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

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osx - bitcoin-qt v0.8.6 doesn't starts at osx 10.9 non-developer machine

I've compiled a bitcoin-qt v0.8.6 on osx 10.9. It successfully runs on developer machine from 'Finder' (as Bitcoin-Qt.app) and from terminal (as ./Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt). I've ...
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2answers
42 views

How to run multiple bitcoin RPC commands through the command window?

Yes, I can generate a new address through the bitcoin-qt command console, but how might I run a for loop to generate 100 different addresses? What kind of file does the bitcoin client take? Can I run ...
0
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1answer
18 views

Is it possible to get bitcoin-cli without having to build all bitcoin source?

I'd like to use the bitcoin client to examine some of the inner workings of bitcoin-qt (non-invasively, using gets and lists mostly). Is it possible to do this alongside the standard executable? I ...
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1answer
34 views

2 bitcoinqt - getrawmempool returns different results

I have 2 servers with running the same Bitcoin Core v0.9.3.0-g40d2041-beta (64-bit). I use getrawmempool to get all new transactions in the same time but I have different result. One server always ...
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1answer
42 views

How much space does armory and the latest version of Bitcoin-Qt take up, together?

It seems like Armory and Bitcoin Core are taking up 78GB so far, and it's not even done downloading. How much more space will I need? Is it possible to get rid of some of the data after it is all ...
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0answers
22 views

How do I make a new address in Bitcoin-Qt?

I have downloaded Bitcoin-Qt from bitcoin.org, but the version is experimental. I want a full version of Bitcoin. Also, I cant make a new address using the "Receive" tab; there is no detail in the ...
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0answers
10 views

getrawtransaction - find destination and “change” addresses

How to get destination address and amount from result of getrawtransaction and how to distinguish it from "change" address using rpc api.
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1answer
27 views

How in laymans terms do I restore a .dat BTC backed up wallet file on my mac please? [duplicate]

the bitcoin wallet backup.dat file is in my documents but I'm not an advanced computer user I have the complete bitcoin qt on my computer but don't know how to restore from the backup
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2answers
78 views

How do I spend my Bitcoins without waiting for Bitcoin-Qt to sync?

I purchased $50 from ExpressCoins and now it's transferred to the address, but I hadn't realized that to use your program, I have to download 20 gigs of information. Is there a way to access my coins ...
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4answers
97 views

Monitor non-wallet bitcoin addresses for new transactions

This is usual checkout functionality. Show address to the user and needs to monitor it for new transaction during n minutes. Addresses are not unique for each payment. Optional:it would be good to ...
2
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2answers
56 views

Unable to open Backup binary file Linux

I recently reinstalled Linux mint; I backed up my wallet, and I am unable to import the backup created from the original wallet (Qt version 4.8.6.) to the newly installed wallet(Qt version 4.8.6.) I ...
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1answer
81 views

Is there a way to use My Wallet account with bitcoin-qt client?

I have some funds on My Wallet account (Blockchain.info) and I'd like to have a possibility to use them with my bitcoin-qt client. Is there a possibility to do that? Please give short description. I ...
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2answers
128 views

Do i need ~4 years to sync?

I just downloaded bootstrap (~21GB) and started bitcoin base. It shows me that time to sync will be 4 year and 17 weeks? Is it going to change, or do i have to wait that much? My internet downloading ...
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0answers
30 views

Bitcoin QT Can't Sync to server [duplicate]

I just started to try out bitcoin, and I heard you needed Bitcoin QT. I downloaded it and opened it up, and it says "Synchronizing with network" at the bottom. I have had it open for more then 20 ...
1
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1answer
251 views

How do I use mSIGNA without the standard Bitcoin client?

Which IP do I have to fill in in mSIGNA to connect to the Bitcoin Network without using the BitcoinQt/bitcoind application? Is it possible to use mSIGNA and BitcoinQt even if the syncing process is ...
1
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1answer
34 views

Does bitcoin-qt support mining in a pool?

