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January 16, 2018, 09:57:04 PM *
News: Electrum users must upgrade to 3.0.5 if they haven't already. More info.
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1  Bitcoin / Bitcoin Technical Support / Re: Status: 0/unconfirmed, not in memory pool, abandoned - 3 YEAR OLD transaction! on: Today at 08:55:43 PM
If the sender address is showing 0 Balance and no history on a blockexplorer like, then there is nothing to recover. The coins that the transaction was attempting to spend don't exist. I would guess (assuming it is actually a BTC wallet) that the transaction was either spending from an unconfirmed transaction that was then rendered invalid by a double spend, or the block that the inputs were in got orphaned or something along those lines.

Also, another possibility is that your old wallet.dat is actually an altcoin wallet... so it is possible that your TXID is actually from a completely different blockchain (like LTC or DOGE etc).
2  Bitcoin / Bitcoin Technical Support / Re: How can I get BTC out of my old Multibit wallet? on: Today at 08:23:58 PM
Theoretically, it shouldn't matter if you wait until it drops or you do it now... however, there is a possibility that Electrum might try rebroadcasting your transaction if you import your old wallet now. Which brings up to your second question... that is not an easily answered quesiton.

Not all nodes use the same mempool "expiry" criteria... so some nodes may drop it after 3 days, some after 7, some after 14 days... and some may never drop it. It is also quite possible that your MultiBit (or Electrum) wallet will continue to rebroadcast that transaction... it is also possible that ANYONE else with the raw transaction could continue to rebroadcast the transaction.

However, if you keep an eye on several block explorers like,,,, etc... when they no longer show your transaction, it is quite likely that the majority of nodes have dropped your transaction and you should be able to respend the coins.
3  Bitcoin / Bitcoin Technical Support / Re: Found an old "wallet.dat" - How do I use it? on: Today at 08:15:52 AM
You obviously didn't even get as far as the 3rd post Roll Eyes

You will have to use Bitcoin Core because no other wallet uses the wallet.dat format.

The ONLY bitcoin wallet that will work with a "wallet.dat" is Bitcoin Core...

Unfortunately, everyone uses "wallet.dat" as the default name whenever they are talking about a wallet file stored on a computer... this seems to cause a lot of confusion. So, if your old wallet file is actually called "wallet.dat", download and install Bitcoin Core... Let it sync up and then use it to open a COPY of your wallet.dat.
4  Bitcoin / Bitcoin Technical Support / Re: How can I get BTC out of my old Multibit wallet? on: Today at 08:11:31 AM
The MultiBit Devs released videos showing how to convert from MultiBit Classic and MultiBit HD to Electrum:

The MBC video is slightly outdated... so if you have MBC, you need to know that the correct option in Electrum when creating a new wallet is "Import Bitcoin Addresses or Private Keys"... (DO NOT use "standard wallet -> use public or private keys", it won't work with the individual keys you export from MBC)
5  Bitcoin / Bitcoin Technical Support / Re: Keepkey and Electrum - importing wallet on: Today at 06:51:16 AM
Sorry, I am also not very technically minded. "create it as a hardware wallet within Electrum", how do I do that? Thanks!
As I already said: "File -> New\Restore -> Standard Wallet -> Use a hardware device"... connect the hardware wallet and follow the instructions in Electrum.

It will generate what is effectively a "watching-only" wallet... so you'll be able to see all the Transactions/Addresses/Balance etc even if the hardware wallet isn't attached... but you can spend (or sign messages) ONLY if the hardware wallet is attached Wink

6  Bitcoin / Electrum / Re: ELECTRUM ISSUES - NEED HELP TO TRACK LOST BITCOIN? on: Today at 04:41:15 AM
XVG (aka Verge) is NOT BTC (aka Bitcoin). I suspect you have restored your XVG wallet to a BTC version of Electrum.

