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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 Core software.

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7 views

Does a Node connect to all the peers?

Does a Node connect to all the peers in the network? Or just a few? If its just a few, how many? If its just a few, what about if all of those nodes in the list are malicious?
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0answers
21 views

How do we create a web wallet for Bitcoin? [on hold]

Is possible to create an online bitcoin web wallet with a single full node on cloud..??? The working of web wallet like coinbase is use single full node cloud setup for creating multiple wallet ...
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0answers
16 views

“Processing blocks on disk” taking forever

I started download the bitcoin blockchain on a 250GB hardrive with prune=0, txindex=1 on bitcoin.conf file. I downloaded like 95% at a rate of around 10% per 8 hours. I didn't have enough free space ...
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2answers
36 views

How the different criptocurrency blockchains communicates?

I've learned that the different criptocurrencies have their own P2P software which uses their own blockchain network to work. So how does exactly occurs the process of exchanging one coin to another ...
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3answers
334 views

How do I spend bitcoins from multiple wallets in a single transaction?

Using, e.g., the Bitcoin Core command line, how could I spend bitcoins from multiple wallets in a single transaction? This comment says: instead of sending the transaction to the network, you send ...
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1answer
19 views

Setup a full node on server for frond end Wallet

I am a new in bitcoin technologies. I want to setup a full node on cloud server. Also I need to use RPC of this server for front end app.That is creating bitcoin wallet and its further operations(such ...
1
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1answer
61 views

Is it possible to run two Lightning Network nodes on top of single Bitcoin Core node?

I would like to simultaneously run LND and Eclair nodes on top of single Bitcoin Core bitcoind node. Is it possible? I wasn't been able to pull it off so far. If possible, how to set up ZMQ and ...
0
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1answer
30 views

What is the difference between P2SH redeem script on Bitcoin and on Litecoin?

I am building a service that is based on multisig wallets. My current progress is so that I've implemented the multisigs for Bitcoin network and it works fine. Now I am on Litecoin and I am facing ...
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1answer
13 views

Bitcoin core and transaction fees

I'm using combination of 'createrawtransaction' and 'fundrawtransaction' API calls to create my transactions. I don't pass 'feeRate' option to 'fundrawtransaction' and rely on bitcoin wallet to figure ...
0
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1answer
21 views

After a long connection to the wallet, it offers to reinstall blocks and synchronize all Bitcoin core blocks

1)I installed bitcoin core on an ssd drive. Some time did not include it, a month after the inclusion of bitcoin core when you start the application with ssd asks to re-download all the blocks, the ...
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0answers
21 views
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2answers
326 views

Lost Bitcoin-qt password

I have a friend (yes it's actually a friend and not me) who lost his password for their Bitcoin-qt wallet and can't access is Bitcoin. The wallet is installed on the hard drive of a MacBook and he ...
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2answers
8k views

Warning: Unknown block versions being mined! It's possible unknown rules are in effect

Recently, my full node (Bitcoin Core 0.14.2) displays this for both HD and non-HD wallets: Warning: Unknown block versions being mined! It's possible unknown rules are in effect What does this ...
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1answer
35 views

Transaction created, but txid not found on blockchain explorers

Transaction created as same others, but status - 0/unconfirmed And txid nod found in block explorers Transaction ID: e9c858f852a1de7c70e6f8377f2147f3def1d4b1d85a5947d028bb9c13450318 How to succefuly ...
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2answers
73 views

What is the source of initial transactions of bitcoin?

Sorry, if I am wrong or silly! It is understood that: a) Satoshi Nakamoto sent the first transaction to developer Hal Finney on January 12, 2009, the genesis block contains 1,073 transactions and he ...
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1answer
32 views

Bitcoin Core 'unable to open file' causes reindexing to fail

I recently struggled to send bitcoin from my Armory wallet (0.96.5) to another account. Sending bitcoin did not work because the wallet could not synchronize with the blockchain. Since Armory relies ...
0
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1answer
33 views

what is the latest required hash rate to mine a block? [duplicate]

What is the latest required hash rate to mine a block of bitcoin ? How much power do you need to mine a block in a day ? Thank you
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2answers
76 views

BIP44: What's the use of internal addresses?

