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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bitcoind no such file or directory when trying to execute on Ubuntu for Raspberry Pi 4

Trying to install and run Bitcoin Core Daemon on a Raspberry Pi 4 8GB w/ Ubuntu Server and unable to execute bitcoind. Below are the exact steps I am taking: Use Raspberry Pi imager to flash the ...
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1answer
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What happens if everyone disconnected from the blockchain

What would happen if for some reason, every computer connected to the blockchain was disconnected, and no peer-to-peer connection was established with the blockchain protocol between 2 users. Would ...
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What does the Bitcoin Core wallet backup do?

I set a password to encrypt my wallet, all good. But I can't seem to backup my wallet. I try and nothing happens. Does the backup function give me keys or the seed words?
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334 views

BlockUntilSyncedToCurrentChain: txindex is catching up on block notifications

The message "BlockUntilSyncedToCurrentChain: txindex is catching up on block notifications" is appearing regularly in my debug.log. When these messages appear, I can be sure that lnd will not be able ...
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2answers
175 views

bitcoin core wallet transactions syncing

I'll explain the steps I want to figure out. I have an empty bitcoin core wallet. I backup the wallet and go offline. Someone sends bitcoin to this wallet and I can see it in balance. I restore my ...
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21 views

Bitcoin core -trying to open my watch adress with private key- unsolvable

First of all, please bare with my ignorance. When i bought btc 5 years ago i did not know more than i know today, which is very very little. However, after retrieving my private key for an crashed hdd,...
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25 views

How can I access my bitcoin wallet?

long time ago I changed my computer but I have bitcoin adress and privet key (13 words). Now how can I access my wallet ? (my wallet has Bitcoin core). Please help me
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1answer
99 views

Bitcoin-Qt client wallet.dat extract private key to import on another service

I have a file: wallet.dat where should be saved one or more private keys of my old wallet linked to one/more public btc addresses. I also had more than a wallet, so I don't really know if there are ...
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25 views

Why cannot we trace back the Mystery Miner transaction and identify the exit point, where crypto is converted to fiat?

I read this wonderful article by Jamie. "https://news.bitcoin.com/20-bitcoin-block-rewards-from-2010-moved-today-mystery-miner-spent-400-million-in-btc-since-black-thursday/" I tried ...
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What is the purpose of submit header relative to submit block?

I understand what the usage is for submit block, but submit header exists in the RPC API reference. Is that a legacy function? Or can it still be used? Thanks
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Lessons from the Mt. Gox Hack - 850,000 Bitcoins Stolen

Mt. Gox was a bitcoin exchange based in Shibuya, Tokyo, Japan. Launched in July 2010, by 2013 and into 2014 it was handling over 70% of all bitcoin (BTC) transactions worldwide, as the largest bitcoin ...
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1answer
95 views

How ./configure Bitcoin Core build to pick up depends build and installation path at the same time?

I'm trying to build Bitcoin Core and, if I understand it correctly, the configure script uses the --prefix= option twice, once for the inclusion of the depends build (from depends/README.md): **...
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2answers
51 views

Does Bitcoin “confirmations” have nothing to do with fullnodes — only miners?

Roughly every 10 minutes, a new "block" is created. If Joe sends Sue a satoshi, it will be at least 9 minutes and 59 seconds until they get 1 confirmation (as I understand it). Then, ...
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1answer
26 views

BitcoinCore cant load wallet

I have retrieved an old wallet.dat file from my harddrive that crashed about 5 years ago. I have downloaded the new version of bitcoincore and downloaded the blockchain. I have then copied the wallet....
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1answer
14 views

Bitswallet core

Please does anyone know how to synchronise bitswallet with network. Have been trying to synchronise mine with network. But it does not seem to be synchronising with the network. I need help fixing it. ...
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5answers
625 views

After sending/flooding transactions, how do we know that a specific transaction is on all nodes?

