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here is my concern situation:
You have a bitcoin-qt wallet with 3BTC
you send 1BTC to somebody, and the wallet also sends some BTC to a change address within itself
a malled txid repeats this exact same transaction, and is seen by the bitcoin-qt wallet
what happens:
a) your wallet shows a balance of 2BTC and an unconfirmed txid that will never complete
b) your wallet shows a balance of 1BTC because it thinks that there is 1BTC that you sent away waiting on confirmation
c) your wallet shows something else entirely because the change addresses get FUBAR'd
My biggest concern is that while these malled transactions wont cause clients/wallets to report the wrong balance for received transactions (because it never confirms the second deposit), what if it is incorrectly displaying balances after a SENT transaction is malled with a copied txid that the wallet sees in the blockchain and beleives you have asked toi send funds
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my exported transaction list DOES NOT ADD UP.
it includes the duplicate transaction of -0.2201 marked as 'Confirmed=FALSE' and a partly-confirmed mining income from an hour ago of 0.1674
please help me out here:
Wallet Status: Balance: 0.2146 BTC Unconfirmed: 0.00 BTC Immature: 0.1674 BTC
using the exported csv and adding all the transaction amounts, I get a total of 0.1363 BTC - this includes both the mining income and unconfirmed double spend.
Why does the math not add up? No matter how you add/subtract the renegade values my wallet amount isnt right
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my exported transaction list DOES NOT ADD UP. Today i sent a 0.2201BTC transfer and it was duplicated by what seems to be a semi-persistent bug since mtgox complained about the vulnerability. In order to make sure my wallet did not subtract the copied transaction info twice, I was advised to export the transaction history and sum up the totals.
the math doesnt match somehow
it includes the duplicate transaction of -0.2201 marked as 'Confirmed=FALSE' and a partly-confirmed mining income from an hour ago of 0.1674
please help me out here:
Wallet Status: Balance: 0.2146 BTC Unconfirmed: 0.00 BTC Immature: 0.1674 BTC
using the exported csv and adding all the transaction amounts, I get a total of 0.1363 BTC - this includes both the mining income and unconfirmed double spend.
Why does the math not add up? No matter how you add/subtract the renegade values my wallet amount isnt right
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eah something fishy going on.
my biggest concern that i wish i paid more attention to my balance for, is that I dont know if when the second spam txid is broadcast - does it cause my wallet balance to read lower?
Ie: if I have 3BTC and I send 1BTC, and then a spam rebroadcast goes out saying the same 1BTC transaction but never confirms, will my bitcoin-Qt wallet show 2BTC in it or will the client misread this to think that there is only 1BTC left?
imagine if it were to basically abandon coins when it creates te change address - it could be rescanned but there could be serious losses to some people who dont notice
I'm not sure what client you use, but on the reference client you can hit the "export" button on the bottom left to get a csv of your entire transaction history. You can run this on a spreadsheet just to make sure everything lines up (I did, just a few days ago, and of course it lined up) You can even go through every transaction in that list and verify them on the blockchain, though these recent unverified transactions look suspicious, once your transaction is verified by the blockchain, it is irrefutable. the one thing I hope for most in the aftermath of the fall of GOX is that people will learn better about how bitcoin works. I tell all my friends, when they ask me about bitcoin, and then they ask me how many I have. I always just say "it's not about how much bitcoin you have, it's about how much bitcoin you know" Meaning, I think the better you understand what bitcoin is, and what it means, the better you will be able to navigate our uncertain financial future. great - so my exported transaction list DOES NOT ADD UP. it includes the duplicate transaction of -0.2201 marked as 'Confirmed=FALSE' and a partly-confirmed mining income from an hour ago of 0.1674 please help me out here: Wallet Status: Balance: 0.2146 BTC Unconfirmed: 0.00 BTC Immature: 0.1674 BTC using the exported csv and adding all the transaction amounts, I get a total of 0.1363 BTC - this includes both the mining income and unconfirmed double spend. Why does the math not add up? No matter how you add/subtract the renegade values my wallet amount isnt right |
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eah something fishy going on.
my biggest concern that i wish i paid more attention to my balance for, is that I dont know if when the second spam txid is broadcast - does it cause my wallet balance to read lower?
