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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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Why is my P2P_V2 peer connected over a v1 connection?

Bitcoin Core 27.0 which enables v2 transport (BIP324) by default was released a few days ago. I'm already seeing a few peers with the /Satoshi:27.0.0/ user agent and all of them have the P2P_V2 ...
Vojtěch Strnad's user avatar
2 votes
1 answer
47 views

What does unbroadcastcount in getmempoolinfo mean?

What is the unbroadcastcount in getmempoolinfo? Does it track only the transactions from my wallet that are unbroadcasted? Or does it track all transactions that are not broadcasted which I may have ...
sanket1729's user avatar
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Why doesn't bitcoin use bech32 encoding for transaction_id and block hash?

If I understand correctly, transaction IDs and block digests are typically hex-encoded in the bitcoin ecosystem including bitcoin-core RPC calls, block explorers, etc. Meanwhile, bech32 encoding would ...
user49396's user avatar
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1 answer
131 views

How do miners manually add transaction to a block template?

Here's my idea from the quick research: Miners use getblocktemplate RPC method. In the obtained block template, they remove some transaction and instead place in other transaction that wouldn't ...
pycan's user avatar
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Is it possible to run RPC commands without installing the entire Bitcoind

I am interested to run bitcoin mining https://github.com/jgarzik/pyminer/blob/master/pyminer.py , I understand that it inherently calls bitcoind to run some RPC commands to broadcast once a nonce is ...
Jacksparaaw's user avatar
1 vote
0 answers
22 views

Can mediantime be used as a proxy for expected time of the most recently mined block?

I'm using Bitcoin Core CLI to get block info: .\bitcoin-cli.exe getblockchaininfo Among other things, this returns two items: "time": 1713464903, "mediantime": 1713461780, I ...
Hannah Vernon's user avatar
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Very slow sync using bitcoin core on Mac mini m1

I'm using an M1 Mac Mini, 8GB memory, 256 GB internal SSD, 2TB Toshiba SSD (which is where the blocks are being stored). Google fiber internet. I've been syncing now for 2 weeks, I'm at 60%. This ...
neils4fun's user avatar
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Será ilegal negociar bitcoins por meio de jogos da Web3 no futuro? [closed]

Sempre que o jogo está envolvido, a lavagem de dinheiro, a evasão fiscal e outros delitos são inevitáveis. Todas as empresas que desenvolvem jogos da Web3 serão mais bem regulamentadas? Ou elas estão ...
Faustina Mccandles's user avatar
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What do I do if I bought Bitcoin in 2009 or 2008 [duplicate]

I want to find the Bitcoin I purchased in the past by paying 100,000 won. I remember back then that I made the purchase by bank transfer or phone small payment. Is this the right way to purchase it? I ...
호림아빠's user avatar
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How to get the balance before downloading whole blockchain in bitcoin-core

i didn't work with bitcoin-core before and after i run the app i generate an address and send some bitcoin to it, now the bitcoin-core says i should download the whole blockchain before giving you ...
user150958's user avatar
1 vote
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Stuck on "Replaying Blocks" 100% after a forced close

I have had issues downloading Bitcoin Core, where the download would get stuck/frozen and not progress for hours. The last time this happened I closed the Bitcoin Core window and was met with a "...
SoRuud's user avatar
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3 votes
0 answers
15 views

How to broadcast transactions in bitcoin regtest mode?

I build three nodes named A,B,C based on bitcoin-regtest image of docker. And these three nodes are in the same network which means they can communicate with each other. In node A, I use bitcoin-cli -...
Lawrence Yang's user avatar
2 votes
0 answers
19 views

libxcb-xinerama0 Library required by bitcoin-qt

I installed bitcoin core 26.1 on a Raspberry 5 (ARM Architecture) running Ubuntu 23.1. Upon running bitcoin-qt, I got the error that the library libxcb-xinerama0 is required but not installed. It's ...
Neo's user avatar
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Testing new releases privately on selected nodes?

I think the main vulnerability of Bitcoin is a new release messing things up in a way that it will completely destroy people's faith in the protocol. By this I mean something like what happened in ...
mathboi's user avatar
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How does one verify signature in a P2WPKH transaction?

