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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19 views

I am new to Bitcoin. Am I being scammed?

I am new to Bitcoin. I got into transaction with this woman I saw on Facebook, Olivia Jessica, a lot were mentioning her in a group so I decided to ask her how to do this thing. She asked me to join ...
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1answer
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How to resolve eclair-node-gui-0.3.3-12ac145.jar getting CAPSULE EXCEPTION after java update to version 11.0.9.1?

I've been running Eclair node release eclair-node-gui-0.3.3-12ac145.jar smoothly for some time now on Ubuntu 18.04.5 LTS, but recently had an update to the java version i was using to the latest (?) ...
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Bitcoin Core for ARM-based Macs?

Should we expect in the foreseeable future a Bitcoin Core release optimised for ARM-based Macs?
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34 views

how does merkle root building work for empty array?

It's known that even if no transactions get created, bitcoin still creates a block with empty array of transactions. In this way, I am curious what the merkle root would be. How does bitcoin figure ...
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26 views

What RBF policy will be default on SegWit v1 nodes?

What RBF node policy will be applied by default in order for a SegWit v1 transaction to relay when encountered. Full RBF, or Opt-in RBF?
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42 views

Taproot - Eliminating Key Path

I want to struct a transaction output the key-path of which I want to be eliminated, so enforcing only the script path. In order to eliminate key-path, in my opinion, I should set "Internal ...
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1answer
33 views

bitcoincore connect

I have a problem with bitcoin node is that when I want to get out of the full node bitcoin server. I ran this method and it does not work curl \ --user myusername \ --data-binary '{"jsonrpc&...
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1answer
50 views

How does a node send a chain?

I apologize for the newbie question. I understand that in selfish mining a malicious node can "send its entire hidden chain". Exactly how is this done? I know that usually a single block is ...
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22 views

NBitcoin Transaction sign(secret, bool) is giving error. Instead of bool it says to pass Coin Object

I am using NBitcoin (I'm new to it) to sign a transaction. Here Transaction sign(secret, bool) method is giving error. (I've searched the Internet, but got no help.) Instead of bool it says to pass ...
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35 views

why is bitcoin-qt connecting to port 9051?

Running bitcoin-qt with default policy in the OUTPUT chain to DROP I see lots of packets from localhost to localhost with destination port 9051 being dropped. If I open that port the node syncs. I do ...
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What should I do with my crippled Bitcoin Core? How can it be this unstable still after 10+ years?

Recently, I've had serious issues with my Bitcoin Core. I've installed old versions and reinstalled the new version and done everything to debug it, but it's just crippled. It either gets stuck ...
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73 views

Where can I find the core binaries for v.0.1.5 to v.0.3.21?

I have been looking for core binaries (i.e. win32-setup.exe & win32.zip & macosx.zip) for earlier clients. Any advice on where they are hosted? They have all been removed from SourceForge. ...
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136 views

“Needed Turnover” / “Missing Turnover” - How to get my money out?

Contact Information: contact@securitycrypto.info General information support: info@securitycrypto.info Support and online transaction search with full and detailed information: support@securitycrypto....
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I made a transaction 7 hours ago, the transfer has not yet arrived. I didn’t know that it’s impossible to choose a low commissio [duplicate]

Good afternoon, I made a transaction 7 hours ago,0.0059 BTC, commission 0.0002 the transfer has not yet arrived. I didn’t know that it’s impossible to choose a low commission, because I did it for ...
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In bitcoin-cli getpeerinf call what does “-1” mean as a “synced_headers” or “synced_blocks” value?

Sometimes I see this in getpeerinfo: "synced_headers": -1, "synced_blocks": -1, sometimes it's only synced blocks at -1. What does that mean?
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1answer
26 views

getheaders request being ignored by peers [closed]

It seems my 'getheaders' request is being ignored by peers. I've followed the implementation: https://en.bitcoin.it/wiki/Protocol_documentation#getheaders without success. If I change it to 'getblocks'...
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Question about Electrum wallet file on USB Drive (MacOS)

I have been using a hot wallet (Electrum) for quite some time. Now, I don't want to lose my BTC, so I have decided to transfer the wallet file from the directory where it is located to my USB Drive. I ...
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19 views

Bitcoin Core GUI gettransaction implementation

The cli users have the option to "getrawtransaction txid true" in order to find valuable information about a transaction that could be theirs. This is a very powerful api call that effectively ...
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1answer
30 views

Is the index db downloaded from peers or generated locally?