You need to make sure you are using XVG compatible version of Electrum, known as "Electrum-XVG" and available here ( most recent version seems to be 2.4.1 (NOTE: I have no idea if this has been patched for the recent security fix)
7  Bitcoin / Electrum / Re: [TUTORIAL] How to extract Bitcoin Gold from a 2fa Electrum Wallet [STEP BY STEP] on: Today at 01:38:55 AM
When i'm signing first time i get this

Looks good.... that error is "normal"... basically telling you it is only partially signed.

and second time

This means that the transaction is signed with 2 keys... it doesn't mean they're the CORRECT 2 keys. Double check the "1" addresses that were used in the redeemscript and then make sure you are using the matching private keys.

Still crashing, I guess I'm gonna hodl that for life
that must be some huge trnasaction... if you put the TXID into, how big (in bytes) is that transaction?

Also, you can also get the raw transaction by using

like this:
8  Bitcoin / MultiBit / Re: Unconfirmed Transaction (send). How to Return to Wallet? on: Today at 01:26:54 AM
Those miners are killing Bitcoin.
I know everyone likes to vilify the miners and make them the "Bad Guys" but it is other BTC users driving up the fees, specifically the ones willing to pay more than you to get their transaction confirmed. The miners just take the highest fees on offer, can't blame them really...

if someone offered you $10 to do a job, and someone else offered $100 which would you take? Tongue
9  Bitcoin / Electrum / Re: [TUTORIAL] How to extract Bitcoin Gold from a 2fa Electrum Wallet [STEP BY STEP] on: January 15, 2018, 10:08:43 AM
When I type deserialize(gettransaction("TXID_HERE"))
into the Electroum's wallet, it crashes..I updated to the latest version and it still crash
Weird... I would not have expected that... what happens if you just use: gettransaction("TXID_HERE")

Does it still crash? or do you get the raw transaction hex? if you get the hex... put it into: (it will give you the same info as derserialize(), txid, address, amount, scriptpubkey, and you can calculate the vout by counting which "output" it is, starting at 0)

Also, do I have have to download the full core wallet (150GB)??
Just spent like 3 hours on this..idk if it's worth the 0.27 bcg that I have there  Huh
Apparently not... one of the explorers has a transaction broadcast feature now!

After you create your raw transaction, try broadcasting using that. NOTE: I've not personally tested this

I get this 16: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation) (code -26)
when typing last command sendrawtransaction "HASH"
This means you have not properly signed the transaction with the minimum number of private keys as specified in the MultiSig wallet... if Electrum 2FA... then you need to sign with 2-of-3. If you see that message, it means you have only signed it with ONE of the required keys... so while it is possible you did signrawtransaction twice with different keys... one of those keys might be wrong.
10  Bitcoin / MultiBit / Re: Unconfirmed Transaction (send). How to Return to Wallet? on: January 15, 2018, 09:59:46 AM
No, wallet.dat is ONLY useful for Bitcoin Core (Bitcoin-QT)... as far as I'm aware, no other wallet will be able to read/write to wallet.dat without causing issues.

To abandon the transaction, you may need to shutdown Bitcoin Core, restart it using the "-walletbroadcast=0" option... and then you should be able to right click the transaction and select "abandon transaction" from the popup menu. Shutdown, and restart Bitcoin Core WITHOUT the walletbroadcast option
11  Bitcoin / Bitcoin Technical Support / Re: HELP.. bitcoin transfer between my wallets big problem on: January 15, 2018, 09:56:21 AM
If it helps... my (take it with a grain of salt) 2nd opinion is that LoyceV's email was pretty much "on the money" for the sort of thing you need to send to most exchange support "Heroes" Tongue

You need to keep it short, to the point and contain all the relevant info. If you make it too long, chances are they'll ignore it... if you make it too short, they won't understand what the problem is. If you don't include all the pertinent info, they'll respond with "send more info"... and then ignore your ticket for another 3 weeks.

