WARNING: This transaction had an attempted double-spent

[mr_Tailor]

Good day,community.

First of all, I would like to thank creators of the blockchain system and team site - blockchain.info.
Now I am faced with a problem.

Problem description:

I use two wallets - blockchain.info wallet 12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr and BTC-e wallet 1B3U9dWAc1A2ao6TxnkMmphL7sGoUGjQNu for trading coins.
History of transactions prefer to look on site https://www.biteasy.com, because it shows final balance after each transaction.
For example history of my wallet - https://www.biteasy.com/blockchain/addresses/12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr

On April 21, 2016, 19:57:13, I was sent 6.8 BTC from my wallet (12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr) to my BTC-e wallet (1B3U9dWAc1A2ao6TxnkMmphL7sGoUGjQNu)
Transcaction id: fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649
https://live.blockcypher.com/btc/tx/fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649/
http://uploads.im/63pVD.png - Transaction Photo

After a couple of days transcaction id № fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649 was deleted in blockchain.
When i'm paste transcaction id in search form and press "Search", then received message "This transaction rejected by our node".

in addition, site live.blockcypher.com inform "WARNING: This transaction has been double-spent by 950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415, be extremely careful when accepting this transaction!"

After the incident, I've written to support blockchain.info (George Mandrik), and received answer, that my money back to the account from which they were sent.
It has been over 12 days - support team did not write anything efficient and money is not received any of wallets.

Questions, which I want to get answers:
1) How cand send 6.8 BTC from my wallet, if i hand't same amount (support opinion)?
2) If i send an amount exceeding the balance of my wallet, blockchain.info reports that not enough money? 
3) Does blockchain.info access to wallets?
4) I lost my 6.8 BTC ?

[altcoinhosting]

https://blockchain.info/address/12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr

On april 21, there wasn't any confirmed transaction of 6.8 BTC, and after this date, no transaction of 6.8 BTC has been made...
since transaction 950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415 is also using inputs from your own wallet, you probably double-spent your own inputs and got the first transaction cancelled

EDIT:
In short, you had inputs, created transaction https://live.blockcypher.com/btc/tx/fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649/ which was rejected by blockchain.info.
Since you used blockchain.info as a wallet, the inputs from the rejected transaction could be used again, which you did for transaction https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/.
This second transaction got confirmed, thus cancelled the first transaction

To answer your questions:
1) you need inputs and outputs... If you don't have inputs for a 6.8BTC tx, you cannot create valid outputs either
2) same answer as 1)
3) they don't have an unencrypted version of your private key, they would need your password to access your account
4) no, you just created 2 transactions with the same inputs

[Jhanzo]

950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415

who made that transaction? you? on that transaction the address 12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr sent 3.65BTC to 1L6ypVSrtx7U7UHQfD7irqHvnWiKr9mhQC.

[altcoinhosting]

950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415

who made that transaction? you? on that transaction the address 12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr sent 3.65BTC to 1L6ypVSrtx7U7UHQfD7irqHvnWiKr9mhQC.

Indeed, and in the OP he said 12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr  was his blockchain.info wallet, thus he created the double spend himself after blockchain.info rejected the first transaction on their node

[mr_Tailor]

https://blockchain.info/address/12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr

EDIT:
In short, you had inputs, created transaction https://live.blockcypher.com/btc/tx/fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649/ which was rejected by blockchain.info.
Since you used blockchain.info as a wallet, the inputs from the rejected transaction could be used again, which you did for transaction https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/.
This second transaction got confirmed, thus cancelled the first transaction

To answer your questions:
1) you need inputs and outputs... If you don't have inputs for a 6.8BTC tx, you cannot create valid outputs either
2) same answer as 1)
3) they don't have an unencrypted version of your private key, they would need your password to access your account
4) no, you just created 2 transactions with the same inputs

Perhaps you are partly right, but how to deal with these facts:
1. Let's look at transactions:
1.1. 2016-04-21 19:53:44 - 1.6001 BTC 5b241e4c4abe37424863f3075eb8e3bbcd19d7744b88bfa38c22c94513c1a240
1.2. 2016-04-21 19:57:13 - 6.8002 BTC fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649
1.3. 2016-04-23 19:24:36 - 3.6502 BTC 950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415

