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Questions tagged [wallet.dat]

This tag should be used for questions regarding wallet.dat files. A wallet.dat is a file used by Bitcoin Core which stores private keys and other information necessary to spend Bitcoin.

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1answer
605 views

Bitcoin-QT wallet.dat prior to adding passphrase

On almost any Bitcoin-QT tutorial I notice people recommending to: (step 1) back up your wallet.dat before adding a passphrase. (step 2) Add a passphrase and copy your new wallet.dat to a USB .... ...
1
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1answer
237 views

What permissions should wallet.dat have to be as secure as possible and still work?

I would like to restrict the permissions on my wallet.dat file but but I don't want to stop the bitcoind daemon from functioning. What are the bear minimum permissions that need to be on wallet.dat ...
-1
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2answers
188 views

Doubt about Bitcoin SCI

What's up guys... I'm trying to figure out what's the best shopping card interface I should use. I want a PHP based, simple to work with. Was looking on bitfreak sci, looks good, but the negative ...
0
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1answer
1k views

Lost my bitcoins, was I hacked?

Last time I used my Bitcoin-qt client was a few months ago. I made a backup of the wallet to an external USB drive. Yesterday, I started the client and after it synchronized the block-chain, I saw ...
1
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1answer
1k views

BlockChain.Info Incorrect Balance

Recently my Bitcoin-Qt client started crashing on start-up (running Mac OS X 10.7.4). I was able to stop the crashing by removing the blocks directory and letting it re-download the blockchain. ...
2
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1answer
1k views

Opening wallet.dat in python, using bsddb3

I'm trying to open wallet.dat using the bsddb3 module for Python 2.7. db = bsddb3.btopen("wallet.dat", "r") contents of db: {'main': '\x00\x00\x00\x02'} I have to Which is almost nothing. ls -l ...
6
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2answers
6k views

How frequently should one update wallet backup?

How frequently should one update a wallet.dat file backup?
5
votes
2answers
11k views

Can I check balance of wallet.dat without downloading the block chain?

I have bitcoin associated with a wallet that I am now moving from a server to external storage for backup. As far as I know, all I need to do is copy the wallet.dat file to external storage and I'm ...
1
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1answer
980 views

Shared Wallets and Syncing

A few clarifications about running the bitcoin client (let's say bitcoin-qt) on multiple machines on a private. Question is sort of hypothetical but I was hoping to get some insight into best-...
2
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1answer
290 views

Securing web app wallet.dat (Ubuntu)

I'm building a web app making JSON-RPC calls to the bitcoind server. I have security concerns on how to protect the wallet.dat file. I'm encrypting the directory where wallet.dat will be. Should I ...
5
votes
2answers
399 views

Are desktop wallets transferable?

I know you can make a transaction across the blockchain to move your Bitcoins from say Bitcoin-QT to Multibit, but is it possible to import my wallet.dat file from Bitcoin-QT to another desktop wallet ...
0
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1answer
381 views

Failure trying to import old wallet.dat [closed]

I found an old wallet.dat, but I cannot import it and I don't know why.
1
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2answers
623 views

How can I access a bitcoind instance from another device with wallet functionality?

I'm running bitcoind 7x24 on a linux host on my network so it is always in synch. Options like: -rpcuser=<user> Username for JSON-RPC connections -rpcpassword=<pw> ...
2
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1answer
4k views

What is the wallet in MultiBit?

What is the actual wallet? The slight confusion comes from the install note - "Backup all your wallets. You can do this by exporting your private keys using 'Tools | Export Private Keys'." If a new ...
4
votes
2answers
4k views

How do I switch from Bitcoin-QT to a lighter, faster (SPV) Bitcoin client?

So, keeping up to date with the blockchain is getting ridiculous in Bitcoin-QT, especially on my laptop. If I leave it off or away from the internet for even a short period of time, it takes forever ...
2
votes
1answer
875 views

How to remove private keys from wallet.dat and create “receive only” wallet?

I want to create a wallet for monitoring incoming transactions. So it should be receive only wallet that will be place on hosting, that is potentially not secure. If I understand it well, this won't ...
9
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2answers
8k views

Public Key + Private Key enough to backup?

I invested in bitcoins and unfortunately I have problems to understand the system. Perhaps you can answer me the following questions? 1.a) I know my public and my private key. Do I still have to ...
1
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3answers
2k views

How to transfer private addresses from one wallet to another?

