Questions tagged [client]

This tag should be used for questions regarding Bitcoin clients. A client is any application which allows a user to connect to the Bitcoin (or alternate) network. Alternately, "client" may refer to a non-standard user interface which interacts with the Bitcoin network through a standard client.

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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 ...
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Coin selection algorithm

Playing around with Bitcoin Core Client v0.18.0, I used this command: $ bitcoin-cli sendtoaddress "mozazucvLK179u41bF5Vd2Agp4wsm7HsPo" 0.1 which created this transaction. I noticed that the ...
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Bitcoin 0.18: how to send bitcoin from one address to another using Bitcoind?

To transfer bitcoin from one account to another address, we have used sendfrom method and which got deprecated in the latest version Bitcoin 0.18.0 Bitcoin sendfrom method On reading the document of ...
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Strange re-connection problem with python-bitcoinrpc

I am using https://github.com/jgarzik/python-bitcoinrpc to access the bitcoin core rpc. I have found a very strange re-connection problem. from bitcoinrpc.authproxy import AuthServiceProxy, ...
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How do I broadcast an “alert” message to the network

I am curious about how to broadcast an alert. I know that this is possible because the system to send alerts has been shut down and this probably won't work, but I am curious about how I can ...
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Make a metadata transaction without transferring bitcoins

Is it possible to make a metadata-only transaction without transferring bitcoins? (I know you should always pay a fee, but is it essential to transfer bitcoins in a transaction?) Thanks and regards!
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41 views

How does one mine a fraction of a bitcoin?

I'm new to the whole bitcoin stuff. The stuff I've read about mining so far told me that when a node in blockchain finally finds the correct nonce for a block that can be accepted in blockchain, it ...
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136 views

What does it mean if TXID and WTXID are the same?

I'm having a tough time understanding what exactly WTXID is and what it means when WTXID and TXID are the same (and vica versa). What I understand is that WTXID includes the witness data. Since non-...
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764 views

Is there a reason to why Bitcoin Core does not implement BIP39?

Is there a specific reason to why BIP39 isn't added to Bitcoin Core? Seems very trivial to add and am confused to why it isn't there.
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Litecoin : Error ECONNRESET while trying to connect with NodeJS

I am getting started with Litecoin so please bear with my question. So I have a local litecoin node running in my local system. So I am planning to use NodeJS to communicate with the Litecoin server. ...
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Can we get any default address before running getnewaddress?

I am trying to develop some application using bitcoin (currently only in the regtest mode). I am aware that one can create a new address using bitcoin-cli -regtest getnewaddress RPC call, but I ...
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How can I check how many users have upgraded their Bitcoin Core software?

Bitcoin Core has just released their 0.18.0 upgrade. Is it possible to check how many users have upgraded to this version and also how many users are running older versions?
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Bitcoin Core client on multiple computers

I have one computer with a full node bitcoin core. I would like to have bitcoin-qt installed on a different computer but I don't want to download the full blockchain again in the other computer. I ...
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Outputs only from bitcoin address

I just want to ask is there any way on how to extract ONLY outputs from particular bitcoin address. I need to export (make a list) on all address that were associated with the outputs from the sender ...
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Is their a way to use Bitcoin's Testnet/LN Testnet within CLI without downloading Bitcoind?

I'd like to start working with Bitcoin's & Lightning's Testnet but don't want to download bitcoind on my current computer.
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How to most efficiently keep in sync blockchain on offline computer (including through bitcoin-qt upgrades)?

I have bitcoin-qt running on online computer. I want to: copy blockchain to offline computer (preferably using WORM media for security reasons) from time to time update offline copy with newest ...
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38 views

Implementation of getdata

I am confused about how getdata() is actually implemented at full nodes. Suppose a full node receives a getdata() request with MSG_BLOCK flag and a hash H of some block B. Then would it simply look ...
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1answer
366 views

Bitcoind daemon: error connecting to the server?

I am trying to create a new bitcoin address and store it in a shell variable $NEW_ADDRESS. When I run this command: $NEW_ADDRESS=$(./bitcoin-cli getnewaddress) I get the following errors: error: ...
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Trying to understand why hash value is more secure from hash algorithm

I am currently studying in college in the US and was actually curious about bitcoin and cryptocurrencies as a whole. I started looking on free university sites like Stanford university and New York ...
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1answer
135 views

Bitcoin curl no reply

Hi I have made a curl to my server but get no reply . What am a missing rpcuser=rpcusername rpcpassword=rpcpassword rpcauth=rpcusername:generatedkey daemon=1 server=1 rpcport=8332 rpcbind=0.0....
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103 views

Get Coinbase.com miner fee before sending to another address

I am using coinbase.com php library to send bitcoin to another address. But every-time i am sending bitcoin the fee is shown to me after sending the bitcoin. This is causing me some problem. Is there ...
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How to Send BTC from vmnode address to local address using privatekey in testnet?

I created two bitcoin address in VM nod as well as local and dump privatekey for both addresses by using "dumpprivkey" command. Is there any posibitity to send BTC from bitcoin address which is ...
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How do I move the blockchain file location on Windows?

I tried to edit the storage information for the blockchain. Neither the Windows 7 nor Bitcoin qt could do it (it says that the app can't open the configuration file). So I tried to edit the -datadir ...
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I am confused about the difference between a fork and a client, can someone explain?

My understanding is that clients are different software environments which run on top of the decentralized computing infrastructure which is the blockchain architecture. The most popular of which by a ...
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Would bitcoin core work on a big endian system? Or even a system where C++'s `int` is not 32-bit?

