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.

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25 views

I have deleted Bitcoin core but it keeps restarting and taking the storage

I m using Bitcoin Core version v0.21.1. My problem is that even after deleting the Bitcoin folder in the application support, the bitcoin folder reappears in 2-3 days. This morning I saw another ...
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1answer
56 views

Bitcoin Core Error

I'm having an issue downloading the bitcoin blockchain on a new computer. I downloaded it all day yesterday without issue (80% downloaded) and then when I woke up this morning the computer was still ...
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Space of Bitcoin Blockchain [duplicate]

I am a beginner of Bitcoins. I read here that the size of the blockchain is heavy HUNDREDS of gigabytes. I also read that one of the reasons bitcoin is safe is that EVERY user keeps a local copy of ...
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37 views

How does bitcoin main its release cycle?

Bitcoin is huge these days more than its value I'm interested here how does they manage all of these what is there release cycle? how do the deploy? and where since there are thousand of nodes. what ...
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After mining rewards go down to 0, can someone clog the Bitcoin network by creating millions of transactions with no fees?

After mining rewards go down to 0, it is possible miners will not pick up transactions with 0 fees. In that case, could someone create millions of transactions with no fees, to congest the mempool and ...
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2answers
819 views

Is it correct to say that Bitcoin has a virtual machine in the same was as Ethereum does?

I always thought that between Bitcoin and Ethereum only the latter had a virtual machine. The answer to this thread opened my eyes to the fact that Bitcoin actual has a virtual machine. However, I ...
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1answer
22 views

Visual Studio Compilation errors in V21.1

I have successfully downloaded the source for Bitcoin Nodes V19 and V20 and built them in Visual Studio but get compilation errors when trying to do the same with V21.1. I have reloaded all dependent ...
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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 ...
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Do I need to create a new backup each time I generate a new address even with HD wallet on?

I don't really understand this. Back then I remember there was something about how if you generated more than 100 addresses, you needed to backup because reasons. I don't remember. I never generated ...
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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 ...
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1answer
502 views

Would reusing addresses result in a lower fee?

Let's say you withdraw 100 times from an exchange using a different address each time for a total sum of 1 BTC. Now you want to move this entire BTC to a new address. This would result in a ...
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Add ipv6 addresses from `getpeerinfo` of Node 1 in peers.dat for Node 2

Node 1 (connects to only ipv6 nodes): bitcoind -signet=1 -port=18333 -rpcport=18222 -rpcuser=user1 -rpcpassword=pass1 -datadir=/home/prayank/node1 -debug=net -onlynet=ipv6 Get address for few nodes ...
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Is there a list of processes within Bitcoin that use hash functions?

Hashing within Bitcoin is done in several different areas of the code. EG: We have the SHA-256 mining algorithm, the Merkle tree hashing, and I believe double hashing within certain areas (SHA-256D). ...
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Bind to local IP address and use it in addpeeraddress

Bind local IP (Node 1) bitcoind -regtest=1 -port=18333 -bind=192.168.150.110 Logs: 2021-09-01T13:14:16Z Bound to 192.168.150.110:18333 2021-09-01T13:14:16Z Bound to 127.0.0.1:18445 Trying to add it ...
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Should you be able to run a mainnet c-lightning node in parallel with a signet c-lightning node? What about an alternative Lightning implementation?

Running mainnet, testnet and signet Bitcoin Core full nodes on the same machine/same VM works fine. Is running say a c-lightning mainnet node in parallel with a c-lightning signet node on the same ...
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91 views

What is the latest bitcoin script connection string operation code?

What is the use of the updated op_success operation code?
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1answer
82 views

How to import multibit private key to bitcoin core?

I've just found an old HD with a multibit wallet with a little bit of content and I want to open it in bitcoin core since multibit is deprecated nowadays. I have the private key for the wallet, how to ...
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43 views

Bitcoin-qt attempts to load its old wallets. How can I configure it so that it does not do it?

Warning: Skipping -wallet path that doesn't exist. Failed to load database path '/home/jerzy/.bitcoin/testnet3/wallets/blank'. Path does not exist. I get this warning anytime I launch it with nohup ~/...
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1answer
19 views

What is StrDataDir in Bitcoin-Qt.conf used for?

I just changed the system on which I'm running a node from a Mac to a Ubuntu Linux system. On the Ubuntu system the blockchain data is on a disk device different from the root disk containing my home ...
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55 views

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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1answer
30 views

How do I pass optional arguments in JSON to bitcoin-cli createwallet without using curl?

I need to create an encrypted blank wallet, and for this purpose I need to furnish bitcoin-cli --testnet createwallet testwallet with two more optional arguments. Let the passphrase be "...
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Openssl errors when building the bitcoin-core on macOS

I have been trying to build bitcoin-core on macOS as I am reading the "Mastering Bitcoin" book from Andreas Antonopoulos. I read the instructions for building the the bitcoin-core on macOS ...
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1answer
23 views

Crpyto Bitcoin Insurance

How will the Bitcoin Crypto market compete against theft, if other fiat currencies have similar to FDIC insurance? In this article, some thieves did a phone swap, got a two factor authentication code,...
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390 views

Is there a tool like Ethereum EVM at present for Bitcoin script?

Is there a tool like Ethereum EVM at present? Users can write bitcoin scripts in a syntax just like python(or like other programming language); through this tool, they can be translated into bitcoin ...
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How does `getbalance` behave during a reindex?

Rich Remer asked in a comment on another topic: Should getbalance work before the full reindex is complete? For example, if my imported private key received Bitcoin in 2010 and Bitcoin Core has ...
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50 views

How to load Bitcoin-qt using blockchain directory already existing on a hard drive?

