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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Why has Bitcoin Core started acting up of late? [closed]

I couldn't tell you the exact time when this started, nor exactly all the things I've tried since, but I never had this kind of issue before, and I've been running it for a long time on many ...
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Confirm Licenses for Bitcoin Core for new book by Oxford University Press

I hope that I can get you or someone else familiar with the licensing of Bitcoin Core to assist me. You can reach me at mark.radcliffe@dlapiper.com I am writing a chapter in a book entitled on Free ...
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1answer
29 views

How genereate pub key from priv key ? algo

How to generate pub key from prive key ? All examples and explain skip this. but i dont need steps to address etc . i only need steps from priv to pub ( compressed or not ) what using at that. if ...
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What is in the Bitcoin Core LevelDB dbcache? Is it full records or metadata?

What is in the Bitcoin Core LevelDB dbcache? Is it full records or metadata? This question was asked on IRC by Anonymous.
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ElectrumX returning 0 balance

I have a running full bitcoin node (txindex=1). I also setup electrumx and it has fully synced with current blockchain state. Here's the log : INFO:LocalRPC:[2] RPC 127.0.0.1:44806, 0 total ...
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1answer
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how and when does block and transaction validations take place?

I have a couple of questions and will try to explain them here. So, let's say we have 4 nodes in the whole network. one of the nodes (node A) took transactions from pool. before they put it into a ...
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1answer
17 views

How do I view information on the peers my Bitcoin Core full node is connected to?

I would like to view information on the peers my Bitcoin Core full node is connected to. How do I do this?
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1answer
33 views

What should I do with my crippled Bitcoin Core? How can it be this unstable still after 10+ years?

Recently, I've had serious issues with my Bitcoin Core. I've installed old versions and reinstalled the new version and done everything to debug it, but it's just crippled. It either gets stuck ...
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2answers
19 views

Change IBD Location Prior to Download

I'd like to run Bitcoin Core but my laptop can't handle the load. I have an external drive with enough space, but I'm unsure if/how to change the file destination upon opening the program. Is this ...
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2answers
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Unable to createrawtransaction - “Input not found or already spent”

I need help. I have createrawtransaction as per the screenshot but then, unable to signrawtransactionwithkey, I have insert WIF Private Key and it state that "Input not found or already spent&...
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What happened to Bitcoin Core v0.20.1?

About 11 days ago, I updated to v0.20.1 of Bitcoin Core from their "official" website (https://bitcoin.org/en/download). Ever since, it's been syncing every day but just keeps lagging behind....
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Bitcoin users limit

How bitcoin handle users limit if only 4000 transactions in every 10 minutes ? Let's say I transfer 2 bitcoin to Anuj account then how much time maximum it will take to reflect in Anuj's account and ...
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1answer
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How to Create or Generate a New UTXO in Bitcoin Core?

I know how to use Console in Bitcoin Core but not that expert. I would like to ask is there possible for me to generate or create a new UTXO in Bitcoin Core? All I have with me are the list of TxID ...
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1answer
32 views

IP Addresses of inbound connections in bitcoin full node (TOR) looking as a localhost (127.0.0.1)

I run bitcoin full node (mynode) through TOR and I see that inbound connections appear only as a localhost with varying ports usually in high range (examples 127.0.0.1:35010, 127.0.0.1:58188, 127.0.0....
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Is there some sort of decentralized digital bank project? [closed]

I have lost 100% of my remaining trust in the "traditional" banks, especially after they recently removed the only remaining method to even automate fetching my account balance. I'm ...
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2answers
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Stopping bitcoind on mac

One of my kids while learning more about bitcoin started bitcoind on my mac. Now I am unable to stop it. In my activity monitor, it shows a process named "bitcoind". I have stopped that ...
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1answer
29 views

Need Help about Console in Bitcoin Core

I would like to ask the following. I've downloaded Bitcoin Core and just start using their "Console". Before I can createrawtransaction, I need to first set up a node in Bitcoin Core, right? ...
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1answer
35 views

How to run Bitcoin Core as onion service on Windows, Ubuntu and Android?

