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).

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1answer
51 views

How would you create child pay for parent in bitcoind-cli

I have unconfirmed transactions in my bitcoind wallet. Some of the are mine and some are incoming third party transactions. I want to speed up their confirmation by creating CHPFP transaction - ...
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1answer
38 views

Permission denied when attempting to backup wallet using backupwallet

When I call bitcoin@raspberrypi:~ $ bitcoin-cli backupwallet "backup.dat", I get the following error: error code: -4 error message: Error: Wallet backup failed! ~/.bitcoin/debug.log shows ...
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Is it possible to change private key

I would like to know if it's possible to change private key of bitcoin wallet via rpc call to bitcoind. Thank you for your answers
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1answer
230 views

Is it actually possible to install Bitcoin full node on a Raspberry Pi 3B+?

A Raspberry Pi 3B+ has only 1GB of ram and this official Bitcoin Core page shows that minimum requirement is 2GB ram and 200 GB storage with 100MB/s read and write speed. But I see a lot of articles ...
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1answer
72 views

Is Bitcoin Core required for wallet projects?

My team wants to create a cryptocurrency service provider platform to Sell/Buy BTC and something else in form of web/mobile app. It's about one month that I have been studying different articles about ...
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1answer
32 views

how does node validate scriptSig

Let's say I sent some BTC to Bob, so I created a transaction (forget about scriptPubKey) since let's say I was able to prove it by executing scriptPubKey. so After I sent BTC to BOB, new transaction's ...
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1answer
49 views

Change difficulty using bitcoin-cli/bitcoind in regtest mode

Is there an RPC command which would allow me to generate blocks under a given difficulty? For instance, I would like to do something like this: bitcoind -daemon -regtest bitcoin-cli -regtest ...
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1answer
98 views

Error while syncing with the blockchain on my Raspberry Pi

So I already have the node set up on my raspberry pi. This night the transfer of the Blockchain from my laptop to the raspi's hard disk finished. Now I am waiting for the blocks to match the headers "...
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1answer
80 views

Can I send BTC from other node or wallet with my address?

I'm trying to send bitcoins from node2 with my address using private key noted that my address is created in node1.I followed this link: "https://en.bitcoin.it/wiki/How_to_import_private_keys" I dump ...
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1answer
22 views

Bitcoin Core ZMQ “hashTx”

Bitcoin Core ZMQ messaging system has hashtx along with 4 other topics. But nowhere it is documented whether the transactions that comes from hashtx are confirmed transactions which are added in a ...
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4answers
181 views

How bitcoin application in production retrive UTXO's

AFIK, UTXO of an address cannot be retrieved using bitcoin-core, without importing the address in the wallet. How are application in production able to get UTXO ? Does all the application use ...
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1answer
100 views

Where is the bitcoind executable on Windows 10?

I have installed bitcoin core 0.17.1 version windows 10 in my laptop. I can see the following folders: bin (bitcoin-cli.exe, bitcon-qt.exe, bitcoin-tx.exe, test_bitcoin.exe), include (...
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1answer
2k 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 ...
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0answers
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Score value of my node is not rising

I'm running Bitcoin Core 0.20.1 in Debian Buster. I run the daemon behind Tor network. My current settings are: /etc/tor/torrc SOCKSPort 9005 ControlPort 9501 HiddenServiceDir/var/lib/tor/bitcoin-...
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1answer
22 views

Difference between bitcoin-cli getnetworkinfo version and bitcoind --version

I tried to upgrade bitcoin core from 0.18.0 to 0.20.0. When I ask for the version through bitcoind bitcoind --version it prints Bitcoin Core version v0.20.0 but if I ask for the version through ...
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1answer
43 views

How to connect a bitcoin node to a complete node through the local network?

I currently have a full bitcoin node on my local network and I would like to create another node but only update it by local network. I have tried with: ./bitcoind -connect<iplocal> ./...
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1answer
49 views

2-of-3 multisignature account with limitations on withdrawal

I want to create a 2 of 3 multi-signature account from where one can withdraw money only after a certain period of time. How can this be done?
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2answers
1k views

Debugging bitcoind

How do you attach a gdb to a bitcoind daemon. I wish to step through the functions. Here is what i have tried. gdb --args bitcoind -regtest -daemon This however exists when the daemon starts. So i ...
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2answers
130 views

What are the web3py equivalent for communicating with bitcoin in Python?

I am fairly new to working with Python, I have a requirement where I need to perform some basic bitcoin operations on my local system rather than relying on some external API's, those function mainly ...
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2answers
32 views

what does segwit remove?

It's said that Segwit removes signature data from transactions which makes block have more space for more transactions. Question 1) If SegWit removes signature data, where does it put it exactly ? ...
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0answers
20 views

how does node remove conflicting transactions from memory pool?

Sorry for the long text. This is just my observation and was wondering if you could let me know if I am correct or not. Case 1) Let's say minerA and minerB both have the same transaction in their ...
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1answer
65 views

how does node create UTXO from blockchain for the first time?

Let's say I am a new node. I try to synch with the full node to grab the whole blockchain. Now, I synced with it .It's time for my node to create UTXO database .. How does it do this exactly so that ...
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1answer
48 views

Derived address different from CLI to NodeJS

Basically I'm trying to create a system in which each user has it's own address to deposit on the site, however I'm having issues with monitoring addresses as they appear to be different results ...
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2answers
21k views

What is rpcuser?

