Bitcoin-Qt is an MIT-licenced Qt 4 GUI application for the original Bitcoin codebase.

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Bitcoin-Qt & Setgenerate True Command

An earlier user posted somewhere that all one needs to do to solo mine is run Bitcoin-Qt, open up the console and enter the command "setgenerate true" ... Is this accurate? And if it is accurate, ...
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17 views

Just installed bitcoin, but it won't connect

Total newbie at bitcoin; long time Linux user. kubuntu precise 64: My first attempt was just to download it (a slightly older version than the one from the ppa below), untar it and run the ...
3
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2answers
1k views

How to decode private key from Android Bitcoin Wallet?

I want to import my private key from the android's Bitcoin Wallet (the one created by Andreas Schildbach) but it can export it only in an encrypted way. How do I decrypt the file so I can import the ...
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2answers
1k 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. ...
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2answers
112 views

Transaction fees after 0.9 protocol update

As the changelog of bitcoind 0.9 tells, transaction fees should be greatly reduced. What are the implications of this? How were transaction fees determined before the change and after the change? ...
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14 views

Heartbleed bug and Altcoins - Another question [on hold]

In reference to the post: Heartbleed bug and Altcoins I have this questions to the answer posted there: Do you mean that if we created the coin.conf file for any alt coin wallet with this kind of ...
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1answer
36 views

Qt client not exiting on Linux

I am running Ubuntu 12.04. When I close bitcoin-qt (or any of its derivatives, like litecoin-qt or dogecoin-qt), sometimes it does not completely exit. I then have to run killall -9 bitcoin-qt, or ...
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2answers
852 views

I sent my bitcoins from LocalBTC to a unsynced bitcoin wallet program, the bitcoins are not showing up. How do i get them back?

I sent bitcoins from localbtc wallet to a unsynced program, it says 0 in the balance of the program and I really want them back.
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1answer
38 views

Possible to use BlockChain.info and Bitcoin-QT synced?

I've used both BlockChain.info and Bitcoin-QT. Is it possible to use the same addresses on both? I don't have a incredibly large amount of bitcoins, so I'm not worried about it getting hacked into, ...
2
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2answers
6k views

how do I create and encrypt a dogecoin wallet?

I've looked at the dogecoin wiki, but don't see any resources explaining how to actually create a wallet and encrypt it. I'm running dogecoin-qt on Linux. Under "much receive" on the GUI, I can add ...
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3answers
69 views

How can I send bitcoin from one address to another through the Bitcoin client/API?

How can I send bitcoin from one address to another via Bitcoin client/API ? There exist an API call called: sendfrom <fromaccount> <tobitcoinaddress> <amount> [minconf=1] ...
2
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2answers
157 views

How to send bitcoin with a message attached

Is it possible to send bitcoins with an attached message with the transaction? If yes how to do it?
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2answers
58 views

Cannot connect to bitcoin-qt server

# server=1 tells Bitcoin-QT to accept JSON-RPC commands. server=1 # You must set rpcuser and rpcpassword to secure the JSON-RPC api rpcuser=bhhtufhrt rpcpassword=ferhrhh im trying to connect ...
2
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1answer
35 views

How can I download the blockchain from own, trusted source?

I have two computers with two different bitcoin-qt wallets: Very heavy-weight desktop with a great internet connection. Less powerful laptop with relatively slow internet. I would like to download ...
1
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1answer
24 views

How do I flush the keypool?

After the heartbleed vulnerability, I'm concerned that my private keys could have been compromised. I want to send all my coins to a new address with a freshly generated key. However, if I just ask ...
1
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0answers
30 views

Can I download blockchain updates from somewhere?

I use Bitcoin only on rare occasions - say once every month. I want to avoid long waiting times for downloading and verifying blocks that consequently await me when I reopen bitcoin-qt. There are many ...
1
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1answer
26 views

Which wallet application lets you send to multiple output addresses with just 1 fee?

