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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1answer
52 views

Bitcoin Core Wallet doesn't accept my passphrase

I am using Bitcoin Core Wallet .21 and have encrypted my wallet. When I try to send some coins it asks for the passphrase, which it says is incorrect. I have only ever used one of two passphrases and ...
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2answers
81 views

Found Bitcoin Core Wallet with unconfirmed Transactions, anything to salvage? [duplicate]

I am currently looking through old .dat files and found a wallet with two "Received with" transactions that are unconfirmed. When I enter the address from the Label on blockchain.info the ...
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1answer
47 views

I can not find a clear mathematical proof method with details and example for “near to zero chance of generating the same pair key wallet”

A mathematical proof method with details for "near to zero chance of generating the same pair key wallet" I can not find a clear mathematical proof for the top sentence with example
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Does the protocol ensure that pair keys wallet are unique? [duplicate]

What mechanism for proof unique pair keys (public key and private key) when creating a wallet with several sources(such as "wallet.btc.com", "wallet.bitcoin.com", "www....
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2answers
57 views

Bitcoin Core: Unit Test Failure: system_tests.cpp: Line 48 BOOST_AUTO_TEST(run_command)

I cloned the Bitcoin Core and did the build. But, I am experiencing a Unit Test Failure in system_tests.cpp, Line 48 BOOST_AUTO_TEST(run_command). First, my environment: Hardware: Intel i7-8550U @1....
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84 views

Why universities and charity don't accept Dogecoin or Bitcoin donation?

I just tried to contact the top universities in the USA and other countries. i also contacted the charity organizations such as Red cross and united way, etc. but no response at all. seems they don't ...
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23 views

Where can I find a high performance search capabilities in a Bitcoin node implementation?

Where can I find a Bitcoin node implementation, which is capable of thousands of searches per minute, without degrading performance of the node? I am aware of two Bitcoin node implementations. ...
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27 views

bitcoin-etl: problems with installing

I am trying to install bitcoin-etl: https://github.com/blockchain-etl/bitcoin-etl to analyze bitcoin blockchain. I have Mac OS and python3, I run this in terminal: pip install bitcoin-etl Also tried ...
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1answer
18 views

How can I load a specific private key into my wallet

Starting a Private Node using bitcoin-qt. And then I generate a pair of keys for my own testing. But unfortunately whenever I reset the node, it will generate a new pairs of keys, it makes my ...
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Btc sent is yet to be received for over three weeks it was sent from a coinme wallet to a binace wallet [duplicate]

It’s been really hard understanding what happened Here’s the transaction HASH https://www.blockchain.com/btc/tx/b4a8e885988b8694dcccdaab83456d23544604b19be1f2bef376884f3e5bcd34
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1answer
111 views

Ubuntu Linux, Unable to set bitcoin datadir to a folder in different drive

I am trying to run a bitcoin node. I want to set the datadir to a folder located on drive other than on which I have installed ubuntu. Folder I want to set as datadir: /media/spider/Utils/bitcoin ...
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1answer
152 views

Bitcoin-qt getnewaddress returns address starting with 2

I am expecting it starts with '3' the the results below: getnewaddress "" "p2sh-segwit" 2NFcKJTPZs1syYhwaBkXty6Vt6FEKxD3HTC Is this because I am running on a private block chain?
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How to get private Keys from Wallet using bitcoin-qt

createwallet "MyWallet" getwalletinfo { "walletname": "MyWallet", "walletversion": 169900, "format": "bdb", "balance": 0....
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1answer
104 views

Error compile bitcoin mac OS

I have straggle to compile bitcoin core on mac OS machine. it has an error as the following: /usr/local/include/QtCore/qglobal.h:667:65: error: expected '>' typename = std::enable_if_t<...
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Connecting Ledger Nano X wallet to my Bitcoin node

I've been trying to connect my Ledger nano x to my bitcoin full node following this instructions by Ledger. I have configured the bitcoin.conf file as follows: prune=0 txindex=1 server=1 daemon=1 ...
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1answer
71 views

Is it actually possible to secure your coins while also allowing access to “near and dear” when you die?