2.1. By 2016-04-21 19:57, I had amount >= 6.8 BTC on my wallet. http://uploads.im/63pVD.png

1) How cand send 6.8 BTC from my wallet, if i hand't same amount (support opinion)?
Simply send it like usual with higher fee around 0.001 (worth enough for 6.8btc) or you can set it more

If not, I wouldn't have created the transaction fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649.
Let's see:

Fee policy: https://i.imgur.com/02SdoYP.png
My balance: https://i.imgur.com/EmiXfhl.png
Insufficient Funds: https://i.imgur.com/BYJL6St.png

As a result, transaction was created, which does not exceed the current balance

2.2. If i created 2 transactions with the same inputs, then recipient of wallet 1L6ypVSrtx7U7UHQfD7irqHvnWiKr9mhQC should receive twice that amount. 3.65 * 2 = 7.3 BTC. But this is not true (https://blockchain.info/address/1L6ypVSrtx7U7UHQfD7irqHvnWiKr9mhQC)
2.3. IF the second transaction got confirmed (950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415) and first transaction was rejected (fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649), what about the residue.
6.8 - 3.65 = 3.15 BTC. This amount I also did't get.

[altcoinhosting]

I'm not a native english speaker, so it was kinda hard to read your two posts... So instead of answering/replying to specific questions/statements in your first two posts, i decided to just analyse what happened

You're talking about two wallets:
12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr
1B3U9dWAc1A2ao6TxnkMmphL7sGoUGjQNu

You have problems understanding what could have happened with these 3 transactions:
5b241e4c4abe37424863f3075eb8e3bbcd19d7744b88bfa38c22c94513c1a240
fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649
950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415

In order to do this, i'm going to make use of blockchain.info. All transactions that got included in a block are shown on this site. Rejected/cancelled transactions might have been removed, but this is not important because those transactions were not confirmed, they didn't make it in any block, so you could still use their inputs to create outputs (unless the inputs were used to create a double-spend). The screenshots you show might have been things you actually saw, but they don't really matter. The only thing that matters is which transactions were included in a block (confirmed)

I'm also going to use live.blockcypher.com because it sometimes keeps rejected transactions in its database for a longer time.

Transaction 1 :
https://live.blockcypher.com/btc/tx/5b241e4c4abe37424863f3075eb8e3bbcd19d7744b88bfa38c22c94513c1a240/
2 inputs, 2 outputs, confirmed

Transaction 2 :
https://live.blockcypher.com/btc/tx/fb195ed926d3c5aa364ebb76462faa3986415e14e8d53f4ca09c1159199cb649
was received 12 days ago, but NOT included in any block, because you got a double-spent message, the transaction was probably still unconfirmed, but rejected by blockchain.info's node. This means they allowed you to create a new transaction 2 days later, using the same inputs as the one used for this transaction. So they allowed you o create a double-spend, which was shown on sites like blockcypher, but maybe not on blockchain.info (because they rejected it).
This transaction had 6 inputs,
input 1 was spent 10 days ago: https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/#spentby-f98f907fbeab39791debe43d2d372124298266ce064fe631d59b8faa1b556772-0
input 2 was spent 10 days ago: https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/#spentby-c75649c3a4038af0181a02e89bc68691669b426d53ab87ab1aea03234e7a8aef-1
input 3 was spent 10 days ago: https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/#spentby-3f46635d9a6793dad438eb9a5d73f6a25b8e07b78b82133b2d18a958b70ea714-1
input 4 was spent 10 days ago: https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/#spentby-cc46866f39f81c7fd5d860d5188f66505f0373b30f0ea97ae6289ec0bf8371ee-1
input 5 was spent 10 days ago: https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/#spentby-5b241e4c4abe37424863f3075eb8e3bbcd19d7744b88bfa38c22c94513c1a240-1
input 6 is unspent: https://live.blockcypher.com/btc/tx/d76f0516e54c87c54f9563cf2003ac638b43e51b279de6e668d9ecac9ddd5999/#output-index-1

Transaction 3 : https://live.blockcypher.com/btc/tx/950b4ff5842d078a8c20a59683c316790f7437546213766aca01fea59f925415/
This is the confirmed transaction in which you double spent inputs 1-5 from your transaction that was rejected by blockchain.info

[mr_Tailor]

Thanks for clarifying

input 6 is unspent: https://live.blockcypher.com/btc/tx/d76f0516e54c87c54f9563cf2003ac638b43e51b279de6e668d9ecac9ddd5999/#output-

What will happen with unspent output (money/3.15582255 BTC)? 

