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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56 views

Bitcoin core wallet's security

When running a bitcoin node on an enterprise level: a lot of addresses will be generated with getaddress RPC for users to send their funds to. As far as I understand, these addresses, as well as the ...
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48 views

How to transfer BTC balance when I have Private Key? [duplicate]

I have BTC public address and privatekey with balance. Can I Transfer the balance for another address?
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48 views

bitcoind bulk import private keys to different wallets and update with one rescan

I was wondering if someone already has this thoughts or problems: I generate bitcoin addresses and private keys by a script - to not depend on the bitcoin daemon and manage them in a database. By ...
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94 views

I mined in early 2010 with a cpu miner and just found my keys after forgetting all thease years, no joke need info please

who is the best most reputable bitcoin recovery company? I have added details and questions about our situation below Thank you And God Bless what was the mining program from the devs back then? I ...
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14 views

Bitcoind is not running properly in centOS server

I just try to setup full node in centos(Linux distribution) server. I download binary for Linux from https://bitcoincore.org/bin/bitcoin-core-0.17.1/ . I just start bitcoind using the following ...
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1answer
60 views

How to verify signature of multisig transaction

How to verify signature of multisig transaction (2-2) after it being signed by first owner? How can I understand if that owner used wrong private key => wrong signature?
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36 views

Running Bitcoin (core dameon full-node) on IPFS vs NFS?

I've tried running numerous Bitcoin daemon's concurrently over an NFS solution (namely LizardFS) using XFS instead of ext4. It only reached about 60% of its potential before all daemon's crashed. This ...
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1answer
82 views

Is there's anyway to get fee estimation with vbyte instead of KB using “estimatesmartfee” RPC command?

I'm using Bitcoin-core RPC command to get current fee rate, but it returns the fees in KB, I would like to get fee rates in vbyte is that possible?
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26 views

Bitcoin core transaction catching for enterprise

I'm trying to implement a system where users of my application receive a deposit address to which they would be able to deposit any amount of Bitcoin at any given time. They would also be able to ...
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4answers
190 views

Notify when new transaction is arrive in a bitcoin address [duplicate]

I have bitcoin full node on the server. I need to notify when new incoming transaction is arrive into a bitcoin address. Is there any RPC will help to achieve my goal ... Any help is appreciable. ...
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1answer
401 views

Could Neutrino technically as side-effect, incentivize centralization of the bitcoin network?

TWO questions on Neutrino:: 1) Could Neutrino technically as side-effect, incentivize centralization of the bitcoin network? Or other formulation: ...hinder higher degree of decentralization? Why ...
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63 views

How can I generate public address from an xpub key in Java?

I have an xpub key with which I want to generate all addresses which have been used or will be used and then find out the keys which have balance. Here's a sample xpubkey with balance- ...
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1answer
47 views

Confirmed transaction but unspent

Hi, I have a serious issue as this transaction is successful but the recipient insists that it's not in her wallet neither did she get any sort of confirmation about the transaction, I have been ...
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63 views

Exception CompactSize when I parsing the blk file >= 976

I wrote a bitcoin core parser, for my personal project and because it helped me to start understanding the bitcoin protocol as a data structure. This project mainly parsers every blk file and creates ...
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1answer
102 views

What's the distinction between BIP 157 and BIP 158? Are they supported by Bitcoin Core?

BIP 157 and BIP 158 are both concerned with Compact Block filters. What is the distinction between them, and which of them does Bitcoin Core currently support?
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41 views

Stripped segwit data

I have two client Bitcoin, 0.17.0 and 0.12.0 and I want to see the difference between the same transaction. 0.17 has segwit, 0.12 doesn't have. If I do that RPC call in 0.17.0 /bin/bitcoin-cli -...
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2answers
49 views

Logic thread between output folders and input transactions

I'm studying the bitcoin protocol and I don't have very clear things, for example the logical thread that exists between an output transaction and a subsequent input transaction, where that output is ...
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1answer
33 views