I am having difficulty getting guiminer to share a pool with me but if I mine on bitcoin-qt -gen 1 it starts hashing straight away. So I'd like to know if the official bitcoin client supports pooling? ...
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0answers
35 views

GUIMiner not moving from 'Connecting…'

I've setup bitcoin core, guiminer on my windows 7 intel i7 laptop just to see how things work. As there's no dedicated graphics card I just installed the OpenCL driver for the CPU, joined slush's pool ...
2
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1answer
69 views

Transaction was rejected - Bitcoin QT, recovered wallet.dat

I recently installed a new version of Windows on a new HDD, but I'm having problems getting my old wallet.dat to work. Here's what I've done: Install latest Bitcoin Core. Copied over the blocks and ...
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0answers
39 views

Bitcoin Escrow API [closed]

I have an e-commerce website. In my website there are two types of registered users: Seller (They place an advertisement to sell there product [example:house]) Buyer (Want to buy house of seller ...
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0answers
22 views

If I want to run the Bitcoin client from another OS, can I direct Bitcoin to an already downloaded Blockchain on another OS' partition?

I have fast internet, and it wouldn't be too much of a struggle just torrenting the bootstrap.dat, but it would make sense to make use of an already existing blockchain and save space and time. I've ...
1
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0answers
64 views

Bitcoin Core and Armory working together? [duplicate]

I am confused, totally new to Bitcoin and not really a digital expert, so forgive me if the following is stupid. I downloaded Armory two weeks ago and it asked me to also install Bitcoin QT which I ...
2
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1answer
56 views

Is it possible to specify a default change address?

Is it possible to enable default change address on my bitcoin-qt (aka bitcoin-core) client? I'm using a webservice that monitors my balance (based on public keys) and whenever I send a transaction my ...
1
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1answer
31 views

How does serializing in coins.h work?

I'm talking specifically about this: /** pruned version of CTransaction: only retains metadata and unspent transaction outputs * * Serialized format: * - VARINT(nVersion) * - VARINT(nCode) * - ...
1
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1answer
51 views

How to get the number of the confirmed transactions from Bitcoin QT Rpc

We are building a generic wrapper around Bitcoin-Qt. I wonder if there is way to get the information about the confirmation count of a transaction from a Bitcoin-QT having an empty wallet using the ...
0
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1answer
40 views

How do I run Armory Testnet on Win7 x64 using Bitcoin Core 0.9.3 using remote datadir?

Trying to use the testnet which I have no problems with using Bitcoin Core 0.9.3 with command: Bitcoin-qt.exe -testnet -datadir=f:\data\bitcoincore But running Armory using the Testnet icon attempts ...
0
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1answer
36 views

Bitcoin-qt and lost local blockchain files

For some reason I've lost all data in my .bitcoin directory except the wallet.dat file. Now bitcoin-qt shows 0 balance, and it's 5 years behind sync. Is this possible to restore coins in this case?
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2answers
319 views

How can I transfer the last little bit from my Bitcoin Core wallet to Armory?

I'm moving my bitcoins to Armory because its deterministic wallets are SO much better for keeping good backups. But bitcoin core didn't make it easy for me to sent all my money - if I specified all of ...
2
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0answers
101 views

bitcoin-qt stops subsequent RPC calls, then won't shut down

I am running latest bitcoin client, 0.9.2.1 - running on 64bit ubuntu.. I can start up the bitcoin client, via bitcoin-qt -server or bitcoind -daemon (both have the same behaviors).... ... once the ...
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0answers
36 views

bfgminer on bitcoin-qt

I am getting this error and looking for guidance. Error : Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers config server=1 rpcallowip=192.168.1.0/24 ...
2
votes
1answer
94 views

Bitcoin payout based on real-life event

Just starting to learn bitcoin scripting. Can someone explain how to pay out based on some real-life event? I currently test from the command line with bitcoind -regtest
2
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2answers
67 views

Is Bitcoin a developer only currency and community?

The Bitcoin repo on Github has 7 members. Ultimately, they decide what bug fixes and pull requests get merged. I don't understand how this is decentralized? Yes, it is open source, so anything they do ...
2
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0answers
55 views

Maximum number of transactions in wallet.dat for Bitcoin Core

I know that a large number of key pairs in wallet.dat is not a concern. But is having too many transactions in wallet.dat an issue? Can Bitcoin Core start crashing after it reaches a certain number ...
1
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1answer
27 views

Test in a box duplicating addresses how come?

