Questions tagged [bitcoin-core]

This tag should be used for questions pertaining to Bitcoin Core. Bitcoin Core is an MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client". This tag should be used when referring to the Bitcoin Core software.

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2
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1answer
178 views

Is the keypool erased when changing wallet password?

In Bitcoin-qt, when a previously unencrypted wallet is encrypted, the keypool is erased and replaced with new keys. Does this also happen when the password of an already encrypted wallet is changed?
4
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2answers
2k views

Bitcoin API - createmultisig - what is redeemScript?

The Bitcoin API call of createmultisig returns two parameters - address and redeemScript. What is the latter used for?
5
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2answers
404 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 ...
2
votes
3answers
4k views

0 connections now, but I had been using Bitcoin QT for a while without problems

I had been using my Bitcoin client for months on my Windows computer running XP. One day, I have trouble connecting to anything else on the internet, but my Bitcoin client seems to be running okay. ...
3
votes
1answer
577 views

Bitcoin-Qt wallet passphrase help

I do not remember being asked for a passphrase when I installed Bitocoin-Qt (0.8.2 - Beta) (though it was a couple months ago, I could be mistaken) and now am being asked for a passphrase. I have no ...
1
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4answers
2k views

Different balances Bitcoin-Qt vs. Blockchain.info

Why is the balance in my Bitcoin-Qt wallet different from the balance when I check the information about my address on blockchain.info? All transactions are confirmed.
2
votes
1answer
5k views

Where is bitcoin-qt's blockchain stored in Windows 7?

I need to manually resync from scratch due to a database corruption caused by windows auto-rebooting. Where is the blockchain stored so I can delete it (and hopefuly prompt bitcoin qt from creating a ...
2
votes
1answer
139 views

Bitcoin QT computer time

Bitcoin qt says my computer time needs to be correct for it to work properly. My time is right to the minute, but not the second. Will this cause a problem?
9
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7answers
11k views

Bitcoin QT error. How can I prevent corruption of database?

So I turn on my computer this morning, and I find Bitcoin QT has quit of its own accord. I try to turn it back on and I get this message. "Bitcoin - Error System error: Database corrupted" I'm ...
2
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1answer
2k views

Will my bitcoin wallet take prohibitively long to sync as daily transaction volumes grow?

I'm using Bitcoin-qt on Mac and it's been a few weeks since I last fired it up, so it's doing a sync. I've waited a few hours now, despite being on powerful hardware and a fibre connection to the web. ...
0
votes
2answers
717 views

How to find out if Bitcoin is running ANYWHERE on my laptop

Sooo long story short, I have a Samsung series 7 laptop, i'm running Fedora 18 and I downloaded Bitcoin-qt not too long ago. I am admittedly stupid for doing so before doing ALL proper research (...
2
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3answers
2k views

How do you load the Android bitcoin backup key onto Bitcoin Qt?

I have an Android wallet key and I want to load it onto my windows desktop. I am using Bitcoin-Qt, but i dont see an import option anywhere. How can this be done?
1
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1answer
19k views

How to use my own web hosting server to mine a bitcoin? [duplicate]

I have a web hosting with unlimited bandwidth and unlimited disk space, Cpanel and much more. Can anyone guide me. How to mine a bitcoin by using my own web hosting?. Then there is any mining software ...
1
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3answers
13k views

Mine BitCoins on a Mac? [duplicate]

Ok, so I can mine BitCoins on my Mac... using my Windows Partition. Like a lot of people I hate Windows. I'd use Linux first (I have a WUBi partition), but I'd like a BitCoin miner for Mac that ...
2
votes
1answer
146 views

(How) can I run standard clients on a “toy” block chain?

Say I build some software around the Bitcoin system and I would like to try stuff without having to earn real BTC first, and without having to employ a lot of hashing power to grow the block chain. ...
5
votes
3answers
5k views

Is it possible to make a paper wallet out of a bitcoin-qt wallet?

I have a single bitcoin address with all my savings on it. I want to make a paper backup for precaution (as if my hard drive somehow exploded) with that specific address. Is that possible? Keep in ...
3
votes
1answer
2k views

How to access any transaction detail in Bitcoin version 0.8 and above?

