Questions tagged [bitcoind]
This tag should be used for questions related to bitcoind, the command-line software for Bitcoin Core. It stands for "Bitcoin Daemon" where a daemon is any computer process which runs in the background ("service" in Windows terminology).
288
questions
49
votes
3
answers
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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 ...
- 1,053
21
votes
4
answers
27k
views
How can I setup Bitcoin to be anonymous with Tor?
Bitcoin is billed as many things, among them its anonymity is highly regarded. While it is true that a transaction does not identify a user or wallet, recent news shows that there is the potential for ...
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22
votes
2
answers
18k
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How do I use walletnotify?
I have bitcoin daemon and I want to use the walletnotify option with a json-rpc call. Some of the examples use a "transaction.sh" file for walletnotify. What is it for?
What do I have to write in ...
- 501
21
votes
4
answers
16k
views
How can I create a multi signature 2-of-3 transaction?
Can somebody help me with step-by-step list of how to create a multi signature 2-of-3 transaction?
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13
votes
2
answers
7k
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How to findout the sender of a transaction
How do I find out which addresses are the inputs of a given transaction, given its transaction ID?
I know there is a way, as satoshidice.com uses this.
I would like to do this with own software and ...
38
votes
10
answers
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How to check if the block chain is up to date using bitcoind or json-rpc?
I read the full api method list and did not seem to find one.
I suppose there is no command specifically for that purpose, so what is the general way of doing this?
I would consider checking the ...
- 11.4k
36
votes
6
answers
47k
views
How to get an address's balance with the bitcoin client?
I want to see the balance of some address using bitcoind.
I set txindex=1 and did a -reindex to get all transactions indexed.
But still, there doesn't seem to be a way to get balances of an address. ...
- 11.4k
4
votes
3
answers
1k
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Why does Bitcoin uses a Script language?
From what I heard is that Bitcoin use Script to verify transactions (I'm probably wrong).
Wouldn't be sufficient just signing the transaction with the private key and append the signature to the ...
31
votes
5
answers
14k
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In getrawtransaction, what is the vout integer in the vin list?
I'm working on trawling the bitcoin transactions coming in via getrawtransaction.
I haven't been able to find the neccessary documentation to describe the vout integer in the vin array:
{"txid"=>"...
- 311
16
votes
3
answers
23k
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How to get all addresses - including the "change" addresses - from bitcoind?
I want to get all my addresses - including the auto-generated "change" addresses - from a running bitcoind somehow.
I haven't been able to do it in a simple way. "getaddressesbyaccount" and all the ...
- 2,645
14
votes
3
answers
7k
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What is a step by step way to insert data in OP_RETURN?
I was following https://bitcointalk.org/index.php?topic=453086.0
for creating a message in OP_RETURN. I am able to decode my raw transaction, but on signrawtransaction it gives
error: {"code":-22,"...
- 333
35
votes
6
answers
29k
views
How does one attain 1,000+ connections like blockchain.info?
At this moment, blockchain.info has over 1,900 nodes connected to their bitcoin client.
I have been running an m1.small ubuntu 12.04 server and bitcoind for ~4 days straight now with no reboots. My ...
- 857
16
votes
2
answers
8k
views
How do I detect a double-spend?
As a vendor, how do you detect a double-spend? I'm happy to tell end-users that I'm proceeding with a transaction on 0 confirms, simply assuming everything is fine. I'm selling physical goods and so I ...
- 163
15
votes
3
answers
5k
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Can Bitcoin-Qt be configured to trim the blockchain?
I run Bitcoin-Qt and Bitcoin Armory on a laptop. I don't have the space to store the whole 20 GB (or however big it is now) blockchain.
I understand the need to run through the entire thing for ...
- 313
11
votes
2
answers
7k
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 ...
- 1,753
9
votes
2
answers
4k
views
Is there a way to change the wallet.dat location without changing the entire data directory?
I know that Bitcoin supports the -datadir command line option which specifies that the wallet.dat and blockchain should be stored in a custom location rather than %appdata%\roaming\bitcoin but is ...
- 14.3k
6
votes
1
answer
2k
views
Get notified of incoming Bitcoin transaction, as soon as it broadcasted
After a few weeks of searching for an answer, I decided to ask here.