In the book "Mastering the Blockchain" by Imran Bashir, it says that a transaction's life cycle is the following: A user/sender sends a transaction using wallet software or some other interface. ...
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1answer
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Can one manually type the mined block on bitcoin core and broadcast it?

I get that all miners compete to find the block first, which is then broadcasted to other nodes who then verify it. But what spikes my interest is would it be possible to broadcast the block to the ...
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Changes for bitcoin.conf file and details on the testnet network bitcoin-core

I have installed bitcoin core testnet and it is now synchronized with the network after 24 hours. My question is about bitcoin.conf file. I will tell you the procedure I used to install: I created the ...
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1answer
42 views

End to end bitcoin transaction flow

My understanding on bitcoin blockchain technology after going through some articles in past few days. I'm not sure that my understanding is 100% correct. I'm writing so that someone can correct me ...
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1answer
617 views

How Do They Get BTC Wallet.dat With Balance?

Going through YouTube, I found some videos on Bitcoin wallet.dat with balance. Looking at these videos, you will notice that these balances found in these btc wallet.dat are not on watch only ...
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2answers
94 views

Is it possible to change private key

I would like to know if it's possible to change private key of bitcoin wallet via rpc call to bitcoind. Thank you for your answers
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2answers
503 views

Is there something about Bitcoin that prevents us from implementing the same privacy protocols of Monero and Zcash?

Certain coins like Monero and Zcash implement privacy protocols that make it nearly impossible to trace origin and destination of transactions - making them completely anonymous. I'm curious as to why ...
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1answer
136 views

Stay on memory pool when I sending multiple transaction from bitcoin wallet

I run the bitcoin client 0.17.1 on my ubuntu 18.04 desktop. I have some balance in my wallet. Also my client is fully synced.I have face the wallet conflict. When I send multiple transaction at once(...
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2answers
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64: too-long-mempool-chain

I am using bitcoind json rpc api to send bitcoin to multiple bitcoin addresses. I am using sendrawtransaction. When i have 24 unconfirmed payments sent from my account, i can't send anymore because i ...
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48 views

Lost wallet in old HP laptop from 2009. Should I use data retrieval services? [closed]

I bought my old laptop in 2009 and i immidiatley started to mine bitcoins using the Bitcoin software. I recall trying to set up daemon mode and my laptop being overowkred in similar fashion to bitcoin ...
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1answer
81 views

Transaction net gain/loss

I have a TXid in my wallet that contains multiple transactions (multiple sends and receives). From what I read these are transactions the network creates facilitate splitting/combining multiple inputs/...
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1answer
39 views

Bitcoin first versions

Please excuse my ignorance. I think I purchased some bitcoin quite some time ago within the early adoption phase, back then I think passphrases were non existent, Is there a way to access the old ...
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1answer
34 views

Bitcoin Core not showing content of address

Bitcoin core newbie here. I have an old wallet backed up here, and upon download of the latest blockchain info, importing the wallet, my balance is empty. Now I do have 3 transactions which I made in ...
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what is math behind elliptic curve? (duplicate) [duplicate]

I have seen many videos regarding the math behind the bitcoin elliptical curve but none of them showing the public key generation they are just defining few steps. i need complete math behind the ...
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22 views

Accepting Bitcoin Settlement for Business Invoices, Important Business Considerations

Our company is intending on accepting Bitcoin as a settlement option. Currently, we create invoices based on services we perform with 30 day payment terms and want to offer the option of settling the ...
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26 views

How to dump all transaction from single bitcoin address?