I've read other questions (and their answers) on this but I still don't see the use for internal addresses. I get that you're supposed to send the change of a transaction there but I don't see how ...
2
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1answer
26 views

Whats the difference in way you installing full nodes

I'm newbie in blockchain world, so I'm curious what is the difference between installing full node by using libs such as bitcore-lib (using node.js) and installing it through the daemon (mentioned ...
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1answer
1k views

How to create a receiving address using the Bitcoin Core client?

Im new on bitcoin 1-2 years ago I used bitpay and coinbase but now Im trying to get the wallet directly on my macbook.Downloaded the bitcoin core from bitcoin.com So, Im registered on https://gourl....
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1answer
17 views

Is it possible to generate(mine) a block with specific transaction via bitcoin-cli on regtest?

I want to generate a block with specific transaction via bitcoin-cli on regtest. The "generate" command does not have the option. It collects transactions in mempool by the default rule. I guess I ...
0
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1answer
21 views

What is entropy mean in this context?

"The Bitcoin nonce forms part of the block header, which is used by miners to provide entropy as part of the Proof of Work process, to try and find a hash meeting the difficulty requirement." Quote ...
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3answers
155 views

Where can i download latest stable bitcoin-core src files?

i want to download latest stable bitcoin-core src files. and want to build it on my system from source. here is latest src of bitcoin-core but its not stable for production ready environment. https:/...
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1answer
33 views

How to discover startup flags or command-line options for bitcoind?

I'd like to query the Bitcoin daemon (bitcoind) to find out what startup flags (command-line options) were sent to it on startup (or the current state if it has changed, e.g. -server=0/1 changing). ...
0
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1answer
24 views

mining difficulty is not changed on regtest

I want to see the automated mining difficulty change on regtest but it did not change even I generated 2016 blocks. How can I see it? // initial difficulty $ ./bitcoinA/src/bitcoin-cli -rpcuser=...
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0answers
13 views

Is “Ring Signature” used in “Confidential Transactions” of the Bitcoin?

According to the Ring Confidential Transactions research paper of Monero (Link to the paper), in section 1.5. Ring Confidential Transactions Overview, it is mentioned: "We describe a modification ...
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0answers
10 views

How to sign an omnilayer transaction without setting up omnicore node in NodeJs?

It seems that i'm able to do all a wallet endpoints could make with omniexplorer's API here: https://api.omniexplorer.info/#request-v1-properties-gethistory-property-id except not knowing how to sign ...
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0answers
17 views

how does PACKAGE_NAME defined and used in bitcoin source code?

In bitcoin source, I found a variable named PACKAGE_NAME, how does it works?
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2answers
35 views

Why is there a finite amount of bitcoin addresses and how is the range of possible addresses determined

My first question is what the precise logical/theoretical reason is that there are only a fixed amount of possible bitcoin addresses. Secondly, I can generate a bitcoin address by using address(sha256(...
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2answers
927 views

Where is blockchain located on mac for Bitcoin-Qt?

My machine could not handle the Bitcoin-Qt blockchain and i need to delete it but i cannot find where it is located. I have tried to cd to ~/.bitcoin and ~/Library/Application Support/Bitcoin/ but no ...
0
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1answer
22 views

I can pay invoices on my mainnet LND node, but others cannot pay my invoices

I have an LND node running the 0.5.2-beta release on a 2 core, 8GB ram Ubuntu 16.04 VM. This is my node: https://1ml.com/node/02d5efae50c1cdc6011e40b74f061ea4f444088865ec14a59e4ee6cf0d71c842fc I used ...
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0answers
11 views

What is the most suitable time interval to analyze data

I'm statistically analyzing the bitcoin prices. We have the ability to analyze them based on hourly, daily, monthly etc. So based on the requirement it is possible to select the period. Consider if we ...
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1answer
20 views