When the user start the Bitcoin client for the first time, it will download the whole blockchain. But what about the block index (blkindex.dat in older versions) ? Is it downloaded from peers just ...
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Can an unsynchronized node create a valid transaction?

I'm trying to understand how bitcoin transactions work. From what I understand, in the Bitcoin network nodes hold different versions of the Blockchain and after some time the different chains start ...
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1answer
124 views

I think I was scammed [duplicate]

A few days earlier, a guy approached me claiming to mine bitcoins and multiplying my bitcoins 10 times. I invested with $700 and the blockchain wallet after 24 hours showed me $7000 worth bitcoins. ...
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1answer
33 views

How much of bitcoin core software can be custom written at miner's end and how much of the code you can't touch? where does bitcoin draw the line?

I've read bitcoin content everywhere on the internet and nobody has yet demystified the fact that different versions of bitcoin core are working simultaneously. I know how soft forks work and how they ...
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ThreadRPCServer incorrect password attempt from 127.0.0.1:34810

I am reading Mastering Bitcoin book, and on: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch03.asciidoc#full_index_node there is a call to bitcoin node: $ curl --user myusername --data-...
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3answers
104 views

Vulnerability of Bitcoin Network

Hi all I was wondering if I am doin a wrong assumption here: Let's assume a dezentralized peer to peer network and the bitcoin protocol. If a full node changes a transaction within a block and then ...
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1answer
229 views

When did Satoshi Nakamoto release Bitcoin v.0.1 to the public? 08 Jan 09 or 09 Jan 09?

Many websites say Satoshi Nakamoto released Bitcoin on 09 Jan 2009 (Source 1) (Source 2) (Source 3). After looking through the Satoshi Archive, it seems to have been released on 08 Jan 2009 (Source). ...
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1answer
96 views

Why is the bitcoin client still in beta

As of today the official bitcoin core version is 0.19.1 why has it not go to 1.0 version yet ? Is there a timeline from the developer team ? I have seen this similar question from 8 years ago: Why ...
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1answer
66 views

Is there such a service as an unlimited Bitcoin wallet with an API?

Well, I did tons of research and currently I'm using bitcoinlib for python to have a wallet which should be able to hold over one million addresses and occassionally broadcast transactions. It has ...
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1answer
54 views

Transaction not complete for two days now

I sent bitcoins to a wallet using the QR code in order to be very sure of the address. It shows in my wallet that it has been sent. But the receiver haven't seen it in his wallet. I checked it online ...
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37 views

How to sign Raw Transaction with Multiple Inputs

What is the procedure to sign a raw transaction with multiple inputs, i have some doubts, this is what i am doing: Step 1 First I serialize 1 unsigned tx for each input. INPUT 1 02000000 // Version ...
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1answer
38 views

Bitcoin peer info

Why when I run in the node bitcoin-cli getpeerinfo the list is an empty array? Do I need to let time to connect other peers?
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1answer
35 views

How to do tx.addInput without tx_hash if sending from address for the first time?

Iam using the bitcoinjs-lib library and trying to do a transaction. Iam doing the tx.addInput method before building but running into a build issue. I assume an error is thrown if ...
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22 views

the client's 'invalidateblock' debugging command - possible prevention against majority attack?

there is a 'invalidateblock' debugging command in the btc client. How can this command be used in a situation of majority attack threat and play a part of countering the attack? I understand that ...
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1answer
66 views

How do I get Raw Transaction Txid, Scriptpubkey Using Bitcoin Core Console

I just finished downloading bitcoin core on windows 7 and I am trying to create a raw transaction. When I typed listunspent 0 or listunspent 1 on console, I got no message (empty message) in the ...
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28 views

how-to create a Bitcoin address? [duplicate]

I would like to have a tutorial which explains in great detail how to create a Bitcoin address like bitcoin: 3FkenCiXpSLqD8L79intRNXUgjRoH9sjXa ? I was on https://bitcoin.org/fr/choisir-votre-porte-...
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1answer
49 views

How can Server-less communication take place between clients?

