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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Bitcoin Core like full blockchain app for iPhone

I am going to buy iPhone 13 Max with 1TB of storage and I would like to have the whole blockchain there, so some 400 GB. Something like Bitcoin Core but for iPhone. Is there something like that?
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RPC port 8332 not accessible after reboot

I have compiled and installed Bitcoin Core for the first time on Debian 11. Everything is up and running except that RPC port 8332 is not accessible after a reboot. I get the following error running ...
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What is the point of confirming a bitcoin transaction more than once?

Given that the bitcoin blockchain is immutable, why is there a need to have more than six confirmations for the same transaction? I was under the impression that a bitcoin transaction is 'official' ...
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Is it correct to differentiate between a validated bitcoin transaction and a confirmed bitcoin transaction?

From my understanding, a transaction is first 'validated' by nodes once a transaction is propagated - so in the early stages. These validated, but unconfirmed, transactions are then collected by ...
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Can I use the Bitcoin Core command line to confirm that the bitcoin I sent to an external address was confirmed and arrived? If so, how?

I understand that one can use a node to ensure that transactions have been confirmed. If I sent bitcoin from my wallet to a friend living in another country, how can I use the command line on the ...
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Unable to find a directory where to put wallet.dat file from my old wallet when I am on my Mac

I am on macOS 12 on (MacBook Air M1) with the latest updates applied. I have installed Bitcoin Core from the bitcoin org website and currently it is downloading the whole blockchain and it will for a ...
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Bitcoin problem [duplicate]

In Greece (From October until now I have given over € 10,000 in bitcoin network for security, taxes and guarantees. For an inactive account I had. I have the contact emails with Mr. Thomas. So far I ...
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Looking for data: Fee rate Per Transaction

I'm looking for websites (dashboards, charts, etc.) and/or datasets which show, average daily transaction fees (sat/vB) average/min/max fees of each block (sat/vB) Also, what would be the steps to ...
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Research article about impact of BGP hijacking on bitcoin p2p network

Based on this answer from 2014, bitcoin nodes are vulnerable to BGP hijacking. There was an incident today in which twitter prefix was hijacked and details are shared in 2 blog posts: https://isc.sans....
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How can I see my public wallet address in bitcoin core?

I've downloaded bitcoin core version 22.0. I created a wallet by this command: [amirreza@localhost bin]$ ./bitcoin-wallet -wallet=test-wallet create Topping up keypool... Wallet info =========== Name: ...
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Is bitcoin core secure?

Amir Taaki says Bitcoin Core is not secure because of undefined behaviour in this video https://youtu.be/EPpDpULPhHc after 30:00 Is this true and how can we fix this? What are the risks of using ...
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What are the considerations when assessing whether to deprecate a feature in Bitcoin Core?

What are the considerations when assessing whether it is appropriate to deprecate a feature in Bitcoin Core? What has the approach been in the past towards deprecation? Has this changed in recent ...
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Increase performance of RPC and ZeroMQ in bitcoin-core

I am interested in the possibility of increasing performance of my Bitcoin Core RPC and ZeroMQ subsystems. I know there is a setting for controlling the number of threads used by the RPC process, ...
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What does the Bitcoin Core RPC createmultisig do? Should it be deprecated?

What does the Bitcoin Core RPC createmultisig do? What would I use it for? Should it be deprecated?
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Should my bitcoin core node be reachable before it has fully synchronized with the block chain?

I just set up Umbrel on a Raspberry Pi 4 and my internet connection is fairly lacking so the blockchain synchronization is taking a long time (currently it is at 1.65%). While that's going on, I'm ...
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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?
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Which arguments should I supply to sysbench to simulate Bitcoin Core initial block download workload?

I currently use following, but perhaps defaults do not effectively simulate Bitcoin Core initial block download workload. $ sysbench fileio --file-total-size=8G prepare $ sysbench fileio --file-total-...
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Generating bitcoin core -rpcauth argument using golang

We're developing a Blockchain deployment solution kotal, and generating -rpcauth argument from the supplied user name and password. The problem is when we try to use the same user and password using ...
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alertnotify: how long is long?

-alertnotify=<cmd> Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message) How long is "a really long fork"?
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stop on alertnotify

-alertnotify=<cmd> Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message) How to stop Bitcoin Core on a really long fork?...
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Is it not possible to have password reset feature in Bitcoin Core Wallet?

I would like to know why there is no feature to retrieve forgot password or reset with a new password ? Thanks
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Is it possible to set multiple JSON-RPC users?

I am passing multiple -rpcuser and -rpcpassword options, but the last user is the one that's working ! I was assuming that I can set multiple JSON-RPC users.
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Is Running Bitcoin Core (bitcoind) On Android Termux A Good Idea?

This is what I did: Before we begin, disable Google Play services and Google Play store to reduce conflict with app on F-Droid. Decentralization gets us even further with what I figured out. Install F-...
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Bitcoin Core RPC in Online Shop - Wallet file not specified error when making purchase

I have my shop website connected to my server running Bitcoin core. If someone makes a purchase, the following error occurs. I don't know where to specify the wallet file as a purchase would happen ...
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Disable Bitcoin core JSON-RPC server?

