Bitcoin Forum

Hi everyone,

Unfortunately, I didn’t do much research and it appears I put my bitcoin into a shady wallet, bcoiner, that doesn’t allow me easy access my private key. The wallet had no problem receiving my transaction but it has been >30 hours since I have attempted to send my bitcoins elsewhere and there’s is 0 confirmations and no option for me to do anything.

I can’t seem to find the trx i’d anywhere - perhaps someone can help. If anyone can help push this transaction through I would be happy to compensate. The wallet forced a fee of 0.0001 which I understand is quite low, but I’ve also now come accross some people complaining of the same situation with bcoiner.

Here are the details:
bcoiner wallet: 1MbPRPBYmvonGE9733DNt6d6qXusSwyKxV
receiving wallet: 1Hy5Z9aTiotFYQ3WUFj8sFtGkCnK1pTcn5
trx id: 863d8f610384de83721b3c659eb0b37a101c6b6f4768d78e61dd67333bf7edb5

Please help! Thank you!

What wallet are you using? Upon checking your bitcoin wallet address(1MbPRPBYmvonGE9733DNt6d6qXusSwyKxV)
The transaction is this one https://blockchain.info/tx/0e513e1216168f57e07da4d53c9552c74a988f98be2636202ee41ca212bcb110
And the receiving address is different address from the address you mention and the address of that transaction above..

There is no other transaction been made from this address (1MbPRPBYmvonGE9733DNt6d6qXusSwyKxV) except the above  transaction (https://blockchain.info/tx/0e513e1216168f57e07da4d53c9552c74a988f98be2636202ee41ca212bcb110).. is it your transaction?

When checking your TXID its not valid TXID i can't even check in blocktrail explorer...

That transaction simply does not exist anywhere. It isn't even on chain.so (which usually shows most of the "missing" transactions that other block explorers don't have)... :-\
As for the "bcoiner" wallet itself... It sounded "familiar"... sure enough, I found this thread from over a year ago: https://bitcointalk.org/index.php?topic=1567809.0

Like then, I'm still convinced that the wallet is a scam. No contact details, no terms of service. You should probably consider those funds pretty much lost.

Unless you created a new transaction to send your 0.11 BTC (https://blockchain.info/tx/0e513e1216168f57e07da4d53c9552c74a988f98be2636202ee41ca212bcb110) from 1MbPRPBYmvonGE9733DNt6d6qXusSwyKxV to 1DFah7EwnD5tZjtCPx3ZxsSHkxYdYMKeRK ???

Hi BitMaxz, thanks for your reply.

The wallet I was using is called Bcoiner, with the address 1MbPRPBYmvonGE9733DNt6d6qXusSwyKxV.

The transaction you are seeing is the original transfer I made from my exchange (Quadriga) into my Bcoiner wallet. That one worked no problems.

Not being able to find my trx id and it showing as not valid is exactly my problem.

Now i see that there is the transaction you posted from my original wallet going to 1DFah7EwnD5tZjtCPx3ZxsSHkxYdYMKeRK.
I don't know what wallet this is. Have my bitcoins been stolen?

Thanks again

Sounds about right - considering there is now an actual transaction to a wallet that is not mine, I can imagine the funds are gone

Are you sure you got the "official" wallet from:
Bcoiner Bitcoin Wallet
By Eric Stone

There is a legit Apple developper ID so this guy is legit.

Yep, that's the one - definitely adds to my confusion

Because there have never been any scam apps on the Apple AppStore or Google Play Store right? ::)

An Apple Developer ID simply means they paid some money... "The cost is 99 USD per membership year." Given that this one user has lost 0.11 BTC... that's USD$600+... $99 is a small price to pay :P

It has been said time and time again: The first rule of bitcoin is "If you don't have the private keys... you don't have any bitcoins"

Perhaps there is malware or such that exploits bcoiner specifically? Does their interface show you any transaction history that tells you which address you sent it to?

You also mentioned "doesn’t allow me easy access my private key", can you still get it though even if you have to jump through hoops?

