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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 ...

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391 views

How to get notification on bitcoin receive with bitcoin core

How can i get bitcoin receive notification with bitcoin core. I have tried walletnotify and blocknotify options. walletnofity is fired two times when i send bitcoins & receive bitcoin. And with ...
3
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45 views

Bitcoind 0.5.3 stuck at block 364,670 - what to do?

I compiled bitcoind using the same steps as last year. In particular I set DB_CONFIG: set_lg_dir database set_lk_max_locks 537000 Unfortunately once I hit block 364,670 (2015-07-10) I'm treated with:...
3
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0answers
531 views

To sign raw transaction in Segwit

I am using Bitcoin core 0.14.1 testnet. I created a Segwit address. transfer some coins to this address. Now I want to spend it. I created a raw transaction using console command i.e. ...
3
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0answers
294 views

Bitcoin core accounts deprecated, now what system i implement to make use of accounts?

I am designing one of the bitcoin based app on Bitcoin core using account system. Accounts i have used to store users wallet balance in different accounts. But since i know it is deprecated, then ...
3
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0answers
183 views

Bitcoin Core 0.13 How many addresses it can **effectively** manage?

I want to know, what's the maximum amount of addresses that Bitcoin Core 0.13 can manage? All addresses should belong to the default account. I want to use walletnotify feature How startup time ...
3
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0answers
306 views

How to ignore balance check to cancel unconfirmed transaction (double spending)

I need to cancel a transaction that was sent without fee (using Blockchain.info). It is currently "Unconfirmed". The only way I have found is to do a double spend of the whole wallet, specifying a ...
2
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0answers
28 views

How to get multiple connections to the same node

I'm playing around with connecting my node to another one of my nodes to see how many incoming connections I can handle. Whenever I add node A from node B with bitcoin-cli addnode 1.1.1.1 add after ...
2
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0answers
24 views

Why does a node get stuck in “Loading wallet…”

I've deleted wallet related things from .bitcoin folder including: .bitcoin/wallets and .bitcoin/chainstate and run bitcoin using bitcoind -reindex. This takes longer than just starting over from ...
2
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0answers
82 views

Post SegWit Inclusion, how long until Lightning Network is included in the core?

Introduction - Reason for asking this question With most of the money in the cryptocurrency domain still being utilized in transactions on crypto-exchanges and the numerous hacks that have previously ...
2
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0answers
116 views

What is the alternative of Bitcoin-RPC-Client?

I am implementing Bitcoin-RPC-Client for web application but I found bitcoin-RPC-client is better than bitcoinj and what are the advantages and disadvanatges of Bitcoin-RPC-client.
2
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0answers
329 views

Abandon Transaction or Increase fee

I'm using Bitcoin core v0.15.1 and I am trying to send my BTC to coinbase. I have waited over 72 hours since initiating a transaction and when I right click the "abandon transaction" and "Increase fee"...
2
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0answers
248 views

How to delete last n blocks / roll back to specific block number in Bitcoin Core? (Like `monero-blockchain-import --pop-blocks n`)

I have Bitcoin Core's bitcoind running and synced in a VM. Now I want to clone the VM and run one of the various hard forks (such as Bitcoin Cash) in the clone. The plan is to roll back my copy of the ...
2
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0answers
108 views

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

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 ...
2
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0answers
346 views

What is the smallest ubuntu virtualbox image to run cryptocurrency software on?

I'm looking to do all my crypto related stuff like storing coins and managing my coin wallets inside a virtualbox. I plan to use ubuntu as it seems most friendly with many crypto coins. What is the ...
2
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0answers
110 views

Clarification of some getaddr() function inputs and outputs

In the Bitcoin system to discover new nodes, each node communicates with its peers by sending getaddr() to the peers. Based on the bitcoin implementation: //! the maximum percentage of nodes to ...
2
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0answers
52 views

What is preventing segregated witness from being activated

Segregated witness has been around since 2015 with good publicity and proponents since early 2016. It seems to have the benefits of solving transaction malleability, creating a good foundation for the ...
2
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0answers
1k views

How to choose between so many open-source bitcoin pool software

I am now in the venture of finding and setting up a bitcoin pool company. However, after some research, I found out that there are plenty of bitcoin pool software. There are: CoiniumServ Cryptonote ...
2
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0answers
53 views

