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
73 views

CScript to CPubKey or derive CPubKey from CScript

Please can someone advise if it is possible to derive the CPubKey from a CSript object? Provided i get it up with an address before hand, I can use numerous functions to attain all the info from the ...
2
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1answer
8 views

Why doesn't the Bitcoin-qt client ask for the Wallet passphrase upon startup?

I've just encrypted my wallet.dat file using the "Settings -> Encrypt Wallet" menu option. I then closed the client and re-opened it. I was expecting to be prompted to put in the wallet password ...
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1answer
22 views

bitcoincore additional questions

Following up from my previous question, I still have some questions left. Does it really work if I turn off the internet before doing getnewaddress? Will it really give me something real and can get ...
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1answer
6 views

Loading seed coins in test mode

I'm setting up a regtest node on my Windows machine using bitcoin-qt. Here's my config: regtest=1 txindex=1 server=1 [test] rpcport=8332 rpcuser=ulu rpcpassword=*** Next, I would like to run a ...
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1answer
200 views

Watch only address not update balance

After adding watch only address to my bitcoin core and perform some transaction that make my watch only address balance to 0, but when i run getbalance and listaccount with watch only is true, my ...
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1answer
19 views

Should we wait 10 minutes to confirm a transaction

I have read this proof of work calculation takes about 10 minutes. That mean people who are making the transaction should wait 10 minutes ? Let's imagine i want to buy a drink with bitcoin. The ...
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1answer
20 views

Mining operation calculation

My goal is to understand bitcoin. I have read what happens during a transaction and have a question about it: When a transaction happen, the miners compute a value called "prof of work". This value ...
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1answer
34 views

Running bitcoin node with already verified blockchain

I'm following this guide https://stadicus.github.io/RaspiBolt/ to setup a bitcoin full node on my new raspberry pi. I already downloaded and verified the blockchain on my host machine. I also pruned ...
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1answer
43 views

gettransaction cannot get address where it send from

Hi i have test few time with gettransaction method, it seem only show full detail about transaction when send inside node. But if i send from another address outside my node, gettransaction only show ...
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1answer
41 views

bitcoind and bitcoin-cli and bitcoin-qt

following the hackernoon for full node btc, https://hackernoon.com/a-complete-beginners-guide-to-installing-a-bitcoin-full-node-on-linux-2018-edition-cb8e384479ea i have some small questions, is there'...
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0answers
11 views

MacOS: How to run Bitcoin Core GUI after building from source?

I built Bitcoin Core from source by following this guide: https://github.com/bitcoin/bitcoin/blob/master/doc/build-osx.md And got it running on the command line via: ./src/bitcoind Screenshots from ...
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1answer
58 views

Virus warning in Bitcoin [cash] ABC client?

I tried to download Bitcoin cash ABC wallet from bitcoincash official site. If I download zip to my computer and upload it to VirusTotal site, it says 11/62 positives. If I go to VirusTotal site and ...
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1answer
11 views

bitcoin node startup daemon with created wallet

When I restart the Bitcoin node, I would like to load the wallet I created in the "wallets" subdirectory. bitcoin-cli createwallet "1" bitcoin-cli listwallets -> result : "", "1" bitcoin-cli -testnet ...
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1answer
53 views

Bitcoin / Crypto and exchanges!

When we buy/ sell bitcoin through some exchange say "Koinex in Indian context", what is the process i.e. actually followed ? 1. Does exchange communicate to node(s) in the bitcoin blockchain thru my ...
2
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1answer
11 views

How run c-lightning with the local node bitcoin

I have a bitcoin-core-18.0 with on my linux mint, and I don't have downloaded the bitcoin with the ppa but I downloaded the official zip directory on site bitcoin. Now my question is, c-lightning ...
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1answer
46 views

Cheap way to attack the bitcoin block chain [on hold]

Just for educational purpose but might come in handy sometime, what is the cheapest way to attack the bitcoin block chain? is it possible for a block with at least one confirmation to be orphaned ...
2
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1answer
650 views

Bootstrap.dat on Mac OSX 10.9 - Difficulty

Been trawling through a lot of information (I know this similar issue has probably come up a fair bit) on this issue and going round in circles a bit. I am not the most tech savvy individual, and ...
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1answer
26 views

