Questions tagged [bitcoin-core]

This tag should be used for questions pertaining to Bitcoin Core. Bitcoin Core is an MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client". This tag should be used when referring to the Bitcoin Core software.

612 questions with no upvoted or accepted answers
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149 views

Clarification of some getaddr() function inputs and outputs

In the Bitcoin system to discover new nodes, each node communicates with its peers by sending getaddr() to the peers. Based on the bitcoin implementation: //! the maximum percentage of nodes to ...
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380 views

I have bitcoin in an armory wallet - how do I get the Bitcoin Cash

I have an amount on bitcoin in an armory wallet from a year ago, and have never moved the coins. How do I get the bitcoin cash coins from this? Can I just install the bitcoin cash client and ...
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1answer
1k views

How can I accelerate confirmations in ledger nano s?

I am using Ledger Nano S hardware wallet to store my bitcoins. Last week, for an experiment, I decided to send bitcoins to hitbtc currency exchange with zero btc fees. I was wondering how many hours ...
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1answer
143 views

Wallet for btc bot

Which bitcoin wallet should I use to manipulate it programmatically? I don't want to use heavy bitcoin-core. But as I understand there are different kinds of bitcoin's thin clients: some outsource ...
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105 views

Is the reference client of Bitcoin regularly audited?

I imagine that plenty of eyes have combed through the reference client's source code. But the code is still changing for a variety of reasons (features, patches, improvements, etc). I didn't find ...
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55 views

What is preventing segregated witness from being activated

Segregated witness has been around since 2015 with good publicity and proponents since early 2016. It seems to have the benefits of solving transaction malleability, creating a good foundation for the ...
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57 views

Banned bitcoinj node ip

I've created many raw transactions today and after an hour I found out that my bitcoin node is only connected to 3 peers (testnet). Is it possible that my node has been banned due to wrong or double ...
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98 views

Running TorBB on host machine while running Whonix VM setup as guest on the same physical box

I've currently set up Whonix VMs using Virtual Box on OS X 10.11.6. Before that I was using a Bitcoin-qt with Tor Browser Bundle. Now I'm having question what is a best way to use bitcoin+tor setup ...
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344 views

How can I add an old Bitcoin wallet address from Bitcoin Core to MultiBit HD?

I have a wallet with Bitcoin Core. I have used that address on various sites to receive payments from them. I want to add that address to my account on my MultiBit HD program so it will just carry ...
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A question on CNode class data members

Can any expert help me understand the need for the following members of CNode in src/net.h std::deque<CSerializeData> vSendMsg; std::deque<CInv> vRecvGetData; std::deque<CNetMessage>...
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114 views

Include Bitcoin-Transaction within database-Transaction

I am writing a system that uses the Bitcoin Core JSON-RPC API. Use case: user wants to withdraw some BTC to his BTC address. My application handles this request by the following logic: Check if ...
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105 views

Bitcoin .11 Initial Blockchain Download Problem with OS X 10.10

I am loading the blockchain for a new wallet. Initially I had problems due to ISP issues. This issue is fixed and I now have 8 outbound connections working well with ping times ranging from 50-800 ms. ...
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1answer
922 views

Run bitcoin-qt at startup of Windows server

I am running bitcoin-qt on my server. I use .Net library to query it through windows services. It all works when I start bitcoin-qt manually. But if the server is restarted, I see that it is running ...
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728 views

Import OLD wallet.dat to new Bitcoin core

i made a wallet.dat backup in an old version of bitcoin qt. The mac where i had wallet is dead. In other mac with the last version of bitcoin core when i try to replace the wallet.dat the app crushes. ...
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1answer
680 views

Bootstrap.dat on Mac OSX 10.9 - Difficulty

Been trawling through a lot of information (I know this similar issue has probably come up a fair bit) on this issue and going round in circles a bit. I am not the most tech savvy individual, and ...
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4k views

Bitcoin-Qt & setgenerate true

Will Bitcoin-qt mine bitcoins if all I have done is downloaded and installed Bitcoin-qt, and typed in "setgenerate true" into the console? Are there other steps or configurations necessary? If so, ...
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780 views

Just installed bitcoin, but it won't connect

Total newbie at bitcoin; long time Linux user. kubuntu precise 64: My first attempt was just to download it (a slightly older version than the one from the ppa below), untar it and run the executable....
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712 views

Ws2tcpip.h and winsock2.h on Window QT Wallet

Been trying for the past few days but couldn't get it working, I already download the latest cryptopp library but its seems that maxcoin got some issue compiling If I qmake "USE_UPNP=-" maxcoin-qt....
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548 views

What JSON RPC commands are suitable for a multi-tenant wallet service?

