Bitcoin Forum

Can someone explain to me how this is possible?
I received an anonymous payament on my blockchain wallet equal to the amount of 0.1 BTC.
The transaction has 3 confirmations, then after 40 minutes i reopened my blockchain wallet, and the same transaction was resent to another wallet,
and i didn't send anything to anyone.
The sent trasaction has yet 0 confirmations, what is happening help me please.
I can be sure that noone hacked my wallet, i just received a confirmed bitcoin transaction and then this man reversed it, but i tought that this was not possible if the transaction is confirmed..

What happened and what can i do?

Bitcoin transactions are not reversible! Once a transaction goes out of the wallet, it's done! There's no way to reverse it back to the same wallet without creating a new transaction for it! That's what exactly happened in your case. The transaction of 0.1 btc wasn't reversed, rather transferred to a new/same address.

Your case sounds real absurd! You mentioned you have blockchain wallet, is it the core bitcoin wallet or the online blockchain wallet? Most probably your account is hacked and accessed outside your knowledge! Wallets doesn't have brain. They don't send transactions unless they are instructed to do so!

See:
https://i.imgur.com/UB6vrpc.png
What does it means "Replaced by fee" and why the senders are all this adresses?

https://www.blockchain.com/btc/tx/fcf291bcc97acffd579df55321dcc999e8ca4f974ac17178df09026767a76a18
https://www.blockchain.com/btc/tx/395c3049b349a1ad991d7bd29ad5512f208acfb3375ba4a42a03a9d9caa73292

The transaction was not reversed.

The first transaction you linked to (https://www.blockchain.com/btc/tx/fcf291bcc97acffd579df55321dcc999e8ca4f974ac17178df09026767a76a18) is confirmed. 0.1 BTC was transferred to your address 14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG. However, around an hour later, the second transaction you linked to (https://www.blockchain.com/btc/tx/395c3049b349a1ad991d7bd29ad5512f208acfb3375ba4a42a03a9d9caa73292) was made which took that 0.1 BTC plus a number of other very small inputs and sent them all out to 12hXXnMgeQKsb77N89j1eQWDAMz69JHdiu.

No, you can't. You can never be sure that you haven't been hacked. Your computer could have any number of potential malware on it, or you could have typed your details in to a phishing site, or an attack could have reset your password via your email, or 100 other possibilities. If 14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG is your address, then someone has had access to your account to transfer all the funds out of it.

The blockchain wallet is one of the most secured wallet we have in the cryptosphere hence it would be really difficult for such an incident to occur.  This is news to me, I have never heard or seen a reversible transaction without the involvement of the sender. Maybe you didn't explore the transactions on your wallet very well.

This isn't true at all. Web wallets are second only to brainwallets in terms of poor security and likelihood of losing your funds. There have been countless examples of exchanges, custodial wallets, and other web services where users have lost their coins for one reason or another. You have to consider all the ways the service could lose your coins, via hacks, exit scamming, freezing your account, theft, lost keys or wallets, dishonest employees, etc., and then all the ways you could lose your coins yourself, through malware, phishing, password resets, social engineering, MITM attacks, etc. The potential vectors of attack are numerous.

If you want a secure wallet, then look in to airgapped machines, paper wallets, or hardware wallets. Even a basic software wallet like Electrum is light years ahead of a web wallet.

That's not true, there was a malware that spread through telegram a few months ago that stole funds from blockchain wallets.

Your wallet may have been compromised by a malware or may have been hacked you can't be too sure, if you have any funds in the wallet send it out to another wallet on a different device then format your device to get rid of any malware.

you say this address belongs to you, right?
did your blockchain.com wallet generate it randomly or did you acquire it from somewhere else (like an exchange, or another similar service) and then import it in your wallet? do you have its private key or just the address?

the behavior looks nothing like a hacked wallet (spend after 1 hour instead of immediately), but it looks more like what services like an exchange or a gambling site,... does.

14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG and other adresses was imported adress, so is a bit different the funds are not properly in my wallet but in impoted adress, and i thinks this was the reason why he did it.

It was an imported address, guys my wallet is not hacked trust me.

And did you import an address (14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG) or its private key? And where you have it from? Are you 100% certain nobody else has the private key for that address?

What happened to your wallet is not really a problem since the first transaction of sending bitcoin to you was at fault or done by error of the sender. So if you do not receive bitcoin then there was no problem since it is not for you. The second thing is that though bitcoin transaction is irreversible the sender can cancel the transaction as long as it is not confirmed by using  a Replace by Fee (RBF) protocol to replace the original transaction with a new one using a higher transaction fee.

Also you dont need to do something since it was not your bitcoin in the first place.