Which price need to be taken for bitcoin analysis

I'm doing a bitcoin statistical analysis using Python. The bitcoin prices consist of close,open, low, high prices per an hour. For statistical analysis, which price do I need to take to consider. Is ...
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1answer
641 views

Bitcoin Mining as a Newbie (link wallet to another person's miner)

I'm new in bitcoin mining. I would wish to mining to make some profit. I have just talked to someone and he has told me I can partner with him to use his miner. I have some bitcoins ready with me and ...
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0answers
18 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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2answers
48 views

How to change RPC port for bitcoind? (rpcport=xxx in bitcoin.conf doesn't work)

I'm running a testnet bitcoind node and I have been doing RPC calls on the default port 18332. I have added this line to ~/.bitcoin/bitcoin.conf: rpcport=19832 And restarted the bitcoind service. I ...
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2answers
41 views

What Opcodes are used to store a file within Bitcoin? [on hold]

At a block-to-block level, what is actually encoded at a byte[] level to encode a file stream?
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2answers
31 views

Information to recipient of the transaction

I have some questions of the transactions bitcoin, In a transaction bitcoin, there is not information on the recipient, right? How do services such as blockchain.com track information about a ...
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1answer
21 views

Keeping wallet addresses outside bitcoin core

I'm trying to build a good security for my online bitcoin based application. Is something like this possible? send_bitcoin(address) create_address() sweep_balances() + | | ...
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0answers
24 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 ...
0
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1answer
21 views

JSON-RPC get full nodes information

Is there any way to get all full nodes by RPC call? Afaik full node contains information of other full nodes in the network and was wondering how to request that. I red the documentation on Bitcoin ...
0
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0answers
21 views

bitcoin core: How can I debug any rpc call through LLDB or GDB?

I want to debug "decoderawtransaction" rpc call for learning. I tried it with the following page as a reference but I could not find the way. Can you help me? https://gist.github.com/gubatron/...
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0answers
16 views

undefined is not an object error when adding BIP39 to React Native

I have a React Native Project and it was worked correctly till I added bip39 package to the project. when i try to require bip39 in my component i get the below error. undefined is not an object (...
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2answers
534 views

How to get notification on bitcoin receive with bitcoin core

How can I get Bitcoin receive notifications with Bitcoin Core. I have tried the walletnotify and blocknotify options. walletnotify is fired two times when I send or receive bitcoins. And with ...
11
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3answers
6k views

Bitcoin client won't connect to the network

I installed Bitcoin QT yesterday and it was very slow to connect to the network. It didn't actually get there for over an hour. Today I opened it again and it won't connect to the network at all. Any ...
0
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1answer
31 views

I was tasked with installing a bitcoin kernel on ubuntu and I had questions

I was given the task to install Bitcoin bark, to receive payments in the service. I have found some tutorials, but they were not used because they are GUIs. I want to use a bitcoin from the command ...
2
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2answers
159 views

Issue on configuring the bitcoin core build on Ubuntu-18.0.4

I am trying to configure the bitcoin core build , as I use make , I received the following issue . ~/Desktop/bitcoin$ make Making all in src make[1]: Entering directory '/home/fu/Desktop/bitcoin/src'...
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1answer
7 views

Network connectivity to the Fullnodes

What would the router configuration (port forwarding) be if I have two nodes 192.168.2.21 and 192.168.2.22 running bitcoin and wants to enable port forwarding for them both on 8333?
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1answer
16 views

Does Merkle Tree root hash changed when miner node not found POW nonce?

In bitcoin PoW process,if miner does not found the nonce, I understand that he must to increase nonce and rehash the entire block header again to mine the new block. so if nonce defined 4byte[between ...
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1answer
34 views

signrawtransaction is not a function on bitcoin core V0.17.1

I'm using npm bitcoin-core ^2.0.0 to get access to my bitcoind (v0.17.1 MAC) My code: let signedRawTx = await btcClient.signRawTransaction(rawTx, [], [privateKey], 'ALL'); I get an error message ...