I'm looking at the JSON-RPC commands available in the QT client so I can create a multi-tenant wallet service on top of it. In other words, people would sign up for my site and have the ability to ...
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238 views

What limitations are there to creating a Bitcoin client on Google App Engine?

I want to create a Bitcoin client on App Engine with equivalent protocol functionality to bitcoind. With the new Sockets API available in Python and Java I believe this would almost be possible. The ...
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99 views

bitcoin files mysteriously show up in trash

I'm usually pretty good at figuring things out, but this one has me stumped. Yesterday I saw 5 or so (don't remember exactly) bitcoin-qt(something).gz files in my trash that i had NOT sent there. It ...
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2k views

Importing a backed-up encrypted wallet.dat

I have bitcoin-qt-0.8.1-beta installed on a computer. I also have another computer in which I'd like to share the same wallet. First, for backup purposes, I have exported the wallet into a backup ...
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249 views

Bitcoin-qt database for BitcoinJ downloadBlockChain()

I am using bitcoinJ to develop a bitcoin based payment module for my project. I have the complete block chain downloaded/in sync with the network on the bitcoin-qt client. Is there a way I can use ...
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1answer
769 views

What is the required input for python-bitcoinlib getrawtransaction command?

I am running a bitcoin node on my machine, fully synced with RPC commands enabled, rpc server live and txindex=1. In the command-line I can run the following RPC call and obtain the information ...
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cannot generate bitcoin first block

I have download bitcoin source and change genesis in regtest. and i try to generate 1 block by command ./bitcoin-cli -generate 1 it does not show any mining block. i try over 10 times but it is still ...
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1answer
38 views

Unconfirmed transaction: the status is “0 / unacknowledged, not in memory pool ”

I started a transaction with bitcoin-0.21.0-win64, a Windows client. It may be that the fee is set too low, which leads to the unsuccessful transaction. What should I do in the future? What do I need ...
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bitcoin-etl: problems with installing

I am trying to install bitcoin-etl: https://github.com/blockchain-etl/bitcoin-etl to analyze bitcoin blockchain. I have Mac OS and python3, I run this in terminal: pip install bitcoin-etl Also tried ...
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1answer
85 views

bitcoin payment has big fees

I am using the bitcoin-rpc and everytime i create an invoice from a PHP script, i create a new address. All is ok, i get the money after, i have a script that checks number of confirmations, then when ...
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39 views

In concrete terms, how do I start using Lighting Network right now?

I have Bitcoin Core installed on Windows and it's fully synced. I am able to send and receive Bitcoin payments. I hate the fees and waiting, so I want to use Lightning Network. I've spent countless ...
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57 views

Generating zero-amount transactions in regtest mode?

I'm setting up a larger test network of regtest nodes in which all of them should be easily capable of creating blocks and sending transactions. To this end, I'm looking for a simple way for the nodes ...
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24 views

Questions RE soft forks

I’m trying to understand how the Bitcoin network works a bit better and the main thing I’m having trouble with is forks, particularly soft forks. I have a few questions about how exactly a soft fork ...
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1answer
17 views

Search and delete bitcoin core and other related files to reduce attack surface

Do we have any option in Bitcoin Core to search files used by it? Or any option to delete all such files? Are all important files deleted when uninstalling Bitcoin Core? Should we remove such files ...
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Bitcoin fails to compile with Boost

After running 'autogen.sh', './configure' and then 'make', I keep getting the following error: Undefined symbols for architecture x86_64: "__ZN5boost10filesystem4path5imbueERKSt6locale", ...
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25 views

BIP44 Account Discovery using Bitcoin Core

I have an address I suspect that I generated after I made a backup of wallet.dat, and I read about account discovery in BIP44. Does Bitcoin Core support this, and if so, how can I initiate it? I’d ...
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49 views

Why does bitcoin core appear to freeze while connecting to peers on startup?

