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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Python Code - import error : cannot import name “privtopub” from 'bitcoin'

Hello everyone when i start this code on PYCHARM looks like no problem. But when i turned this code to from python to exe and exe dont start and it says : import error : cannot import name "...
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Is there a way to change Bitcoin Open Source code to be more Environmentally friendly?

If Bitcoin is open source as proponents mention, why can't make Bitcoin as environmentally friendly as Ripple, Dogecoin, Cardono etc? Elon Musk tanked the market by mentioning Dogecoin is More ...
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1answer
32 views

How exactly does bitcoin code change happen in a decentralized system

I have long been under the assumption that bitcoin was just a "protocol" or a "contract“. Different nodes run their own implementation, on different hardwares. Some are efficient, some ...
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Bitcoin Core's mempool policy and inherited RBF

Why is inherited signalling not implemented in Bitcoin Core's mempool policy as mentioned in BIP 125 or implemented in btcd? Inherited signalling: Transactions that don't explicitly signal ...
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1answer
48 views

Different address prefixes for different address types / network combinations

I'm working on a bitcoin project, and understand the differences between the wallet address which start with 1, 3, or bc1. I am looking to generate a wallet address that starts with 1. I have seen the ...
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20 views

Get/Calculate Address

Im currently using a program that analyses the block files. It splits all the stuff into mutliple .csv files. Is there any method i can do to get the addresses & amount sent/recieved from tx_in ...
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21 views

Arbitrage Opportunity for Miners

I am thinking of the arbitrage opportunity for the miners by reordering or any sort of manipulations in transactions waiting for confirmation. I observed such a case in Ethereum(a paper), but not ...
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1answer
35 views

In Bitcoin core 0.21 which command replaces getaccountaddress

In Bitcoin core 0.21, which command replaces getaccountaddress? Is there any way to get the same data as getaccountaddress in 0.21?
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Why isn't this Lightning Network (or something similar) way more heavily promoted? [closed]

Every time I think about the fees for Bitcoin transactions, I'm shocked. They have made it impossible for me to launch my project since nobody in their right mind will pay as much in fees as for the ...
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1answer
22 views

Is it correct to say that continuous transactions are on different blocks most of the time?

I'm new to the idea of bitcoin and I'm taking an introduction course about it. Given the following picture from the original bitcoin paper, is it correct to say that continuous transactions are on ...
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1answer
18 views

Bitcoin - Level DB - Block Index - Parsing value for block hash

I am trying to read the value against block hash in level DB of Bitcoin node database - Block/index. For Genesis block, I get 88 bytes which I want to parse. I tried to follow instructions in https://...
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1answer
35 views

Accessing bitcoind from python module hits error

I am experimenting with the blockchain a bit, specifically trying to use the python-OP_RETURN module to put a few bytes into the blockchain op_return field. To use this module I blv I need a running ...
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1answer
48 views

I found 10 different wallet.dat files on my computer. How can I tell which has money in it? Bitcoin-core-qt

In cygwin I did "find / -name wallet*.dat" and found 10 wallet*.dat files on my Windows box. Some have 2005 dates, some are newer. Q: How can I determine which one has the money in it?
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How to decrypt encrypted_privkey

Background how I got here: I have a very old wallet file in .dat format (from 2017) The backup is as far as I remember just a copy of the wallet file from bitcoin-core's ~/.bitcoin directory. I tried ...
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1answer
33 views

Where change the size of the window in Bitcoin code?

I already try changeing the height and width parameters of the forms in src/qt/forms but nothing changes, where else i need to look?
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wallet.dat corrupt. Try using the wallet tool bitcoin-wallet to salvage or restoring a backup

I'm trying to restore an old wallet, using bitcoin-qt 0.21 but I'm getting the following error on startup: wallet.dat corrupt. Try using the wallet tool bitcoin-wallet to salvage or restoring a backup ...
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1answer
18 views

Why are adresses not showing up in gettxout?