I was thinking to design a application which is not dependent on server and can directly send and receive data to and from other clients.I learned it is possible with UDP but how can new users join in ...
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1answer
33 views

If I am on a fork, can the reindex parameter fix this?

I've been reading confusing information online about what the --reindex startup parameter does. This link is not clear to me. https://github.com/bitcoin/bitcoin/blob/...
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38 views

Blocking Port 8333 and other open channels in bitcoin core

in another post someones wrote, Bitcoin nodes use to communicate with each other. You can disable incoming connections on your node if you don't like that (set listen=0 in bitcoin.conf). Now i ...
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1answer
101 views

Bitcoin full node - how to run a pruned node, explaining pruning?

can you explain please how I can run a "pruned" node instead of storing all 300GB of data? Is there a difference how you turn your btc client into "pruning" mode among the different clients, bitcoin ...
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1answer
102 views

Bitcoin Core full node wallet - questions about security & recovery

can you tell me pls, 1) Which secure full node wallet implementations exist? Currently I just know of bitcoin core. Is there not any other one with a GUI? 2) Can you use a Ledger device with those ...
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73 views

How to run bitcoin core in the cloud with virtual server?

can you please explain to me, or link me to other understandable sources, how you can use bitcoin core with a cloud provider? My intent is to not physically have an own server but to use a cloud ...
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1answer
41 views

How to Construct a Ping Message

I am struggling greatly trying to figure out how to send a basic "PING" message, and receive back a "PONG" response. import random import hashlib import socket PEER_IP = "35.187.200.6" PEER_PORT = ...
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23 views

How long does it take to crawl and map the bitcoin network?

There are several websites that have data on the number of nodes in the network. For instance coin.dance. About how long does it take to map the entire bitcoin network?
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1answer
153 views

running bitcoin-cli -testnet getblockchaininfo

Hello when I run this command (bitcoin-cli -testnet getblockchaininfo) I get this: { "chain": "test", "blocks": 0, "headers": 0, "bestblockhash": "...
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26 views

Getting Started with a Hello World Node.js App making an API call to bitcoin.org

I have been reading around trying to find where/how you can attach a SHA256 or MD5 hash (i.e. a small chunk of data) to a Bitcoin transaction, which led to OP_RETURN, but I have yet to see exactly how ...
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1answer
44 views

Bitcoin backend integration - Do I really need the notion of “a wallet”?

I am developing an application that will accept Bitcoins targetting some specific "items" in my application, and later transfert some of those Bitcoins to externals addresses. In many similar ...
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1answer
121 views

How to programmatically send Bitcoins without requiring a local copy of the blockchain?

I'm quite new to Bitcoin development! I've seen the documentation about RPC commands, available when you have a local copy of the blockchain. But I'd like to know if it's possible to create and ...
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1answer
158 views

Running multiple bitcoin instances on same server system

I wish to run multiple instances of bitcoind on my server to support highly read intensive RPC applications. Following links: how to run multiple bitcoind node on one server? Running Multiple Full ...
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86 views

TimeoutError: [WinError 10060] when trying to connect to bitcoin rpc from a pc on the same local area network

I have a laptop with win10 installed. It is now running a full bitcoin node perfectly. I am already able to make rpc requests from the laptop using python and get valid responses. The laptop is ...
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39 views

Bitcoin core causing reboot

I have been having an issue with bitcoin core lately. It has been causing my computer to randomly reboot about every hour or so. I was on version 17.1 but upgraded to 18.0 hoping that would fix the ...
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1answer
183 views

What is the oldest Bitcoin Core Client that can in theory sync to the chain tip?

I've seen this question regarding the original Satoshi Client being able to sync to the chain tip. The main issues why it doesn't work were: Change in protocol messages IRC Node discovery is now ...

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