 07:31:08 PM |
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Still didn't receive my 5*0.0999BTC
Have not received my 0.2BTC either.
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DiamondCardz
Legendary
Offline
Activity: 1134
Merit: 1118
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August 10, 2013, 07:54:07 PM |
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I'm almost sure he has scammed. And, like that person just shown, you can keep building rawtransactions, then signing them when you get a 7.
Painted the OP red.
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BA Computer Science, University of Oxford Dissertation was about threat modelling on distributed ledgers.
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Boelens
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August 10, 2013, 08:11:07 PM |
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I'm almost sure he has scammed. And, like that person just shown, you can keep building rawtransactions, then signing them when you get a 7.
Painted the OP red.
Seems a bit early don't you think? He's done successfull deals selling ASICminer coupons, doubt he'd scam like this. Calm it with the negative reputation.
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DiamondCardz
Legendary
Offline
Activity: 1134
Merit: 1118
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August 10, 2013, 08:16:59 PM |
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I'm almost sure he has scammed. And, like that person just shown, you can keep building rawtransactions, then signing them when you get a 7.
Painted the OP red.
Seems a bit early don't you think? He's done successfull deals selling ASICminer coupons, doubt he'd scam like this. Calm it with the negative reputation. As you wish, but I'm pretty sure he'll get some red as a form of TWC further down the line. Also, he went offline barely 1 minute before this: I hope you don't mind, but I build my transaction manually, turns out it began with a 7! I must be lucky today. 7e7a9aae3007f1cfaa853a6f304e07813bbfb0cda5faf8e5ff2a4e467dda5a87 010000000131a942717f4843237f8c11b664f96edb429553a0b4c0a92e144a7d8cf4fe51fc00000 0006b48304502200a3816ca0057a502b49f17e3a2774ecaed77dc8957868d1a34958334a8f78f8e 022100f72678a4c4979669d9a873259f30ceb2934b065c1fff2ec406cc1389b70c8f24012103562 8021c3525ddf260ffa530dc128f52d93af568882ebd1251a7108627c9ac2dffffffff0230eb7f00 000000001976a9149d184da30b40ef36a0bc68afd7351d6bfafeb72788ac40420f0000000000197 6a914afbd00a851a657f1fdb90d0a875d9b9efeadd10388ac00000000 raw = rpcConn.createrawtransaction([{"txid":"fc51fef48c7d4a142ea9c0b4a0539542db6ef964b6118c7f2343487f7142a931","vout":0}], {"1H2DfhYR3Mkkhd4zRQtUuPY2G6dfU3wrb7":0.01 , "1FKeCjp2ReCEkfjBwNtJyWY7WKq8XajSbj":0.0838328}) signed = rpcConn.signrawtransaction(raw) hashed = hashlib.sha256(hashlib.sha256(binascii.unhexlify(signed['hex'])).digest()).digest().encode('hex_codec') txhash = '' for i in range(32, -1, -1): txhash += hashed[i*2:i*2+2]
if txhash[0] == "7": print "collision found" print txhash print signed print nonce break
What is this sorcery? Are you hacking? EDIT: Anyways: my 3rd and last transaction has the two confirmations. Pretty sure he saw your bets... And finally, when taking into account that he needs to pay 5x on what you both gave him, the total amount scammed comes to just below 0.7 BTC. *Thank you, and good night.*
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BA Computer Science, University of Oxford Dissertation was about threat modelling on distributed ledgers.
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CasinoBit
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August 10, 2013, 08:45:48 PM |
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ogrgat, the first warning is that the topic is self moderated.
The second is that you don't know that people can submit selective transactions, I can keep generate transactions until I get one with the proper begging and only then broadcast it.
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vlees
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August 10, 2013, 09:53:29 PM |
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I can keep generate transactions until I get one with the proper begging and only then broadcast it.
What? How? Same hack as dice64 posted above? Can someone explain this sorcery to me?
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BEEP BEP
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BRules
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August 10, 2013, 10:25:44 PM Last edit: August 10, 2013, 10:52:47 PM by BRules |
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I can keep generate transactions until I get one with the proper begging and only then broadcast it.
What? How? Same hack as dice64 posted above? Can someone explain this sorcery to me? I don't know if you're being sarcastic, but I will assume you really don't know how the bitcoin transactions work: Have you ever tried to sign the same message using the same address twice (Original Bitcoin Client format)? You will see that the signature won't be the same. And this is exactly what happens with a transaction. Every time you sign the same transaction, you will get a different txid. Looks like the OP doesn't know about it either (or he's pretending that he doesn't know about it).
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Mooshire
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August 10, 2013, 11:01:41 PM |
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So can anyone just create custom TX id's?
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BRules
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August 10, 2013, 11:08:06 PM |
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So can anyone just create custom TX id's?
not a custom txid like "aaaaaaa...a" but you can keep signing a created raw transaction until you find a txid that fit your needs. That's why satoshi dice use secret server seeds.
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dice64
Jr. Member
Offline
Activity: 34
Merit: 1
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August 11, 2013, 12:11:08 AM |
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So can anyone just create custom TX id's?
https://en.bitcoin.it/wiki/Raw_TransactionsNot custom txids, but custom transactions, basically everytime you run signrawtransaction, a random number is used in the ecdsa signature generation, this is the signature is the first few bytes in the sigScript. Run signrawtransaction enough times and you'll end up with a signed hex transaction which will equate to a txid which begins with a 7.
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faiza1990
Sr. Member
Offline
Activity: 420
Merit: 250
★☆★777Coin★☆★
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August 11, 2013, 02:53:59 AM |
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what is minimum limit for this and sure u will send btc to winner
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ogrgat (OP)
Newbie
Offline
Activity: 28
Merit: 0
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August 11, 2013, 08:06:51 AM |
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Bets for Vlees and Boelens cancelled and returned. Reason: Higer amount betted than allowed. Pm me if any questions Any other bets are stopped now until some changes are made Thank you all for interest
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DiamondCardz
Legendary
Offline
Activity: 1134
Merit: 1118
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August 11, 2013, 10:24:11 AM |
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Example how it works.
Step 1 .... I send some Btc amount lets say .. 0.1 Btc to the exact wallet
You see, even his example amount was 0.1 BTC, HIGHER THAN ANY BET YOU BOTH MADE, and there was no mention of a maximum bet amount. Now, it is a scam, because he's getting out of paying you the owed excess. Whether he overlooked raw transactions or not, he still owes you because of what he stated in the OP. Time for some red, and it's justified now.
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BA Computer Science, University of Oxford Dissertation was about threat modelling on distributed ledgers.
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