Since the Standard Client version 0.8 removed the full index of all historical transactions, some Bitcoin applications that relied on that functionality have stopped working. For example, one is no ...
5
votes
4answers
7k views

What does Litecoin offer over Bitcoin?

Litecoin is different from Bitcoin in the following ways, however none of them are particularly useful and on the contrary are only less worthy. 84 million vs 21 millions: since Bitcoin is divisible ...
-1
votes
1answer
165 views

bitcoin upgrade needed: the current client is not synchronized

I have bitcoin client 0.6.0.6 (no longer supported!): I did not upgrade on May15. My current client will not synchronize past 85%. no luck with, DB_CONFIG set_lk_max_locks 537000 I am in the ...
0
votes
1answer
3k views

Unable to bind to 0.0.0.0:8333 on this computer. Bitcoin is probably already running

I installed bitcoin-qt and my wallet was all synced, everything working as it should. I sighed up for slush's pool and was trying to connect the 2 and I think I may have clicked the box to run SOCKS ...
1
vote
1answer
564 views

In Bitcoin Qt, what does “Message” mean in the request payment form?

In Bitcoin Qt, if I go to "Receive" and right click on an address, one of the options is to "Show QR Code" for an address. Below the QR code, there is a form looks like this: [ ] Request payment ...
20
votes
1answer
14k views

Get non-wallet transactions using bitcoin rpc (gettransaction)

I am playing around with Bitcoin-qt. I want to iterate all blocks and all their transactions. So far I've been able to get a list of all tx's in the blocks I want to. Now I want to get information ...
2
votes
1answer
1k views

Can an old passphrase recover my bitcoins using an old backup wallet.dat file?

I forgot the new passphrase for my wallet. But i previously backed up the wallet with a passphrase i do remember. Can i then access that previously saved wallet and recover my btc ?
1
vote
3answers
8k views

Bitcoin-Qt wallet is taking forever to synchronise. Can I just use the same address elsewhere to collect coins?

It will take several days before the wallet is in sync. I already purchased a bitcoin and am waiting for it to transfer into my account using the address that was generated by Bitcoin-Qt. Can I just ...
4
votes
1answer
472 views

Where is the bitcoin automatic address generation?

I have head of the automatic bitcoin address generation feature for every transaction. I have done multiple transaction, but I still have the same addresses (I have two addresses). I would like to ...
3
votes
1answer
1k views

Where is the location of the private keys of my wallet on my PC?

I have searched this forum and the internet for information on the location of the private keys of my wallet on my PC and found no answers. I am using Microsoft Windows 7 and installed the Bitcoin ...
4
votes
1answer
627 views

Has the Timestamp Server from the original whitepaper ever been developed?

In the original whitepaper Satoshi proposes a creation of a timestamp server to authenticate that Bitcoin blocks were not created later than at a given time. Has this feature been ever implemented or ...
4
votes
1answer
4k views

Why is bitcoin-qt startup so slow compared to MultiBit

Bitcoin-QT: Very long startup and at first launch needs to download the entire blockchain Multibit: Starts up in a few seconds and downloads for only a few seconds Why is Bitcoin-QT so slow?
2
votes
1answer
343 views

Using Bitcoin Commands

On the page https://en.bitcoin.it/wiki/Running_Bitcoin it shows several commands. Is this only for the bitcoin qt or can I use a more lightweight client like Electrum?
2
votes
1answer
147 views

Bitcoin “Quits unexpectedly” everytime but only on my account

Everytime i try to open Bitcoin QT it quits unexpectedly, however if i log out and log in using another account on the same Mac, it works fine. Can i use the other account (where my Bitcoin QT opens ...
5
votes
1answer
966 views

How do I recover Bitcoins from a Change address that is in a corrupted wallet?

I am running Bitcoin-Qt for Mac 0.8.1 beta I received a "wallet.dat corrupt salvage failed" error and the client refused to launch. I replaced the wallet.dat with a backup made a few hours earlier ...
2
votes
1answer
1k views

Why is my /Library/Application Support/Bitcoin directory missing?