I'm not sure if it's possible but if so I'd grab it, import into another wallet and attempt to send the BTC to another wallet but this time put the fee high and then use a paid accelerator to make sure they add that transaction to a pool's next found block as I see this one is still unconfirmed?

So, I did some more digging... signed up for a dummy account... and noticed there is a "Backup" option. This lets you download an encrypted wallet file... which downloads as "coinpunk.txt" ??? Further investigation shows: https://github.com/kyledrake/coinpunk

A, now defunct and no longer maintained/developed, DIY web-wallet service... so it looks like bcoiner.com is simply a rebadged version of coinpunk.

The "good" news, is that I was able to decrypt the "coinpunk.txt"... and it showed this:
I checked the private key using bitaddress.org, and the key matches the address... So maybe it IS possible that the OP can recover their coins. They'll need to be quick and try to recover them before that other transaction confirms tho!


So, maybe it seems that it is not that bcoiner.com is a scam as such, but possibly it is just full of security flaws allowing hackers to steal wallet files/passwords, get the private keys and then steal peoples coins? ???  :-\

Quick howto on how I'd go about something like would be:

1. Download and install Electrum
2. Create new wallet
3. Select Wallet -> Private Keys -> Sweep
4. Paste private key from coinpunk.txt, click Sweep and Broadcast
5. Get transaction id
6. Visit like https://pushtx.btc.com/, paste in transaction id and hope you win the race to confirmation

I'm not following - I was able to get the private key (THANK YOU), however now on electrum i have the wallet and 0 funds. The last transaction to the fraud account is still unconfirmed. What are my next steps to win the race?

Thank you all so much

Unfortunately, because that other transaction is already broadcast, you need to try and execute a "double spend"... not easy as a lot of the nodes will have the "fraud" transaction in their mempool and will likely reject your new transaction.

You can try to create a transaction using coinb.in but use a much larger fee than the 200 sats/byte the fraud transaction uses. Can't guarantee the network will accept the new transaction thought :(

So you performed the sweep? Did it say no valid inputs or something? Or did the broadcast go through? Does your History tab show you anything?

The sweep did say no valid inputs - what does this mean.

In the history i see the original bitcoins received and the unconfirmed transaction to the account that is not mine.

The sweep saying no valid inputs means there's no balance on the wallet (because of the unconfirmed transaction).

What HCP stated is true then, the mempool knows about the transaction. Your next step might be an attempt to do a replace by fee?

Read this post for help. https://bitcointalk.org/index.php?topic=1802212.0

I'm not sure which of those wallets does not require a full sync though?

Yeah, it won't let you sweep, because it considers the UTXO as already spent (by the unconfirmed transaction)... you will need to manually create the transaction on coinb.in

Go here: https://coinb.in/#newTransaction

Click "Outputs": enter the address you actually want the coins to go to.... in amount, just go for 0.11 (you're going to "sacrifice" 0.00567874 BTC as a HUGE fee to try and beat the thief!)
Click "Inputs":

TransactionID: 0e513e1216168f57e07da4d53c9552c74a988f98be2636202ee41ca212bcb110
N: 4
Script: 76a914e1e35fbcb0d414b9f560dd54e45e58d17ecd5d3688ac
Amount: 0.11567874

Click "Submit"... ignore the large fee warning...

It should generate a "hex" transaction, copy/paste that to the big textbox on the "sign" page... and enter the private key for the address from your bcoiner wallet. It should hopefully give you a "signed" raw transaction... and you can copy/paste that to the "broadcast" page and try broadcasting...


You can't use "Replace By Fee"... that only allows you to change the fee... not the destination address... in any case, the original transaction is not marked RBF, so you can't use RBF anyway :(

Hi HCP,

I followed your steps and the broadcast page says Missing Inputs. Any ideas? Thanks again.

Well it's not exactly a RBF in his example here:

Can you post the "signed" transaction hex here? use [ code ] tags and I'll try broadcasting from my node

Failing that, you'll just need to try broadcasting from various other services... refer: https://bitcointalk.org/index.php?topic=1938621.0

Here you go! Thanks!

