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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A rogue wallet was created on my Full Node. How did this happen? Can external users create a wallet on a Full Node?

I have a synchronous (1G/1G) network connection and I was willing to put up a full node that allows inbound synchs, but not without figuring out how someone opened a rogue wallet on my system. This ...
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39 views

RPC interface MITM protection

When I connect to my bitcoind instance over RPC, I need a password for that, but no certificate. So how are man-in-the-middle attacks prevented on that connection?
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Solved: Need help setting up Bitcoin Core full node over Tor (solely) and Tor hidden service. Tried a bunch

Fetching getnetworkinfo should result in IPv4 and IPv6 flags set to false and Tor to true. This will ensure that I am operating my node privately. But this is not the case for me. This is what I ...
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Is the coinbase automatically generated by the getblocktemplete rpc call?

I'm working on a mining script and i just want to really be certain for sure as I wouldn't want to waste Time & resources. Q1 - Is the coinbase transaction automatically generated by the ...
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How to create a Transaction with or without scriptPubKey?

I'm using the bitcore-lib-cash to attempt to create an instance of Transaction (_fromNonP2SH). Transaction.prototype._fromNonP2SH = function(utxo) { var clazz; utxo = new UnspentOutput(utxo); if ...
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1answer
61 views

old paper wallet shows missing balance after import; hacked? Bug? Confused?

I have an old (2014) paper wallet I've deposited coins into over the years. I have another paper wallet that was generated around the same time, but wasn't used until last year. I just finished ...
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1answer
24 views

Replicate bitcoin core for backup

I want to know if possible to have the same bitcoin core and his same wallet running at the same time in two different machines, can I use the same RPC user/pass, I have o machine running but I want ...
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Submit and old bitcoin block

Im using bitcoincore to submit the block 536592. Is possible submit an old bitcoin block like 536592 using bitcoincore? Thanks
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Does Taproot expand the potential for smart contracts? If so, how? [duplicate]

I have heard that Taproot will expand BTC's potential for smart contracts. Is this true? If it is, how so?
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1answer
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What are the main technical differences between Bitcoin-core (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV) [closed]

What are the main technical differences between Bitcoin-core (BTC), Bitcoin SV (BSV) and Bitcoin Cash (BCH)? At what block number did the fork take place? Do they integrate Segwit/Taproot? What ...
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Earning reward submitting a block

I use bitcoincore to submit a block. Can I earn somekind of reward submitting blocks? Thanks
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61 views

Bitcoin Core just deleted my 350+ GB of blockchain data?

I've kept the same config file and internal hard drive for my Bitcoin Core datadir for many years. I've updated to numerous new versions. The other day, I reinstalled Windows on the system drive again....
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37 views

Validate raw transaction hex without broadcasting

I would like to check the validity of a raw transaction (i.e. whether it would be accepted by network nodes), without broadcasting the transaction to the network. I am interested in knowing what is ...
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How to read the balance on a wallet address

So, first of all i will be creating these wallet addresses on my end using below code: const diviMainnet = { messagePrefix: '\x19Divi Signed Message:\n', ...
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33 views

Algorithm behind Bitcoin Core's hashes/s metric

The call bitcoin-cli getmininginfo returns a metric networkhashps among others. It shows how many hashes the entire Bitcoin network generates per second. This metric however, is not directly stored ...
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What happens if a transaction is duplicated across different blocks?

I'm sure I am missing something trivial here but I have a question. Let's say we have Node A and Node B. We send a transaction request to both nodes. Both nodes now contain an unconfirmed transaction ...
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39 views

Layout of new SQLite descriptor wallets in v0.21 and v22.0?

I'm trying to explore the database format of the new descriptor wallets in Bitcoin Core v0.21 and v22.0, but I can't quite figure it out. I've created a new descriptor wallet and dumped it's contents ...
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33 views

Are hardware wallet seeds cross compatible over all brands and even software wallets?

