Topic: Trying to recover old wallet (Read 519 times)

1. Build a valid 80 byte header (the mining software would typically have done this for you).

2. Calculate the SHA-256(SHA256(header)) hash.
https://en.wikipedia.org/wiki/SHA-2

3. Check to see if the result is less than the current target value.

4. If it is not, increment the 4 byte nonce and return to step 2

5. If it is, broadcast the block to all connected peers, and return to step 1


I believe the difficulty was only "roughly 25" for 9 days back in 2009.

If I've got my values correct, it was:

• 19 from June 23, 2010 through July 5, 2010
• 24 from July 5, 2010 through July 14, 2010
• Above 45 ever since July 14, 2010

So, if you are confident that the difficulty was "roughly 25", then you now know that the exact window of time during which you would have been mining was between July 5 and July 14 of 2010.

By October 2010 GPU mining was becoming popular, and CPU mining quickly became useless.

If you only had 1.1 mh/s then you must have had a pretty weak CPU.  I think a Pentium Dual-Core CPU which was common at the time had a CPU hashing power of more than 2.2 mh/s

At a difficulty of 24, and a hash rate of 1.1 mh/s, you'd solve an average of 1 block for every 26 hours of continuous hashing (or a 3.85% chance of successfully finding a block in any given hour of hashing).

In 10 hours of hashing, you'd have less than a 50% chance of getting lucky enough to have solved a block.

Anyoen know the specifics to the formula used for finding the block rewards?  The hash rate was roughly 1.1 mhs and the difficulty back then was roughly 25.  The block reward was 50 back then.  I'm trying to figure out how far it would've gotten in ten hours of running, roughly. Perhaps it didn't even find a block, it was solo mining not pool.

I've tried using google and everything is aimed at the idea of USD profits and pool mining rather than what I'm doing.

If you mined in solo mode, then when at least 1 block is found, you should have 50 bitcoins in your wallet.

I know.  I'll take it into consideration if the amount in there is worth pursuing.  I did look up the hash speed from the archives, next I have to figure out the earnings, I've seen charts that show the network difficulty back then.  Kind of ironic, if I had known a way to look it up before all of this I would've done it that way, then investigated what would be involved in recovering the wallet based on that information.  Other complications, I don't know that the wallet isn't over written, and or that the oxide on the platters hasn't degraded and flaked away over the years.  So, even if I sent it into a forensics lab that had a clean room and could perform various recovery services, I don't know definitively that they could recover it.  Thank you for the suggestion though.

Thank you HCP and others that have helped on this.

A lingering question in my mind through all of this. What wallets were there back then?  I can say I used what the mining software came with   The changelogs only go back so far.

Other question.  Is there an archive of CPU hash rates somewhere that I can look at?  I'm still curious how much BTC it mined.  I've only found stuff on GPUs.

Ahhhh I see where your confusion has come from... one of my posts to another user regarding attempting a password recovery on a blockchain.info web wallet.

That's not misinformation, it is just you're reading solutions to different problems/issues and thinking that they apply to you.

And yes, it can be confusing for newbies seeing "blockchain.info/.com" and thinking that it IS the blockchain, as opposed to a commercial company trying to look more important than they are... It is not an accident that this company deliberately chose this domain name.  


I'm not sure where you got the idea that ALL wallets use wordlists? Some do (Electrum and Mycelium for instance) and some don't (Bitcoin Core). Given you believe that you were using Bitcoin-Qt/Bitcoin Core, then this method does not apply to your situation.

Also, given that the wordlist generates an effective "alphabet" of 2048 "characters" as there are 2048 words in the BIP39 wordlist... your odds of "quasi bruteforce guessing" it are orders of magnitude worse than attempting to bruteforce a "simple" 12 character password using uppercase/lowercase/numbers which is a 62 character "alphabet".