[altcoinhosting]

Thanks for clarifying

input 6 is unspent: https://live.blockcypher.com/btc/tx/d76f0516e54c87c54f9563cf2003ac638b43e51b279de6e668d9ecac9ddd5999/#output-

What will happen with unspent output (money/3.15582255 BTC)?  

I hadn't looked to closely, but apparently, one of the inputs that were used to create the transaction that would have created the input for your transaction was also double-spend 2 days later:
https://live.blockcypher.com/btc/tx/a4c719d8df5f8cad33a7ea77bd30814633994c9ace9f48a8c53bdbd46f814fd3/

Pretty confusing stuff

It basically boils down to the following: if you want to know which inputs and outputs were created to/from your address, just open it up on blockchain.info (or any other block explorer). You should only panic if there are outgoing transactions that you know nothing about, because in this case you might have been the victim of a hacker, or at least somebody has access to your private key.

https://blockchain.info/address/12wvNzm2Q2g7ZbLP9weewZFN54ppJQ3QMr

Here you can see how much coins were added to your address (green), and how much coins were sent from your address (red). If there are transactions missing, it's usually because they were rejected or double spent. This also means that they weren't included in a block, so you can basically treat them as non-existant. It is possible that you were expecting incoming or outgoing transactions, but if they weren't included in a block, it's like they never happened (eventough you might have screenshots to prove otherwise ).

[Pro-g]

Hi I just had a similar issue somewhat. How would I properly analyze my transaction in https://live.blockcypher.com/btc/tx/51cb4f385e399e59f9558345d86db75bad27ed5dd2fe8655bfc1f22f4e2bfcef/

I spoke to a person a bcoiner (which is the wallet I used) and they stated after the sweep they were only able to retrieve a small portion of my transaction. Do this mean that the Bitcoin transaction is lost? Any advice will appreciated

[altcoinhosting]

Hi I just had a similar issue somewhat. How would I properly analyze my transaction in https://live.blockcypher.com/btc/tx/51cb4f385e399e59f9558345d86db75bad27ed5dd2fe8655bfc1f22f4e2bfcef/

I spoke to a person a bcoiner (which is the wallet I used) and they stated after the sweep they were only able to retrieve a small portion of my transaction. Do this mean that the Bitcoin transaction is lost? Any advice will appreciated

The input used in https://live.blockcypher.com/btc/tx/51cb4f385e399e59f9558345d86db75bad27ed5dd2fe8655bfc1f22f4e2bfcef/
was also used in https://live.blockcypher.com/btc/tx/c71c90bacd03ef9a3e9a77d7836303baade058b2cc4011ee9caca9cc9768a3ac/

the thing is, they both use the same input to create an output of~0.043BTC to address 1MpTaxEqVVbzsUpd3YnNiVVXUfuXDmK4de an ~0.002BTC to 19mfq5DtLd2z23w6SGKCn7wZFmAreuyE9x, so at first sight, it looks like you created two transactions, using the same input, creating an output to the same adresses. One of the transactions confirmed, so whoever you tried to pay should have received his/her coins.

I assume you tried to pay 1MpTaxEqVVbzsUpd3YnNiVVXUfuXDmK4de, your wallet created a change address 19mfq5DtLd2z23w6SGKCn7wZFmAreuyE9x, but the transaction got broadcasted twice. I don't think this should be something you should worry about, whoever you tried to pay should have received his/her coins, and the change should be found in your wallet, it was just a glitch that may have caused some annoyance, but no harm. If somebody, for some reason, claims he wasn't payed, or you cannot find the change in your wallet, it might be best to tell us which wallet you used, which address you were sending coins to, maybe some screenshots of the conversation,...