Have you tried running Bitcoin Core listening on Tor on different platforms? What are your experiences, issues that you faced, hacks, workarounds etc.?
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Why does estimatesmartfee and walletcreatefundedpsbt with conf_target show a wide disparity?

Seems that when my testnet node boots up estimatesmartfee works just fine generally: {"jsonrpc":"1.0","id":"curltest","method":"estimatesmartfee&...
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1answer
19 views

Importaddress and conf

I'm wondering if its possible to add imported addresses into the bitcoin conf file. So, rather than calling the cli with importaddress, I would add the address to the conf file, with say, ...
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12 views

How can I see a non-wallet transaction in Bitcoin core [duplicate]

If I run the command gettransaction "txid" in Bitcoin core with a transaction id that doesn't belong to my wallet, I get "Invalid or non-wallet transaction id (code -5)". I can see ...
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1answer
161 views

Securely erase a previously used address from bitcoin-core

I'd like to completely delete an address from bitcoin-core, in such a way that someone who obtains all the data on my computer could not find out I ever used that address. Is it enough to delete ...
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1answer
32 views

Calculate block hash is different in regtest?

I'm able to calculate the block hash in mainnet and testnet, but I don't get the right hash in regtest. I mint +3000 blocks and I get the block with height 3000 bitcoin-cli getblock $(bitcoin-cli ...
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1answer
28 views

Can't be verified by Mac OS

Brand new Mac Mini, latest macOS Catalina (10.15.6 (19G2021)), followed instructions on bitcoin.org download page. Double click Bitcoin Core.app, and I get: “Bitcoin Core.app” can’t be opened ...
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BTC sent to multisig address, but no info about this in bitcoin core (listsinceblock, getwalletinfo, listunspent)

I sent BTCs (testnet) to multisig address: address: 2N8yzozJh1DFgrnND7TbSbuSQ1NPA8byQDu transaction: 2453fe904b74acbbf541f98d2d5a1d7a509457a3df10bf38d0c3cb9326734dcd But my bitcoin core does not ...
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1answer
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restore wallet using hd seed before 0.17.0

Hd wallets are supported from v0.13.0. Currently it is easy to save hd seed and restore a wallet from it (due to changes in v0.17.0 and v0.18.0): dumpwallet (read hdseed from it) createwallet (blank ...
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Who were the Bitcoin maintainers before 2014? When did maintainers gain/lose merge access? [duplicate]

The Bitcoin lead maintainer and co-maintainers have merge access (i.e. they can approve changes to Bitcoin source code). We can see who the maintainers were since 2014: https://github.com/bitcoin/...
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1answer
32 views

how to get a seeed wallet in bitcoin-cli? [duplicate]

hi how to get a seed wallet in bitcoin_cli ? I use a bitcoin-cli sethdseed but error :invalid private key please help me
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36 views

Study bitcoin core source code

I have read a lot of documentation and books where they explain the general functioning of Bitcoin and I think that the time has come to study the source code of Bitcoin core. I have knowledge of c++ ...
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using -reindex-chainstate in the cmd

I have a problem with my full node bitcoin core, it was working fine, and after restarting my computer, it shows an error with reindex So to solve the problem i usedreindex-chainstate Is it normal if ...
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22 views

Error opening block database Full node

For some reason my node shutdown and now I get when restart it Error opening block database here my bitcoin.conf txindex=1 reindex=1 reindex-chainstate=1 # Accept command line and JSON-RPC ...
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1answer
43 views

Where can I find the core binaries for v.0.1.5 to v.0.3.21?

I have been looking for core binaries (i.e. win32-setup.exe & win32.zip & macosx.zip) for earlier clients. Any advice on where they are hosted? They have all been removed from SourceForge. ...
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1answer
253 views

How do merkle trees ensure credibility to blockchain, when full node wrongly denies a presence of a txn in a block?

