Questions tagged [wallet]

This tag should be used for questions that pertain to wallet software. A wallet software is a piece of software which manages users' keypairs, addresses, and transactions. Wallet software also allow a user to send and receive Bitcoin.

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16
votes
4answers
5k views

Cannot access my bitcoins because my wallet is still synchronising. What can I do to spend them immediately?

I have purchased bitcoins and have downloaded Bitcoin-QT, but my wallet is taking forever to synchronize to the network. I can't access my wallet because it is still in the sync process. I have the ...
2
votes
3answers
1k views

What kinds of wallets are there?

Can I get short a explanation about cryptocurrency cold/hot wallets? Are there more kinds?
39
votes
3answers
42k views

Who gets Bitcoin transaction fees?

Whenever I send bitcoins from one wallet or one exchange to the next there is always a fee. This makes sense with the exchange sites, they are just collecting the fee so they can make a living. What ...
47
votes
3answers
62k views

What's the difference between a wallet and an address?

Bitcoin seems to have the concept of a wallet and an address. Are they the same thing? If not, how do they differ?
43
votes
2answers
7k views

What is the coin selection algorithm?

When creating a transaction in the standard client, what is the algorithm used to determine which unspent outputs will be used as inputs? Has this changed since the first version? What different ...
43
votes
10answers
10k views

How can I keep my wallet secure?

The standard Bitcoin client does not encrypt wallet files, so any malicious user that gains access to this file will be able to transfer all the coins to their own wallet. Furthermore, if I lose the ...
26
votes
1answer
11k views

How is a wallet's balance computed?

I am wondering on how a wallet's balance is computed. Basically, from what I've read I assume that you look back at all transactions involving all the keypairs of a given wallet. Adding up all the ...
32
votes
1answer
52k views

How can I restore my wallet?

I just purchased a new laptop and I want to decommission my old one. I have a back-up of my wallet.dat file copied to my new PC. What do I need to do to restore it to my Bitcoin (Windows) client? ...
23
votes
2answers
5k views

How should you backup your wallet?

How often? Is backing it up once enough? Any best practices to storing the backup?
13
votes
4answers
29k views

Help! I sent coins to my bitcoin wallet before it was properly synced! [duplicate]

I sent coins to my Bitcoin wallet not after installing it, but before it had fully synced! Then I closed and reopened it after sending the coins. It had generated a bitcoin address to send to, but is ...
0
votes
1answer
2k views

Reg: Watch only Address

I have been given " Watch only Address" by one of my friends. To make the funds credited into my account or to use the BTC, what is way to get the private key? Do we need to pay anything to ...
20
votes
1answer
15k views

How do I use walletnotify?

I have bitcoin daemon and I want to use the walletnotify option with a json-rpc call. Some of the examples use a "transaction.sh" file for walletnotify. What is it for? What do I have to write in ...
16
votes
2answers
6k views

What information does a wallet contain?

What information does the Bitcoin wallet file used by the Bitcoin.org client contain? Is the owner's Bitcoin balance written in the wallet.dat file, or does it contain a list of transactions that ...
19
votes
2answers
13k views

Bitcoin sent, recipient claiming not received

I sent bitcoins to the address I was given (double checked). The recipient is claiming they did not receive it. I sent them a different payment yesterday at 8:30p and they didn't get it until 4:00am ...
8
votes
3answers
2k views

At what point is a new wallet known by the Bitcoin network?

I was just showing a deterministic wallet to a friend who asked "At what point is the wallet known to the network?" and I could only guess by saying that it is known only when a transaction is ...
44
votes
1answer
8k views

What do the different .dat files contain?

What data do different Bitcoin .dat files contain? How about the other files in the same folder? The wallet.dat file is somewhat documented and there are some ways to convert it to human-readable ...
40
votes
3answers
46k views

Can I use my wallet on different computers?

I'm used to synchronize my data on different machines. Depending on the data I use SVN, Dropbox or SSH (Unison). Is this possible with the bitcoin wallet, too?
23
votes
2answers
36k views

What is the wallet “word seed” that is commonly used in popular wallets clients and what does it do?