PS: this is just what i assume happened by looking briefly at the two transactions. I might be wrong, but at first sight it looks a minor glitch at best

[Pro-g]

Thank you for the response. The company that was to receive the Bitcoin was coince.com. Since that transfer didn't confirm using the bcoiner wallet, I ended up deposit more money to another wallet that went thought to coince no problem. I've contact them close to a week ago concerning the transaction but have received a response as of yet. Here are some screenshots from the wallet I used http://s33.postimg.org/jltrfsdjf/image.jpg

http://s33.postimg.org/xqzkhlmkr/image.jpg


Should I just wait it out? Or can I take more action?

[altcoinhosting]

Thank you for the response. The company that was to receive the Bitcoin was coince.com. Since that transfer didn't confirm using the bcoiner wallet, I ended up deposit more money to another wallet that went thought to coince no problem. I've contact them close to a week ago concerning the transaction but have received a response as of yet. Here are some screenshots from the wallet I used




Should I just wait it out? Or can I take more action?

the thing is that, altough one of the transactions contained a double spent input, and was cancelled, the other one was confirmed fine:
https://live.blockcypher.com/btc/tx/c71c90bacd03ef9a3e9a77d7836303baade058b2cc4011ee9caca9cc9768a3ac/
0.04301855 BTC to 1MpTaxEqVVbzsUpd3YnNiVVXUfuXDmK4de

If, for some reason, coince.com is looking at the wrong transaction, and says they didn't receive any coins, you should point them to the correct tx id. If all your addresses, and the rest of your story is correct, you did send the coins, they did receive them, they're just looking at the wrong transaction. Since the input of the wrong transaction was double spend, it will never confirm, and they'll never credit your account unless you point them towards the correct transaction.

[Pro-g]

Thank you! I'll contact them with this information. I really appreciate your help

[Pro-g]

Just Got a response from coince and they stated their wallet starts with a 3 not an one. Do think it's a possibly bcoiner.com was hacked? I noticed in the past few days they remove their app from the market place. Looks like the transaction went to someone other than where I send it. Looks like a newbie mistake and learning experience on my part

[altcoinhosting]

Just Got a response from coince and they stated their wallet starts with a 3 not an one. Do think it's a possibly bcoiner.com was hacked? I noticed in the past few days they remove their app from the market place. Looks like the transaction went to someone other than where I send it. Looks like a newbie mistake and learning experience on my part

Basically, what you're saying is that you used bcoiner as a wallet, and payed coince. You sent coins to an address generated by coince, but they claimed they did not receive funds.

After confronting coince with a confirmed transaction, they claim they use P2SH (adresses starting with a 3), so the deposit address you used cannot be theirs.

Can you log in to coince, and confirm their deposit adresses start with a 3?
If they do, do you, by any chance, still have screenshots or something from the original deposit adress?

What could have happened:
-you fell victim to a phising website, posing as coince, but giving you a "false" deposit adress (an address controlled by hackers)
-you fell victim to to a phising website posing as bcoiner, where you pasted the correct deposit address (starting with a 3), but since they captured your login sequence they logged in to the real bcoiner and just sent funds to themselfs
-you have one of those virusses on your pc that monitors your clipboard, and as soon as they detect a bitcoin address being copyd into the clipboard, it replaces the address with an address generated by the virus writer
-either coince or bcoiner are scamming you...
-either coince or bcoiner are hacked
-you made an error, you copy/pasted the wrong address

These are just the things i can think about... I don't know coince or bcoiner, i have no idear what they do, so i cannot say what happened exactly.

[Pro-g]

Coince is some type of investment company. Pretty reputable from what I've seen.  The bcoiner wallet is where I believe the problem was. The address that received the Bitcoin looks Like it gets various deposits. Is there a place where lost Bitcoin goes? I'm new to Bitcoin and just really grabbing the concept. The amount I seem to have lost was small but I want to limit my risk in the future by understanding how to secure my self. You've helped me out a lot. I hate (like anyone else) being stolen from so I'll use a wallet I keep on my desktop. I just wish it was a way to identify who owns that particular address.