I have my wallet.dat files encrypted, stored on a computer which in turn is encrypted. All storage devices where the files are backed up to are also encrypted. I strongly doubt that any human could ...
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1answer
27 views

Add bitcoin payments to java app using BitcoinJ

I need to add Bitcoin payment to my application using the BitcoinJ library, but I'm new to using Bitcoin. I have one thought To create a new address for each new user, but I don't know if this is the ...
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1answer
69 views

Is it safe to rent server to run a full node?

I want to rent dedicated server to run a full node to receive bitcoin for my website. Is this safe if I encrypt my wallets or should I own physical server?
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1answer
112 views

bitcoin payment has big fees

I am using the bitcoin-rpc and everytime i create an invoice from a PHP script, i create a new address. All is ok, i get the money after, i have a script that checks number of confirmations, then when ...
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16 views

How to make transaction with NBitcoin?

I was working on sending bitcoin from one address to another. I followed this article: https://programmingblockchain.gitbook.io/programmingblockchain/bitcoin_transfer/spend_your_coin#sign-your-...
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15 views

How to make Bitcoin Core mark receive addresses which have been used?

Looking in the list of receive addresses I've created, I can't see any indication of whether or not any of them have been "used", that is, received any coins ever. This is important ...
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1answer
20 views

Question about Changing Passphrase

In Bitcoin Core, the previous password is required in order to change to a newer password. Is this previous password used simply as a proof-of-ownership key (that doesn’t do anything but show proper ...
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0answers
66 views

In concrete terms, how do I start using Lighting Network right now?

I have Bitcoin Core installed on Windows and it's fully synced. I am able to send and receive Bitcoin payments. I hate the fees and waiting, so I want to use Lightning Network. I've spent countless ...
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1answer
41 views

Is there a limit on the number of characters in a wallet.dat file?

I want to try to recover my wallet.dat file which has a small amount of Bitcoin, and I was wondering whether there was a character limit for passphrase encryption, or whether the app allows you to use ...
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1answer
13 views

Possible To --enable-wallet After Syncronization With Blockahin?

I am running bitcoind from the command line (--without-gui) and my system apparently does not have the correct Berkley DB version (4.8+). Therefore, I chose to run the program without the wallet ...
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1answer
79 views

Is it possible to send Bitcoin without the passphrase to the wallet?

I’ve been getting back into cryptocurrency lately, and I’ve found one of my old wallet.dat files with a very small amount of BTC. Unfortunately, I created a random password of characters and put it ...
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1answer
47 views

What do these memory configurations in debug.log of BitCoin Core represent?

In the debug.log file of BitCoin Core, the cache configuration is described as follows. Cache configuration: Using 2.0 MiB for block index database Using 8.0 MiB for chain state database Using ...
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1answer
105 views

How to get info for public address from bitcoin-cli + local db? (Can it be done without creating a wallet?)

I just started running my own full node. IBD is finished, and I'm now learning how to use bitcoin-cli. First I would like to extract all the available information for one or more public addresses ...
3
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1answer
431 views

Setting up lightning with bitcoin-core

I have some questions about bitcoin-core and lightning-network-daemon. I have succesfully set up a bitcoin node running on Ubuntu Server 20.04 by following this tutorial: https://bitcoin.org/en/full-...
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What is the relationship between LevelDB's cache (default 8MB) and Bitcoin's UTXO cache?

Please correct me if I am wrong. Bitcoin uses levelDB to store UTXO set. LevelDB has a default 8MB block cache, and the Bitcoin also has a dbcache(default 450MB). What is the relationship between the ...
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28 views

How to Transfer Real BTC From My Wallet to another account using C#

Hi I wanted to send BTC from my wallet to another wallet through any C# Library. Currently i am using NBitcoin Library to perform this action. But, i am not able to get through it. Thanks
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where is transaction confirmation number in bitcoin source?

