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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772 views

Just installed bitcoin, but it won't connect

Total newbie at bitcoin; long time Linux user. kubuntu precise 64: My first attempt was just to download it (a slightly older version than the one from the ppa below), untar it and run the executable....
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663 views

Ws2tcpip.h and winsock2.h on Window QT Wallet

Been trying for the past few days but couldn't get it working, I already download the latest cryptopp library but its seems that maxcoin got some issue compiling If I qmake "USE_UPNP=-" maxcoin-qt....
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538 views

What JSON RPC commands are suitable for a multi-tenant wallet service?

I'm looking at the JSON-RPC commands available in the QT client so I can create a multi-tenant wallet service on top of it. In other words, people would sign up for my site and have the ability to ...
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238 views

What limitations are there to creating a Bitcoin client on Google App Engine?

I want to create a Bitcoin client on App Engine with equivalent protocol functionality to bitcoind. With the new Sockets API available in Python and Java I believe this would almost be possible. The ...
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99 views

bitcoin files mysteriously show up in trash

I'm usually pretty good at figuring things out, but this one has me stumped. Yesterday I saw 5 or so (don't remember exactly) bitcoin-qt(something).gz files in my trash that i had NOT sent there. It ...
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2k views

Importing a backed-up encrypted wallet.dat

I have bitcoin-qt-0.8.1-beta installed on a computer. I also have another computer in which I'd like to share the same wallet. First, for backup purposes, I have exported the wallet into a backup ...
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248 views

Bitcoin-qt database for BitcoinJ downloadBlockChain()

I am using bitcoinJ to develop a bitcoin based payment module for my project. I have the complete block chain downloaded/in sync with the network on the bitcoin-qt client. Is there a way I can use ...
2
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1answer
508 views

What is the required input for python-bitcoinlib getrawtransaction command?

I am running a bitcoin node on my machine, fully synced with RPC commands enabled, rpc server live and txindex=1. In the command-line I can run the following RPC call and obtain the information ...
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34 views

Manipulation of Bitcoin RPC with programmatically

I'd like to use Bitcoin source code(only RPC part) to manipulate with programmatically. I have bitcoind and bitcoin-cli installed in my local computer but I don't know how to write code for my ...
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1answer
34 views

How to install Berkeley DB 4.8 on Linux?

The Unix build notes do not show how to install version 4.8 apart from saying BerkeleyDB is required for the wallet. Ubuntu and Debian have their own libdb-dev and libdb++-dev packages, but ...
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48 views

Is it possible to use Bitcoin-core for multisig? Can it handle change addresses?

I have tried to import three xpub in a watch-only wallet as keypool with importmulti and a multisig output descriptor and to fill the first address with some BTCs. When I try to spend the newly ...
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31 views

Automatically restarting bitcoind five minutes after reboot on ubuntu

How can I run bitcoind automatically five minutes after restart? So far I have crontab set up to reboot my computer every morning at 4AM (it runs into issues when it stays on for more than a couple ...
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32 views

How to add money to my Bitcoin Wallet and send my first Raw Transaction with OP_RETURN using bitcoin-cli

Background So after reading these two articles (Learning Bitcoin from the Command Line and Mastering Bitcoin), I am trying to piece together how I can get my first transaction with OP_RETURN data ...
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17 views

Would appreciate some help getting datadir parameter to work in Linux Mint 19.2

I am trying to use Bitcoin Core 0.18.1 on Linux Mint 19.2. I have previously used an older version on Win7 with no problems. I have moved my old data directory to a new ext4 partition on an internal ...
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2answers
53 views

Is it possible to change private key

I would like to know if it's possible to change private key of bitcoin wallet via rpc call to bitcoind. Thank you for your answers
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1answer
42 views

Is Bitcoin Core required for wallet projects?