Also, sending new tickets is, in most cases, counter-productive. It just creates extra work for support teams (which they really don't need)... and may mean that you get two different people working on the same issue who end up stepping on each others toes while trying to help.

As for the green and red transactions... your coins went in and were then likely collated into a holding address or moved to cold storage by coinbase... or used to pay someone elses withdraw request. Ignore everything that happened to them AFTER the your transaction, it is unimportant to you. The important thing is that you sent X BTC to an incorrect address at Coinbase. They should credit that much to your account.
12  Bitcoin / Alternative clients / Re: My Ledger Nano S has been hacked on: January 15, 2018, 09:46:04 AM
Probably because the apps are all different sizes... I know the "FIDO U2F" app is HUGE compared to other apps... unfortunately, there is no way to tell how big an app is, or how much space you have left on the device. It might simply be that after you uninstalled one of the smaller apps, it was only just short of free space... ie:

Total space 100
BTCApp:  30
ETHApp 2: 5
Coin3App 3: 50
Coin4App 4: 5

You tried to install the new BTCApp which is 40... so you uninstalled BTCApp... free space = 30 (can't install size 40,  then uninstalled Coin4App... free space = 35 (still can't install size 40), then uninstalled Coin3App, suddenly free space = 85... you can install 40... and still have 45 space left!

Or it could simply be that apps need to be in "contiguous" space... so you can't split an app across multiple free slots and empty space needs to be next to each other? Maybe try and remove ALL the apps and reinstall the ones you want from most important to least important.

But, I honestly have no idea how the file system is setup... I can get 4 or 5 apps... and it's a matter of seconds to uninstall and reinstall an app if I need to change one.
13  Alternate cryptocurrencies / Altcoin Discussion / Re: Extracting Bitcoin Gold from 2FA & Multisig Electrum Wallet on: January 14, 2018, 09:06:23 AM
Did you actually do points 2), 3) and 4)? If so, then you should know exactly which "1xxxx" addresses you need to get the private keys for. When you paste the redeemscript in the "Verify" section you'll see something like:

You should find that two of the three "1xxx" addresses displayed can be in found in the X1 and X2 wallets.

NOTE: you did to get the redeemscript for EACH of your "3" addresses from your Electrum 2FA that you are trying to spend the coins from... and then find the "1xxxx" addresses... and then get those private keys.

14  Bitcoin / Alternative clients / Re: Restore a Ledger Nano Bitcoin wallet on a Ledger Nano S on: January 14, 2018, 08:55:43 AM
If you have your 24 words... I'm fairly sure that you DON'T need the security card. You can simply restore your wallet to a Ledger Nano S (or Electrum) using the 24 words to gain access to your coins. You ONLY need that security card if you wish to move funds OFF your Ledger Nano by creating/sending a transaction.

If Electrum isn't working (freezing/crashing), then I'd suggest that there is possibly something wrong with your computer/OS. What OS version are you running specifically? and what version of Electrum were you trying to use to restore your seed?

15  Bitcoin / Alternative clients / Re: My Ledger Nano S has been hacked on: January 14, 2018, 05:16:11 AM
I have Bitcoin, Bitcoin Cash, Ethereum and Litecoin all installed at the same time. You should generally be able to have 4 (sometimes 5) apps installed at any one time.

The Ledger will correctly recreate the wallet whenever you reinstall an app, so there is no danger uninstalling and reinstalling apps. You won't lose any coins. If you don't have available space, you can simply uninstall an app and reinstall the app you want/need. For instance, if I needed Bitcoin Gold, I could just uninstall Ethereum, install Bitcoin Gold. If I needed Ethereum again... I could just uninstall Bitcoin Gold and reinstall Ethereum... etc etc ad naseum Tongue

I would imagine it is a bit of a nuisance if you use multiple currencies ALL the time... but I only use 3-4, so it is fine for me.
16  Alternate cryptocurrencies / Altcoin Discussion / Re: Extracting Bitcoin Gold from 2FA & Multisig Electrum Wallet on: January 14, 2018, 12:15:56 AM
hi, I got to the last step for signing the raw transaction, but now get the error message:

Invalid private key (code -5)

The 1st private key starts with 'xprv.....' and I got it from the wallet text file. I tried the 2nd priv key and got the same error code. Its a 2 of 3 multisig wallet. Its a restored wallet with disabled 2fa.