This is the first time that I will be hearing of situation like this, and I think that your account is being used to get involved in money laundering because I don’t know why your personal wallet could receive money and then get it transferred again immediately, if it was even a mistake by the sender of the bitcoin, it would have still been in your account until you do something about it, either return it or you send it, but in this your case, I can only assume that your account has been hacked already and being controlled by the scammers maybe the scammer even made a mistake of sending such transaction to your account after it has been hacked, but I think you have that sign already that you should fly away from that account since you don’t have much money on it.

Fixed that for you.




Based on the fact that you are using an online wallet, i am pretty sure that you do not know how to properly secure sensitive digital information.

You imported an 'address' ? You probably mean you imported a private key.

If you can not distinguish between an address and a private key, how can you be absolutely sure that your computer is not infected ?

Let me guess.. you are using windows and have a free AV installed?  ;)


Most probably your private key got compromised. Whether through phishing or through malware can't be said without proper investigation.
But you can be sure that you leaked it. This is not a bug or anything else. If someone stole money from your blockchain.com account, you (and only you) are at fault.

You shoud consider spending 60$ of those 1000$ for a hardware wallet. Or at least use a proper desktop wallet. You need to learn the basics first before storing such an amount on your computer again.

If you don't know how to respond to a topic then why do you have to post it here that you can not help, All you need to do is just shut up and do nothing because it is not helping. 

Well, regarding OP's problem with his transaction that is already had  been confirmed and all I can think of is his wallet might be BUG or has some error with his wallet provider, And if the wallet is an online wallet then Maybe your provider is targeting your big amount that had already been transmitted then change it to a multiple wallet so you may don't have any suspicions at all.

you can't be serious ? blockchain wallet is a web wallet
which makes it much more prone to different types of attacks than hardware or standalone wallets
if I were you OP I would check to see who could have had access to your account
you won't get your money back , sadly but at least you will find out if your machine has been compromised and avoid such incidents again
contact blockchain support for IP and device logs , change passwords to stronger ones ,  scan your pc for malware and be careful in the future
p.s. RBF transactions explanation can be found here:
https://en.bitcoin.it/wiki/Replace_by_fee

in short: if a replace-by-fee transaction is confirmed , it cannot be replaced  by another one with a higher fee
so I would exclude this scenario

We are dealing the transaction online then the chance for getting hacked is 100% possible however only for block chain system it is a challenge, so check whether you accessed your sites anywhere or mentioned your details in any fishy sites and mostly we provide our primary Gmail address as KYC for some bounties which is a chance for Spammers through links to install some software access permissions.

so does this mean blockchain.com can freely access you account and interfere with the funds inside it and use it as they please? since OP said that he didn't made any transaction to send out the
the transaction he received the only possibility now is that blockchain.com has complete control over their users accounts. if that is so, this is quite troubling.

no it doesn't mean that and no blockchain.com doesn't have that kind of access.
the address is behaving like that and i didn't know where the address was coming from. as OP later replied the address is NOT created by his account but comes from somewhere else (it is imported) but he didn't answer my other questions nor did he say how he created this address. so i have to guess at this point.
so for example if the address is created by his exchange account, and then imported that into his blockchain.com wallet, that behavior is easily explained. when he makes a deposit in his exchange account, it remains in that address for a little while then the exchange moves the funds so he sees a "withdrawal" in his blockchain.com account.

I think that it was not the person but the wallet that you are using , maybe that wallet received a message from the user stating how he accidentally sent transactions to someone else and all and since when we store our Bitcoin in a wallet we are giving them the authority to use it partially if they need to ... I think maybe this accident happened because of the wallet and they just reversed it ..

I disagree that it was the wallet because on blockchain you can't RBF a transaction and on the screenshot it was allowed on the sent transaction. It's possible that another wallet was used to make the transaction.

Also agree with mandoy there's no bug, the hacker might have accessed several wallets and accidentally used one of OP's address then corrected the mistake by making another transaction immediately.

No, they can't.

The private keys are generated in the browser - client side.
They get uploaded to their servers encrypted only. With your login and the correct password, you can access and decrypt them from everywhere (locally in your browser).

But this still doesn't mean that web wallets are pretty secure. There are a lot of attack vectors applicable to (only) web wallets. But a (honest) web wallet service provider is none of them.

I don't think that is a transaction bug mate, the transaction was already confirmed so, no double spending attack happened but i suspected that your address are already compromised or your computer have some malware and got your private key so, if you have any funds on your wallets move it to another address and change your wallet to another computer and scan your computer for viruses and malware.


no. they don't have any access to those wallets i am guessing that the address owned by OP was already compromised and the hacker was waiting to the OP send the bitcoins to that address. if only OP knew that he can use double spend attack to recover the bitcoin.