I have a bitcoin node but whenever i try to gettxout i get this response: user@bitcoin:~# bitcoin-cli gettxout "0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098" 0 { "...
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32 views

How can i locate my deceased husbands bitcoin? [duplicate]

My husband passed away 4 years ago and he bought a lot of shares in bitcoin when it first became a thing. How can i find out who he purchased these through in order to accuquire about his shares?
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1answer
27 views

Bitcoind information about the input and output

Im trying to get the wallets/accounts the money got sent to. But getrawtransaction does not give any information about the reciever or sender
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29 views

Debugging does not work after v0.21 tag

If I clone Bitcoin Core from the repository and switch to version v0.21 (git checkout tags/v0.21.0), the debugging (gdb src/qt/bitcoin-qt or gdb src/bitcoind) will work as expected. But If I clone the ...
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1answer
21 views

listtransactions weird offset workflow

I need to extract last wallet transaction. But seems listtransaction has some wrong logic. When I perform this function listtransactions '*' 50 9 it just return me first records not last. In my case ...
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0answers
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DB Structure for bitcoin blocks

https://github.com/blockchain-etl/bitcoin-etl#schema I found a library to parse the block data in json format. I want to parse that json and put it into a db to then use that for calculating balances. ...
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1answer
21 views

aftet sending btc with bitcoin core can i exit after wards?

I have bitcoin core installed on windows with full node running. If I send bitcoin do I need to wait its confirmation before exiting bitcoin core ? can I exit in seconds afterward will it be confirmed ...
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1answer
36 views

How to create a physical/paper backup for bitcoin-core wallet?

I am using bitcoin-core for my offline storage. In electrum I can do a paper backup by writing down the mnemonics. bitcoin-core seems to be using a different mechanism to generate the wallet. What I ...
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25 views

Im in desperate need of some advice!

I moved money from my wallet to someone elses wallet over a year ago and they said they never recieved it. Im now desperate to track the money down. Ive found it. But its sitting in a wallet and I ...
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1answer
30 views

How do Blockchain Explorers lookup wallets? [Balance]

How do Blockchain Explorers lookup wallet balances? Im trying to make my own explorer. For example Bitcoin-cli does not have a method (function) to lookup a wallets balance. listtransactions does not ...
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1answer
67 views

When you make a Bitcoin transaction, can the receiving person (and the world?) really see how much coins you have in the entire wallet?

I really hope that I've got this horribly wrong, but I have to ask... I have this idea, which I base on comments and explanations I've heard over the years, that when you make a Bitcoin transaction, ...
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27 views

how to forking for Dogecoin? [closed]

Hello I want to create my own altcoin from dogecoin cource please tell me if anyone have idea how to do that thank you.
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1answer
34 views

How to quickly get the target of the next block to be mined from bitcoin-core over RPC?

The target for the next block is available in getblocktemplate but I can not figure out if there is a way to get the target without also getting all of the pending transactions, which can take a very ...
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Why Bithumb Global Recent Results are Different Than Orderbook [closed]

I am very new to BitHumb and I did not understand the following via looking the UI for BCH-USDT: By looking to order book I could say there should be no exchange until the orders match but there you ...
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1answer
1k views

Should I be worried that bitcoincore.org now suddenly only provides an “unsigned” Bitcoin Core installer?

My security script for downloading and verifying new versions of Bitcoin Core barked at me the other day, when the new v0.21.1 was released. (Which still is nowhere to be found on bitcoin.org, BTW.) ...
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1answer
32 views

Why does bitcoind have to listen to the public internet when supporting lnd?

I have been part of experimenting with setting up a system to send and receive lightning network payments. The system uses bitcoin-core (bitcoind) and lnd. Initially, the system was set up on a home ...
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2answers
107 views

Bitcoin Fraud/Recovery Protocol Proposals

Does Bitcoin plan to implement any Fraud/Loss Prevention in their protocol? I just read a story of how Brokerage Exchange Shapeshift, and Internal Employee stealing private keys from their customers. ...
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2answers
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Did Bitcoin founders know Bitcoin is not scalable at Base Layer?