I had a discussion today and I'm really confused. What I though is happening with each hardware wallet is this: Seed (BIP39) 1 --> HW Wallet (ledger) --> chip1 + seed = private key 1 Seed (...
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77 views

What's the relationship between Bittorrent and Bitcoin?

I know both implementations make use of decentralization, but is Bitcoin using any technology that was developed by Bittorrent?
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25 views

Can't sync to Bitcoin Network

I'm a newbie to this community. I have been trying to download all the blocks and be a full node, but I cannot connect to peers. I checked my firewall and there seems no problem, and tried to add node ...
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1answer
39 views

Can a descriptors wallet be encrypted?

Bitcoin Core provides a builtin feature by which Berkeley DB Bitcoin Core legacy wallet files can be encrypted with a passphrase. Can the same or similar be done to Bitcoin Core descriptors wallet ...
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1answer
89 views

Unable to use I2P on Ubuntu 20.04 / 21.04

I configured the I2P according to this answer on Ubuntu 20.04 and 21.10. But I have been getting the following error when I try to connect to any I2P peer: I2P: Error connecting to ...
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1answer
44 views

How can I use RBF to replace a transaction sent from Bitcoin Core?

How do I resend a transaction with RBF on a Bitcoin Core node v.19 or v.20. I am running it on Ubuntu.
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66 views

Is it possible to run a full node lightning network bitcoin core 22.0 on a 32 bit computer?

I have an old pc with Atom N270 that I would like to use as full node, how can I do that?
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1answer
31 views

Flag -deprecatedrpc=addressess - Bitcoin core

How long do we will have the -deprecatedrpc=addressess flag for Bitcoin core. Is it just for the v22.0 or will it be available for all minor and patch releases until v23.0?
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34 views

developing hd wallet using bip32 and bip 39

I'm developing a HD wallet using C#. I want to use this wallet for multiple blockchains like bitcoin, ethereum, dogecoin etc... I've read that I should use bip32 for my wallet. i know what's bip32 but ...
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24 views

existing solution to build a bitcoin address-balance index

I've a full node running in a AWS vm. I want to develop an app which would be able to provide balance for a given btc address. I know blockchain.info and blockexplorer.com exists but I want to do my ...
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19 views

Ternary Merkle Tree - concatenation and Merkle Proof?

Unlike binary Merkle trees, ternary have 3 leaf nodes. I wanted to understand how do we eventually get to the Root Merkle node -- is it by concatenating in the pair of 3 (considering 3 leaves in every ...
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about the bitcoin, is the new block create by a miner need all other miner verify?

Actually, I have other questions... 1.is the new block create by a miner need all other miner verify?if not, how many miners need to verify and the block main chain can +1? 2.I know bitcoin has four ...
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1answer
38 views

Getting "Unknown wallet records: 1" on loading wallet

I noticed that loading this wallet: loadwallet ...wallet name... The wallet is a 169900 legacy wallet. 2021-..-..T..:..:..Z [...wallet name...] Keys: 0 plaintext, 4355 encrypted, 4355 w/ metadata, ...
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Bitcoin Core 21.1 still no coin for me?

I have it setup i think on Windows 10 64 bit setup the wallets and encrypted it its been running solid for 8 hours and my bitcoin is showing 0.0000000 BTC still both available and pending what am i ...
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63 views

how are new bitcoins created [duplicate]

I have read that new bitcoins are generated by a competitive and decentralized process called "mining" i want to know how the first coin was generated? From where is it genrated? Mining is ...
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UNIX END TIME January 19, 2038 - Will it affect Timelock nLOCKTIME smart contracts past that date?

So UNIX END TIME is January 19, 2038. What will happen then to the btc TX that looks at Unixtime for nLOCKTIME transactions? Will any Locktime transaction past that date, say to 2040 be an issue? Or ...
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How can I create P2TR addresses with Bitcoin Core 22.0?

I'm trying to test P2TR with Bitcoin Core, and I don't know how to get taproot addresses. How should I create them using 22.0?
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Why is Bitcoin Core 22.0 not on bitcoin.org?