Hash rate, transaction and block relationship

I'm aware that when the hash of the block header (block hash) is below the difficulty target, a block is deemed as validated. But because I've never run a bitcoin node before (will soon), I had a ...
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1answer
53 views

Differences to CCompactSize and CVarInt

I'm developing a parser bitcoin core and I have a problem whit the type CVarInt, I using the decodifier mode of the CCompact size but at the block 976 I Have a problem whit the type, because the value ...
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119 views

Recovering wallet after formatting SSD

I am not exactly sure what I need to do and I do not want to accidentally overwrite my disk. I may have already done so. After searching my web history I have found the BTC address that my BTC is on ...
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1answer
26 views

Is mining using with cpu(some web sites) fake or not

There is a rule about every browser : Browser can not access client's RAM-CPU-HARD DRIVE-WEB CAMERA-And other resources of client's machine. Am i right? So how some web sites do mining using client's ...
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20 views

My transaction has been on pending for 48hrs [duplicate]

Please I need help and I need to know how long it will stay and I don't change my transaction fee
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1answer
103 views

Export Xpubkey from Bitcoin Core

How do I export my HD wallet's Xpubkey in Bitcoin Core? Do I construct it using the value of "hdseedid" returned by getwalletinfo?
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1answer
94 views

I formated my hard drive with bitcoin core on it

First timer here ...I downloaded bitcoin core a few weeks ago until last week where it still had not synced so i started all over...I was originally waiting for BTC CORE to synchronize(I missed the ...
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1answer
61 views

Script Null into raw trasaction bitcoin core

I'm developing a parser for bitcoin core and into the alpha test of the parser,I noticed than the script bitcoin core are null and the hash raw transaction exist. An example: for this transaction the ...
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2answers
62 views

What are the web3py equivalent for communicating with bitcoin in Python?

I am fairly new to working with Python, I have a requirement where I need to perform some basic bitcoin operations on my local system rather than relying on some external API's, those function mainly ...
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22 views

HashRate After 24 hours reduce

I Have two whatsminner m3x , when I start mining hashRate be 12 , after 24 hours hash rate be between 2 and 3 , and I don't know why?? what I must to do? , my device connect to Slushpool
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19 views

Listaccount CLI command shows balance, but getbalance shows different balance

I was sending some coins to myself using sendtoaddress, through the address I created using ./someBTCfork-cli getnewaddress When I run ./someBTCfork-cli getbalance "" My balance is 4999 When I ...
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33 views

Is 10K full nodes enough to bitcoin to avoid 51% attack?

As I know bitcoin has about 10K full nodes. And the question is in my mind is that: This number is not huge! If someone has 6K servers, Can control the bitcoin via 51% attack? I was thinking if ...
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1answer
37 views

Can bitcoin core verify a third party blockchain download?

If you were to obtain a copy of the bitcoin blockchain, i.e. a copy of someone's data dir excluding his wallet files on a removable drive or other storage medium, could bitcoin core verify that or not?...
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1answer
44 views

Batching transactions to safe on fees

I have some bitcoin spread across multiple addresses. I would like to move these to different addresses. I've heard about batching and was wondering if it is possible to batch the transaction to ...
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41 views

What happen When use -maxtxfee and -mintxfee with bitcoind

I read some document about -mintxfee and -maxtxfee. I apply this to my regtest network using the following command ./bitcoind -txconfirmtarget=6 -maxtxfee=0.00005 -mintxfee=0.00005 My question is ...
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1answer
33 views

How can i verify my txs with my own full node?