My wallet has 3 addresses. My other wallet has 5 addresses. I just want to synchronize those. How would I do so?
9
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4answers
20k views

How to move an address to a new wallet?

I have a wallet with several addresses. I would like to isolate one of the addresses in its own wallet, but I don't know how to do it. I've been trying with pywallet.py, but I've been unable to do it. ...
2
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2answers
539 views

When do I have to backup wallet.dat?

Is it obligatory to backup wallet.dat after each outgoing transfer? I understand it is, but not after each incoming transfer.
2
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0answers
2k views

Importing a backed-up encrypted wallet.dat

I have bitcoin-qt-0.8.1-beta installed on a computer. I also have another computer in which I'd like to share the same wallet. First, for backup purposes, I have exported the wallet into a backup ...
13
votes
7answers
34k views

Dumping private keys from wallet.dat from command line (pywallet.py alternatives)

I have somewhere in my hard disks some copies of old wallets which I need to analyse. My idea was importing them into blockchain.info, but to do that apparently you need to dump them with pywallet.py,...
0
votes
1answer
5k views

What files do I need for backing up my wallet? [duplicate]

Is %APPDATA%\Roaming\Bitcoin\wallet.dat the only file I need to backup my wallet? I've heard about backing up every ~50-100 transactions is this correct? I thought that with the wallet.dat file, I ...
4
votes
1answer
3k views

technical question: receiving wallet.dat error

I have ~5 BTC on an old laptop (Windows 7) and I tried moving the balance to another client. At first I tried moving about 0.1 BTC just to see what would happen. The client debitted the balance but it ...
1
vote
1answer
1k views

How can I programmatically use several different (isolated) wallets?

I want to use several different wallets (as if one wallet = one account), and want to make sure the spending and receiving activities are exclusive to one wallet at a time. How can I interface with ...
4
votes
2answers
1k views

How can I generate wallet files for multibit or armory?

I'm considering working on a bitcoin project that will need to generate wallet files. I'm not looking to create receipt addresses that a customer can send funds to for an existing wallet. Instead, I ...
3
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2answers
3k views

I sent bitcoins to my wallet before it had synced. is there ANY way i can get my coins back? [duplicate]

I downloaded Bitcoin. qt and started the sync (which was going to take about 6 days UGH) so about 4 days into it i tried to open the app and Now the app shows "error loading blkindex.dat" So i cannot ...
5
votes
1answer
209 views

What if the system crashes if I have made transactions after my backup?

Suppose I have a recent backup of my wallet.dat file. Now I make (say) two transactions: one receipt and one send. Before I run my next backup, the hard drive crashes and I lose wallet.dat. I can ...
2
votes
1answer
453 views

Should a JSON-RPC user be required to use a password when backing up the wallet?

I was surprised I was able to back up my wallet over JSON RPC without requiring the wallet password (or even without a secondary backup-only password) I'm concerned that this could create a DOS ...
4
votes
1answer
663 views

What is the benefit of upgrading the wallet file?

bitcoind -help displays -upgradewallet Upgrade wallet to latest format I have noticed that my wallet format is a few behind bitcoind's version number. Does this mean it is an old format? If ...
10
votes
4answers
18k views

How can I delete an address (private key) in the list of received Bitcoins?

For every transaction I wanted to get, I was creating a new address, but soon I realized that there is just no way to delete all these addresses from the UI. To make it clear, here is a picture: I ...
2
votes
2answers
546 views

Is wallet.dat linked to the blockchain file? [duplicate]

Just started using Bitcoin today and since I needed them rather urgently, I hastily bought them and transferred them to my wallet before actually setting up my wallet. The client is downloading the ...
8
votes
3answers
985 views

Is there a limit to how long a wallet can be offline?

I have a wallet file I backed up June 2011, and has been offline for over a year now. When I copied it back into where the files are stored with the official client, it says my balance is 0, with no ...
5
votes
1answer
841 views

Does Mt. Gox's “Redeem a wallet.dat” feature require an unencrypted wallet? [closed]

Just added to Mt. Gox's API documentation is the ability to Redeem a wallet.dat, which allows a simple way to import (via upload of wallet.dat) all your private keys to be managed by Mt. Gox. All ...