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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Bitcoin private key import

I have several BTC private keys I need to import into wallet. & I keep trying to do this in block chain & it shuts me down... What am I missing or doing wrong Thanks so much
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10 views

What is the algorithm behind multisignature address?

I know you can create a multisignature address with the command: bitcoind createmultisig 2 ["pubkey1", "pubkey2", "pubkey3"] As described here: https://gist.github.com/gavinandresen/3966071 This ...
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27 views

Building bitcoind from modified “selfish” code - possible?

For a long time I've been trying to find out ways for running a "selfish mine" algorithm on bitcoind's regtest mode. Now I'm wondering if my plan is feasible, at all!? So I'll just outline my ...
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1answer
15 views

Rise difficulty in code, still no changes after rebuild

I'm playing around with the code and tried to adjust difficulty by changing code from bnProofOfWorkLimit = ~uint256(0) >> 1 to bnProofOfWorkLimit = ~uint256(0) >> 20 inside code block ...
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17 views

Getting error when starting bitcoind in regtest mode

I tried starting bitcoind in regtest mode but got the following error. Command : bitcoind -regtest -daemon Output : Bitcoin server starting Error: Invalid amount for -paytxfee=: ...
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42 views

How to make genesis block transaction spendable?

I read this question Why can’t the genesis block coinbase be spent? . It says because of some quirk (the genesis block coinbase transaction is not added to the global transaction database) genesis ...
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1answer
38 views

Bitcoind crashes directly after starting

I'm am trying to solo mine. My first problem is when I try to launch bitcoin client as server with guiminer I get this error Invalid -rpcallowip subnet specifications.* valid are a single ip. I ...
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37 views

How can I run bitcoind in pruning mode?

I read this comment: You could consider running a pruning node, which is practically the same as a full node (including security), except it throws away some of the old history. Version 0.11 ...
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1answer
68 views

Blockchain over 36GB and causing disk space issues

I want to install the bitcoind daemon on a computer with relatively little free space (about 35GB available). I thought that the blockchain was some 20 GB in size and figured that would be no problem, ...
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17 views

sendtoaddress() rpc-api call takes too long to execute

I'm developing web-application which utilises bitcoind rpc-api via https://github.com/sinisterchipmunk/bitcoin-client. Sometimes sendtoaddress call takes more than 30 seconds to execute, while other ...
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21 views

easybitcoin.php and bitcoind issue. Can't get balance of address. Need help

require_once 'easybitcoin.php'; $bitcoin = new Bitcoin('username','password'); $addy = '1HB5XMLmzFVj8ALj6mfBsbifRoD4miY36v'; $block = $bitcoin->getblockcount(); $block2 = ...
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1answer
24 views

how to execute Ubuntu shell for bitcoind command in php?

i want to build a bitcoin third party server for my client. but problem is that when i execute "bitcoin-cli" command using php then it didn't give any result. i used JSONRPCClient. but i didn't find ...
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41 views

I run bitcoind in linux centos server. but it give me error “sendto: Operation not permitted”. why?

root@srv [~/public_html/server/bin]# ./bitcoind -daemon Bitcoin server starting root@srv [~/public_html/server/bin]# sendto: Operation not permitted What is the problem? Also, bitcoind didn't ...
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29 views

Where is UTXO stored?

When a new transaction is received it is added to the memory pool (after checking for conflicts). While mining, only the transactions which are in the pool are considered. What happens to the ...
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1answer
23 views

won't show my balance by “getbalance myaddress” but show balance by “getbalance”. what is the reason?

i send btc in my-server created btc address. which is created by "getnewaddress". get the payment also and it's shown by "getbalance". but i want to see the balance by "getbalance myaddress". it's ...
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32 views

Which function is called to mine a block, broadcast the newly mined block & receive a newly mined block?