I want to accept a Bitcoin payment, to a specific wallet, and immediately, when the user approved the payment, to receive an ...
- 63
3
votes
1
answer
3k
views
How to get xpub or mpk(bip32) for my bitcoin core wallet?
I m not getting any such option in bitcoin-core Ui and documentation
http://bitcoindaily.org/bitcoin-guides/bitcoin-core-tutorial/
19
votes
9
answers
14k
views
How to check Bitcoind block chain download progress level
I have installed bitcoind on ubuntu server, and when I run screen -x for btc it says error -10 blockchain is downloading.
How do I know the progress level? currently 125600 blocks are downloaded, but ...
- 191
18
votes
2
answers
10k
views
What are the minimal system requirements to run a full Bitcoin node?
I want to build a low profile system running as a full Bitcoin node, i.e. just running Bitcoin Core 0.9+ and pretty much nothing else. What is the minimal system (in terms of power consumption) that ...
- 313
16
votes
3
answers
22k
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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 ...
- 586
13
votes
4
answers
2k
views
Does the original Bitcoin client scale to contain millions of addresses?
We use the standard client in our business. The wallet already contains about 25k addresses. Will the wallet remain stable after the number reaches 100k or a million addresses? I was told that all ...
- 3,158
12
votes
2
answers
4k
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What are the steps in building bitcoind on Mac OS X 10.6?
Following the instructions in build-osx.txt (which seem sadly out of date) leaves me without a file named libboost_system.a.
Here is how I built boost:
% cd boost_1_42_0
% ./bootstrap.sh
% ./bjam ...
- 121
11
votes
4
answers
10k
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>> ./...
- 171
7
votes
3
answers
10k
views
How can I export all my private keys using bitcoind?
I know that PyWallet has a -dumpwallet but without using pywallet, how can I export all the addresses and privatekeys with the stock bitcoind?
Is there an API command that lists all addresses held by ...
- 27k
7
votes
1
answer
2k
views
How can I find the "real" difficulty on testnet?
As is well known, testnet has a "20-minute rule": if no block is found within 20 minutes, the mining difficulty drops to 1 until a block is found.
From some experimentation, it appears that bitcoind'...
- 22.9k
5
votes
1
answer
2k
views
What exactly are the rev00000.dat files?
I've been looking at the on disk structured generated by the standard bitcoin-qt client. It looks to me that the rev?????.dat files are reverse application for blocks? So I imagine every single spent ...
- 520
4
votes
3
answers
1k
views
Format of a block key's contents in bitcoind's LevelDB?
I am trying to use bitcoind's LevelDB block index files (that are stored in blocks/index) to find the file (e.g. blk00029.dat) and byte position of specfic blocks.
Thanks to questions What is the ...
- 143
4
votes
3
answers
995
views
How can we access all transactions, including spent transactions, through bitcoind?
We are running bitcoind version v0.8.2-332-gf19eda1-beta.
Our goal is to parse all transactions in a given block.
To begin we call "bitcoind getblock ", which gives us a list of associated txid's.
...
- 81
4
votes
2
answers
3k
views
Insert data to transaction with OP_RETURN
This might be a possible duplicate with this.
I want to know a proper way to insert additional string with OP_RETURN and retrieve the transaction from block chain and decode it accordingly.
Thank ...
- 329
16
votes
1
answer
5k
views
Where is the UTXO data 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 ...
- 457
10
votes
2
answers
8k
views
Is there a light (SPV) version of bitcoin core (bitcoind)?
I'm trying to develop an SPV Bitcoin client which makes use of a library requiring bitcoin core (a running bitcoind service).
However, from what I understand, Bitcoin Core is full node, meaning that ...
- 642
10
votes
1
answer
5k
views
How does the bitcoin network recover in case of a hash collision in the block hash?
A Bitcoin client has to download the whole blockchain from the P2P network in order to become a full node.
A full node is able to determine, if a transaction in the network is valid or not.
To ...
- 225
8
votes
3
answers
2k
views
What's the best way for a website to detect payments from green addresses?
