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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2answers
22 views

Why blockchain new node verify all transactions in blocks?

Hello I'm the student studying blockchain and bitcoin. I have a question that why all node verify all transactions in blocks. I check if new node connect bitcoin network, then the all transactions in ...
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2answers
117 views

VPS with 80 GB Space, can't download the whole blockchain?

I am using an application and WordPress that allows people to pay with Bitcoin in a small multi vendor marketplace for trading hobby items. The plugin that I'm using is recommending that I run a ...
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1answer
156 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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5answers
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How can I transfer a Bitcoin-qt wallet to Electrum?

I am switching from bitcoin-qt to Electrum, and it seems as if I will need to download the blockchain again. Can I copy and paste my wallet.dat into Electrum's files?
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1answer
27 views

`getaddressinfo` incorrect output for `ismine`

Running Core, trying to verify that I infact control a change address before I sign and broadcast a txn. But I can't find any way to list all future change addresses. I searched and found ...
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1answer
118 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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2answers
117 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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1answer
165 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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1answer
49 views

"bitcoinrpc.authproxy.JSONRPCException: -342: non-JSON HTTP response with '401 Unauthorized' from server"

I used the following code to connect to the bitcoin core client and encountered this error: bitcoinrpc.authproxy.JSONRPCException: -342: non-JSON HTTP response with '401 Unauthorized' from server My ...
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0answers
11 views

Specter Desktop: Can't connect to BTC Core on macOS "-1Error message: autodetect failed" Using external HDD for Bitcoin Core

I have Bitcoin Core is running on the same computer as Specter-Desktop but I'm using an external hard drive to store Bitcoin Core data so I entered the Bitcoin Core "Bitcoin" folder path ...
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0answers
36 views

Mastering Bitcoin book. Out of date or just lacking information for newer updates?

The development of Bitcoin has advanced since the publishing of "Mastering Bitcoin" book. I've also heard that there might be 3rd edition to reflect the development that has happened since. ...
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1answer
64 views

How to calculate circulating supply of coins in Bitcoin?

I am not able to understand how circulating supply is calculated by websites like CoinGecko. What does circulating supply mean here - is it the number of coins already minted? If so, how is that ...
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3answers
87 views

Which country is the Bitcoin core wallet in?

can you tell me which country the Bitcoin core wallet belongs to. I want to return the tax paid, and for this I need to withdraw all funds from the United States.
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2answers
2k views

Where can I find a complete list of Bitcoin forks (soft, hard, intentional and unintentional)

I was looking to study the history of Bitcoin forks including the 2013 incident that may or may not have been a Hard fork depending on your definition.
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1answer
44 views

How to find traitor in Byzantine General Problem

I am new to this problem and trying to understand it. For example if I have 7 generals, 4 of them are honest and 3 of them are traitors. Now, how do I know which 4 generals are honest generals because ...
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1answer
1k views

What does "NODE_WITNESS (12)" mean as it is shown in bitnodes.21.co?

I'm running a pruned full node of bitcoin core version 0.14.0 and checking on https://bitnodes.21.co/nodes/ I can see that my node was labelled "NODE_WITNESS (12)" unlike of the others nodes shown, ...
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0answers
9 views

Error Reading From Database

I've recently sync'd the blockchain w/ bitcoin core, but it seems to shutdown after day or so with an error. I frequently come back to the PC with "error reading from database, shutting down"...
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1answer
53 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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1answer
39 views

How does miner order transactions?

I understand that miners can do whatever they are pleased to do. Either include 0 transaction or 1000 transactions in the block before mining. But I assume majority of the nodes run the same set of ...
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0answers
26 views

Bitcoin Network Security [closed]

What are the latest network attack, node centralization, mining pool centralization, routing attacks, mitigating attacks, security leaks/flaws/vulnerabilities and how are they prevented or practical ...
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0answers
52 views

Questions about Bitcoin Security [closed]

What do you think about bitcoin running without the internet via satellite, is their Blockstream node a form of centralization and how can Bitcoin be safe during times of nuclear war or apocalyptic ...
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1answer
56 views

Cannot verify Bitcoin Core 22.0 GPG

I am trying to verify that the checksums file is PGP signed by the release signing key. I have downloaded the https://bitcoincore.org/bin/bitcoin-core-22.0/SHA256SUMS.asc and imported keys with: gpg --...
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1answer
58 views

Pay to many addresses transaction time?

I read here about the fees difference when paying to many addresses at once instead of doing it one after another. I was wondering whether this applies to the transaction time as well. Is it ...
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1answer
107 views

Can I send BTC from other node or wallet with my address?