Which wallet applications lets you send to multiple addresses from one output? I'm looking to build a physical bitcoin kiosk faucet and was looking to see how I would avoid miner fees if i combined ...
5
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1answer
68 views

Transaction refund address

In the what’s new in Bitcoin Core 0.9.0 notes there is a reference to a refund address. I tried to look it up in the forums and the wikis but I came up with nothing. How can I set a refund address ...
0
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1answer
261 views

How to make a payment processor like bitpay which accepts bitcoin

I know it's a tough one,but it's urgent ,I know there exists some other payment procesors like BIPS,BitPagos,BTCMerch and few more like that.So I just need to know how to go about making a website ...
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1answer
87 views

How can I create a new wallet on Bitcoin Core?

How can I create a new wallet on Bitcoin Core (Bitcoin QT)? I forgot my old password, so I can't create transactions using the old wallet. I don't have money on my old wallet, I just need to create ...
0
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3answers
110 views

Ubuntu command to download https://launchpad.net/~bitcoin/+archive/bitcoin/+packages

What command do I use to get the latest bitcoin package under Ubuntu desktop 12.04 LTS? Also, what needs to be done to uninstall previous versions?
10
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1answer
8k views

Bitcoin-Qt setup: Change block-chain file location, settings? documentation?

I am installing Bitcoin-Qt and have been reading about Bitcoin basics, but I found very little information on the client. I have a few questions about the Bitcoin-Qt program (v0.8.1-beta under Windows ...
0
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2answers
378 views

Old bitcoin wallet not working

So Im having a bit of a problem with my bitcoin wallet. See, I got into bitcoin about 2 years ago, back when bitcoins were worth very little real money, if any at all, but I managed to get quite a ...
0
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1answer
247 views

Move bitcoin data from Windows to Mac

Is it possible to move the Blockchain data from Windows to Mac? The wallet on windows is synced, the one on mac is not. The wallet on Mac has had some bitcoins sent to one of its addresses. Would it ...
0
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1answer
179 views

How does blockchain.info get the addressbalance / seen date?

I am trying to figure out how blockchain.info gets the following API functions and is there any way to do these calls on a server (without using their API) perhaps through bitcoind? ...
0
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1answer
143 views

How can I move bitcoin-qt blockchain data to bitcoind daemon?

I have a bunch of files like blk00110.dat now that bitcoin-qt (on my mac) has finally updated. I'd like to just move this over to my linux box so I can keep it up and running but the bitcoind program ...
2
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1answer
599 views

Saved .bitcoin directory full ~9 GB block data, won't work when copied to another system

I had to delete my .bitcoin directory in Ubuntu 12.10, after months of getting the near 9 GB of blk data files. I copied everything over to another machine (and back to the original too) and it gives ...
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0answers
12 views

including a conf file in util.cpp

i am including some code to generate a config file when anyone runs the qt wallet. its just like bitcoin, but a change from maxcoin. this is the code that i included in util.cpp ...
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1answer
263 views

Bitcoin wallet shows empty after I installed Windows on SSD

My PC stopped working a while ago (BSoD on every restart). I bought an SSD and installed Windows 7 64-bit on it (same as I had on my HDD). I then attached the HDD back into my PC and intended to back ...
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4answers
921 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.
23
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1answer
21k 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? ...
1
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1answer
173 views

bitcond and bitcoin-Qt system configuration and bandwidth requirements

What is the best operating system configuration for a computer to run (bitcoind or bitcoin-Qt) and (BFGminer or CGMiner) under Linux, assuming that it will be connected to a 3 Terrahash mining rig on ...
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1answer
51 views

Is change of Bitcoin address of an account possible?