Is it possible to disable JSON-RPC server ? It seems like it's always on.
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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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create coinbase transaction step-by-step

I installed Bitcoin core, created a wallet and a receiving address, and uses the RPC command getblocktemplate to get coinbaseaux and coinbasevalue, now what ? how do i create coinbase transaction ...
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Bitcoin RPC not reachable: Cant bind RPC server to IPV6

I tried every different combination in bitcoin.conf to make my bitcoin node (hosted in AWS protected behind VPN) reachable but nothing seems to work... Just to clear it out of the way, I opened the ...
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How to generate a public key in wallet rpc commands

I'm trying to generate a public key associated with a wallet. How would I do this using the wallet rpc commands, I couldn't find a command in reference docs which does this. Thanks.
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Is it possible to broadcast psbt in bitcoin core?

Is it possible to broadcast psbt in bitcoin core without converting to raw transaction?
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Does derivation from public and private keys give the same result in normal key derivation?

I am reading about key derivation in chapter 5 of the book "Mastering Bitcoin" by Andreas, along with this detailed thread and BIP-32. Here are some of my understanding about these two ...
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What do these outputs in the log file represent

I sync the entire bitcoin blockchain. The output log file contains verification information for the block. Which part of the verification does this information represent? For example which line ...
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Why is it necessary to solve the SHA-256 issue to get a bitcoin?

I understand that for a new bitcoin to be born it is necessary to solve a SHA-256 problem, that is, to make a machine effort for this (a real race). Whoever makes this effort first takes the bitcoin, ...
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Bitcoin walet not updated [duplicate]

I have setup'd bitcoin core(Version 22.0) on my centos server with pruning set to 3GB. Now, My friend sent me some bitcoins but my wallet still show me 0. The transactions has 41 confirmations. Please ...
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Is this script a non-standard script?

I am currently reviewing a computer science conference paper. The authors in the paper mention that the following is a non-standard script. OP_DUP OP_HASH160 OP_0 OP_EQUALVERIFY OP_CHECKSIG But when I ...
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Lifetime of TOR circuits

I was curious if the circuit to the hidden service( Bitcoin node ) is persistent or if circuit creation takes place in regular intervals. If I understand correctly, once a lightning node connects to a ...
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Bitcoin Core txindex not completing successfully

I am running a full node on Ubuntu (20.04), Core version 22.0.0, which is fully synced up to around 72500 blocks at this time. I am wanting to completely index the full chain however this has not ...
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I received Bitcoin on a promo free. I can't remember anything about it other than I had to fill out in my information. Can I track my bitcoin down [duplicate]

I got free Bitcoin in prom long time ago. Had to give my info any way to track
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Blockchain file

I'm trying to get a better understanding of how Bitcoin works. I understand that a full node can store the entire Blockchain on their machine. If they choose not to prune, there should be a huge file ...
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BitcoinCore does not see balance after private key entry

Please help me understand the situation. I created an address in BitcoinCore to store BTC and extracted a private key to this address (the address was the following type: 31h5a...). This was in 2019. ...
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I invested an online trading account for bitcoin, but after withdrawal, they didn t send money to my bitcoin adress but what they did puzzled me :: [duplicate]

They sent me blockchain application V6.34, and provided me a wallet ID and password and asked me to log in, and when i logged in in i found all the Bitcoin i had withdrawn, but they putted it on an ...
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Creating Coinbase acct for a friend

A friend of my recently asked me to create a Coinbase account for her. She noted she had an acct already, but has issues getting into it for "lack of activity". Anyway, I have received no ...
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Trying to validade a bitcoin block

So I'm trying to validade a bitcoin block just for curiosity, let's take for example bitcoin block #1 (https://bitpay.com/insight/#/BTC/mainnet/block/...
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The effect of block arrival time and average block interval on blockchain forking and resolution

Solana docs say: In Proof of Work consensus, these block times need to be very large (~10 minutes) to minimize the odds of multiple validators producing a new valid block at the same time. There's no ...
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Why is initial block download slow on Raspberry Pi 4 with SSD?

Ran benchmarks using sysbench and CPU, memory and networking performance is very similar on Pi 4 vs Lenovo ThinkCentre M92p (both quad-core with 4GB of memory). Which benchmarks reveal why IBD is ...
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Why is Electrum able to generate .psbt from the address only but BitcoinCore requires a Public Key/Descriptor?

When generating a .psbt it suffices to merely import the address (hashed Public Key) in Electrum while in BitcoinCore (for the same address) I also would have to import either a corresponding Public ...
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Easybitcoin not working

I am new to this bitcoin world, I have installed bitcoin core on my centos server. Bitcoin daemon is running fine. And commands like getinfo works fine on bitcoin-core.cli. But the same command ...
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What is the last non-segwit block mined?

I wanted to know what the last non-segwit block mined is, and if there are still some non-segwit miners?
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IP's in the new and tried table for bitcoin nodes

I was curious what IP's are stored in the new and the tried tables in the bitcoin nodes when the peers have onion addresses.
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Create a .psbt using the BitcoinCore client

I am trying to create a .psbt using BitcoinCore on mainnet. The use-case is that I want to be able to export the unsigned transaction, import it into my cold-storage wallet (using BitcoinCore) and ...
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