Looking at the source code of bitcoin core, the serialization part, I see that there's no serialization abstraction layer that accounts for a possible different endianness or different binary layouts ...
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Bitcoin Wallet generation and TX signing [closed]

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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51 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 ...
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1answer
48 views

Is there a Wiki comparing different wallets?

I am new here so please go easy on me if my question is not written to your standards. If you ask me to make changes, I will make them so that my question is more suitable for this SE. If you look ...
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1answer
54 views

How do different implementations of the Bitcoin Cash client know which type of coin they're processing?

TL;DR: Where in this code does the SV client figure out that it's not processing an ABC blockchain? This image prompted my question. There are a couple different mutually incompatible (I am assuming ...
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2answers
58 views

mining: losers get nothing?

if the winning miner takes the 12BTC+fees, unless you own the biggest mining operation out there, or are not a member of the biggest pool, why bother mining, if there is no prize for second place? ...
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Is it required to broadcast the addresses generated locally to the bitcoin network?

Like the transactions are broadcasted to the bitcoin network , is it required that locally generated addresses also need to be boradcasted to the bitcoin network ?
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1answer
66 views

How long does it take to validate a full block?

I'm interested to know how long does it take to validate a Bitcoin block on average home pc. I'm less interested in a precise number. I'm fully aware that it can be different between different ...
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1answer
49 views

The BIP32 Extended Keys are different?

I was using the same random entrophy (d2310508c6c5313795dc80a7408b608ffda7176dbedefac00f8114c5dd89a673) to generate the BIP32 Root ExtendedKey (path: m) in the libbitcoin-explorer and web-based wallet ...
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1answer
82 views

BitcoinCore Ubuntu buiild error: ‘relative’ is not a member of ‘fs’

I'm trying to build Bitcoin core client on an LinuxMint. I'm having the following error(which have not encountered before, while making it on MSWindows or another Linux machine) in make process, right ...
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41 views

Mining in the wallet [duplicate]

Someone said me that I should give him my wallet email and then he will request for the mine from the mining network, after that he asked that you will receive email from that u will get code which u ...
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1answer
29 views

Why is there an addrlocal field in the output of the RPC call getPeerInfo, and how SPVs handle it?

According to the Bitcoin core developer reference, the RPC call getPeerInfo has in its output a field called "addrlocal" which holds our IP from the worldview of the peer. Why is this output there? ...
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2answers
130 views

Bitcoin built with a newer Berkeley Database incompatible with a older wallet?

Is a Bitcoin client built with a newer Berkeley Database incompatible with a wallet file from a older client? Or is it that a wallet made from a newer Berkeley Database not compatible with an older ...
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What are the common cases of disputes where buyer is found guilty in cryptocurrency trade?

I am working on dispute management of crytocurrency trade and I am new in this field. I want to know what are the cases where a buyer is found guilty in a cryptocurrency trade whether it is on ...
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28 views

Separating user accounts in a wallet for a large scale web app

I'm planning to implement a web platform that maintains user wallet accounts and generally acts as a web wallet. They can deposit, withdraw and transfer coins.The number of accounts should be in ...
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1answer
204 views

What applications of clients use bitcoin JSON-RPC?

As far as I understood, the Bitcoin JSON-RPC is one of the ways (if not the only way) in which applications can be built that can access the bitcoin wallet. So, the RPC server here gives that access ...
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1answer
147 views

How to add a signature to a transaction which I can broadcast

I am using ledger and multi sig to sign a transaction I got signature hash where both party signed the transaction. How can I attached this signature to the transaction so that I can broadcast it to ...
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2answers
90 views

How to differentiate between mining node and non mining node in bitcoin

I am trying to understand how does mining traffic looks from non mining ones? If I try to discover mining node I believe I can look for nodes which broadcast blocks. Is there someway to know which ...
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2answers
120 views

How to monitor balance for addresses other than by using importAddress?

Is there any way, other than importaddress, to watch balances of specific addresses? If not, how it is possible for wallets and explorers to give information (balance, transactions) about specific ...
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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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2answers
64 views

address format is different from bitcoin core response from btcd

For now, I'm generating WIF and address using golang btcutil package programmatically. wif, err := btcutil.NewWIF(privateKey, conf, false) if err != nil { return nil, err } ...
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1answer
237 views

Confirm transaction in regtest mode

I'm testing some wallet features on regtest. Here's the sequence so far: cash-cli -regtest generate 101 cash-cli -regtest getbalance 500.00000000 cash-cli -regtest getnewaddress newAddress1 ...
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1answer
71 views

Cryptocurrency: check if transaction is viable masternode output

I'm developing a tool for masternode automization similar to https://gincoin.io . I'm trying to figure out how to decode if transaction is viable for a masternode. From what I know the ...
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2answers
66 views

What is the main difference between “light/thin client” and “client” in sense of “functionality” and “capability”?

What is the main difference between "light/thin client" and "client" in sense of "functionality and capability" ? I mean, what can a client does that a light/thin client cannot ? (ex. sending ...
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34 views

What kind of micro processor / micro controller can run Blockchain light client?

Is there any kind of micro-processor / micro-controller that can run Blockchain light client? An example can be Samsung ARTIK: https://www.artik.io However, it's too big. Is there any other similar ...
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1answer
22 views

bitcoin transfer without creating wallet

My question is about transferring bitcoin between two addresses without having a wallet. Here is my idea of transferring bitcoins in following way: Idea: I have my own Android Application. I am ...