Does any proven third party code exist for this?
Edit*
To be more specific, what I haven't been able to find out is how to get the sender's bitcoin address when receiving a transaction. As far as ...
- 1,482
7
votes
1
answer
5k
views
Is there a way to find how many nodes are there?
As a single bitcoind node I can only detect how many connected peers I have. Is there a way to have a vision of the whole bitcoin network?
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6
votes
1
answer
3k
views
What are the debug categories?
In the bitcoin configuration you can set debug logging for the following categories. I can't seem to find an explanation of what each of these categories does. Can someone explain them or point me in ...
- 317
6
votes
1
answer
1k
views
How do I get the private key of an address in descriptor wallets? How to dumpprivkey?
When I run dumpprivkey from Bitcoin Core 0.21.1. I get the following error message:
error code: -4
error message:
This type of wallet does not support this command
I came across achow's explanation ...
5
votes
1
answer
4k
views
Transaction fees and transactions with bitcoin-cli. Wallet address balance negative
I'm trying to make a bitcoin website and I tried to implement a sort of 'withdraw' button which would allow you to send your money in the wallet address to some other address. The problem I am facing ...
- 103
4
votes
1
answer
4k
views
What are some commonly used commands for Bitcoind shell command line?
I just installed the bitcoind daemon on my ubuntu, but i was wondering what are some of the most commonly used commands for bitcoind?
Also is there a cheatsheet for this?
thanks
- 10.9k
3
votes
1
answer
5k
views
What is the maximum of receive addresses the default wallet can handle?
I guess there is no limit. But on tests, what is the maximum before the bitcoind start to slow down in a specific machine?
- 1,678
2
votes
1
answer
521
views
How to getheaders from blockchain?
I have run a full node on linux
now I can run commands with bitcoin-cli like:
bitcoin-cli getbestblockhash
it returns:
0000000000344240308f54ded700542571b3df9efe05fab92e669099e20e0d92
or
bitcoin-...
- 208
1
vote
1
answer
931
views
Create multisignature wallet from xpub keys in bitcoin core
I can create Multisignature wallet electrum with 2 xpub keys.
How can I create bitcoin core to do that?
Standart use;
Add a multisig address from 2 addresses
bitcoin-cli addmultisigaddress 2 "[\"...
- 13
0
votes
1
answer
193
views
Please i need help about BitlyCore.com [closed]
Please I need help. I want to know if anyone knows about BitlyCore.com I have been running the full block for days now and it's just stuck at 87% please I need help.
- 1
41
votes
2
answers
19k
views
When should I use -reindex-chainstate and when -reindex
What is the difference between the options -reindex and -reindex-chainstate?
Is one of the options faster?
When should each option be used?
- 583
38
votes
1
answer
38k
views
What is the difference between the rpc port 8332 and port 8333?
What is the difference between the protocol and commands used on default ports 8332 and port 8333?
From what I gather, port 8332 is the RPC port, it's "sensitive", only allowed by local host by ...
- 12.6k
24
votes
3
answers
30k
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?
- 341
22
votes
1
answer
22k
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What's the difference between bitcoind and bitcoin-qt? Different commands?
This is a multi-part question, mainly do to contradictory information from different articles. It's got me all confused.
From my understanding, bitcoin-qt is just a GUI version of bitcoind - which ...
- 275
21
votes
7
answers
18k
views
How to know if bitcoind synced?
I installed the bitcoind and started it as daemon.
After 10hours I've tried "du -h"
ubuntu@ip-172-31-37-93:~/.bitcoin$ du -h
16K ./database
59M ./blocks/index
29G ./blocks
646M ./...
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21
votes
6
answers
33k
views
Ubuntu Linux -- How do I start bitcoind as a service to run automatically?
I've got a bunch of other services set up to boot automatically when my Ubuntu server starts (services like wicd-daemon and VPN), but I can't figure out how to set up the bitcoin daemon (bitcoind) to ...
19
votes
1
answer
4k
views
How does the 'move' command work?
I have so far enjoyed the experience of learning about Bitcoins, mining, etc. I've setup a bitcoin daemon in hopes of developing a few apps and services in the near future. However, there is one thing ...
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