bitcoind is the command-line interface for Bitcoin. It stands for "Bitcoin Daemon" where a daemon is any computer process which runs in the background ("service" in Windows terminology). bitcoind connects to the Bitcoin network and passes transactions, updates the block chain, etc.

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How can I rsync my bitcoin database?

I would like to use the bitcoind daemon but I don't want the high CPU footprint related to validating blocks every time new blocks come in. There is a better equipped computer that I can rsync with, ...
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2answers
27 views

Why could UpdateTip be taking so long?

It has been 10 days since I ran bitcoind. When I opened it yesterday, I waited for about 40 minutes during which I could do not much except for waiting because my computer became so slow (high CPU ...
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12 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 : ...
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21 views

Building from Source on MAC OSX 10.9 Error

Hi i'm building Bitcoin from source and am having some problems. Curious if anyone would be able to help me. When I try to make I get: In file included from ./json/json_spirit_reader_template.h:9: ...
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1answer
21 views

Building Bitcoin from Source on MAC OSX 10.9

so I'm trying to get bitcoind running on my Mac and I cloned the source code from github. What I tried doing: brew install autoconf automake berkeley-db4 boost miniupnpc openssl pkg-config protobuf ...
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1answer
47 views

what IS Bitcoin's pourpse and what do they need me to do and why do they need me to do it and what is said thing for? [duplicate]

this program is advertiseing btcoins but not eplaining what they want to pay me to do and why dos it need to be done? its running algorithms but what is it doing that for? is it trying to protect ...
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1answer
28 views

Transfer wallet to new server

I have been running a bitcoin app in an old server. I need to move everything to a new server but my question is this: is there a way I can transfer my bitcoin wallet (bitcoin core) to the new server ...
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3answers
65 views

How To Lower The Disk Space Needed For Full Blockchain?

I'm looking to run bitcoind on a virtual machine. However the main nets Blockchain size is over 21GB, and growing. Is there a way to compress this down or lower the amount of disk-space needed for ...
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25 views

JSON-RPC “couldn't connect to server” via bitcoind CLI (curl works fine)

This is an odd one. I am running bitcoind 0.9.1 on Ubuntu 14.04 and have this behaviour: Doesn't work: $ bitcoind getinfo error: couldn't connect to server (timeout after 30s) Works fine: $ curl ...
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1answer
29 views

how do devs upgrade bitcoin core without affecting the live active network?

I've always wondered, how do devs developing on Bitcoin upgrade the system without affecting the live network? We typically see a site under maintenance when big companies revamp their site, but how ...
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1answer
27 views

how to config p2pool so that it can connect to bitcoind wiht HTTPS?

Now I have installed bitcoin with config rpcssl=1, and I have tested the connection with a java application. Everything seemed OK. Then I installed p2pool, and tried to connect to bitcoind (python2.7 ...
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1answer
92 views

Who controls the features added to the bitcoin network?

I read an article on cryptocoinsnews about sidechains and they said bitcoin can implement new features but any bugs would be dangerous to the whole bitcoin network. What I don't understand is who ...
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1answer
36 views

bitcoind synced more blocks than in the blockchain?

I just installed bitcoind on a fresh Ubuntu server and synced. However, it seemingly have synced more blocks than there are in the blockchain! $ bitcoind getblockcount 309905 $ curl ...
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14 views

How to do p2pool math

currency users! I running p2pool with multiple currencies and I would like to know how to calculate minimum hash rate needed per worker to solve share. Cause some miners not gathering predicted ...
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2answers
23 views

enable bitcoin SSL error

I want to enable SSL on windows.So I download a shining light openssl binary,and then I create server.pem and server.cert using the following commands: openssl genrsa -out server.pem 2048 openssl ...
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21 views

What is an account label, and how do I use getaccountaddress?

I'm having a hard time finding documentation on how getaccountaddress works. Am I supposed to pass it a bitcoin address, or a text label? If a label, where is this label stored? If someone could give ...
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0answers
14 views

Is there someway to determine the current network fee from the bitcoin network/daemon?

Is there some way to programmatically extract the current consensus of the transaction fee from the bitcoin network, either by using the daemon or through some other means?
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1answer
55 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 ?
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1answer
26 views

Create custom Transaction ID using Bitcoind raw transaction

I would like to know if it's possible for someone to create a raw transaction using bitcoind or bitcoinJ and predict the Transaction hash.How exactly is the transaction ID(hash) calculated ?
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29 views

403 error from localhost for any RPC call

got back from 3 days on the road. before I left I had no problem with RPC calls on my netbook running bitcoind. now I get 403 errors for everything: jcomeau@aspire:~$ bitcoind getbalance error: ...
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1answer
25 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 ...
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How can I define the change address of a transaction using createrawtransaction?

This question is almost the opposite of How to find the change / sender address given a txid? If I am making a transaction using createrawtransaction how can I define the change (sender) address?
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2answers
40 views

How to find the change / sender address given a txid?

Suppose I'm making a service like SatoshiDice and when I receive a transaction I want to give some money back. Where can I find the sender address? If I run this, e.g.: bitcoin-cli gettransaction ...
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21 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 ? Can someone explain how can i ...
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2answers
56 views

How can i get balance of bitcoin address not exist in my wallet?

How can i get balance of bitcoin address not exist in my wallet ? I try to use bitcoin-Abe but it is complicated and take seral days to full database with blockchain. Is there exists other tools ...
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1answer
33 views

What does UpdateTip mean?

Example the debug log: 2014-06-27 12:59:10 UpdateTip: new best=00000000000000002a03b175f183c3bbc440f5c2a171e958bfd504582f711f70 height=308004 log2_work=79.405055 tx=41447698 date=2014-06-27 ...
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2answers
74 views

Multisig doesn't work unless all keys were generated from the current wallet?