No, the only thing needed to download a blockchain.info (now known as blockchain.com) wallet file (note: it is NOT actually a wallet.dat file, it's a text file in JSON format usually called "wallet.aes.json") is the wallet ID (and your "2FA" code if you had it enabled), as per the btcrecover docs:
That is a generalised recover guide that applies to a lot of different wallet software/applications. It is NOT specific to Bitcoin-Qt/Bitcoin Core. It even suggest that here:

So, that thread is more aimed at someone who has access to a wallet or private keys or some other form of "backup" (like a seed mnemonic)... and aren't quite sure exactly what "format" that backup is in and/or what wallet software/application they may need to use their backup with. Your situation is completely different, as you have nothing except possibly a broken hard drive.


The short answer is that if you don't have any backups of your original wallet.dat, or any way to recover the wallet.dat from your old drive, then your wallet is lost forever. There is no way to reconstruct it from any other information.


You click the "quote" button on the post you are trying to quote.

Then the only wallet you could have been using that would have used a word list is Electrum.

Do you still have most of the words from the word list?  If so, it may be possible to recover your Electrum wallet.  If not, then you will need to find a backup of the wallet data file (or recover the original file).

I should mention, by accident, inadvertant, I never used a web based wallet hosting service.  It was all local storage, not using any web/internet based hosting system.  I didn't even know they existed when I mined it all those years ago.

Wish I knew how to do quoting on here.  It seems I've run into a plethora of misinformation out there.

Okay so here is the a link to the post that inferred the idea that I could get a copy of my wallet.dat file from the bitcoin blockchain itself.  Scroll all the way down, it's posted by HCP.  Post is June 24th 2017 https://bitcointalksearch.org/topic/how-to-use-btcrecover-1976001 Wallet ID is mentioned, however there is nothing stating that it's a commercial website not affiliated with bitcoin itself.  Again I had literally assumed that it was and that the wallet ID mechanism is thusly part of the bitcoin blockchain.  I saw there are timestamps on there.  I know when I mined it and how many transactions were going in and out of the wallet, so I had assumed I could narrow down what wallet was mine, along with the IP address assigned by the ISP and thus a rough geographical location.  So in a sense, using metadata about the wallet.  Look for a wallet matching those metadata criteria, download it, try recovering it.

This page at https://github.com/bitcoin/bips/commit/ce1862ac6bcffa1dd20aad858380e51e66e949ea#diff-f01f2760502eccb8cb2ede8981e31b82 gave me the idea that if I could remember enough of the passphrase/list of words that I could quasi bruteforce guessing what it is, as long as some of it is already known.  It would be known as a salted word list lookup at that point, also a non bruteforce password attack.  At this point I had assumed the list of characters that I know I saw but can't remember what they were, was the 12 word, fixed word private key or seed.  Unbeknownst to me that it's not possible because the wallet version was too early.  So then I wondered that it was a wallet ID.

The UUID was in the directions to something but I'm not sure what, I suspect the directions to using btcrecovery.py.  That, a wallet transaction number and some other things were required criteria to find and download the wallet.dat file, probably from blockchain.info.  Again this one I don't have eividence of the misinformation.

This thread has no information at all on what versions of the wallet it applies to, so I thought and assumed it meant all of them.  There is no indication otherwise https://bitcointalksearch.org/topic/overview-recover-bitcoin-from-any-old-storage-format-4959742  BIP39 I had no idea what version of the wallet it applied to.

On the aspect of the drive platters, yes I know the only way I could get data off the drive is sending it to a forensics lab and hoping the file wasn't over written.  There's also the potential issue that the oxide is failing/failed and flaked off, compromising the signal strength and so on.

I did more reconstructing of various life events during that time period and indeed it was at roughly version .3.12 or so, but definitely before version .4 came out.  Also it flagged the lack of SSE2 and fell back to SSE when I mined it.

I've been mining alt coins for the last two and a half years as a side hobby.  So I know the importance of making a backup of the wallet.dat file and not just one but two or more, depending on how much you value the coins.  Whomever owns the private keys, owns the coins.

Anyone have ideas how else i could retrieve the wallet?  I know less about it than probably everyone on here.  I've mined the 'forks' but never the original bitcoin except for way back on this wallet.  So I do know there is lots of room for various parameters and rules to have changed due them being forks of the original BitCoin project.  A different POW algo is one thing that could be changed.