I am trying to understand the control flow and handling of transactions in the memory pool.
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35 views

Extract all public keys from blockchain [duplicate]

I want to extract all public keys from the blockchain. Those will probably mostly be keys that have been used to sign transactions. How would I do this?
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18 views

How to Create Wallet using createmultisig? How do use it? [duplicate]

createmultisig <'["key,"key"]'> what is "nrequired"?? what is "key"?? i use this and create a address: bitcoin-cli createmultisig 2 ...
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1answer
44 views

How can I mine bitcoin faster? [closed]

I'm curios what kind of PC, I need to mine bitcoins. What OS system, what GPU, CPU, etc... my current specification are: CPU: Xeon e3-1230v3 GPU: GTX 780 RAM: 24gb OS: Windows 8.1(64bits) So what ...
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1answer
29 views

How can I check if a bip32 xpub key is valid using python?

I'm on the hunt for some python code that will tell me if a string is a valid bip32 xpub key but I'm having trouble finding any. I also would like to check if a string is a valid bitcoin address. ...
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1answer
67 views

All Bitcoin Public Keys with non-zero balance

I want to get a database or otherwise retrieve a set off all bitcoin public keys (not addresses) that have non zero balances. What would be the easiest way to do that? Is there an API that could do ...
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31 views

How to start https and http call according to enviornments

I am using insight api's for block chain. I have installed an ssl certificate for secure connection. In development mode, all calls should be http; in production mode, all calls should in https. There ...
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1answer
40 views

Bitcoin.conf not being read by Bitcoin Core

My issue is I cannot get RPC working with Bitcoin Core. I do not know what I'm doing wrong! When I first installed Bitcoin Core it did not come with a bitcoin.conf file so I created one with the ...
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2answers
75 views

How to check BTC transaction when buying face to face?

I have never bought bitcoins face to face. Don't have iphone/ipad and therefore I would need answers on the following question: What do I need to have on my cell phone in order to provide seller my ...
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1answer
38 views

Taking control of the dynamic bitcoind tx fee

I'm running bitcoind for a service that works with quite small user withdraws most of the time. Recently I noticed that instead of the standard 0.0001 tx fee from the recent past, it already charges ...
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1answer
47 views

What is the most efficient way to store bitcoin addresses in a database?

Let's pretend I wanted to store 1MILLION btc addresses in mysql, I thought about saving the last 10 digits of each submitted address and testing against that but would 10 characters be enough to ...
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4answers
77 views

How to get unspents for a specified bitcoin address?

I want to access unspent data of a specific bitcoin address. I am trying this command bitcoin-cli -regtest listunspent "some bitcoin address" But I am always getting an empty list. I am using local ...
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1answer
19 views

Xemian Xchange Api for Java, returning a default of 100 market orders

For sometime I am using this java API http://xeiam.com/xchange/ for building bitcoin trading robots. Today I got a bit stuck and I wanted to see if somebody had the same issue before. I call the ...
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2answers
23 views

2 nLockTime TXs with same input

What happens if I broadcast two nLockTime transactions with different nLockTime but same input? Is the smallest nLockTime going to be accepted or is it the tx that reaches the network the fastest ...
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38 views

bitcoind inconsistent authentication error

I am using a Linux computer. The issue I am having is that sometimes I have to use "kill -s 9 (bitcoind pid)" and restart bitcoind using "bitcoind -txindex" because bitcoind will sometimes not let me ...
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40 views

jsonRPCClient.php states its served a 401 error response

When I execute my php file from the command line I get this: <pre> PHP Warning: fopen(http://...@127.0.0.1:8332/): failed to open stream: HTTP request failed! HTTP/1.0 401 Authorization ...
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31 views

Is there A Mechanism In Place that Prevent Address 'Squatting'? [duplicate]

Is there a function or mechanism in the bitcoin protocol that prevents someone from creating millions or billions of bitcoin addresses and just sitting on them? Do the addresses need a minimum balance ...
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44 views

Error While making windows.exe using gitian build?