I have multiple Bitcoin addresses in my Bitcoin Daemon, Which address will be used for receive transaction Can i change my default account address(mentioned in 1) to new one
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2answers
512 views

The bitcoin-qt synchronization just stopped

Someone recently stole the computer where my Bitcoin were. As my hard drive was entirely encrypted and as I had backups of my wallet.dat file in three different places, I'm not afraid of losing money, ...
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2answers
504 views

Bitcoin-Qt frozen catching up/sync with Bitcoin in new wallet

I downloaded Bitcoin-Qt, got it running, had 15 weeks or so left to catch up (sync) when I purchased some bitcoins and had them sent to my new wallet. Then to my horror, Bitcoin-Qt has frozen with ...
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1answer
8k views

Trying to access my BTC from Bitcoin-Qt wallet that is out of sync

I bought BTC and sent them straight to my Bitcoin-QT wallet. Now opened my wallet (ver. 4.8.3) and it says ~29000 blocks remaining to synchronize but this is not happening even though I have 14 active ...
0
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2answers
698 views

How can I send bitcoins with Bitcoin-QT using the API?

I'm making a bitcoin-based online marketplace. I've been reading/studying the Bitcoin API commands, and some of the commands need "unlocked wallet". Does this mean a wallet without a passphrase? I ...
0
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1answer
56 views

Anyone able to run Bitcoin-Qt 0.8.6 on Mac OSX 10.9.2?

I ran the Mavericks update today, putting me at 10.9.2 and now my Bitcoin-Qt stops responding after it notifies me that it is "verifying blocks". I am using it for ongoing research and am in a bad ...
3
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2answers
897 views

“Assertion Failed!” when I try to open Bitcoin Wallet

When I try to load my Bitcoin Wallet I get an "Assertion Failed!" window: here is what the window says: Program: C:\Program Files\Bitcoin\bitcoin-qt.exe File: src/main.cpp Line: 1761 Expression: ...
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55 views

Ws2tcpip.h and winsock2.h on Window QT Wallet

Been trying for the past few days but couldn't get it working, I already download the latest cryptopp library but its seems that maxcoin got some issue compiling If I qmake "USE_UPNP=-" ...
0
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2answers
956 views

Why can't my bitcoin-qt sync with network?

For the last 32 hours my bitcoin-qt has been unable to sync with the network even with my firewall and VPN switched off. Any ideas what else to check? Using Windows 7 SP1 x64 and have rebooted the ...
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1answer
43 views

Delete all wallet addresses

How can I delete all addresses from my Qt wallet without having to download the blockchain all over again from the scratch? I would like to find a bulk way to do it as there are a few thousand ...
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2answers
63 views

Bitcoin URGENTLY Need Blocks Files - Download them from some Website [duplicate]

I have been doing this synchronization procedure (first time) in bitcoin-qt for over 85 hours and it only came to 31 Weeks Behind. Withdrawed from localbitcoins like 95 hours ago and obviously this ...
0
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1answer
42 views

Programming for/modding bitcoin-qt on Windows

In multiple places I've found methods of modifying or adding to the bitcoin-qt(or other coin wallet) source on ubuntu or osx, but how would I do this on a Windows machine? If possible, I'd like to be ...
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2answers
59 views

Can anyone without knowledge of encrypted tech use bitcoin?

I am interested in registering online, however I haven't got any knowledge on encrypted language not even on software design or whatever it is called. Is it possible for a person like me to register ...
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2answers
879 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?
2
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1answer
355 views

When do you need to run bitcoin-qt -rescan?

I was under the impression that the -recsan flag was no longer needed for some time now. Can someone document precisely when does one need to run bitcoin-qt -rescan? (and how has this changed ...
0
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1answer
62 views

bonus for my friend

I have use for first time original bitcoin client. When I open show that account bilance is 1,000.0. Why this bonus of 1 btc? 2 question: -Now my friend try open client but his account bilance is 0. ...
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76 views

anoncoin-qt make error

I am getting the following error while installing anoncoin-qt. I am following the installation steps here. $ make cd /home/usr/anoncoin-d/src/leveldb && CC=gcc CXX=g++ make OPT="-m64 -pipe ...