Does anyone know how to calculate how much whatever it mined would be worth?  It ran for about 10 hours on an AthlonXP 2800+, well before GPU mining.  So for all I know perhaps .0005 bitcoin.  I was never expecting to find a million dollars in bitcoin, I've just wondered how much was in there with the assumption it wasn't hacked or broken into.  I don't remember the hashrate nor difficulty.  I've been reluctant to post this info but it seems currently there is no way to get it back and there is nothing to lose.

Early on, there were a variety of web based wallet services.  Some of those provided a word list to allow the user to rebuild their private keys if the website were to get shut down. Most of the services that provided word lists (seed mnemonic) came after BIP39, but there were a few developers that rolled out the seed mnemonic concept before BIP39. I'm not positive, but I think blockchain.info may have deployed  seed mnemonics before BIP39? Also, I'm pretty sure Electrum had a seed mnemonic before BIP39, but they wouldn't have had a UUID.

If you have the full word list, and know which web service you were using, then you might be able to re-generate the necessary private keys.

If you don't have the entire word list (or at least nearly all of it), then you aren't going to get anywhere.

Unless you want to try sending it to some sort of data forensics lab, then basically your quest is over.


As far as Bitcoin-qt/Bitcoin Core is concerned, there is no such thing as a UUID/wallet ID number... and you certainly can not retrieve a copy of the wallet.dat from the blockchain itself. I'm not sure what you have been reading, but this information is incorrect.

A "wallet.dat" is simply a Berkeley Database data file... it (normally) contains a number of private keys (and in more recent "HD" wallets, it will contain a "seed") and information relating to those private keys (that is to say the matching public keys and derived addresses and transaction history relating to these.

The private keys are NOT stored in the blockchain in any shape or form. You absolutely can NOT recover these if your copy of the wallet.dat is gone.


Again, this is incorrect. 12 or 24 word recovery phrases (aka "seed mnemonics") were generally introduced to wallets following the BIP39 standard. BIP39 was first proposed: 2013-09-10. It certainly wasn't around int he first year of Bitcoin as you believe you were operating.

In any case, even today, Bitcoin Core does NOT adhere to this standard, so there is NO 12/24 word recovery phrase that you can use to recover your wallet.dat. If you have/had a 12/24 word recovery phrase, then it is for a completely different wallet.

The python-based "btcrecover" can be used (amongst other things) to try and brute force a forgotten password from a wallet.dat that had a password set... it can also be used to discover a missing word or two of a 12/24 word recovery phrase (assuming you have other information like an address that was generated from the seed derived from the 12/24 word phrase). It will NOT be useful to recover a wallet.dat.


None of that info will be useful to you. Your wallet is NOT stored on the blockchain... there is nothing to narrow down. Transactions contain very little metadata, and certainly nothing that identifies what wallet it came from.


Correct.


Again, you're talking about UUID and/or Wallet IDs and/or "accounts"... these are NOT concepts that relate to Bitcoin-qt/Bitcoin Core.

You're either referencing wallet IDs from blockchain.info (now blockchain.com) or some other web-based wallet... impossible to know which without having the actual ID... If you had an account or id or something, then I am fairly certain that you were NOT using Bitcoin-qt/Bitcoin Core.

Have you looked through old emails to see if you have anything from Blockchain.info? One of those might contain a wallet id number. Or you can try options here: https://login.blockchain.com/#/help (if you have access to old email accounts originally used with blockchain.info)

Not that "blockchain", based from "wallet ID" you're talking about the online wallet of blockchain.com/info.
And it isn't Bitcoin's blockchain, they have a "blockexplorer" service but it's not affiliated with Bitcoin, they just used the name.

If it's the earliest versions of Bitcoin-cli, there's no other way but to recover that wallet.dat or any latest backup of it.

So let's say it was before version .4, how did the security work back then?  Though I am aware of the possibility that someone already hacked into it and stole the coins that were in it.  So it could be that I go through the trouble but only get to glean an education in bitcoin and how the BitCoin implementation of blockchain works.  I'm not easily finding documentation from that long ago.  There are more details I can think of but I'm not sure how much I should post.

Reading through the link to what looks like a change log that ends at .4 thank you for the link Going to look through it and check for some varoius things that may help narrow the time frame down.  I remember lots of various details about mining it but the really important stuff, not so much.