(Assume there's no OP_CODESEPERATOR) For standard P2PKH, the signature digest is generated this way: NewTransaction settle the TxOuts well set all TxIn scripts to empty insert the Previous Locking ...
Archit Dabral's user avatar
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1 answer
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how to create txid from transaction.json

Consider this is the transaction.json file: { "version": 1, "locktime": 0, "vin": [ { "txid": "...
Yuvraj Chhetri's user avatar
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45 views

Old encrypted wallet + bitcoin core

I got desperate, I tried all the instructions I could find on the Internet - nothing helps. What I have: wallet.dat from bitcoin-core encrypted from 2015 (in four different places) the password I ...
LamoSS's user avatar
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1 vote
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41 views

I send sats to the Bitcoin Core wallet I created some time ago without knowing what I was doing and now facing issues with withdrawal I am clueless

Some time ago, I set up a Bitcoin core wallet and sent funds to that wallet a few times thinking they'll be safely stored. Well, they are, and probably too safely. I have a hard time getting funds out....
Najn11's user avatar
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1 vote
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Bitcoin core having trouble connecting to peers

New to Bitcoin. I have been trying to host a full node on my Mac. I just installed bitcoin core but while syncing, it seems my node is unable to connect to any peers. I am regularly checking the debug....
Advait Pote's user avatar
1 vote
1 answer
44 views

I can't parse the UTXO from the chainstate

I have a problem with reading tx out from the Bitcoin Core LevelDB chainstate storage. I know that the structure of the current version of the chainstate is key => value where the key is a prefix (...
Novak's user avatar
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2 votes
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Bitcoin Core stores public keys and balance unencrypted, a few questions

I came across this statement in the Sparrow Wallet documentation; Unfortunately, Bitcoin Core stores your public keys and balance unencrypted on the computer it is running on. If this computer is ...
FractalEncrypt's user avatar
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0 answers
13 views

Help me recover my lost Bitcoin wallet [duplicate]

In 2015, I bought around 10 BTC at $400 each. I didn't realize I had them until one of these days, while going through my old Skype conversations with a friend, I found out that I had sold him a ...
Julio Izquierdo's user avatar
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26 views

Bitcoind isn't starting as system service for some reason

Have bitcoind.service file in /etc/systemd/system with the following contents: [Unit] Description=Bitcoin daemon After=network.target [Service] ExecStart=/media/user/2TB/.bitcoin/bitcoind-start.sh #...
jurijus01's user avatar
2 votes
0 answers
31 views

Cannot connect Sparrow wallet to node using username and password

I'm trying to connect my node to Sparrow wallet on two computers on the same network. As I understand it, I have to authenticate using username/password option on Sparrow. This is the same computer I ...
nbit846's user avatar
  • 21
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45 views

How do I configure BTCPayServer to use an alternative datadir and avoid 'Unable to open settings file' Error?

Similar to: Ubuntu Linux, Unable to set bitcoin datadir to a folder in different drive and I can't start bitcoind on Raspberry Pi. Why do I need settings.json.tmp when I didn't need it before? ...
Poseidon's user avatar
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3 votes
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69 views

How do I set up my own custom signet?

Configuration: a Windows machine on a local WiFi network. For classroom purposes I would like to have a custom Signet network so students can get used with Bitcoin Core and Send/Receive. This is the ...
Bart DV's user avatar
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4 votes
2 answers
299 views

Using Bitcoin Core Regtest in classroom

I'm looking for a way to use Bitcoin Core in Regtest in a WiFi network (educational purposes in classroom). The goal is that students install Bitcoin Core, activate Regtest, generate coins and send ...
Bart DV's user avatar
  • 159
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1 answer
26 views

Bitcoin node GUI shutting down right away

My node was running fine until I decided to change the setting under the nerwork tab, I checked the box for "Use separate SOCKS5 proxy to reach peers via Tor onion services" and on Proxy IP ...
new bit's user avatar
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36 views

Bitcoin Core VM and hardware SHA256

It has come to my attention recently that linux machines store info about their cryptographic capabilities in /proc/crypto. A baremetal machine I have shows sha256_ssse3 in the sha256 module parameter,...
RooSoft's user avatar
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-1 votes
1 answer
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Bitcoin Core Wallet - Google Authenticator?

I know this is probably a weird question, but I need to be absolutely sure. Does the Bitcoin Core wallet offer 2FA through Google Authenticator, kind of like Electrum does? I'm asking because I've ...
Cazes17's user avatar
0 votes
0 answers
14 views

bitcoin transaction stuck on bitcoin.com [duplicate]

transaction id - https://mempool.space/tx/af483ce44a4605a9f13faf66d37e42f574377f7a7723ada51c01f4b98aebdcca I did transaction on bitcoin.com but 28hours ago transaction pending and money deducted I am ...
andrew's user avatar
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-1 votes
1 answer
84 views

Very old Bitcoin Wallet

What I am going to share with you will make you very surprised. I will quickly jump in to the topic as I need some help here. I have one of the oldest wallet key from 2009 Dec. I used to play an MMO ...
Oldman's user avatar
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1 vote
1 answer
47 views

Are there limits to number of attempts at entering a passphrase in bitcoin qt

I have 2 wallet.dat backups from 2013 I am having trouble with accessing due to incorrect passphrase Is there a limit to the number of attempts I can try to get the passphrase.
Ash's user avatar
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0 votes
0 answers
31 views

Bitcoin Cross-compilation failed with errors in notification.cpp

sudo apt update sudo apt upgrade sudo apt install build-essential libtool autotools-dev automake pkg-config bsdmainutils curl git installed all the dependencies in dependencies.md sudo apt install ...
Nobody's user avatar
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1 vote
0 answers
29 views

scantxoutset timing out

I have extremely simple python code to use scantxoutset. The problem is that when I debug in pycharm it keeps timing out. rpc_connection = rpcConnector.rpcConnect() json_req = [{"desc": &...
user2880722's user avatar
1 vote
0 answers
29 views

Should I stop bitcoind when backing up chainstate/ and blocks/ directories?