You didn't follow the process correctly. You don't sign with the "xprv"... you need to create two standard wallets using the xrpvs... and get the private keys from those wallets... the private keys should start with either a "K" or an "L"...

Does the same procedure work also for extracting Bitcoin Cash from a Multisig Electrum Wallet? I still have them sitting there since all usual procedures didn't work...
Technically yes, but you can simply use "ElectronCash" ( open your "restored/disabled" 2FA wallet in ElectronCash and you should be able to simply send the BCH out Wink

17  Bitcoin / Electrum / Re: Help please.. Lost 2-step authentication on Electrum on: January 13, 2018, 11:50:27 PM
Coinomi does not support importing MultiSig wallets... MultiSigs use multiple private keys, so you can't just import a private key and expect that it will work, you'd be missing one or more private keys! Tongue

To claim BTG from an Electrum 2FA wallet, you HAVE to use "BitcoinGold Core" and manually create the transactions... It isn't "trivial"... but at the same time, it isn't THAT hard to do if you follow the process slowly and take your time:

18  Bitcoin / MultiBit / Re: Unconfirmed Transaction (send). How to Return to Wallet? on: January 13, 2018, 11:30:19 PM
Unfortunately yes... Bitcoin fees have gone through the roof Sad  The Bitcoin ecosystem is a LOT different to 4 years ago... long gone are the days of sending transactions for 1c Undecided and are both showing 500+ sats/byte...  Seems the number of unconfirmed transactions is still around 40,000+... which is down from the 100,000+ a week or two ago... but the "size" of the mempool is relatively stable at 120-130 megabytes... seems people are trying to push very large transactions through! Undecided

Transaction Count:
Data Size:
19  Bitcoin / Alternative clients / Re: My Ledger Nano S has been hacked on: January 13, 2018, 11:14:20 PM
How do I see which version of Bitcoin App I have? When I'm opening the app I see version 1.9.13,
Version 1.9.13 is the version of the "Chrome" app (aka "Ledger Wallet Bitcoin") that you install to your browser... but it is the version of the actual Bitcoin "app" that you install to the Ledger device (via Ledger Manager) that needs to be updated.

... And if I'm opening the Ledger Manager I can see that the latest version available is 1.1.18 (again something different that the 1.1.10 you are talking about) but it doesn't tell me anything about the version which is on my device.
Yes, the latest available its 1.1.18... it has been updated a couple of times since they fixed the "Output#2" issue. Any version from 1.1.10 should fix the issue.

You don't need the Ledger Manager to check the version (and you can't actually check it using Ledger Manager)... You have to check it on the device itself. Simply connect the Ledger device, unlock it... then select the Bitcoin App:

then scroll down to "About" and select it:

And it will display the Version number:

20  Bitcoin / Electrum / Re: Victim of now-known exploitation in versions 3.0.4 and under on: January 13, 2018, 12:21:29 PM
Suppose a person had the software 2.7.12 installed. Is there any method to go back and verify it? I assume the answer is NO because the signature and verification routines always refer to the downloaded installation DMG, not the installed product in the applications direction.
Verify what exactly? That the downloaded file was legit? If so, and you still have the downloaded file... then yes, you can still verify it now.

Have a look through:

You can see all the old versions of Electrum AND their matching signature files (.asc files) for ALL the OSes/installer types.

For instance, 2.7.12 is here:  and you can see the .dmg and .dmg.asc files. Assuming you still have the .dmg that you originally downloaded, you should be able to verify that it is legit by using the .dmg.asc file and GPG.
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