Can I just make up a value for rpcuser/rpcpassword in bitcoin.conf? Or do I have to set one up somewhere?
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2answers
1k views

Installing bitcoin and bitcoincash on same server

I have installed bitcoin core by using its source code in my amazon server by using the instructions given in the below youtube link https://www.youtube.com/watch?v=tG_24G7bj_w Some portion of the ...
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1answer
20k views

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 ...
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1answer
15 views

Add wallet feature to bitcoind (full node) after installation with --disable-wallet

I installed bitcoind with this configuration: `./configure --without-gui --disable-wallet` However, after it finished downloading the blockchain for a week, now I realize I actually do need the ...
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0answers
35 views

How do you correctly expose the RPC port with bitcoind running in WSL2-backed docker?

I'm trying to run bitcoind in a docker container backed by Windows 10/WSL2 using Docker Desktop. I'm using the ruimarinho/bitcoin-core:0.20.1-alpine image defined here: https://github.com/ruimarinho/...
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2answers
120 views

Providing Liquidity in CryptoCurrency Exchange!

Can anybody give some idea about the issue of providing liquidity to the users for creating a cryptocurrency exchange ? Thanks!
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0answers
43 views

Bitcoin “scantxoutset” rpc command return response too slow

For one of our decentralized mobile wallet, We need to fetch balance of imported BTC address quickly. After lot of research on google then I found Bitcoin deamon rpc command "scantxoutset", ...
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2answers
270 views

how to set the transactions fee using the RPC call?

I am creating the web wallet for the bitcoin , I want to allow web wallet users to set the transactions fee . Is their is any rpc call available for setting the transactions fee (for setting ...
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1answer
37 views

how does bitcoin's 6 confirmation really help?

I've read the following: transaction is “confirmed” once it is buried 6 blocks into the blockchain. This is taken to be a sufficient proof of work such that reversing 6 blocks to double spend coins ...
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1answer
32 views

how does GHOST protocol really work?

I am trying to wrap my head around GHOST protocol... I know it's too much to read, but not my fault. It's GHOST that's complicated (i guess) As I read, it's said that: instead of a longest chain ...
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2answers
143 views

How to replicate getaccountaddress behaviour using getnewaddress and labels api

The problem is getaccountaddress is getting deprecated and it has specific behaviour (not related to accounts) I'm relying heavily on. It gives you the same address between multiple calls as long as ...
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0answers
21 views

easybitcoin.php get transactions with 0 confirmations

i use easybitcoin.php (JSON RPC) script for generating and checking addresses, and i have a problem because i cant get incoming transaction with 0 confirmations, it is any way to show this using ...
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2answers
348 views

Import private key to bitcoind

I have a bitcoin testnet account in copay wallet. I want to import its private key in bitcoind. So, I exported the private key, but they were encrypted. I got a Test-Copaybackup.aes.json file. ...
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2answers
1k views

Is 8 the maximum number of incoming peer connections?

The reference here for running the bitcoin daemon does not really clarify what maxconnections mean. maxconnections= Maintain at most connections to peers (default: 125) Is this the max connection ...
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1answer
78 views

Prompting an account name

I made an account "hello" in bitcoin daemon and wanted to run this. Whenever i put in hello when prompted, getac1 would return empty array; whereas, getac2 and getac3 returns addresses associated with ...
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1answer
32 views

how does bitcoin know which one is utxo? [duplicate]

Let's say John gave 5 BTC to me. So, John took his unspent outputs and put it into inputs to create a transaction. Let's say John already had a transaction which was holding exactly that amount of ...
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2answers
89 views

Launch bitcoind at startup on Ubuntu

I have bitcoind installed on my VPS runing Ubuntu 18.04, and I want to configure it to launch bitcoind on startup. What the best way to do so with my configuration ?
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1answer
1k views

Bitcoind Node crashes after using -dbcache option

I've been trying to speed up my node sync by increasing the dbcache. However my node tends to crash overnight. My system is running ubuntu 18.04, 4GM of ram bitcoin core v0.18. I've tried bitcoind -...
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0answers
19 views

ElectrumX returning 0 balance

I have a running full bitcoin node (txindex=1). I also setup electrumx and it has fully synced with current blockchain state. Here's the log : INFO:LocalRPC:[2] RPC 127.0.0.1:44806, 0 total ...
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1answer
153 views

bitcoind: cannot obtain a lock on wallet directory

Hello fellow bitcoiners, I have a very annoying and mysterious issue with a bitcoind install. I had a blockchain corruption/stuck at some point. I deleted the old blockchain and copied an up-to-date ...
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3answers
12k 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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1answer
1k views

bitcoind sendfrom with minconf=0

Is it possible using bitcoind JSON-RPC API to receive funds from someone and send it immediately to another third-party address? I do not want to wait for 1 confirmation. getbalance with minconf=0 ...
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1answer
104 views

json-rpc of bitcoin not working for testnet(curl command)

I am trying this command to get transaction from bitcoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/...
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0answers
17 views

Insight package: Cannot connect to local nodes on testnet

I have a local blockchain network based on bitcoin that runs on my local machine. I updated the bitcore.config.json file to support my nodes. When I'm trying to see the blocks at the browser at ...
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1answer
171 views

using rpccookiefile instead of username and password for antminers

I mine using username and password at the moment but as bitcoin core is changing over to rpccookiefile. My question is, if i use rpccookiefile how do i point my antminers to my local bitcoind 'pool' ...
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1answer
1k views

json_rpc_call solo mining with bitcoin running on Windows 7 for antminer

I setup BitcoinD on a Windows 7 PC. I configured for defaults except user/pw and rpcallowip=192.168.1.0/255.255.255.0. have also tried 192.168.1.* with no luck. I ultimately want to use an Antminer ...
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2answers
144 views

How do I configure a port in my .conf file?

This is what my conf file looks like: prune=600 maxconnections=12 maxuploadtarget=20 rpcuser=user rpcpassword=password keypool=10000 server=1 [main] rpcport=5040 Whenever I run this from the command ...

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