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

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90 views

In what respect is Bitcoin “programmable cash”?

In my local Bitcoin meetup, someone said Bitcoin is "programmable cash". Can someone please explain if and to what respect this is true? I read about a few BIP (Bitcoin improvement proposals) that ...
0
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2answers
38 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 ...
4
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2answers
1k views

ECDSA r, s encoding as a signature

An ECDSA algorithm when signing a given messages produces a pair of outputs, r and s. How, given a sigStr from a Tx can one extract r and s? Are they just concatenated byte arrays of a specific ...
0
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1answer
17 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 ...
5
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1answer
132 views

What is the schema of the data stores used by the reference client?

I'm interested in seeing the schema (layout and indexes) that is used in the reference client. Namely wallet.dat, the bk** files and also the in-memory uncommitted tx. Does this exist anywhere for ...
6
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1answer
473 views

What is “Key Splitting”? When would I use it?

Here is some github code to create split keys. Is Key Splitting the same as Multi Sig? What are the benefits of Key Splitting, what's it used for? How does it relate to P2SH or any other relevant ...
2
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0answers
69 views

What restrictions will be placed on X509 certificates that are used in the payment protocol?

I'm looking at BIP0070 and also this forum thread which is locked for some reason; so I'll post here. When it comes to validating a certificate for the purpose of a Bitcoin payment, each certificate ...
5
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2answers
2k views

Why does the initial blockchain download get stuck part way through?

I am trying to get Bitcoin up and running on a fairly underpowered laptop and Windows Vista using bitcoin-qt 0.5.0.1 . After installing and starting the program I am stuck at at the syncing stage at ...
0
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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 ...
4
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3answers
3k views

Can I remove the passphrase from my Bitcoin Wallet?

I'm using the standard Mac Bitcoin client and I added a passphrase. I'd like to remove that passphrase. Is that possible?
0
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1answer
33 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
21 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 ...
1
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1answer
59 views

Build Altcoin-qt, keep getting 'This application has request the runtime to terminate it in an unusual way' error

I successfully built my coin on my laptop using Qt4.8.6, but get this error when I try to solo mine it. I can solo mine, but the error pops up. If I click 'ok', it shuts the program down and I can't ...
1
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1answer
49 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 ...
4
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2answers
38k views

Where can I see my Bitcoin address?

I use the original client, but I don't know where can I find my Bitcoin address. Can someone help me?
4
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2answers
5k views

How to use the bootstrap.dat in Mavericks?

So I'm trying to sync with the network in Bitcoin-Qt, but I just can't seem to make use of the bootstrap.dat file that I downloaded, which is annoying because it will be awfully slow to sync without ...
1
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1answer
229 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 ...
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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.
0
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4answers
93 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 ...
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1answer
26 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
1
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1answer
50 views

descriptions of the bitcoin-qt files

bitcoin-qt creates files under ~/.bitcoin/ in my file system. i know that the ~/.bitcoin/blocks/blk*dat files contain the blockchain, but what do the following other files contain: ...
0
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1answer
99 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 ...
0
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3answers
911 views

What are the bitcoin dependencies for red hat linux? Bitcoin fails to compile

I'm using CentOS on my server, and when I try to compile bitcoin from the github source using make -f makefile.unix, I get a ton of errors. I'm assuming they're caused by dependency errors? I've seen ...
0
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1answer
38 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 ...
1
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1answer
257 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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2answers
74 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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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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1answer
178 views

Why bitcoind/bitcoin-qt is imposing transaction fee?

bitcoind is imposing a transaction fee of 0.0001 BTC forcefully even though I have set "transaction fee" to 0. Is it possible to transfer BTC to an address without paying a fee? If so, how?
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2answers
893 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
79 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 ...
4
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2answers
1k 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: ...
0
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2answers
501 views

How to import old wallet to Multibit?

I had 2 Bitcoins on my old PC and got a virus so did a format. But I also did a backup of my bitcoin wallet. Now I want to sell these bitcoins but when I went to the site, the official client was ...
2
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1answer
55 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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3answers
1k 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 ...
0
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0answers
54 views

How can I request balance of bitcoin address from Bitcoin-Abe using PHP?

I installed Bitcoin-Abe. How can I request balance and transactions of specific Bitcoin address from Bitcoin-Abe using PHP? Is it make by query database or what? How can I deal with Bitcoin-Abe to ...
0
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4answers
133 views

Error compiling altcoin-qt for Windows, getting a GCC internal compiler error

I think I managed to get all my dependencies and libraries right (fingers crossed), but now when trying to build blackcoin-qt, the QTSdk compiler gives me this error while building qtipcserver.o: In ...
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 ...
1
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1answer
80 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 ...
0
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2answers
125 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 ...
2
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3answers
393 views

My bitcoin transaction has not yet gone through. (4 days)

I have googled this problem and everyone just keep saying "be patient it will get through sooner or later". Well it has now been 4 days and it still says 0/6 confirmations. I did not send it with a ...
0
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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 ...
2
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1answer
68 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 ...
9
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1answer
2k views

How to get a bitcoin address's balance?

I know blockchain.info has an API: https://blockchain.info/q/addressbalance/134dV6U7gQ6wCFbfHUz2CMh6Dth72oGpgH gets the bitcoin address's balance,but it's not open source and must connect to the ...
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3answers
613 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 ...
1
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3answers
2k views

get Armory to use an existing blockchain?

I'm trying to set up Armory but it wants to download the whole blockchain. The thing is I already have the blockchain downloaded on the same machine for bitcoin-qt. Is there any way to get Armory to ...
3
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3answers
11k views

How to resolve “no block source available” and

I've got some trouble using bitcoin-qt. It stays on: " No block source available... 242 weeks behind." And " Catching up ... Processed 0 " etc... Map port using UPnP is activated, and proxy disabled ...
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2answers
1k views

How to export public key for an address in bitcoin-qt?

With the probable increase in demand for multi-sig (P2SH) addresses, and since the procedure for creating such addresses requires that each participant provides the uncompressed public key for an ...
1
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1answer
33 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? ...
0
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0answers
34 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 ...
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2answers
894 views

Do you need to download the entire blockchain in order to mine bitcoins?

Do you need to download the entire blockchain in order to mine bitcoins? I'm downloading bitcoin-qt, and I'm afraid it will take up too much memory on my computer. Also, I just read that when another ...