I tried to create a multisig in both the Bitcoin network and the Bitcoin testnet. It seems to work only when all public keys are from the current wallet. That means when I call listunspent after I ...
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0answers
13 views

getblocktemplate not returning coinbasetxn

In a simple 3 node regtest mode setup getblocktemplate does not return 'coinbasetxn' even when passing in the capabilities string with coinbasetxn set. I do get a coinbasevalue and coinbaseaux field. ...
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14 views

Unexpected coinbasevalue in regtest mode

Running a simple local setup with 3 nodes in regtest mode. Getblocktemplate tells me the coinbasevalue = 25 bitcoins but the block height is only 202. Shouldn't the coinbasevalue = 50 bitcoins?
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1answer
54 views

Bitcoin is not connected in regtest mode

I am having trouble using regtest mode on Linux. Using pre-compiled version 0.9.2.1 for linux and starting regtest mode as instructed on bitcoin.org: <bitcoin-ver>-linux/bin/64>> ...
2
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1answer
25 views

Where is the exact code part of the walletnotify function?

I'm new on the BTC project, so please spare me if I asked something newbies. I downloaded the latest 0.92 BTC source code and trying to make a customize to the walletnotify function for myself while ...
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1answer
33 views

How to handle return address Output field using bitcoin bip 70?

More specifically, how do I derive the return address from the Output field in a protocol buffer Payment object? I can convert the serialized byte string from the 'script' field of the Output into a ...
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16 views

GetBlocks Message containing Transaction Hashes

I'm sending a getBlocks Message which returns me an Inv Message containing up to 500 block-hashes as specified in the Protocol Specification. The Specification says: The maxium count for a an ...
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49 views

What is the best way to implement withdrawal in online service?

Suppose we have a service, which holds user balance in Bitcoin. How to implement withdrawal from bitcoin perspective? Which RPC call to use? How to archive transaction to have a proof of sending ...
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0answers
95 views

Custom altcoin won't sync with node and neither will accept a miner connection

I forked the BlackCoin source, changed the ports, generated the genesis block, merkle, blah blah blah. I set up a node on a DigitalOcean server and compiled my coin daemon there as well as on my local ...
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1answer
26 views

Priorities in Bitcoin-qt Client

On the bitcoin wiki its says: Transactions need to have a priority above 57,600,000 to avoid the enforced limit (as of client version 0.3.21). This threshold is written in the code as COIN * 144 / ...
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1answer
52 views

what is Create wallet using blockchain api (PHP)

Im wondering to know, what is use of Create wallet programitically Block chain API Block Chain api here What it will provide? Where can i get the api code? Any tutorials ? Can i provide my ...
2
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1answer
55 views

How to receive and manipulate a bip 70 payment object in django python?

I'm trying to check to see if the variables are being set correctly by the client and being received correctly by me. I'm new to proto buffs and django and my code below doesn't seem to be working. ...
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1answer
53 views

Help me work out a transaction fee

I am having difficulty working out how to work out a transaction fee. I've read the theory, but don't understand how to get the values to put the theory to practice. Can someone please help me work ...
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1answer
129 views

What is chainwork?

If I run the RPC call getBlock on the bitcoin-qt client it gives me field called chainwork containing a hash. I cant find any information what this value is about. Request: getblock ...
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2answers
45 views

Can I pass values over a bitcoin bip 70 URI?

is it possible to add arguments such as BTC amount to a bip 70 URI, something like: bitcoin:?r=http://127.0.0.1:8000/paymentobject/?amount=10 I already tried with the backwards compatible URI: ...
2
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1answer
23 views

Prompt user for payment amount using bitcoin bip 70?

When specifying the details for the payment object I have noticed that if I leave amount blank I am not prompted to enter an amount by the bitcoin-qt 0.9 client. xpd = x.PaymentDetails() xpd.time = ...
2
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1answer
33 views

Where can I get the source code of Bircoin or ANY other cryptocurrency compilable in Visual Studio?

I really want to study the source in detail. I'm using windows so can't compile the source on Github. I found one here : http://bitcoinqtmsvc2012.codeplex.com/, but couldn't get it to compile even ...
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1answer
77 views

Calculate tx fees before sending with sendtoaddress

I see this question time and time again, but I only find answers for calculating the fees in creating raw transactions. I am using sendtoaddress and would like to be able to calculate the tx fee ...
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0answers
31 views

why does listunspent empty?

When i make lisunspent command on Bitcoin RPC console show me empty {}, but i have coins in my wallet. Why listunspent is empty ? and how can make lisunspent contains transactions ? Thanks Editing: ...
4
votes
2answers
152 views

How to receive payments online to single address per user in scalable way?

Suppose we are building online casino/market and want to receive payments. To be scalable, safe and have good user experience, we: cannot generate new address for every single payment. Having ...
6
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1answer
97 views

How do exchanges decide on cryptocurrency trading pairs?

Cryptocurrency trading pairs for example ltc/btc, doge/btc should be paired using some criteria. I'd like to comprehend on what basis they are paired.
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24 views

Can't get armory to work

When I try running armory, it seems to download the block change and actually gets to 0 blocks, but then all of the sudden, armory disappears. Anyone know why this is happening? In the log file, I ...
2
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2answers
70 views

Broadcast raw transaction without input validation

What tool/software can I use to broadcast a raw transaction, which would not reject a transaction because of invalid or double spend? Bitcoind with RPC has a validation step which rejects any raw ...
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1answer
58 views

How to remove a transaction from the memory pool

Using Bitcoind and Json-RPC, how to remove an unconfirmed transaction from the memory pool? The scenario being removing the unconfirmed transaction because it's not getting confirmed, and it's ...