Hey i run a full bitcoin+lightning node on a rpi. Can anyone eli5 me how can i verify my own tx if send some coins from an exchange to a public address i control? Lets say i plug in my hw, send some ...
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1answer
41 views

Automatically close the bitcoin-qt when enable SSL for RPC

I Just try to enable SSL for bitcoin-qt RPC call. I follow the SSL on RPC link to archive my target. But I am getting the following error and close the bitcoin-qt automatically. I am using the ...
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24 views

How to decrease target difficulty in bitcoin source (v0.8)

I have followed this video series ( https://www.youtube.com/watch?v=mDGxGYvkDEE ) to create an alt-coin by forking Litecoin v0.8, which i followed the videos and successfully created an altcoin. Now ...
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2answers
250 views

Mining Difficulty and Leading Zeros

I understand that the Bitcoin mining problem is to find a string s (hash of previous block + Merkle Tree Hash + nonce) such that sha256(s) has n leading zeros, where n determines the mining difficulty....
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2answers
69 views

Bitcoin Core frozen trying to sync and/or connecting to peers

I downloaded Bitcoin Core directly to my laptop and sent BTC to what i believe is my wallet. The BTC is no longer in my senders wallet and I do not see it in my bitcoin core wallet. It was working ...
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1answer
43 views

Do bitcoind and bitcoin-qt resume blockchain downloading from the same place?

This is a multi-part question. I downloaded source code of bitcoin core from github and compiled it on my Windows 10. Then I got bitcoind and bitcoin-qt among other commands. I first run bitcoin-qt ...
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89 views

Why doesn't Bitcoin-core Wallet app transmit payment?

Why doesn't Bitcoin-core Wallet app transmit payment? Bitcoin-core Wallet app no delivery transaction. From the 18th of March to the date Bitcoin-core Wallet app retains my satoshis with the message ...
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47 views

How to create a node to a private blockchain using Bitcoin core

Is it possible to create to connect to a private bitcoin chain with bitcoin core? I created a private bitcoin chain through regtest on one vm. Now I want to make a full node copy of it on a separate ...
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1answer
129 views

BTC and BCH receiving addresses

UPDATE ONE: It seems I might have answered my own question. I took an address generated on bitcoin-core 0.17.1 to a BCH ATM and it would not get accepted as a valid address. I then took the same ...
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1answer
69 views

Are addresses which start with 3 multisig addresses?

I've just downloaded bitcoin-core 0.17.1 and it seems all the new receiving addresses I create start with 3 instead of 1. I always thought addresses which start with 3 were multisig addresses. ...
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0answers
116 views

How to sign bitcoin raw transactions with Python offline

I have a raw bitcoin transaction created using createrawtransaction unsigned_tx = "...
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0answers
66 views

Create a multi user web wallet using bitcoind RPC call

I just a beginner in bitcoin technology.I planning to create a multi user bitcoin web wallet using a VPS full node setup(Not use minig). I read the RPC documentation and found something for archiving ...
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1answer
31 views

Import wallet or transfer coins

Say if I am changing from CoPay to Bitcoin Core, is it recommended that I try and import my CoPay's private keys to Core, or just send the coins over to my Core account.
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1answer
44 views

How to differentiate between sending and receiving address in blockcypher api result?

I am using BlockCypher's API to get a list of transactions for a bitcoin address. I need to maintain a record of IN and OUT transactions from this address with time and transaction hash. However, I am ...
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1answer
39 views

How to model randomness in validators selection in PoS?

I searched a lot here and on the Internet to figure how how randomness selection of validators in PoS works? I understand it is a random selection based on fraction of stake a validator has, similar ...
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1answer
39 views

Data for time a transaction spent in a pool before it got added to a block

Is it possible to collect data for when an transaction was added to the pool to when it was added to the block?
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1answer
2k views

Warning: Unknown block versions are being mined! Unknown rules may be active

Best regards. What's going on internally when I get this warning. Warning: Unknown block versions are being mined! Unknown rules may be active Bitcoin Core version v0.17.1 (64-bit) Thank you
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1answer
45 views

Bitcoins didn't arrived

3-4 days ago, I transferred bitcoins from Virwox to my Electrum wallet, but this bitcoins didn't arrived, what can i do? 1JPSVx7hjcu7rR2Vr6nyz7z8mok3yryGZ