010000000110b1bc12a21ce42e203626be988f984ac752953cd5a47de0578f1616123e510e04000 0008b4830450221009f73170288fadf34905bda19c59ee24d768bc2a0d20d428865a003e0d7bef6 da02205168a891732998aadc2cb139e1d282cbe3f225de0a8188bd63af249535bd26af0141042ad 13353a5e65b4578a0f64b4cabe3c753646bfe410b682f9bda3c1399a725c8fa3b1be5a4bc8db38a 68a5126b2356d491b87b15e73d00815a88eb8c3b16dba8ffffffff01c0d8a700000000001976a91 4ba1d1bad8ce20faf2622584536b365868235ac1e88ac00000000

DOH! I just realised that I told you the wrong transactionID... it should have been: d225ac3049d320b42af24f613cc46955b56afd0722c8600c9e1f91a5659087eb

TransactionID: d225ac3049d320b42af24f613cc46955b56afd0722c8600c9e1f91a5659087eb
N: 4
Script: 76a914e1e35fbcb0d414b9f560dd54e45e58d17ecd5d3688ac
Amount: 0.11567874

Redo the raw transaction, sign it... and again, try broadcasting it... and paste it here

Here is the new one - now it says mempool conflict

Yeah... because of the previous transaction, the network is for the most part rejecting it as a "double spend" :-\

I tried to broadcast it on my node, it gave me the "transactionID", so it didn't reject it outright... but I'm not sure you will be able to get it to broadcast. Your best bet now is to try and contact some miners and see if they will include your transaction into a block for you. I have no idea how to do that.

Maybe if the "fraud" transction doesn't confirm for a while, it might start getting dropped from various nodes, and you might be able to broadcast your new transaction. You'll just have to keep trying.

Other than that, there really isn't anything else you can do... sorry :( :-\

I don't understand this too well but I would have thought the trx id to have been the first one you suggested:
0e513e1216168f57e07da4d53c9552c74a988f98be2636202ee41ca212bcb110

the second one:d225ac3049d320b42af24f613cc46955b56afd0722c8600c9e1f91a5659087eb
was the original transfer of funds into this bcoiner wallet.

Exactly... The second TXID (d225a) that I posted is the one that actually contains the UTXO that you're trying to "spend"... the first TXID (0e513) is the transaction that the "thief" has broadcast.

That's why it originally said "missing input"... and now it says "mempool conflict"...

Gotcha, so now I need to keep trying to rebroadcast this hex encoded trx? Is a miner able to work with the hex encoded or do they need a trx id?

I know this is going to come off scammy but I'd be willing to try a few things if you gave me that private key and an address to send it to. At this point you're in a race anyway, it's going to be lost regardless so taking some faith that some random dude might help you out is a leap I know but it's hard to explain all the methods I might try in a forum post. I totally understand if you're not willing though, but figured I may as well offer it. Maybe HCP is interested too and you could try us both.

If this post is frowned upon I'll delete it, just trying to help in the race and maybe earn a small reward. I also like a challenge.

Never mind on this request. My apologies. I think your only hope now is to hope the tx fee is so low that it expires from a mempool before it gets confirmed. That or find the miners, yeah.

The TXID won't help unless they have the transaction in their mempool... you'll probably find they're more likely to need the hex encoded transaction.

If you can get a "referral code" for F2Pool, this site might help... I *think* it might be putting transactions directly into their mempool and trying to mine them: https://www.f2pool.com/pushtx

No idea how you go about getting a "referral code" tho... maybe message their support? ???

Hi guys,

I worked on this late last night trying different things - I have no idea what did it, but one of the attempts went through and 0.11 bitcoin ended up in my wallet and I paid 0.00567874 in fees. Couldn't be happier, thanks everyone!

Hey, that's great to hear! Very happy for you, learned a couple things myself in trying to help so glad we both benefited.