Yeah I'm trying to get more mental mnemonics going.  What I remember doing, is running it for a while and then succumbing to peer pressure that it would never go anywhere and the questionable legality aspects to it also dissuaded me further.  If it was considered something of value, were exchanges legit and so on.  The potential it had for facilitating criminal activity.  Also the idea of leaving ports open to host the blockchain database wasn't very appealing as hackers could get in that way or so I was told.  I had extremely little understanding of any of it.

Went and did research and educated myself from some of the replies.  The actual HD it was on I think crashed.  It was a PATA drive 200 GB. Mechanical failure roughly, the voice coil went bad and the spindle motor couldn't sync anymore and get the platters to speed.  I 'might' still have the drive but I'm not sure.  So the idea of retrieving the wallet.dat file is most likely impossible going that route and method.  I had deleted it too but I know if a file is not overwritten it can be recovered.  But hence the issue with the spindle motor.

So I kept reading and researching.  From what I read, I need the UUID/wallet ID number, from that I can retrieve a copy of the wallet.dat file from the blockchain itself.  From there I need at least some of the 12 or 24 word passphrase(?).  I found out about  btcrecovery.py,may work if I can get enough of the word passphrase.

It's kind of ironic, I remember the circumstances and alot of the details of when I mined, the one password and other bits but other stuff, not at all.  I know what I did what is now known as solo mining, so it was before pools, or maybe I just didn't know of pools yet.  There was no GUI, it was all in a MSDOS promtp/command shell.  Text only etc...

I've discovered the blockchain explorer at blockchain.info which is now apparently blockchain.com.  Is there a way I can identify a wallet by when it was mined to and or where it was mined at by IP address?  I do know who my ISP was back then, where I was, how long I mined and when and so on.  I could narrow down the wallet from the blockchain that way.  Metadata from the transactions.  I'm realizing that without the wallet.dat file I'm dead in the water.

I do remember there was a long string of words that to me seemed random, I was puzzled how it was a password or passphrase.  I do remember setting up a password for an account though, and I remember what that one is.  THere was a bunch of things I didn't understand, what a UUID or wallet ID was one of them.

I do wonder that it was somehow version .4 or another, but it was definitely early in the development and history of BitCoin.

This is becoming something of an adventure

Sounds like you're confusing several wallets into "one"...

You talk about "wallet.dat" which is Bitcoin-QT/Bitcoin Core but then mention "Seed Phrase and then the other password" which sounds similar to the old blockchain.info recovery phrase and "second password". By "wallet file", perhaps you're thinking about the backup wallet file that you could download from blockchain.info?


Note that "Passwords" (terminology used with Bitcoin-QT/Bitcoin Core is "passphrase") were only added to the wallet.dat in version 0.4.0 which was released 23 September 2011. Refer: https://bitcoin.org/en/release/v0.4.0

to recover your coin you need something to work on like seed phrase, private key, or dat file
if you don't have wallet.dat file you can't recover your coin
and bitcoin wallet doesn't have seed phrase that you can use to restore your wallet
but if you still have the drive, you may have a chance to restore your wallet file

there was no seed phrase available on old bitcoin (core) wallet,
even current bitcoin core version doesn't provide seed phrase, but only hdseed

Do backups on multiple places/ devices, from desktop, laptop to portable drives.

To make sure that when one of backups broken or OP does something wrong and destroy backup, he will have the others available to use. Saving only one backup on one device brings some level of risks to lose funds.

you can always check your "random bunch of words" against the BIP-39 word-list to see if the words are even among them or not. the lists can be found here: https://github.com/bitcoin/bips/blob/master/bip-0039/bip-0039-wordlists.md
additionally BIP-39 and most of its alternatives support only a certain word counts. for example you can't have 5 words or 30. it should only be: 12, 15, 18, 21 or 24 words with 12 and 24 being the most popular.

There are wallets that used mnemonic seed even before BIP39 was introduced. But it's certainly not Bitcoin Core.
Electrum for example had their own seed words implementation and 1.8.1 was released on Aug 2013(?). IDK the exact date and the older version's dates.