I've been using a pretty old version of Multibit classic and recently decided to upgrade. I tried out Multibit HD and Electrum and noticed that both have me set up a wallet with a "word seed"...
-1
votes
1answer
1k views

Recovering the private key from a blockchain wallet address

One of my friends used my wallet to import a funded blockchain wallet to my wallet id. First this wallet is watch-only and I can't spend the bitcoins inside this wallet because I need the private key. ...
45
votes
8answers
101k views

Where are the user's bitcoins actually stored?

On the person's computer? On bitcoin.org? :) Where does that information reside that tells others and me how much bitcoins I have? I assume it can't be on my PC because I could easily hack the file ...
35
votes
5answers
7k views

What is a deterministic wallet?

It sounds as if it's a process that enables a wallet to be rebuilt from a passphrase, or from several fragments scattered about. Could someone provide a detailed technical explanation?
6
votes
1answer
5k views

What options does one have to manage Bitcoins?

I started trading and buying Bitcoins for a while now, and realised: I have multiple wallets and multiple websites where I have bitcoins/litecoins. I think most of the people, including me, want use ...
27
votes
2answers
15k views

How can I combine all the tiny amounts I've received to minimise transaction fees, and do I need to?

Important parts in bold, for those who don't want to read the detail! I've received lots of tiny transactions, in amounts sometimes as low as 0.000003BTC. Even though I've also received (relatively) ...
7
votes
3answers
24k views

Using dumpprivkey to make a paper backup

I'm just getting started with bitcoin and haven't acquired any significant amount yet, but want to feel relatively secure before I do. And at the moment, my fear of losing bitcoins or a device on ...
9
votes
2answers
4k views

Is there a way to change the wallet.dat location without changing the entire data directory?

I know that Bitcoin supports the -datadir command line option which specifies that the wallet.dat and blockchain should be stored in a custom location rather than %appdata%\roaming\bitcoin but is ...
5
votes
1answer
1k views

a few questions about how HD wallet works

I've read through HD wallet from various resources and have got the basic understanding about it, but am still confused by a few details 1) Each non-hardened public keys (thus addresses) can receive ...
28
votes
2answers
8k views

Is there some way to merge two wallets or to import/export addresses?

I've got one wallet.dat from my laptop and another on my desktop, each containing various (different) receiving addresses that I use pretty often. I'd like to merge them into a single wallet.dat so I ...
25
votes
2answers
3k views

In order to reduce fees, can I 'consolidate' my wallet by sending the entire balance to a new address in the same wallet?

My balance is currently made up of lots of small amounts I know I'm not going to be using my bitcoin wallet for a while, so I don't care if the consolidation transaction is slow. Would creating this ...
8
votes
3answers
5k views

What is the best way to recover from an accidental double-spend?

Came across an issue where I was given the message: "Error: The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of ...
10
votes
5answers
15k views

How to restore locally a MyWallet backup?

The website blockchain.info has an online wallet system MyWallet which creates backups with a .aes.json extension. While I understand it's a json file encrypted with AES using my passphrase, I'm still ...
6
votes
3answers
8k views

Lost my Bitcoin wallet and have only 11 out of 12 mnemonic seed phrase words. How can I get my Bitcoins?

I am new to the whole Bitcoin thing, and I am having my first attempt almost going sour. I lost where I created my wallet. I have my Bitcoin address and only 11 of my mnemonic seed phrase words (of 12)...
15
votes
4answers
12k views

Is it possible to figure out whether two addresses are in the same wallet?

I'm wondering, if I sent some bitcoins from one of my own addresses to another address in my wallet, will it be possible for someone to figure out that both addresses are in the same wallet? Or can I ...
7
votes
3answers
9k views

How can I export all my private keys using bitcoind?

I know that PyWallet has a -dumpwallet but without using pywallet, how can I export all the addresses and privatekeys with the stock bitcoind? Is there an API command that lists all addresses held by ...
12
votes
2answers
50k views

If I've lost my wallet, but know my bitcoin receiving address, can I get my bitcoins back?