Issue with sendrawtransaction missing inputs error code -25

Working with Bitcoin-qt 0.16.3 testnet Attempting to sendrawtransaction, however, receive following error: Missing inputs (code -25) From what I have read, this results from attempting to use ...
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0answers
14 views

Bitcoin Core Question, Initialization Vector

I am reviewing Bitcoin Core source code. I am following the code which states take a double sha 256 of the public key to get the IV and use the master key for the encryption key for encrypted wallet....
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1answer
583 views

Running a bitcoind docker

Thanks to the bitcoin.stack community I have successfully launched a bitcoind docker with an external volume which has the block data Currently its in 100% sync but I am facing an issue to get ...
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0answers
41 views

Checking my bitcoin wallet after two years I find that my bitcoin (0.5 bitcoin) is gone [duplicate]

After checking my bitcoin account after two years, 0.00010757 of a bitcoin remains even though I explicitly remember having half a bitcoin left. My first thought someone somehow stole it. But after ...
4
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1answer
30 views

Which parameters in the Bitcoin Core config file need to be set correctly prior to IBD?

The majority of the parameters in the Bitcoin Core config file can be changed during or after IBD (Initial Blockchain Download) with no complications. However, there are some parameters in the config ...
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1answer
89 views

Get input address using VIN txid?

I have written following script to get Vin address from Vin txids. #!/usr/bin/python # -*- coding: utf-8 -*- import requests,json url="http://asd:asdf@localhost:2332" payload={} payload = {"jsonrpc":...
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1answer
328 views

Did I lost my balance by using an old wallet.dat?

I saved a copy of my wallet.dat as a backup, i used it to transfer 1 btc to another address, now it's got 1 btc less in the total. now I deleted the wallet.dat and open the wallet with the saved ...
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2answers
31 views

Some questions on segregated witness

I have some question on how segregated witness work. I'm reading this post and in the answer exist this phrase Since signature data (witness data) is stored outside the transaction (and outside ...
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2answers
27 views

Transaction from bitcoin core is different from the explorer

In tx 3a4a7087d4ece4503948b33aa77c807cda770575d229cbcb7dd8336ffa77445a the unique input is 1387e35f2c65f6664e15a98a43b7a70831e636635876a7154c99f38d89a9f795 with index vout = 1. When I request this tx ...
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1answer
74 views

Wallet shows 0.00000000 btc

I’m running a Antminer S9 for a week now Just today the wallet finally synchronised but shows 0.00000000 btc 🤔 why?
4
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1answer
287 views

Syncing bitcoin node with multiple cores

I'm syncing my node on 32 CPUs, and it's super slow. Obviously, syncing doesn't go in parallel. I wonder if there is any fundamental obstacle for "divide and conquer" way of doing it. So let's say ...
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1answer
102 views

Sync bitcoin transaction status to local database

I am sending bitcoin transaction in node js via bitcore-lib and bitcore-explorers. I realized that when i call the function .broadcast to send the transaction to network and returns value, it means ...
4
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3answers
52 views

Bitcoin core full node - Should I choose my peers or it's fine to use the hardcoded ones?

I have a full node v 0.17.1 running 12-14 hrs/day and I was wondering if it's helpful, for privacy or for whatever reason, to add peers (maybe from https://bitnodes.earn.com/nodes/leaderboard/) with ...
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1answer
27 views

How do I monitor a bitcoin blockchain explorer?

I wanted to monitor some four to five bitcoin blockchain explorers ( actually I want to monitor ZEC block explorers as well but starting with BTC as of now). I want to know how do I monitor them - ...
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2answers
811 views

bitcond and bitcoin-Qt system configuration and bandwidth requirements

What is the best operating system configuration for a computer to run (bitcoind or bitcoin-Qt) and (BFGminer or CGMiner) under Linux, assuming that it will be connected to a 3 Terrahash mining rig on ...
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1answer
1k views

How to send Bitcoin in the Testnet?

I'm using this library: https://github.com/lian/bitcoin-ruby And here's my code: require 'open-uri' require 'net/http' require 'net/https' require 'json' require 'bitcoin' Bitcoin.network = :...
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1answer
6k views

How can I benefit by running a full Bitcoin node?