How can Merkle Trees ensure that a full node doesn't lie to a thin node that a txn t is not present in a block B if infact B contains t? How can a thin node tell if the full node is lying if the full ...
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1answer
36 views

Does Bitcoin Core validate signatures by default?

There have been claims recently of Bitcoin Core not validating the signatures in a block by default. If this is true, can Bitcoin Core even claim to be a full node?
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33 views

bitcoind: How to get rawblock data with ZeroMQ

I am trying to use the zeromq api for bitcoind to get rawblock but its not working with the code I've provided below. I am able to get hashtx and rawtx if I remove the filter but not hashblock and ...
6
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1answer
169 views

How does Bitcoin Core know it's on the longest chain?

In trying to implement a client, I am wondering what is the most efficient approach to figure out if you are on a fork. Let's say you pick a peer at random and go through IBD using the headers-first ...
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0answers
30 views

Does the mempool size as reported by Blockchain.com include the size of txs only?

Does the mempool size as reported by (for instance Blockchain.com) include the sum of the 'size' of transactions only? Or does it also include the overhead (due to indexes, allocation overhead, ...
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1answer
33 views

How to realize dependent transactions seating in the Mempool?

I am trying to find out the relation among dependant transactions in the Mempool. I have already used the "depends" field and tracking the transaction ids to go through. but I still can not ...
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3answers
40 views

How exactly does “CoinDance” determine the current number of public Bitcoin nodes?

On this URL: https://coin.dance/nodes It says how many public Bitcoin nodes are currently active in the world, and how many Bitcoin Core ones. While it's good that I can grab these numbers from that ...
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1answer
27 views

Bitcoin Core Address

Hi how can I look up my bitcoin-core address. I have generated multiple addresses to received bitcoins but when I look them up in a bitcoin explorer they do not show the balance I see in bitcoin core. ...
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1answer
44 views

Bitcoin Core private key import

I would like to import the private keys from a multisig paper wallet to Bitcoin Core. My aim is to convert the paper wallet to an electronic wallet and to be able to export the corresponding wallet....
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1answer
30 views

How is a multisig transaction transferred between multiple signers?

I'm trying to learn more about doing multisig transactions. The examples I've seen show the signing of the transaction with 2-of-3, or 3-of-3, where the signatures are added, essentially, at the same ...
2
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1answer
32 views

Does testmempoolaccept check all possible rejection rules?

Is there any rejection rule that testmempoolaccept will not check, or is it safe to assume that if it passes testmempoolaccept validation it will be at least broadcast? Mostly concerned about complex ...
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13 views

How to import multisig private keys

I've been trying to import my multisig paper wallet to Bitcoin Core. I am in possession of the private keys and the redeem script. The private keys are in uncompressed WIF format (i.e. start with a '5'...
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2answers
28 views

How to raise the bad-txns-vout-negative error?

I wanted to replicate the bad-txns-vout-negative error scenario. I tried the following but getting 'Amount out of range' only: Here is the command i tried: bitcoin-cli -named createrawtransaction ...
2
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1answer
75 views

How can I verify the BTC supply with my own node?

With all the supply talk going on I wanted to verify the active supply on my new node I got. What is the best way to "run the numbers" I am running a raspiblitz node.
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12 views

Are there any good websites to recommend? thank you [duplicate]

Knowledge about Bitcoin, as a beginner, what to learn. Is there a good website to recommend? About bitcoin.
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1answer
27 views

Using maxuploadtarget in Node Window Console

Complete first-timer to setting up my own node here... I’ve got as far as downloading and syncing the node (on Windows PC), getting my router and anti-virus ports sorted, but want to limit my upload/...
3
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2answers
400 views

What exactly does the scary option “Allow incoming connections” do in Bitcoin Core?

Software authors seem to enjoy consciously freaking me out by having vaguely or entirely uncommented options in their software with very ominous labels. In Bitcoin Core's settings, it says "[X] ...
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How to transform mnemonic to hd seed accepted by Bitcoin Core [duplicate]

How to transform mnemonic to hd seed accepted by the sethdseed command? Thanks

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