My team wants to create a cryptocurrency service provider platform to Sell/Buy BTC and something else in form of web/mobile app. It's about one month that I have been studying different articles about ...
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89 views

Bitcoin Private Key Decryption

At present, I have dumped my wallet and have all private key, address information. I am now wanting to understand the decryption process for the private keys within the wallet. I have completed the ...
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1answer
30 views

Why is getdescriptorinfo returning an error “Invalid descriptor (code -5)”

I am using Bitcoin Core bitcoin-cli with getdescriptorinfo like so: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getdescriptorinfo", "params":["sh(multi(2,[3c60330a/1]...
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1answer
64 views

Bus error (core dumped)

Running a new install of Ubuntu 18.04.3 LTS and downloading blocks in bitcoin-qt up to over 70% when pgm quits with "Bus error (core dumped)". Anyone else gets this or how to fix it? (-rescan didn't ...
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1answer
33 views

Why can't a user import keys to the keypool for a blank wallet?

I am creating a blank wallet with the intention of adding keys to the keypool but get an error keys can only be imported to the keypool when private keys are disabled Why? It would be beneficial for ...
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60 views

Why am I getting error: “Signature must be zero for failed CHECK(MULTI)SIG operation” when using signrawtransactionwithkey

I am using descriptor based importmulti like so to import a 2 of 3 HD multisig cold storage wallet into my node: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "importmulti", "...
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108 views

Any method to check balance of particular address in bitcoin core (0.18) using json rpc?

Setup bitcoin core (0.18) in my local node.In new version maximum methods are deprecated.I create new address using json rpc method and send some coin s on it.Now I am unable to check the balance of ...
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1answer
49 views

Where can I download bitcoin core version 0.16.0

I changed my passphrase around march 2018 and now I can't use my new passphrase on the new bitcoin core version. When I put the back up wallet.dat into the new versions of bitcoin core, it tells ...
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27 views

Bitcoin SPV not able to fetch transactions

I am developing a Bitcoin wallet SPV and using 3rd party SDK for the same. However, I tried to create wallet and it gets successfully created and I can also restore those wallets but amount and ...
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1answer
26 views

How to re-connect to `bitcoind -printtoconsole` after socket timeout?

I started bitcoind with the option -printtoconsole to check for errors and my terminal ssh connection was timed out during the night - probably because my computer was in hibernation. I see that the ...
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0answers
29 views

Unknown command name and packet magic for bitcoin packets at the start of blockchain transactions

Recently I captured a part of blockchain when my bitcoin wallet started to syncing for the first time. I analyze about 10 Gb of traffic which was for primary transactions of bitcoin. wireshark can ...
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1answer
48 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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0answers
63 views

Bitcoin Core Blockchain Sync Fatal Internal Error - Corrupt Block - Linux

I'm trying to perform the IBD on Bitcoin Core 0.18 and I continually receive "Fatal Internal Error" at seemingly random intervals, closing bitcoin-qt and preventing me from fully syncing. Farthest I'...
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34 views

Can't inititate network handshake with my full node

I am running a custom Python script to initiate network handshakes with other nodes. While testing the code I decided to initiate an handshake with my own node but I am getting a timeout error. ...
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69 views

demonstrate tracking some bitcoin transactions with a program like an explorer

Recently I started to read BITCOIN protocol and it's events when a transaction created. I want to create a program a bitcoin explorer. as you know probably, Each non-coinbase input spends an outpoint ...
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1answer
59 views

How to handle multiple transactions from the same account(address)?

I am new to bitcoin so please bear my question. To understand the IN's and OUT's of this crypto world, i am creating a dummy bank to have a better understanding of the system. So I have a bitcoin ...
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0answers
54 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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153 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
57 views

Wallet error ErrorFile=… /testnet3/wallets/db.log

I want to use two deamon for sync mainnet and testnet. I Run $ bitcoind for mainnet without problem After I run $ bitcoind -testnet But I get this error BerkeleyEnvironment::Open: LogDir=/home/...
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33 views

How i can connect to bitcoin core light server?

