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Questions tagged [bitcoin-core]

A full node implementation of the Bitcoin protocol with a GUI and a wallet. Bitcoin Core is a MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client".

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Bitcoin core wallet shows a wrong balance

after downloading and running bitcoin core v24.0.1 I connected to Sparrow wallet which in turn was connected to a Ledger hard wallet. Here is the problem: after bitcoin core did the rescanning the ...
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Is there such a bip32 function?

I have this code: const bip32 = utils.BIP32Factory(utils.ecc) const mnemonic = utils.bip39.generateMnemonic(256); const seed = utils.bip39.mnemonicToSeedSync(mnemonic); const masterNode = bip32....
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Import BitcoinCore's blockchain into bitcoinj

I'm a newbie in bitcoin. I've started programming some software using bitcoinj to make some transactions in bitcoin's testnet. But there is a huge problem I faced with. I cannot normally download the ...
nop's user avatar
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How do I verify Bitcoin Core’s integrity?

I'm trying to verify release signatures, but I have no idea how. It says to open a terminal window, and every time I do, I have no idea what to type. I’m using Windows. I downloaded the Bitcoin Core ...
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Could the Bitcoin Core descriptor wallet recover and start spending UTXOs by only scanning the UTXO set?

In the case where you import a previously used BIP32 seed into a Bitcoin Core descriptor wallet, at the moment if I understand correctly, the only way to recover the UTXOs and spend them is by first ...
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Bitcoin-core not saving transaction data

I have installed Bitcoin Core for full node and the synchronization seems to have finished, but there seems to be no transaction data saved on my PC storage. Why is this? Hopefully it should be ...
Luke's user avatar
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How do I view Multisig Trades using bitcoincore?

For a school project my goal is to go analyze multisig trades, is there a way where I can make this information any more clear to me? I have been running bitcoincore as a way to get trades that I can ...
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Why can't I connect to my Node? (on MacBook)

I just got a Bitcoin Core node running on my computer. The next thing I wanted to do is connect Sparrow or Specter to it. But none of them are able to connect. What can I do to make sure it's not my ...
bluefuze's user avatar
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Importing BIP-84 keys to Bitcoin Core or similar?

I generated a mnemonic and keys using the BIP-84 scheme and sent funds to a public address from that scheme over time. I have been using this as a paper wallet, unattached to any wallet software. I ...
bbuck's user avatar
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Obtaining balance/UTXOs of an address from Bitcoin Core, blockbook, or some other solution

In my application I would like to obtain the balance and UTXO set of some Bitcoin addresses. I'm primarily looking to achieve this using a full node (Bitcoin Core, RPC), but I am also open to other ...
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bitcoin-core building disabled binaries

good day, I have just tried upgrading to core 24. As I am looking for a purely headless bitcoin-core, my process was the following rm -rf bitcoin git clone https://github.com/bitcoin/bitcoin.git cd ...
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How can I tweak a private key in bitcoin core

I'm wondering what the workflow is for building tapscripts. I can generate a new address, but how do I tweak it with the tap script? I've done the bitcoin taproot workshop a couple times now and ...
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Unable to start BitcoinCore: Unable to start HTTP server. See debug logs for details

After long time of not running Bitcoin Core I ran it and got: Config file was: # server=1 tells Bitcoin-QT to accept JSON-RPC commands. server=1 # You must set rpcuser and rpcpassword to secure ...
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Active vs inactive bitcoin nodes

The protocol documentation states "The typical presumption is that a node is likely to be active if it has been sending a message within the last three hours." Does this mean any message ...
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Bitcoin Core: estimated time to synced, without GUI

I enjoy how the Qt program reports how much time remains to complete the chain synchronization, but I don't know how to get that without using the GUI. Can you configure bitcoind to report that? Can ...
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BlockCypher API signature bitcoin transaction Error

I'm trying to make a bitcoin transaction using the BlockCypher API and I'm getting an error when I try to sign the transaction. This function creates an unsigned transaction: def buildTransaction(...
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Can Bitcoin Core Blockchain initial sync time in BitcoinQT be sped up?