I can't launch the latest update, now it just 'unexpectedly quits' before loading. I tried uninstalling and reinstalling a couple of the past versions, but the directory folder was never created. ...
1
vote
0answers
84 views

Bitcoin-Qt locks up

During Initial Sync BitCoin-QT to lock-up and cause Debian Wheezy to crash and reboot...no error message. How do I fix this issue? Subsequent execution of client software has same result.
4
votes
1answer
220 views

Send coins from another adress

Newbie here! I need to confirm something: I have bought bitcoins and I already see them in the QT client I am using. I now want to send the bitcoins using a different address than the one I use to ...
3
votes
0answers
33 views

Bitcoin-QT Merge Question [duplicate]

Can one import wallet.dat into Bitcoin-QT without overwriting the current wallet? Kind of like a merge function? Or is Blockchain.org the only we to merge wallets together under one account?
2
votes
1answer
2k views

Do I need to wait for Bitcoin-Qt to sync with the network before using GUIMiner?

I'm waiting for Bitcoin-Qt to synchronize with the network, but it takes a long time. I'd like to know if I can start using GUIMiner while it's Bitcoin-Qt is still synchronizing.
3
votes
2answers
2k views

What does Bitcoin-Qt “Change Passphrase…” do to existing private keys and corresponding addresses?

"Change Passphrase..." obviously lets me encrypt the wallet with a new string of text. I think (correct me if I'm wrong) that this creates new private key(s) inside wallet.dat. How are existing ...
45
votes
4answers
156k views

Import wallet.dat into a new Bitcoin-Qt client

I had Bitcoin-Qt on my computer with several bitcoins in my wallet, using Vista. Then my computer crashed. Finally I was able to get my computer fixed and download a new version of Bitcoin-Qt. Now I ...
1
vote
1answer
1k views

Bitcoins didn't arrive to new wallet

I use Bitcoin-Qt. Decided to make another wallet and transfer some bitcoins there. Wanted to give that wallet to my friend as a gift. What I did was: renamed wallet.dat file to 1_wallet.dat started ...
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 ...
7
votes
2answers
4k views

What does qt in bitcoin-qt stand for?

just a simple question: what does qt in bitcoin-qt stand for?
1
vote
1answer
1k views

Using the main Bitcoin-Qt Client, can you change where it stores the block chain? [duplicate]

I don't want 12 gigabytes stored on my boot drive. Can I change where the Bitcoin-Qt stores the block chain?
11
votes
1answer
11k views

How to transfer only the blockchain to a friend's computer?

After installing the bitcoin client (Qt) a friend got interested as well. He doesn't have as fast an internet connection, though, so I thought of burning some DVDs with the blockchains for him to have....
0
votes
1answer
110 views

Upcoming Fork - Wallet Safety [duplicate]

In downloading the newer client, do I need to worry about my addresses and hence bitcoins disappearing, or will everything in the old wallet transfer nicely into the new?
6
votes
2answers
4k views

How does the signature verification feature in bitcoin-qt work without a public key?

bitcoin-qt has a "signature verification" feature where you can verify a signed message. All it needs is the bitcoin address of the signer, the message and a short signature. From what I understand ...
2
votes
1answer
1k views

How to utilise more cores when I am cpu mining?

This is purely an experiment for fun. This is for litecoins but can bitcoin people help me too :) I am using litecoinqt to solo cpu mine, on my windows machine. Threads set between 4 and 10, scantime ...
2
votes
1answer
276 views

Buying Bitcoins using Guyana Dollars

Does anyone know what is required to establish an exchange that accepts Guyana $ as payment for Bitcoins?
1
vote
1answer
1k views

Bitcoin-Qt Command line - adding private key - Mac OSX

I recently created a custom Public key (with vanitygen) and i would like to add the corresponding private key to my bitcoin-Qt wallet client. I have started bitcoin-Qt in server mode using: $ open ...
15
votes
1answer
14k views

How do I specify in which directory Bitcoin blocks and other data should be stored? [duplicate]

I am on Windows and installed the Bitcoin wallet. The block folder seems to grow bigger everyday and is stored on my C drive in the roaming directory. I would like to set this to some other folder on ...
3
votes
1answer
274 views

Is there a command I can type into Bitcoin-Qt to see the total number of bitcoins that have been created?

I know how to obtain this information from other means, I specifically want to know if it's possible for me to obtain this information using the Bitcoin-Qt client alone. I am running it on Windows ...

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