Need a bunch of Laravel + Bitcoin Core. Need a light version of bitcoin bark. Installed as follows: sudo apt-get install build-essential && sudo apt-get install libtool autotools-dev autoconf ...
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0answers
62 views

Does bitcoin dust fee rule or policy activate in bitcoin testnet?

Does dust fee rule activate in bitcoin testnet? I create a tx in testnet with output is dust,the tx always relayed and go into block, but in main net it report dust transaction error. Why bitcoin ...
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60 views

Why does my public IP show a Bitcoin Node is running when it is set up over Tor?

I've set up my node to run exclusively over TOR. But when I check https://bitnodes.earn.com/ and a few other sites with my public IP to check if a bitcoin node is accepting incoming connections, it ...
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0answers
55 views

Can I transfer it from the wallet file of blockchain.com?

Can I transfer it from the wallet file of blockchain.com? Since trouble continues at blockchain.com, I want to transfer it to bitcoincore.
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0answers
52 views

What is the best way to test new consensus protocol?

I wanted to test a new consensus protocol. However, the bitcoin core is a large codebase (>100k lines). Is there any small codebase which is designed to test new consensus protocols and includes only ...
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0answers
30 views

What is the cheapest way to pull the data from bitcoind/bitcoin-core?

I am wondering if there is a cheap way to scrape the bitcoind data. I am using a remote server and cannot spend too much time running this program otherwise it would be expensive. I am wondering if ...
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0answers
60 views

Upgrading v0.14.2 to the latest v0.17.0.1 for 3 active wallets on one device

I am using a laptop dedicated to bitcoin, with bitcoin core installed, and switch between 3 active wallets. The switch is done using backups of all the files (including ‘wallet.dat’), held in ‘%...
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0answers
42 views

UTXO are not being listed while they have conf over 100 (btcd + simnet)

I am using BTCD and while in Simnet, I generated 104 block (Best block : 104) But when I listed utxos, transaction from block 3 and 4 (which have 102 and 101 confirmations) don't be listed. So balance ...
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0answers
57 views

Bitcoin core read-only

I have system where users can generate addresses and bring some coins, and get bonuses after. I want to make my core read-only. For this I have a second bitcoin core which have not connected to ...
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0answers
187 views

Blockchain testnet Websocket

Please, how do I subscribe to blockchain testnet web-socket for an address. I seem to find that for livenet, any help?
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121 views

Even with dbcache=7000 and 16 core processor. Why does -reindex-chainstate take more than 24+ hours?

My computer got shut off due to a power outage and when I rebooted my bitcoin core it was stuck on connecting to peers. I was told to do a -reindex-chainstate with dbcache set as high as possible. ...
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0answers
17 views

Moving 'Sent' Transaction from Default Account

I would like to move a sent transaction from the default account to another account held on the same wallet. I am using version 0.16 so I still have the depreciated accounts functionality. I'm not ...
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0answers
144 views

Estimated number of hashes

This is not a duplicate of previous, similar questions I've read on StackExchange, since none of those questions, nor the answers, go into the difficulty theory, as espoused on the Bitcoin Wiki. ...
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0answers
106 views

It's October 2018. ./bitcoin-qt -reindex-chainstate takes forever. Is there a way to speed this up?

Current version: Bitcoin Core 0.16.3 I think I have a corrupted blockchain download as my VM box was shut down in the middle of syncing. Which is why I'm doing a -reindex-chainstate I have the ...
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0answers
19 views

Paying to one address using inputs from multiple addresses under same seed

I am using bitcoin core and I was wondering. If I make a bitcoin payment using bitcoin-cli which has about 50 addresses registered to it. If the payment is for 1 BTC and I pay from the address A1 (let'...
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1answer
427 views

RPC Command to send from multiple accounts to one account (default - “”) in same wallet

I have small amounts in multiple accounts in the same wallet. I want to send all of them to default account (usually named as ""). Is their any RPC command available for this scenario? Thanks in ...