I just updated Bitcoin Core wallet. I wonder why the latest version on bitcoin.org is 21.0, while on bitcoincore.org the latest version is 22.0. Why is 22.0 not available on bitcoin.org? Is it okay to ...
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Transfer Bitcoin Core data into a database

I've downloaded Bitcoin data locally via the Bitcoin Core app install and sync. I'm looking to build a system though which users can query their account balance. I'm thinking of building a simple web ...
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1answer
48 views

Can Bitcoin Core 0.9.5 still fully sync?

Solo Linux GPU bitcoin miner here (doing it for fun not profit so please, no 'what's the point' answers). Working mining software for this purpose is far and few in between, but I have been able to ...
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1answer
58 views

public key to private key using HASH TABLE (Pollard's kangaroo for SECPK1)

I have done a little bit of research on HASH TABLE (Pollard's kangaroo for SECPK1) I was wondering if there is any way to extract the private key range using the public key or the public address..??
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BTC synchronization in Bitcore

I had kept some BTC for for synchronization in BITCORE but now I need money, so want to SELL my BTC but the process of synchronization is still going on..... In that case can I stop the process of ...
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1answer
80 views

How can I Recover my Lost Bitcoin [duplicate]

how can i recover 3.617BTC i Lost to This investment Website , i invested in bitcoin on the website ""Coinfoxltd.com"" through one of their account mangers Julia Adam. I tried to ...
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40 views

Just to be sure, the downloads at bitcoincore.org are the safer ones?

(more than bitcoin.org?) And a few more questions regarding this: Why did they change the naming of the versions from 0.xx to xx.0? (latest update changed from 0.21 to 22.0). Why they did not add ...
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33 views

Bitcoin price history data [duplicate]

I need to get the Bitcoin price historical from when it started till today to generate graph and I don't won't to use any third party api. How this big companies are getting this Data From where are ...
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50 views

Decode Raw Bitcoin Hexadecimal Transaction

I have been using this excellent site one amongst many that offer to Decode Raw Bitcoin Hexadecimal Transaction....https://live.blockcypher.com/btc/decodetx/ Well, the site was down for a bit and that ...
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1answer
19 views

How to accept the payment with regtest?

I sent some BTC via the regtest network from one wallet to another, and I don't see it using getbalance, but I do see it if I use the command getbalances as untrusted_pending: { "mine": { ...
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52 views

What do I tell my company IT dept so they allow my bitcoin core container to connect to other nodes

I work for a corporation therefore work behind a corporate firewall. I login to their vpn then I access company resources like mails, IMs etc. As a internal team project, I'm trying to setup a btc ...
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1answer
76 views

Why isn't it safe to run bitcoin core on a laptop?

I have read on some twitter posts that it was not safe to run bitcoin core on a laptop. That it was better to run it on a rasberry pie for example. What are the main reasons this is not safe? How ...
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27 views

Corrupt block found indicating potential hardware failure; shutting down

I am experiencing issues with both Bitcoin Core 0.20 & 0.22 on my 2020 iMac per the title. I have run diagnostics (shutdown and +D) and on black startup screen it says "No Issues found. ...
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1answer
62 views

macOS Monterey refuses to open Bitcoin Core.app because Apple cannot check it for malicious software

Today I upgraded to macOS Monterey. First, the new OS deleted "Bitcoin Core.app". So, I re-downloaded the signed .dmg. Second, Monterey refused to open "Bitcoin Core.app" saying &...
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1answer
39 views

Getbalance amount 0 aftering generating blocks with bitcoin-cli

After starting bitcoind bicoind -regtest -daemon then i load one of the wallets i created bitcoin-cli -regtest loadwallet "wallet-name". The wallet loads fine but no matter how many blocks i ...
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59 views

Can a wallet start with 20 and how can it be generated?

Someone claims a wallet can start with 2 on btc mainnet. How possible is dat. I knw 2 is the testnet pay 2 script wallet type. If its possible. How can it be generated?attached is an example of the ...

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