This is how one might back up their Bitcoin Core data directories in order to save time on syncing in the future: #!/usr/bin/bash local_d=/root/btc_db rsync -av --delete chainstate "$local_d&...
John Smith's user avatar
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0 answers
33 views

How to show every UTXOs of each address in bitcoin core?

We only get balance of all addresses in bitcoin core, but how to show every UTXOs of each address in bitcoin core?
foolbear's user avatar
  • 160
0 votes
1 answer
34 views

from which address when I send some bitcoin in bitcoin core?

I send some bitcoins using bitcoin core, but not know which address sending from? for example: address A: 1 bitcoin address B: 2 bitcoins 3 cases: sending <=1 bitcoin sending >1, <=2 ...
foolbear's user avatar
  • 160
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1 answer
49 views

Is it possible to recover the password from bitcoin.core other than guessing?

У меня есть монеты в кошельке биткой коре,есть дат файл и знаю что пароль из 12 заглавных английских букв и знаю seed phrase, как мне сделать транзакцию или вастоновить кошелек, пароль?
Евгений 's user avatar
0 votes
1 answer
45 views

Is there a method in the Bitcoin RPC API to view all transaction records of a given address?

I used the listtransactions method to get transaction records, but it returned an empty collection. Is it a configuration file problem or other reasons?
muxi's user avatar
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0 answers
26 views

REST API documentation

I'm trying to use REST api of bitcoin core, i can do basic things such as getting latest block, or getting a transaction detail. But I couldn't find detailed explanation of the REST API. I checked the ...
Dante Alighieri's user avatar
0 votes
2 answers
38 views

Bitcoin-qt and Bitcoind see bitcoin.conf file differently

Using Bitcoin core 25.1 on Raspberry Pi. Have .bitcoin dir on external drive. Bitcoin-25.1 package after unarchiving came with bin folder containing Bitcoin-QT and Bitcoind binary files. Bitcoin.conf ...
jurijus01's user avatar
2 votes
1 answer
84 views

Moving the entire directory to new location for Bitcoin Core CLI

I use Bitcoin CLI and not the QT one, when syncing i used a external SSD to store blocksdata in SSD, obviously noob me didnt know of datadir function Now my Chainstate, txindex are in roaming folder ...
123demigod's user avatar
2 votes
1 answer
108 views

What criteria does Bitcoin Core use to create block templates?

I wonder how Bitcoin Core chooses which transactions are added to the template of a block when you call getblocktemplate. Is the mempool sorted by fee rate in sat/vB and selects transactions in an ...
polespinasa's user avatar
6 votes
3 answers
703 views

What are the risks of running a pre-SegWit node (0.12.1)?

Many in the anti-spam faction have contemplated running a pre-SegWit node. But they're told that it is an insecure downgrade and a detrimental idea. So, Is it safe to assume that Bitcoin is not soft-...
WhoIsNinja's user avatar
1 vote
2 answers
84 views

How to use Bitcoin Core GUI to view all transaction records of a certain address?

I want to implement this function: given a Bitcoin address, what should I do to view all transaction records of this address?
muxi's user avatar
  • 11
-3 votes
1 answer
50 views

How many ways are there to Read Satoshi era Wallets?

I've come acrossed a few - running the original Satoshi v.0.1.0 through v.0.1.5 Clients all the way up to Satoshi v.0.7.x - I believe all of these can read Original Satoshi Wallet.dat(s) - I have a ...
Thasthllfe's user avatar
1 vote
0 answers
30 views

Reclaim disk space in Bitcoin Core full node

I have a few stacks: full-node Bitcoin Core + Fulcrum. Because of Fulcrum, I have to use txindex, so it's not a pruning node. The current disk size is 644 GiB for all Bitcoin Core nodes. Do you know ...
BigBoar's user avatar
  • 11
3 votes
1 answer
81 views

How does the initialblockdownload field in the getblockchaininfo RPC work?

Let's say I have a fully synced node that returns "initialblockdownload": false. If I turn it off, will it show "initialblockdownload": true when I start the node again? In other ...
sanket1729's user avatar
  • 1,402
2 votes
1 answer
100 views

Hardware wallet interface

Why would you use the hardware wallet interface as opposed to the software that comes with the hardware wallet, such as ledger live or trezor suite? Is HWI better in some way?
Eoin's user avatar
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