Ie: if I have 3BTC and I send 1BTC, and then a spam rebroadcast goes out saying the same 1BTC transaction but never confirms, will my bitcoin-Qt wallet show 2BTC in it or will the client misread this to think that there is only 1BTC left?
imagine if it were to basically abandon coins when it creates te change address - it could be rescanned but there could be serious losses to some people who dont notice
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Hi Guys
Have a problem with a tx using QT
Status: 0/unconfirmed
Date: 11-Feb-14 11:36
To: 1XXXXXXXXXXXXXXXUVWQ
Debit: -41.00 BTC
Transaction fee: -0.0001 BTC
Net amount: -41.0001 BTC
Transaction ID: 44acb7e6a12e55e44c3cce5304d3ef5d98ec5e51e2188669db5fcfc126a4171f
The coins have left my wallet but have not appeared in the new address. Also the tx ID says transaction not found and the status has been unconfirmed for over an hour?
I have done a rescan of QT, but still nothing. Any help will be greatly appreciated!
Cheers
whats the sending/destination addresses? with those it would be a little easier to see whats going on |
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^I was actually trying to seriously pick match 17 when this thread started, and now i actually think that wont happen.
The monarch wont arrive till april fools I think
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I still want to circle this back to my unanswered concern:
If my Bitcoin-Qt shows red (withdrawals) for both transactions on it's main window, and both (1 uncomfirmed and 1 many-times confirmed) in its tranacttions log - does the perceived account balance reflect ONE or BOTH withdrawals?
my concern is that this could make incorrectly-updated clients to report lower-than-actual bitcoin quantities and possibly cause these bitcoins to be forgotten when the user transfers the 'visible' balance elsewhere and leave behind the amount from the unconfirmed double spend that still belongs to the left-behind address?
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Ok. I have a V2 MB. today i added 2 more H cards. Oddly, I've only seen 10 Gh/s increase. I went from 279 Gh/s to 290 Gh/s. Even if the cards were doing 25 Gh/s each I should see 300 Gh/s. One of the new cards is doing about 4 Gh/s, but others are perfroming worse now. I'm wondering if this is indicative of a Power Supply that isn't robust enough.
sounds like that could be thew case. If you assume the cards were tuned around 31GH stock then your rig would be ~340GH - A possible draw of up to 400W on 12V depending on how the cards are tuned or if pencil modded. If you assume an extra 20% precaution to the PSU, then I would say using a power supply that provides any less than 500W to the bitfury 12V may be a source of the problem. Try with a better supply, preferably with at least 550W on a single 12V rail. (The CX600M is a really solid modular system - cant recall if 1 or 2 PCI connectors though) |
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So any conclusion on what this means (in terms of security, usability of bitcoin)?
my guess is a malicious, high-volume node must be causing this to every transaction that it can pass through it - whether this means tens or thousands per second I'm not sure. The issue seems to have no impact on bitcoin, since it can only repeat the transaction under a slightly different txid, it is not capable of modifying it (such as to change the recipient). Here is a very simplified explanation: http://www.reddit.com/r/Bitcoin/comments/1xieb9/keep_calm_transaction_malleability_is_not_double/is there any way to track these sort of double-spends without having to know the originating tx or wading through the recents or block tx lists to spot double spends? |
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did my wallet deduct the send value twice, and/or will the bad transaction (which isnt being confirmed of course) be deleted? I wasnt watching my wallet balance and am not sure if it dropped by my transfer amount (0.2BTC) or by 2x that (0.4btc)
this is what i really need to know. Will the blockchain eventually force a 'reject' response or do i need to 'delete' the transaction record out of the wallet.dat? I need to make sure there isnt 0.22BTC in the bitcoin-qt wallet that isnt recorded or will be lost to the ether rather than moved to a change address |
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I had a friend send me a BTC from multibit yesterday that showed as a doublespend sent 1 second apart.