I've had issues with downloading the blockchain using windows/mac. For some reason, it would eventually cause an issue whilst downloading and cause me to have to start again. Instead, I have been ...
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1answer
112 views

Bitcoin Core v.0.14. doesn't recognise recipient address starting bc1

I have some problem with sending Bitcoin from Bitcoin Core v.0.14. When entering the address in recipient field it becomes red. And I noticed that the address to which the translation needs to be made ...
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36 views

Copy data from full node to a new pruned node to sync faster

I already have a full node synced with blocks and chainstate folder, however i wanted to run a pruned node, is there a way to copy the blocks or chainstate folder to make the initial sync of the ...
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1answer
48 views

How do I use Bitcoin Core (fully synced) to "backtrack" a receive address?

I'm trying to "reverse-track" my current Bitcoin wallet to see its exact history on the blockchain, backwards. I have a fully synced Bitcoin Core installed. What command do I use in its ...
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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('...
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1answer
51 views

GetMinFee() in blockchain.cpp

"mempoolminfee" : n, (numeric) Minimum fee rate in BTC/kB for tx to be accepted. Is the maximum of minrelaytxfee and minimum mempool fee "minrelaytxfee" : n, (numeric)...
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What is the difference between True and False setting of newkeypool variable on the sethdseed command?

When I create a new blank wallet and set the seed with both newkeypool as True and False...I do not see a difference in the resulting dumped wallets. The cli help states: Arguments: 1. newkeypool (...
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40 views

Is there a bitcoin.conf option to disable the node from getting blocks?

I would like to use bitcoin core as a wallet only - to generate addresses and to sign transactions. So I don't want it to download the blockchain. Is there a bitcoin.conf setting for this?
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56 views

Why .bitcoin is at /root in Arch/Manjaro Linux?

I've installed bitcoin-core and downloaded the blockchain in Ubuntu. Now that I have switched to Manjaro Linux and installed bitcoin-core again, It creates the .bitcoin directory in /root/.bitcoin/ ...
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Bitcoin Core - create new receiving address with PHP

I have Bitcoin Core on Debian Need to create new receiving address with PHP. As you see at screenshot, I've try to create new address from terminal, but that does not added at Bitcoin Core Receiving ...
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1answer
18 views

Macro HAVE_DECL_FORK

I'm a new learner of bitcoin project. I'm aware that the macros in header file config/bitcoin-config.h and whole file itself were generated by autoconf. Looked into configure.ac, regarding to fork ...
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How to merge the datadir with .bitcoin directory?

I changed the path of datadir in bitcoin.conf from .bitcoin directory to somewhere else. Now that I need to backup my blockchain data, I want to have both .bitcoin and blockchain data together. ...
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1answer
45 views

Is it possible to check which nodes banned my node?

I can ban peers with setban and check banned peers with listbanned in Bitcoin Core. Can I check which peers banned me?
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1answer
46 views

Why is the seed not at the top of the file and clearly identified when dumping a wallet in bitcoin core?

When I dump my wallet in bitcoin core: bitcoin-cli dumpwallet mywallet.txt The output looks like this, obfuscating keys with XXX # Wallet dump created by Bitcoin v0.21.0 # * Created on 2021-08-12T17:...
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1answer
37 views

Select a fee based on confirmation time. How to implement it?

I'm developing a client on nodejs which connect to a bitcoin core node through JSON-RPC. I want the user to be able to select the fee they want based on the time (the same way bitcoin core GUI does it)...
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2answers
782 views

How to earn benefit for bitcoin core developer?

Will there be any benefits if we directly provide core source code development for bitcoin? I like Bitcoin very much and I hope to join this community and at the same time have income to subsidize my ...
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1answer
37 views

How to get peer nodes information from bitcoin CLI?

I saw a feature called Node Window in the bitcoin GUI environment, that shows information about peer nodes, like User-Agent, Received (Data), Sent (Data), Ip, etc. How do I can get such information ...
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21 views

send_and_ping() in bitcoin core tests

Is there any downside if send_and_ping() was a hidden RPC instead of just a function in python test framework? def send_and_ping(self, message, timeout=60): self.send_message(message) ...
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1answer
178 views

How to make a taproot transaction with bitcoin-cli?

Can you give a simple step-by-step example for a taproot transaction with bitcoin-cli on Testnet?
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206 views

Average/Median Bitcoin Holdings for US [closed]

They said 17% of US Residents own bitcoin, or 46 million americans. Just curious if anyone knows the median/average amount for these people. $100? $500? $10,000? I am trying to find statistics on this....
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38 views

cannot relocate blockchain data directory for bitcoin core on ubuntu (snap installation)

I have two drives (one SSD for OS and software - and one HDD for blockchain data). I recently tried the snap installation for bitcoin core and found out that you cannot choose directories outside of /...
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61 views

When exactly are peers saved in peers.dat file?

I had tried few things when reviewed this PR: https://github.com/bitcoin/bitcoin/pull/22013 While reviewing PR https://github.com/bitcoin/bitcoin/pull/22651, I was expecting 1 peer to be saved in ...
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40 views

Add inputs and outputs to a transaction signed with sighash SINGLE | ANYONECANPAY

I created a transaction with one input and one output, and signed it using sighash SINGLE | ANYONECANPAY. Can I add further inputs and outputs with another wallet using bitcoin-cli?
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submit unconfirmed transaction use submitblock and collect fees [duplicate]

for make unconfirmed transaction at blockchain more faster confirmed, i myself using bitcoin core full node, how about if use submitblock command for make transaction quickly confirmed? also from ...
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1answer
71 views

Bitcoin core initially downloads IBD quite fast , then it slows down a lot , What could be the reason?

I am trying to setup a bitcoin node , ran bitcoin core and it started the download process quite fast ETA 18 hours , gradually the speed decreases . When I started download it showed like 17 hours ETA,...

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