I noticed that I can run a node with Bitcoin Core. If I open my computer always and make the full node run on my device, what benefits can I get? Is there any reward for serving this?
2
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1answer
124 views

Upgrade from Bitcoin QT 0.8.5 to latest Bitcoin Core 0.15.X

I bought and transacted BTC in 2013/2014. I had a Bitcoin QT 0.8.5 wallet. I plugged it in and it updated correctly to the latest block. It correctly showed my BTC balance. I made a transaction ...
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1answer
168 views

Manually create a transaction to spend the output of a P2SH tx

I want to manually create a transaction to spend the output of a P2SH tx, but I don't know where the redeem script should be placed in the new transaction? I followed an online tutorial Building a ...
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1answer
39 views

How do block explorer sites show information that is not available on Bitcoin Core?

As I understood in the following post How to get unspents for a specified bitcoin address?, we should use listunspent only on addresses that belong to our own wallet otherwise will return blank. But ...
3
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2answers
211 views

What is the safest way to rename my altcoin from “bitcoin” to “myaltcoin” in the source code? [closed]

Some Context I am creating my own altcoin for learning purposes and have successfully built the bitcoin code from source with my own genesis block. Now is it time for me to change the name of the ...
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2answers
246 views

how to fix Bitcoin core 14.2 on Windows 10 Home 64bit ver.

I cant install Bitcoin Core 13.2 thru 15.01 64 bit on my window 10 64 bit system it worked ver 14.2 worked before I tried to sign into coinbase that emailed me an address that needed to Identify my ...
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0answers
17 views

Cannot compile Bitcoin and dependencies. Raspberry pi 4

I'm trying to compile Bitcoin and its dependencies on a Pi 4. The process: - git clone the repo on an external SSD I mounted (path /mnt/ssd/sources/) git clone https://github.com/bitcoin/bitcoin.git ...
2
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3answers
90 views

CHECKSEQUENCEVERIFY After x time of last transaction

Is there a way where i can have a multi-sig address which will allow one of the signers to use only their single key after a set amount of time after each transaction/update on the address? I want ...
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2answers
82 views

Is it possible to generate(mine) a block with specific transaction via bitcoin-cli on regtest?

I want to generate a block with specific transaction via bitcoin-cli on regtest. The "generate" command does not have the option. It collects transactions in mempool by the default rule. I guess I ...
0
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1answer
160 views

How to retrieve transactions in realtime from bitcoind .dat files

I want to get all the data from blocks as they get updated on my local node. Abe offers very poor performance, and fast-dat-parser creates other .dat files and doesn't have enough documentation for me ...
7
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2answers
2k views

No menu in Ubuntu bitcoin-qt

When I run bitcoin-qt on Ubuntu 12.04, I see this: As you can see, there is no menu on the top menu bar. There is the "beginning" of a menu with the word "Bitcoin" but there are no "File", "Settings"...
2
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1answer
748 views

Run bitcoin-qt at startup of Windows server

I am running bitcoin-qt on my server. I use .Net library to query it through windows services. It all works when I start bitcoin-qt manually. But if the server is restarted, I see that it is running ...
4
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5answers
5k views

Allowing Incoming Connection on Bitcoin Core

Good Evening, I recently installed Bitcoin Core v0.12.1 on my home server (running Windows 7) and wanted to allow it to accept incoming connections and used the guide found here: https://bitcoin.org/...
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1answer
107 views

HD wallets and multisig

Is there any standardized way to define HD wallet accounts used to participate in multi-signature transactions? How do existing multisig wallets derive their keys from the seed it? How is Bitcoin Core ...
3
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1answer
1k views

How to build Bitcoin binaries for Windows on Ubuntu using cross-compile

I am trying to build Bitcoin 0.13 for Windows. I've always used this guide for building previous versions. Now seems that developers have changed their mind regarding Windows, and the new way seems ...
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0answers
20 views

find bitcoin wallet owner [duplicate]

I received a black mail threat that a hacker would post all account access information of my accounts (bank & email information) online and on all social networking sites if I didn't pay $5,000 of ...
2
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1answer
129 views

What happens to a node if .bitcoin/chainstate is corrupted?

I tried to search for answers to my questions, but didn't find any, but please forgive me if this is a duplicate question. Suppose somehow .bitcoin/chainstate gets corrupted, e.g., a UTXO is deleted. ...