Given Bitcoin takes 45 min per Transaction, and consumes lot of energy (around 1 million Visa transactions), https://digiconomist.net/bitcoin-energy-consumption/ This is more of a history question, ...
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1answer
51 views

Multisig Setup - Pruned Bitcoin Core on Computer vs. Dedicated Hardware

Are there security implications of running a pruned Bitcoin Core node on a personal computer vs. a full Bitcoin Core node on a dedicated hardware device (i.e. Raspberry Pie with Umbrel, myNode, nodl, ...
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1answer
27 views

Check transaction per block in Bitcoin

what is bitcoin-cli command for checking how many transaction per block ? Thanks you
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1answer
12 views

What to look for in Bitcoin-core logfile when something bad happens

About a week ago I was trying to reorganise my file structure with Bitcoin Core, I accidentally moved the file before listing it as a backup so when I opened Core, it didn't work. I tried returning ...
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1answer
22 views

Bitcoin core trying to sign a transaction loaded from psbt file, but getting “could not sign any more inputs” error

I am trying to sign a transaction loaded from psbt file, but I'm getting could not sign any more inputs error. I did it successfully on the first try. However I cannot do it any more now. I changed my ...
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2answers
93 views

If Lightning Network takes transactions off Blockchain, would that defeat the whole purpose of having a Blockchain ledger?

Currently Bitcoin transactions can take around 45 minutes. If everyone in the world uses Bitcoin, computers would have to consume 1000 of terabytes per Hour. The solution is the Lightning network, ...
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27 views

Sent transaction on 30 march 2021 still unconfirmed in mempool what can i do?

I made small BTC transaction from my bitcoincore wallet to account of Binance on March 30, 2021. I did set the fee low. But i wait a month for the transaction to back to my wallet. But it said still ...
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1answer
27 views

Can I see the workings (console) of my bitcoin full node?

I have just completed the IBD of my bitcoin full node on Bitcoin Core on Linux. When I open Bitcoin Core, i just get the basic wallet interface. It there anyway of seeing what the node is doing behind ...
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1answer
36 views

Multisig Wallet Setup - Security Tradeoffs With Pruned Bitcoin Core Node?

What are the security tradeoffs of running a pruned Bitcoin Core node for a multisig wallet, such as Specter? It seems that using a multisig wallet with a pruned Bitcoin Core node could be a good ...
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0answers
17 views

Is bitcoin client really downloads the full transaction info? [duplicate]

I started learning bitcoin and found this wiki: https://learnmeabitcoin.com/beginners/network And there is this statement: When you run the client it will connect to other nodes and start downloading ...
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2answers
58 views

Will Bitcoin copy Best Features of Litecoin, Ripple, if its Open Source?

Proponents of Bitcoin always mention that Bitcoin is Open Source, so if any better cryptocurrency comes along, Bitcoin can just copy those features in their open source. Both Litecoin and Ripple have ...
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How can i know which utxo in my wallet will be sent?

Assuming that i have several utxos in my wallet. Can i know which utxos will be sent when i request a transaction? For example, there are 3 utxos in my wallet: 3 BTC, 5 BTC, 7 BTC. when i send 1 BTC ...
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1answer
38 views

Help about BitlyCore

Please I need help. I want to know if anyone knows about BitlyCore.com I have been running the full block for days now and it's just stuck at 87% please I need help.
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1answer
38 views

What is the difference between signrawtransactionwithwallet vs signrawtransactionwithkey in signing unsigned raw transaction?

I have a bitcoin address generated in bitcoin-core (offline computer) I imported that one address into electrum as a watch-only wallet (online computer) From electrum I created an unsigned transaction ...
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14 views

How to upgrade Bitcoin Core on Mac OS with binaries from tarball?

I want to upgrade to version 0.21.1 from an older version I built from source. However, it is unclear to me how I can upgrade using the .tar.gz file that's available from the Bitcoin Core website. I ...
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0answers
23 views

Bitcoin core balance won't show up!

I have bitcoin core wallet i havent use since 2013. i let it sync fully now but it won't show my bitcoin balance and this shows up..... Warning: Unknown block versions being mined! It's possible ...
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1answer
36 views

Public Bitcoin Nodes? [No API]

i've been searching for hours now. Also on StackExchange here. Are there any public nodes that i can connect to using jsonrpc? I want to lookup stuff (im not into generating priv keys or anything) but ...

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