I'm trying to send bitcoins from node2 with my address using private key noted that my address is created in node1.I followed this link: "https://en.bitcoin.it/wiki/How_to_import_private_keys" I dump ...
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1answer
115 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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0answers
73 views

Best way to store private key from address

I make my own hot-wallet and wanted to know best way to store private key from address, because I need it for signing transactions. I tried store private key in my bitcoin core node, but I realized ...
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1answer
30 views

Internals of bitcoin block replication workflow from wallet, and conflict resolution

If I initiate a transaction from my wallet, does my transaction go to only one node? Does wallet client send to multiple nodes? What happens if no miner decides to include my transaction? Would my ...
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1answer
58 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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1answer
39 views

BTC - Block Index - Reading the flag values in Level DB

Following the article I tried reading the flag value for txindex in the Block Index database but was not able to fetch the values. I tried fetching value for all below but its NULL always. Am I doing ...
2
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0answers
41 views

Monitor domains used by DNS seeds in Bitcoin Core and Bitcoin Knots

Problem: DNS seeds and security Solution: I want to create a website which does the following: Check 'A' record for all domains used by 9 DNS seeds every 5 minutes Save all IP addresses in local ...
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1answer
37 views

bitcoincore with linux (tgz) or arm linux

I am running a node on a raspberry pi 4 model B 8gb with linux as os, should I update bitcoincore with linux (tgz) or arm linux.
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1answer
46 views

When exactly does Bitcoin transaction batch happen?

I need some help understanding the Bitcoin internal... The basic idea is: The miner assembles N transactions into a block (rather than creating a consensus for every single transaction). And hash ...
2
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1answer
57 views

SPV wallet connecting to personal bitcoin node

I have decided I want to run a bitcoin node both to support the network, learn more about how it works and also so I can participate while minimising trust in external parties. I have a bitcoin core ...
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1answer
234 views

bitcoincore banned all peers and I can't to sync

I started downloading the chain and got to 14% and it just stopped and still shows 7% per hour but not moves. I checked and it banned all the peers and everytime I unban them they just get banned ...
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2answers
33 views

Cannot compile depends library- bitcoin v0.21.0

I'm trying to compile the depends library of bitcoin v0.21.0 on Ubuntu 20.04. When I'm running the make command, I'm receiving this error: funcs.mk:265: *** empty variable name. Stop. What is the ...
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1answer
59 views

how to connect to bitcoin node in javascript without running a local node

I am trying to get some bitcoin network data and I am using bitcoind-rpc library. If i just run their example: var run = function() { var bitcore = require('bitcore'); var RpcClient = require('...
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1answer
2k views

Blockchain.info, does recovery phrase recover all wallets?

I need some help understanding blockchain.info. 1. Under the Default wallet, I can generate multiple addresses and also see the Extended Public Key (xPub). If I go to the iancoleman BIP39 mnemonic ...
2
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1answer
77 views

How to save the mempool information immediately before the node receives a block?

I want to use Bitcoin RPC API 'getrawmempool' to save the snapshot of the mempool immediately before my full node receives a block. This requires modification of the Bitcoin source code. How should I ...
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0answers
45 views

Need to load bitcoin wallet on bitcoin-core

I have retrieved the private key (bitcoin wallet) that I had stored somewhere a couple of years ago. Now I am trying to load it to bitcoin core but doesn't seem to work. Stored the key into wallet.dat ...
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2answers
86 views

Is there a risk in entering my Bitcoin-Core wallet passphrase, if it's for sending all my available balance and never using that wallet again?

I have Bitcoin-Core wallet.dat with a single address and a small amount of bitcoins in it. Say I want to send all the available bitcoins I have, and then never use that wallet again. Can I use an ...
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0answers
23 views

Version 0.10.0 2009-2015 [duplicate]

I downloaded Bitcoin Core Version 0.10.0 back in 2000 something. I bought $ 100back then. I forgot about it and I found the program, downloaded and its been syncing for 1 week.
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2answers
42 views

What is the difference between wallet versions 159900 and 169900

The wallet from 2018 version,159900 to the one i have now which is version 169900,what is the difference in the two diff versions?
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0answers
25 views

Building Bitcoin Core on Linux/Ubuntu with Visual Studio Code

Does anyone developing Bitcoin Core use VSCode for compilation and debugging on Linux/Ubuntu? How can one configure VSCode to compile Bitcoin Core?
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2answers
19 views

Why in old blocks I can't see the miner address using RPC API calls?

So, I'm using Bitcoin Core RPC client version v22.0.0 and Bitcoin Core version v22.0.0. To get the block with height 1, I call the API like this: bitcoin-cli -datadir=/Users/dennis/Bitcoin getblock \ ...
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1answer
21 views

Maximum number of outbound connections in 2009

Maximum number of outbound full relay connections is 8 and 2 block-only excluding manual connections (8) right now Maximum number of outbound full relay connections What was maximum number of outbound ...
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2answers
441 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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2answers
45 views

How do I set up bitcoind to track all address balances?

Bitcoind only stores information about addresses that you've added. How do I make it store balance and transaction information for all addresses so that given any address I've never seen before, I can ...
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3answers
59 views

Why coinbase maturity is defined to be 100 and not 50?

I understand the logic behind coinbase maturity. One thing that I cannot find an answer for is why it's defined 100 and not 50? Is it just probability reason to decrease that orphan blocks will be ...
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2answers
42 views

Help a newbie. Need software [closed]

I want to invest in a mining farm. Everywhere I find only pieces of information. Help please - you need: What software is needed and for what. Where to begin. Equipment and installation conditions. ...
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1answer
36 views

What actual data format does a Bitcoin Core wallet.dat have?

I'm trying to extract the transaction log from a bunch of wallet.dat files. Not private keys. All I want is to get access to the transaction log stored inside the wallet.dat. I can't find any mention ...

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