How to get/dump/or download/curl request/ for all transaction from single address ??? I need info about txID's, scryptpubkeys, txinwitness and other deep info about transactions Br.
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65 views

Unconfirmed transaction and expired address help

I have one unconfirmed transaction and now the expired address. I cannot abandon the transition because the writing is gray, +24h hours have passed (the arrival was expected in 8 hours...) and no ...
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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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49 views

Bitcoin Core mining back in 2009- 2010 [closed]

SO i downloaded the Bitcoin app back in 2009, I also started mining for Bitcoin using the command setgenerate True. However, as Bitcoin was worthless back then its where i left it. I know that my ...
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1answer
65 views

Retrieve number of OP-RETURN transaction

Is there a possible way to extract the bitcoin transaction protocoll with Python and extract specifically OP RETURN transaction? I want to plot the number of those over the course of time to derive ...
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2answers
507 views

How to edit the label of an existing address exactly like in bitcoin-qt but instead using RPC calls?

I am trying to edit the label of a bitcoin address in my wallet outside of bitcoin-qt. Currently I only know of 'setaccount' but it results in two addresses after editing one, it assigns a new address ...
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22 views

Sending less than 0.001 BTC from my Bitcoin Core Wallet not in memory pool

I recently managed to recover my wallet.dat and passphrase and have been trying to send the 0.00126913 BTC balance from my Bitcoin Core wallet into my Binance account, however the transactions stay ...
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2answers
37 views

Can Bitcoin Core be made to display/enter amounts in USD or other fiat currencies?

Every time I need to make Bitcoin payments, I have to switch many times between Bitcoin Core and my separate Bitcoin currency converter. For example, to see how much that transaction fee is in USD. It ...
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1answer
41 views

Other than relying on “side-chains”, is there any way that Bitcoin could solve “micro transactions”? [duplicate]

I am very aware of the Lightning Network, and have repeatedly tried to gain a full understanding of it and start using it. I find that, whether it's due to it being too complex or me being too stupid, ...
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1answer
81 views

Is Bitcoin Core required for wallet projects?

My team wants to create a cryptocurrency service provider platform to Sell/Buy BTC and something else in form of web/mobile app. It's about one month that I have been studying different articles about ...
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1answer
38 views

Create a wallet from the HD recovery phrase

Is there a way to create a wallet from a Hierarchical Deterministic recovery phrase in Bitcoin Core 0.21.0? I'm using the x64 Windows cli version, in case that matters.
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2answers
30 views

Scan ports for my onion bitcoin node and RPC calls

I'm getting to work my first bitcoin node, it is running P2P through Tor network. 1: How can it be scanned? how can I see if its exposing any port, or port 8333? 2: How can I make RPC calls through ...
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1answer
41 views

how does node validate scriptSig

Let's say I sent some BTC to Bob, so I created a transaction (forget about scriptPubKey) since let's say I was able to prove it by executing scriptPubKey. so After I sent BTC to BOB, new transaction's ...
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2answers
67 views

How to monitor thousands of bitcoin address transactions [closed]

I've developed a cryptocurrency payment gateway application, which generate new addresses for users and all addresses are stored in database,i need a some way to monitor transactions. I implemented a ...
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1answer
61 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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7k views

Installing Bitcoin-Qt on Ubuntu

I am using Ubuntu 11.10. I have downloaded Bitcoin-Qt, but I don't think it has installed itself. The instructions say "download and install" the software, but I'm afraid I need instructions that are ...
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44 views

Old Bitcoin Core Wallet. Coins shown, not spendeable

Alright, so I thought I had 0.7 btc in my old bitcoin-qt wallet. When I loaded it up it showed 0.97 which was nice. But when I check the addresses, I only find 0.13. And any amount over that doesnt ...
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4answers
4k views

Can I cancel a transaction that has not been successfully broadcast yet?

In Bitcoin Core, is it possible to cancel a transaction whose status is: "Status: 0/offline, has not been successfully broadcast yet" The client hasn't caught up with the network. It looks like it's ...
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27 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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33 views

Balance disappeared from wallet after transaction left unconfirmed for a long time

I'm running a bitcoin node using bitcoind. I sent a number of transactions that are unconfirmed for about 10-12 days. But I still have some btc balance in my wallet after sending these transactions. ...

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