Banned bitcoinj node ip

I've created many raw transactions today and after an hour I found out that my bitcoin node is only connected to 3 peers (testnet). Is it possible that my node has been banned due to wrong or double ...
2
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0answers
78 views

Running TorBB on host machine while running Whonix VM setup as guest on the same physical box

I've currently set up Whonix VMs using Virtual Box on OS X 10.11.6. Before that I was using a Bitcoin-qt with Tor Browser Bundle. Now I'm having question what is a best way to use bitcoin+tor setup ...
2
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0answers
691 views

Format of mkey field in encrypted wallet.dat file

I am writing a C++ application to scour large files (typically disk images) for wallet.dat files, with the intention of recovering the private keys. At the moment I am struggling the data contained ...
2
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0answers
326 views

How can I add an old Bitcoin wallet address from Bitcoin Core to MultiBit HD?

I have a wallet with Bitcoin Core. I have used that address on various sites to receive payments from them. I want to add that address to my account on my MultiBit HD program so it will just carry ...
2
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0answers
52 views

A question on CNode class data members

Can any expert help me understand the need for the following members of CNode in src/net.h std::deque<CSerializeData> vSendMsg; std::deque<CInv> vRecvGetData; std::deque<CNetMessage>...
2
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0answers
101 views

Include Bitcoin-Transaction within database-Transaction

I am writing a system that uses the Bitcoin Core JSON-RPC API. Use case: user wants to withdraw some BTC to his BTC address. My application handles this request by the following logic: Check if ...
2
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0answers
100 views

Bitcoin .11 Initial Blockchain Download Problem with OS X 10.10

I am loading the blockchain for a new wallet. Initially I had problems due to ISP issues. This issue is fixed and I now have 8 outbound connections working well with ping times ranging from 50-800 ms. ...
2
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0answers
620 views

Import OLD wallet.dat to new Bitcoin core

i made a wallet.dat backup in an old version of bitcoin qt. The mac where i had wallet is dead. In other mac with the last version of bitcoin core when i try to replace the wallet.dat the app crushes. ...
2
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0answers
3k views

Bitcoin-Qt & setgenerate true

Will Bitcoin-qt mine bitcoins if all I have done is downloaded and installed Bitcoin-qt, and typed in "setgenerate true" into the console? Are there other steps or configurations necessary? If so, ...
2
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0answers
760 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....
2
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0answers
632 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....
2
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0answers
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 ...
2
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0answers
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 ...
2
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0answers
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 ...
2
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0answers
239 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 ...
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0answers
24 views

Bitcoin Wallet generation and TX signing

I am developing a Bitcoin Wallet in Javascript. I've worked on ETH but it's my first time on BTC. Here are following queries if anyone can help: How do we generate bitcoin Wallet like we do in ...
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0answers
31 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
25 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
17 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
24 views

Does Bitcoin Core v0.17.0 run on native wayland?

I'm trying to run bitcoin core v0.17.0 on Wayland on Fedora 29. When I run bitcoin-qt I receive Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland ...
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0answers
25 views

How does the bitcoin network remove duplicate blocks being generated by multiple miners?

Say there are two minersA&B and each of them have produced the next block almost at the same instant. In this situation how is the network going to decide which one is the main block and abandon ...
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0answers
24 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
17 views

Failing to create a new address to be used for receiving staking rewards whenever a generated block is accepted

Our problem is that we need to get a new address on each stake. What I've tried so far is: Generating a new address right before a block is accepted and try using it to receive the stakes, but that ...
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0answers
17 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
67 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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0answers
27 views

Bitcoinj Spend from a address directly without wallet

I am stuck trying to send coins from arbitary privateKey in bitcoinj. How can I make the following function work without using the Kit or Wallet classes? @Override public String transferCoin( ECKey ...
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0answers
27 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
59 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
38 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
16 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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0answers
13 views

how do i change my bitcoin cleint application?

I recently downloaded the bitcoin (--testnet) blockchain data using Bitcore(I thought it was the Orginal client) for some development purpose. but now, I like to move to bitcoin core client. Should I ...
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0answers
62 views

Unable to get balance with bitcore lib

Using latest version of bitcore lib , want to check balance for making tx but once I include var explorers =require('bitcore-explorers'); after var bitcore =require('bitcore-lib'); Error: More ...