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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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25 views

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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25 views

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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19 views

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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0answers
29 views

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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0answers
13 views

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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26 views

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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1answer
35 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
179 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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2answers
31 views

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
80 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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0answers
45 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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19 views

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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1answer
18 views

How do I move the blockchain file location on windowns?

I tried to edit the storage information on bitcoin.info but neither the windowns 7 nor the Bitcoin qt could do it (it says that the app can't open the configuration file). So I tried to edit in the ...
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2answers
27 views

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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2answers
35 views

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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0answers
34 views

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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0answers
46 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
46 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
52 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
53 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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1answer
9 views

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
57 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 ...
1
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1answer
41 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
77 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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2answers
33 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
25 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
103 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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0answers
26 views

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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0answers
24 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
146 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
102 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
85 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
96 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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0answers
14 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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2answers
50 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
172 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
67 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
61 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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0answers
30 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
21 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 ...
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3answers
57 views

If I invest £2,000 in bitcoin and the price goes down, can I lose more than my investment. Could i Have to sell my house to pay back the losses?

If I invest in Bitcoin is it possible to lose more than my initial investment ? In other words if the price goes down substantially, to well below that of when I initially invested; is it possible ...
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2answers
267 views

Specific explanation of “timeout” configuration option in Bitcoin

According to Running Bitcoin - Bitcoin Wiki, timeout is described as following: Specify connection timeout in milliseconds To my understanding it would mean that if a response was expected, if not ...
2
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0answers
61 views

Why is the Serialization limit set to 0x02000000?

In addition to the block size limit, there is a limit on the maximum message size. Is there a rationale behind the 32MB limit set in src/serialize.h or was it picked because it's just a nice round ...
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2answers
43 views

Could mining centralization be countered by checking if the node connects to many ASICs instead of one?

In a mining pool, many ASICs and GPU/CPU from all around the world connect to the pool's node. Is it possible to force every node's client software to check if a node is connected to just one ...
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1answer
30 views

Is there a Bitcoin wallet that has French language support?

Which Bitcoin app has a language option that can be changed from English to French? I have tried few applications but they seem to be no language option.
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1answer
53 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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0answers
16 views

Open Source SPV client with sendTransaction functionality

Are there any open source SPV clients (ideally in C#) that have sendTransaction functionality? I am creating a C# mobile application to send bitcoins and receive bitcoins, but the application ...
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2answers
57 views

Do lightweight wallets validate signatures? If not, why?

I've learned that "some SPV clients simply don’t check signatures themselves at all": https://bitcoincore.org/en/2016/01/26/segwit-benefits/#efficiency-gains-when-not-verifying-signatures I wonder if ...
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1answer
98 views

Bitcore-wallet-client “Server response could not be verified”

I'm getting an error trying to sign a transaction with bitcore-wallet-client. I create the transaction, publish it and when I try to sign it, I'm getting the error: "SERVER_COMPROMISED - Server ...
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2answers
151 views

Is the any workable testnet3 Bitcoin solution for creating, signing, broadcast a normal transaction using Golang?

Currently I'm trying to create, sign & broadcast bitcoin transaction using btcsuite. For start, I've already had testnet3 address & its associated privatekey for testing. However, hunting ...