When I startup bitcoin-qt (version 0.20.1.0) on linux, at the bottom of the app is the mesage "Connecting to peers... 4 years and 10 weeks behind". It appears that things are just frozen, no ...
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29 views

Will upgrading from 0.10.2 fix read block errors?

I have a relatively old version of Bitcoin Core (0.10.2) aka Bitcoin-QT.app, installed in 2015. Bitcoin Core won't open anymore. I'm on MacOS Mohave, v10.14.6. and I have just 60Gb of free hard drive ...
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1answer
47 views

Unable to use `blocks` and `chainstate` from external drive

I want to use data directory from a different location (external SSD) on a Windows machine. When I save the path for it in bitcoin.conf it still uses old data directory. How can I use datadir in ...
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1answer
28 views

Are there any privacy benefits in using a separate wallet in Bitcoin Core to separate myself from my service?

I currently run Bitcoin Core with the following wallets loaded in: hot.dat. Contains the smallest possible sum of Bitcoin. Unencrypted and used by myself for various personal Bitcoin purchases, and I ...
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0answers
36 views

How to calculate R,S,Z for bitcoin raw transaction with many inputs and outputs?

How to calculate R,S,Z for raw bitcoin transaction ? I try many methods and all of these not work for me/ For examle this transaction cf1905de5336258673e1bfc5d25c7de0f701f745d5dc2429006fafe37077d89a (...
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27 views

Why can't I minimize to tray when I launch Bitcoin on startup?

If I set Bitcoin Core to start on system login, the option to "Hide tray icon" and "Minimize to tray" become disabled. On my system (Pop_OS!) This causes bitcoin-qt to be neither ...
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1answer
83 views

Upgrading/converting bitcoin core wallet between platforms

After 2 years of being shut down, I am trying to revive my bitcoin full node, while both switching platforms and upgrading to the current version in the process. Everything works but the wallet. The ...
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1answer
120 views

HD Wallets, XPUB and child private key leaks

So some generalisations on xpubs and current wallet providers. Ledger and Trezor wallets can create xpubs which can show all transactions of a wallet When a passphrase is added, this counts as a new ...
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21 views

How to view addresses previously shown by Bitcoin QT console

I want to be able to compare receive and change addresses that are provided by watch-only wallet providers like Specter and Electrum with Bitcoin Core (not something like Ian Coleman's tool). I ...
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40 views

How can I use a secondary disk for the blocks folder with the snap install?

I always installed bitcoin from the tar.gz but now tried the snap but it uses a different data folder, so I removed the blocks, chainstate and indexes and replaced them with the same old symlink to my ...
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1answer
57 views

What possible explanation could there be that Bitcoin Core on Linux Mint claims to but does not save the wallet backups?

Linux Mint. Bitcoin Core 0.21.0. I go to "File" and "Backup wallet", then select any location. I've tried with /home/a and /tmp and others. Every time, Bitcoin Core says that the ...
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2answers
164 views

Should I be using the “encrypt wallet” feature in Bitcoin Core?

All my wallet.dats have no password. However, the internal hard disk where the "live" one is located is encrypted, and so are the offline storage devices where I have my "cold" ...
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145 views

How to access a wallet in bitcoin core using raw key export from edge wallet?

I have a wallet in the Edge Wallet app. When I view "Raw Keys", I see this json: { "format": "bip49 ", "bitcoinKey": <seed phrase>, "coinType": ...
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1answer
27 views

Is the Cloudflare proposed ODOH protocol a thing that could improve Bitcoin node privacy?

Recently Cloudflare proposed an improvement to the DNS over HTTPS protocol called ODOH (Oblivious DNS over HTTPS). It allows separating a DNS server into two parts: the resolver and the proxy that ...
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29 views

4 ERRORS GENERATED WHILE INSTALLING BITCOIND

I need your help plz. I have been struggling for weeks to make bitcoind work in my mac terminal. I installed all required programs and dependencies: xcode, bitcoin core, openssl, homebrew, and cloned ...
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52 views

listreceivedbyaddress() does not return info about change addresses

listreceivedbyaddress() does not return info about the change addresses (m/84'/1'/0'/1/*) , only about the receive addresses (m/84'/1'/0'/0/*). However the command getreceivedbyaddress("address&...

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