today i sent from bitcoin-qt and it seems to have created a double-spend (both txids show in the bitcoin-qt and blockchain.info)
did my wallet deduct the send value twice, and/or will the bad transaction (which isnt being confirmed of course) be deleted? I wasnt watching my wallet balance and am not sure if it dropped by my transfer amount (0.2BTC) or by 2x that (0.4btc)
and why is this happening right after/around mt.Gox crying wolf about the problem? some tinfoil-hats among us might be inclined to point fingers
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would like to see trusted members starting up financial and escrow services! (no offense meant, but understand it is difficult to justify trusting a new member with a single post to access or hold my finances)  |
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The title sums it up. myself and another user have agreed on the price, item specifics, and delivery terms for a 2013 Casascius coin that will be sent via tracked domestic xpresspost.
We have attempted to contact JohnK but with no response thus far. As a result, I thought posting a request here may be suitable.
*Looking for TRUSTED escrow providers only - preferably at least a dozen high-value escrows in the last 6 months*
fee is negotiable, looking for 0.5% since this should be a quick and clean sale with fast shipping (delivery on 2nd or 3rd day from posting)
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There is a special formula for that not just the raw HW number.
^this. IIRC its error % = HW / (HW+diffR+DiffA) x 100% most of my units run between 0.15-1.05% error rates. I would say that up to 2% is fine, but more then that means you should tune it down slightly and it will be beneficial. (ie: 2% of 204GH at 400MHz is 4.08GH lost to errors. if that can be reduced to 0.5% errors by tuning down to 393 (~200GH) or 387.5 (197GH) then you will have almost the same hashrate but a little less fan noise and electricity draw to achieve it |
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I'D like to buy one can I get directions where to buy from? We are working with others to get both the 15-chip One String Miner, as well as the 6-chip hex*fury produced. I await updates on this someone needs to compete with Bitmain. its shocking that that company came out of no-where with a developed product, and has sold from stock for months now at the best price on the market and some of the best design (could be a little more compact or a bit more power efficient, but those are little details) |
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i had seen some kind of avalon2 400g use 2 1000w psu
so, i believe avalon1 can use 2 psu
its a relatively different system. heres what you need to check/know: How does the power get from the PSU to the chips? If each module has individual power connectors that dont link to one another via the control board, you can use multiple PSUs to power the different modules. But if the power DOES to the control board, THEN the modules - using 2 power supplies will eventually (probably within minutes or hours) destroy one or both supplies (possibly causing shorts and fires) |
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added my info - just a single K16 + assembly
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75W per cable is rubbish. They can carry 320W at least with proper 18AWG wire, which most good PSUs use.
Each board has 1x 6 pin PCI-E connector, so 2 per miner.
You will be absolutely fine with this PSU.
Thank you, One quick question, I am going to pickup the seasonics on Wednesday, the manual illustrates the 6/8 pin PCIe connector Will that connector fit a PCIe 6 pin connector port ? thanks careful.. SeaSonics aint what they used to be in regards to the cabling. Even a 20 gauge wire can hold a continuous 350 watts at least. Sure, at 120V. I wouldn't recommend trying to run 30A (@12V) through a 20 gauge wire though. ^This. At 12V, you can only send (per +/GND pair): 20 AWG - maybe 60-80W. I had a cheap raidmax psu whose pci-e connection would get warm just feeding a single antminer blade (~220W over 3 lines) 18 AWG - 80-110W. Still suggestible to use 3 lines of this gauge to feed an antminer. 16 AWG - 110-150W. Ive been able to use 2 lines per blade (ie: ~110W each line) without any significant wire warmth 14 AWG - 150-220W per pair. I can use a single pair of wires to power each blade I would absolutely avoid anything thats smaller than an 18 gauge wiring |
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^what about price adjustments in the MBP store?
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