Bitcoin Forum

Hello guys,

Someone send me some bitcoin yesterday and it still 0 confirmation..
Did anybody knows what's going on with this transaction ?

Here's the link : https://blockchain.info/tx/c13cc213494ab52cb857d2ec1795d0e3d7922b15fdf964e15244cac10980debb

Thank you very much !

That's a double spend, it will never confirm.

Expanding more on what was said by another user in this thread, basically what happened with this is the same Bitcoin was spent once before (or spent twice at the same time) if I remember how double spends work within the network correctly, and because the network sees that the Bitcoin has been spent before it voids the transaction.

Basically what happened is you won't get your Bitcoin because the person who has the Bitcoin is trying to commit a sort of fraud.

I don't understand. How can double spends happen? Wasn't this solved already and it was impossible for this to happen? Or is it normal that it can happen sometimes and it is a success that the bitcoin network can identify that this is going on and automatically reject it as a double spend?
How can I learn how does this work in layman's terms? cause im not a coder.

They can't.  That's why this will never confirm.  This is an invalid transaction, because it is a FAILED attempt to double spend.  The "confirmed spend" went elsewhere, and then the sender attempted to fool the recipient into accepting this invalid unconfirmed transaction.


It is not impossible for someone to send you a fake unconfirmed transaction that will never confirm.  It is impossible for a double-spend to be confirmed.  Therefore, as long as you wait for confirmation before providing anything of value in exchange, you will be ok.


Correct.  A person can send as many transactions spending the same bitcoins as they like, but AT MOST ONLY ONE of those transactions will confirm.  Once one of them confirms, all the other attempts to spend the same output will become invalid.

Hey Araudan, that's a good example of a double spend transaction.

I'm curious where u found this? What has got ur attention on this transaction amongst millions of others?

~CfA~

Thank you for your messages ! I was afraid of your answer but happily I lost nothing :)


Hello !

With my team we have launched few days ago a new gambling site (https://www.playcoin.eu) and in the deposits I found this transaction :)

Do you allow users to play without confirmation?

If so, did the user who made that transaction played and lost?

Nop, i put minimum confirmation at 2.

Ok.

In casinos that allow users to play immediately without confirmation people were doing this, they deposit, they play, if lose they will double spend the coins, if not they take the profit.

the OP's transaction is a double spend.

here is where the coins that did confirm ended up
https://blockchain.info/address/3B1iGjFBbQxPi31DdpR5KmuAviGpQixGXM

but im assuming that multisig does not belong to the OP

Yeah I'm aware of this kind of cheat, that's why i choose a non-instant deposit but secured :)

no need to worry about that. may be some one sent you with mistake. he will to contact with you. if he know  you. and if dd not contact you then you should give it to some needy person from his side.

lol no need to worry for what,for fuck sake it's kind of cheating and scamming attempt it's need to be worried,when the sender had sent the bitcoin and trick it with double spend the bitcoin will be rejected and returned to the sender,and it's such a hole for those scumbag

No worries you still receive it just wait for the time it will confirm by block chain there sometimes problem with the delay of sending funds .

Are you sure read the post above you? or open the link that OP given?
It is double spent and already rejected by network so it will never get receive. ow can you say no worries you still receive it and ask people to just wait

Transaction is gone by now(says Transaction not found in the link)

There is always a chance of an accidental double spend, specially if the coins have been sent by a program(a software's fault or something)

So you didn't really get your BTC?
I had one strange thing with BTC transaction on blockchaing recently. I withdrawed some money from another website and sent it to my wallet. I recieved the money and can see it in my wallet but if I check the transaction, it says I have zero BTC (this was my first withdrawal).

Hmmmm????? your experienced is totally strange, sounds weird imagine you see the transaction when you receive it , but your bitcoin balance was zero.  Was that means you've been hacked by the hacker? or what was that magic? well, just take it a charge of experience dude. :)

I've had more than 50 transaction and lucky to have not received an unconfirmed transaction but I do have transaction that took 12 hours to confirm,you can manipulate a receiver from believing that bitcoin is arriving if you're unaware of this double spent thing..

This topic is out of date, don't reviving that and making a shitty post. The OP is retired from this post and what do you want?