Given the following platform hardware and internet data speed (provided below), what settings are recommended for fastest possible blockchain download and sync? This is the hardware I'm running: Note:...
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Could someone share with me some documentations or sites on how to set up a custom signet using bitcoin core?

Recently I am going to use bitcoin core to set up a custom signet on my docker. I have read some implementations on wiki, but I had some problems when starting up a custom signet. One of the problem ...
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Understanding bitcoin merkle tree construction at code level

I have a high level understanding of how merkle trees are constructed for a Bitcoin block, but I am interested in building a little CLI tool in golang that actually takes a list of transactions for a ...
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Solution for P2SH non-standard derivation paths

Creating P2SH (Nested Segwit) addresses from an imported BECH32 (Native Segwit) XPUB, when running Bitcoin Core (pre-2020 software) wallet (as watch-only, with private keys disabled) can lead to non-...
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How to calculate modulo (%) of bitcoin publick key?

Good day. How to calculate modulo (%) of bitcoin publick key ? Absolutely any methods are welcome, please. Br
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Limit in adding Watch address in bitcoin core

Is there any limit in adding number of watch address to bitcoin wallet? Am thinking of adding thousands of address to watch list. If i do so what are complications we may face, performance impact?
itsdsp's user avatar
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How to run Bitcoin Core and what folders to move to my second VM after having it successfully running on my first VM?

I've Bitcoin Core v22.0 running smoothly on my first VM. Now I want to have Bitcoin Core up and running on my second VM but without syncing the blockchain from scratch as I did with the first VM to ...
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How do I set up my S9 and full node for solo mining?

I keep seeming to get round about answers about this. I want to begin mining to my local general-use machine which acts as a node as it hosts the blockchain (aka.BTC-core). I HAVE an ASIC S9. I need a ...
Fred Hamilton's user avatar
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Is there a way to sync bitcoin core without verification?

As the question asks, is there a way that one could sync the bitcoin client without verifying all the blocks. During IBD, downloading the blockchain isn't the bottleneck, what takes time is verifying ...
Rattle's user avatar
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Does Bitcoin-Core sanitize all accesses to DataDir?

I run core in -disablewallet mode, but keep my datadir on a secondary storage volume, which isn't as secure as my primary drive. Is this an attack vector? Could someone stuff some data-bomb in one ...
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Low cost option to run Lightning node in Cloud

I like to run a Lightning node and need some inputs. Providing Internet, Electricity 24*7 to my home system/Raspberry (Umbrel setup) is super challenging in my place. Like to know if running pruned ...
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Can't query own node

I'm trying different ways to query my own bitcoind node on testnet but I'm failing every time. Tried using bitcore's API and nodejs: async function tryBitcoin() { const data = await axios.get('...
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Can't sync to Bitcoin Network

I'm a newbie to this community. I have been trying to download all the blocks and be a full node, but I cannot connect to peers. I checked my firewall and there seems no problem, and tried to add node ...
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developing hd wallet using bip32 and bip 39

I'm developing a HD wallet using C#. I want to use this wallet for multiple blockchains like bitcoin, ethereum, dogecoin etc... I've read that I should use bip32 for my wallet. i know what's bip32 but ...
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Corrupt block found indicating potential hardware failure; shutting down

I am experiencing issues with both Bitcoin Core 0.20 & 0.22 on my 2020 iMac per the title. I have run diagnostics (shutdown and +D) and on black startup screen it says "No Issues found. ...
J J's user avatar
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Deriving children of a 2-of-3 multisig address with 3 xpubs as the starting point

I want to derive the children of a HD Multisig address using each of the xpubs following BitGo specs, currently, I have 3 xpubs and can get to the point where I can derive main address very similar to ...
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Cannot compile depends library- bitcoin v0.21.0

I'm trying to compile the depends library of bitcoin v0.21.0 on Ubuntu 20.04. When I'm running the make command, I'm receiving this error: funcs.mk:265: *** empty variable name. Stop. What is the ...
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Why variations in tor onion service incoming node identifcation formats?