I copied the whole directory for bitcoin data and then ran two instances one for the first directory and the other for the copied one, and then I generated a new address from the old instance go to ...
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2answers
38 views

Importing keys to a brand new wallet

After I imported keys to the brand new wallet I tried to test that it is imported properly so I ran salvagewallet command to verify my new wallet but got these errors! 2014-08-21 12:17:28 WARNING: ...
2
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0answers
38 views

Bitcoin Core RPC goes does down [closed]

I have issues running Bitcoin core. Steps Install brand new Windows Server 2012 machine. I installed Bitcoin core. It ran ok for 8 hours. RPC server of bitcoin core goes down. When I do CMD> ...
0
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1answer
51 views

Full node of bitcoin

I would like to have Bitcoin Core running as a full node. I thought it is like plus 100 GB. But on the web site it says it is no more than 20 GB. When I run Bitcoin-Qt is it enough to run full node or ...
2
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3answers
1k views

Where to place Bitcoin bootstrap.dat

I'm sure this has been asked many times before, but I've recently gotten into the whole cryptocurrency thing starting with Dogecoin, and I now want to use Bitcoin as well. I am on Windows 7. I found ...
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0answers
23 views

How do I export a private key from my Bitcoin-QT wallet if the wallet isn't synced? [duplicate]

I started syncing a bitcoin-qt client, and had somebody send me funds to an address generated in the client. I then stupidly decided to speed up the syncing process and downloaded a torrent of ...
4
votes
1answer
60 views

Three numbers after dash in transaction id

In Bitcoin Core the transaction id is appended with a dash and three numbers. They are usually 000. What do those numbers mean? For example: ...
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2answers
79 views

How is the previous transaction hash calculated?

Can anyone provide a clear example on how to calculate a previous transaction hash. Say i want to create a new transaction, i get that the hash is calculated by doubling sha256 a message m, but I'm ...
3
votes
1answer
196 views

Is bitcoin-qt using bitcoind? or bitcoind is already built in the bitcoin-qt wallet?

When using bitcoin-qt wallet, all commands are executed externally with bitcoind? I am asking because I saw an altcoin wallet-QT (DMD) which comes as a single file without any daemon file, does it ...
0
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0answers
69 views

Gitian Build Issue - Windows

Got a little issue when compiling Windows QT using Gitian. BTW Im using a Ubuntu 12.04 64bit VPS. So I am using the instructions here : ...
2
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1answer
56 views

Why does re-signing a message in bitcoin-qt produce a different hash

I just noticed that if you repeatedly sign the same message in bitcoin-qt, the signature changes. Why is this?
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1answer
396 views

How to make bootstrap.dat work with bitcoin qt

I have downloaded the bootstrap.dat torrent to make bitcoin qt synchronize faster. I have searched the bitcoin directory by writing in the Run Application "explorer %APPDATA%\Bitcoin" I have dropped ...
0
votes
1answer
26 views

Bitcoin-qt transaction not initiated by the wallet owner

I was just mining for some Dogecoins with Eobot and parallel I had BGFminer set on solo mining + 4 pools from eclipse. The issue is that the moment the Eobot kicked in (it started on mining Dogecoins ...
1
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2answers
67 views

Bitcoin-qt import private key crash

Importing a private using the debug console causes a crash, I always have to kill from shell the bitcoin-qt app and restart it. Is there any way to prevent this? Is there a way to import the private ...
0
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1answer
102 views

When do P2Pool Node Fees get paid?

I have set up a node and been running for a few days now and a couple of payments have gone out form it which is good. These payments are going to a coinbase wallet and there is a local wallet ...
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0answers
28 views

How does Core distinguish between confirmed & unconfirmed Tx in memory?

Looking for a low-level answer, links to reference code would be helpful: Is there a difference between a Tx message received from a peer, and a Tx item as included in a valid block received from a ...
1
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1answer
164 views

How can I convert a bitcoin public key to a bitcoin address?

How can I convert a bitcoin public key to a bitcoin address? Note: I am using PHP. Is there an existing bitcoin API or PHP-API to do that converting ?
0
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1answer
83 views

getrawtransaction doesn't work for every transaction with -txindex=1?

i put txindex=1 in bitcoin config and reindex blockchain after that when i call getrawtransaction for some transactions didn't exist in my wallet and work well like: [Working] getrawtransaction ...