Although I do have a backed up wallet file, I seem to also have a second bitcoin receiving address, which doesn't seem to correspond to it. Is there a way to recover any coins associated with that ...
9
votes
4answers
10k views

Is there a known way to export my wallet private key from the “Bitcoin Android” app (com.bitcoinandroid)?

A while back, I installed the Bitcoin Android app and moved 5 BTC on it. Fast forward to now, new phone, new ROM, and the app seems completely unwilling to update its blockchain, meaning I have no way ...
5
votes
5answers
21k views

My client stopped synchronizing, how can I access my wallet?

My wallet has been stuck synchronizing for 21 days, my transfer is in the block chain but I can't get it to sync with my wallet. I've closed firewalls, uninstalled and reinstalled QT with back up and ...
8
votes
2answers
5k views

Can wallets be shared by different machines?

I have a bitcoin client installed on machine one. Let's say it has 5 coins in there. I then have another machine, with another client on it. Can both machines see the same wallet? Do I have to have a ...
6
votes
4answers
986 views

What is a Bitcoin wallet?

What is a wallet in the context of Bitcoin? What are wallets used for? What relation do wallets have to other concepts such as addresses, private-keys, client-software, and Bitcoin balances?
4
votes
1answer
13k views

How to recover an old wallet.dat file

Back in 2011 when bitcoin started to make the news, I created a wallet and let it run for a bit (no pun intended). It almost fried my computer so I stopped. In the process, I think I remember I mined ...
0
votes
1answer
207 views

Is there something in a debug.log from 2011 that would tell me if there are BTC in an old wallet.dat?

I took an old laptop out of storage today because I recalled trying to mine BTC years ago. I remember giving up quickly because, whatever the UI was, it showed that I had mined 0. I'd like to confirm ...
20
votes
4answers
18k views

Moving the Bitcoin folder from AppData

Bitcoin's taking a lot of space on my C drive, and I would like to move it to another drive. I've figured out to do it using symbolic links, but the problem is that my Bitcoin client is currently ...
23
votes
6answers
26k views

How do I get the public bitcoin address from a given private key in wallet import format offline?

I have made paper wallets. And I continually send what bitcoins I get to them. I'm paranoid that I've been sending bitcoins to the paper bitcoin addresses where somehow at sometime my saved private ...
15
votes
3answers
4k views

Estate planning: how can I ensure my bitcoins are inheritable?

What are good ways to ensure my bitcoins can be inherited by my family when I die or become permanently incapacitated? I think there are probably two significantly different situations to account for,...
6
votes
1answer
18k views

What does change address mean inside Electrum wallet?

I am bit confused with the change label that is inside Electrum Wallet . Can I receive bitcoin if i give this address which are under change label? What is the difference between Receiving and Change ...
7
votes
2answers
13k views

How do I transfer BTC in cold storage?

I understand how to send BTC to cold storage or offline wallets, but I can't seem to find information on how to send BTC from cold storage to, let's say, a wallet on my computer, or a website, or a ...
7
votes
1answer
7k views

In case of the Bitcoin split - when holding BTC on blockchain.info - will I receive coins on both forks?

Everyone says: If you do not hold private key to your BTC, you do not own BTC. Technically speaking I do not hold the private key, but I do have the 12 words backup phrase. I would like to know ...
6
votes
2answers
5k views

Bitcoin-qt multiple wallets and transferring between?

I am sharing pool mining with a friend with equal cards. We are splitting what we mine in half. I also have a couple extra cards of my own. I want to have one wallet for our shared stuff and one ...
3
votes
1answer
1k views

Why does Bitcoin use separate change addresses?

When you create a wallet, it creates one bitcoin address, correct? When I send funds, it sends all my funds; the person I sent it to gets what I sent, and the change from the transaction is sent to a ...
6
votes
3answers
2k views

Importing private keys creates different address

How does importing private keys work? I have previously imported the private key for a 1Archive... address into Bitcoin Core and noted then it added an address like 1AXbRq... and I didn't follow it ...
15
votes
3answers
8k views

Copy wallet to Electrum or Multibit?

Is there a way to import my wallet from Bitcoin.org's client into the much lighter Multibit or Electrum? The disk space & bandwidth consumption (not exactly well presented to a beginner) quickly ...

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