With these bitcoin.conf parameters: proxy=127.0.0.1:9050 listen=1 onlynet=onion bind=127.0.0.1 externalip=[my 64-char code].onion [plus 32 addnode=[onion address] entries] I quickly get 18 outgoing ...
brec's user avatar
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github bitcoin/doc/tor.md - Automatically versus Manually creating a Bitcoin Core tor onion service

The doc I'm asking about: TOR SUPPORT IN BITCOIN. Section 1 describes how to "Run Bitcoin Core behind a Tor proxy." Then... Automatically create a Bitcoin Core onion service [I]f Tor is ...
brec's user avatar
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Where can I download the bitcoin blockchain to do offline analysis?

Where can I download the bitcoin blockchain to do some offline analysis. edit: Ideally I'd like to download .txt (or another file extension, e.g. .dat, as long as the contents are unencoded and human ...
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Bitcoin core - get transaction information in PHP

I've using Bitcoin core and I've downloaded denpamusic/php-bitcoinrpc with composer. I can get block information with this: $block = $bitcoind->getBlock('...
Giorgi's user avatar
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How to internally call another RPC command inside bitcoin core server?

I'm new to Bitcoin Core development, and I am trying to find a way to execute another RPC command from within a new RPC command I'm trying to add. I believe the Node interface has the executeRpc() ...
andrewz's user avatar
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External USB SSD not recommended for full node?

Peter Wiulle said: Don't use an external drive connected through USB - such hardware is not designed for the kind of heavy database load Bitcoin Core causes. Why is that? Im using a Samsung T7 2TB ...
walamagic's user avatar
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Pseudocode for Bitcoin's P2P block propagation

I am going through Bitcoin's block propagation method at https://developer.bitcoin.org/devguide/p2p_network.html Are you aware of any pseudocode available on how blocks are propagated during the ...
satya's user avatar
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Can you prune blockchain without redownloading?

I've downloaded the whole blockchain now I want to run a pruned node on another device. But if I klick on prune block storage in bitcoin core, it tells me that reverting this setting requres re-...
taway's user avatar
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Use wallet db for locked UTXOs in Bitcoin Core

Related question: Why are UTXO locks stored in memory only? Sorry this maybe a dumb question for people good with using database in C++ however I am not able to understand what exactly is going wrong ...
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Error sendrawtransaction BTC 0.21 Fee exceeds maximum configured by user

How to fix Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate) (code -25) in BTC 0.21? sendrawtransaction "hexstring" Result: Fee exceeds maximum configured by user (e.g. -...
Dam Yi's user avatar
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BITCOIN: get bitcoin transactions list by time using RPC on my node

I want to get the transaction list of a bitcoin node i have. I need to know: How do i get the transaction list filtered by time (1h, 2h,...) using RPC, I have been searching on bitcoin developer: RPC ...
Simon's user avatar
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DB Structure for bitcoin blocks

https://github.com/blockchain-etl/bitcoin-etl#schema I found a library to parse the block data in json format. I want to parse that json and put it into a db to then use that for calculating balances. ...
UnknownHex64's user avatar
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What to look for in Bitcoin-core logfile when something bad happens

About a week ago I was trying to reorganise my file structure with Bitcoin Core, I accidentally moved the file before listing it as a backup so when I opened Core, it didn't work. I tried returning ...
Dan Martin's user avatar
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How to upgrade Bitcoin Core on Mac OS with binaries from tarball?

I want to upgrade to version 0.21.1 from an older version I built from source. However, it is unclear to me how I can upgrade using the .tar.gz file that's available from the Bitcoin Core website. I ...
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Bitcoin core balance won't show up!

I have bitcoin core wallet i havent use since 2013. i let it sync fully now but it won't show my bitcoin balance and this shows up..... Warning: Unknown block versions being mined! It's possible ...
FF COOL A's user avatar
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I got a wallet. dat file, how do I transfer the bitcoin into a new wallet

I have just a wallet.dat files with an unconfirmed transaction on it, can’t remember the backup paraphrase. I linked the wallet.dat in bitcoin core, got the wallet I’d where I check and it shows the ...
Andrew's user avatar
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I need help figuring out what happened with my BFGminer overnight

I'm a newbie to crypto and was experimenting with usb erupters because I was getting into ETH mining with my rig and wanted to test it on something less risky. I ran ck pool for my USB erupter just to ...
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