Actually I'm making a logos windows exe (logosd and logos-qt) following the release process, which is mention on below path on any coin you can find that path, I'm working logos LGS Coin that's why ...
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2answers
41 views

Bitcoin (and other crypto-coins) nonce loop

I recently started to pay attention to what's going on at crypto-markets and, being developer for a long time, decided to take a look at the software we have out there in public access. So I have a ...
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2answers
36 views

How to get the input address from an txid with bitcoind

I want to get the input addresses of a transaction with a known id. If I use getrawtransaction I get something like: "vin" : [ { "txid" : ...
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listsinceblock returning block on fork

Im considering using listinceblock to monitor incoming bitcoins to my app. What happens if the block returned by listsinceblock ends up being on a dead-end fork?
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2answers
36 views

Can't post on bitcointalk.org

I've done some research and understand that I'm supposed to post in a newbie forum and wait a while, as a newly registered user. But I can't seem to find the newbie forum. Does anyone know which ...
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3answers
85 views

Any way to create a multisig address from Bitcoin addresses (instead of public keys)?

Any way to create a multisig address from Bitcoin addresses (instead of public keys)? If not, why not? What would the problem be? EDITED - Thanks for the answers. This is for an application that ...
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1answer
55 views

Bitcoind doesn't add miner fee

How do I make sure bitcoind's RPC call sendtoaddress adds miner fees to transactions? Tried adding to our bitcoin.conf file: mintxfee=0.0001 But some of the transactions still won't get any miner ...
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3answers
96 views

Testing blockchain forks

I want to test if a service can manage a blockchain fork. However there is no way to get bitcoind to create test forks under the regtest mode. I've tried modifying it to generate blocks with arbitrary ...
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68 views

How I make a portable version of Bitcoin for Ubuntu?

I want to create a bitcoin wallet executable file in Ubuntu with all its dependencies. So when use that file from some other system it will work perfectly. How I make a portable version of Bitcoin ...
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71 views

on testnet: 'transaction already in blockchain'.. but it isn't

At least I don't think so! I'm trying to create a wallet infrastructure to minimise fees, and so I've been experimenting with raw transactions. I'm quite clueless but fortunately have enough sense to ...
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1answer
30 views

Why does `connect` perform worse than `addnode` for synchronization?

I've manually set many nodes in my bitcoin.conf file via the connect= property. I can see that, when run, bitcoind connects to most of these nodes successfully. However, I never see any blocks being ...
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43 views

Pledging mechanism using Bitcoin

Is there an obvious way that I can achive the following with Bitcoin? An organizer sets a goal: an amount of bitcoins must be gathered within a specific amount of time Random pledgers send an amount ...
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1answer
158 views

Can I import my wallet from my bitcoin core for electrum?

Bitcoin-qt, now bitcoin core is insane. It consumes 40GB hard disk space. It hogs network. I am thinking of using Electrum or something like that. I want to use another bitcoin client. Electrum is ...
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2answers
53 views

Is an unencrypted wallet secure if bitcoind is not accepting RPC calls?

I'm interested in setting up a P2Pool node (which requires running bitcoind) to run a little mining pool for myself. Before you ask, nope I'm not even trying to break even, I know I'll lose money on ...
3
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1answer
71 views

Live Blockchain Backup

What is a good strategy for backing up bitcoind's blockchain files (not its wallet file) without having to take (e.g.) a bitcoind that is powering a counterparty-server instance offline? Copying the ...
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128 views

Error initializing block database. Do you want to rebuild the block database now?

I'm trying to set up a test network consisting of 3 nodes, each with different bitcoin.conf. I've constructed the directory and the .conf-files similar to what is the state of the art in ...
2
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1answer
72 views

watch-only addresses doesn't work properly in bitcoind v0.10.0

I imported a watch-only address to bitcoind by using below command: bitcoin-cli importaddress <myaddress> "testacc" true According to release notes it should support some rpc calls for this ...
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2answers
55 views

Sending from address to address in bitcoind

I'm programming the back-end for an ecommerce solution, Bitcoind API gives me one way of sending money to a bitcoin address: sendfrom <fromaccount> <tobitcoinaddress> <amount> If I ...