I have try to check in bitcoin source code. i want to see confirmation number code but i have not found. where is transaction transaction confirmation number in bitcoin source ? how to update it ? ...
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1answer
146 views

bitcoin-core automatic coin selection

for business reason i need to use the bitcoin-core (v0.20.1) automatic coin selection feature and few days ago i saw a transaction come out that left me puzzled, it was like that: input 0.00017[...]...
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53 views

What is base58Prefixes in Bitcion?

what is base58Prefixes[SCRIPT_ADDRESS] ? when we use it ? base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5); How to generate value base58Prefixes[SECRET_KEY], base58Prefixes[...
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1answer
97 views

How to correctly create and import a SegWit paper wallet

I use Bitcoin Core to create SegWit paper wallets for friends and family. After creating the wallet via the GUI, the steps I take are as follows: getnewaddress # Carry this public key back to the ...
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59 views

How to use the configuration file to change the database cache size of Bitcoin Core GUI?

The cache size is 450MB by default. How to use the configuration file to change the cache size?I know that it can be changed directly through the UI interface. But I want to know if using ...
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1answer
66 views

Are there any existing tools to measure the time required for block and transaction validation?

The validation time of transactions and blocks has a great impact on the performance of the Bitcoin network. Are there any special measuring tools that can be used?
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20 views

Is it possible to retrieve lost wallets from 9 years ago by downloading a full node? [duplicate]

Purchased bitcoin in A few years ago. Forgot/lost wallet addresses,and email . Is it possible to retrieve my wallets from then by downloading the bitcoin node ?
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1answer
41 views

How to Recovery passphrase bitcoincore

i dont remeber my passphrase of my bitcoincore wallet. I try with an hex editor but i don’t know wich string i have to search. how can i recover it? Thanks to all can help me. I’ve followed some post ...
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2answers
97 views

How to create a transaction without broadcasting

I would like the create a transaction without broadcasting it to the network.
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0answers
49 views

Sent money from Bitcoin Core to mobile Electrum and for 3 days can`t recieve it

3 days ago I made transaction from my Bitcoin Core to my mobile Electrum but I didn't receive any money yet. I can't see this transaction in Electrum and on Blockain,Tradeblock either, however, ...
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0answers
71 views

Generating zero-amount transactions in regtest mode?

I'm setting up a larger test network of regtest nodes in which all of them should be easily capable of creating blocks and sending transactions. To this end, I'm looking for a simple way for the nodes ...
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1answer
99 views

I'm worried I have lost my BTC from sending on my BTC Core 0.13.2 wallet

I would truly appreciate anyone's help. I have a BTC core wallet, it's 2 years behind on the blockchain update. I previously sent a couple of test sends for 0.01 BTC each quite a while ago, end of ...
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0answers
29 views

Questions RE soft forks

I’m trying to understand how the Bitcoin network works a bit better and the main thing I’m having trouble with is forks, particularly soft forks. I have a few questions about how exactly a soft fork ...
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1answer
23 views

Search and delete bitcoin core and other related files to reduce attack surface

Do we have any option in Bitcoin Core to search files used by it? Or any option to delete all such files? Are all important files deleted when uninstalling Bitcoin Core? Should we remove such files ...
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64 views

Coinjoin in Bitcoin Core wallet

I was reading this quesion: How to properly combine PSBTs for CoinJoin? And Bitcoin Core issues: https://github.com/bitcoin/bitcoin/issues/6568 https://github.com/bitcoin/bitcoin/issues/3226 ...
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26 views

wallet not working [duplicate]

an old hard drive use on a new computer, not working but providing code EXCEPTION: N5boost12interprocess22interprocess_exceptionE The system cannot find the file specified. F:/Wallets/Bitcoin/bitcoin-...
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0answers
34 views

Bitcoin cli Error: too few parameters OS X Big Sur

I'm running Bitcoin core,I struggled for bitcoin conf file till I found this and this is what I just have in it server=1 rpcuser=username rpcpassword=password rpcallowip=127.0.0.1 rpcport=1300 I have ...
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1answer
74 views

Lost Bitcoin from Bitcoin-core after resetting PC [duplicate]

The other day I reset my PC and I have lost all my BTC. Is there any way I can get it back? (using Bitcoin core)
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1answer
39 views

How to split fee between more than one miners?

I found that some BTC blocks have more than one miners, for instance: https://www.blockchain.com/btc/block/000000000000000049a0914d83df36982c77ac1f65ade6a52bdced2ce312aba9 there are two miners: ['...

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