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Questions tagged [bitcoin-core]

A full node implementation of the Bitcoin protocol with a GUI and a wallet. Bitcoin Core is a MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client".

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Getting a "couldn't connect to server" error on getblockchaininfo

When I give the following command I get an error after a LONG lag (maybe 15-20 minutes): ~: bitcoin-cli getblockchaininfo error: couldn't connect to server Why?
Harry Pillsbury's user avatar
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Looking for revenue data of bitcoin related websites

I was wondering if we can share pointers or anectodes about revenues of web projects related to bitcoin or general cryptocurrencies.
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Blockchain to store private data and ownership

As far as I know Bitcoin Blockchain can be accessed via API to enter data. In this case I want to generate a hash/ Checksum MD5, that cannot be understood by anyone that doesn't have the private key, ...
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Bitcoin core internal transfer problem

i have one big problem in bitcoin core internal transfer. to understand my question, please read my problem clearly. 1) Let me explain you by providing example. My one of the core account let's say "...
dreamitbig's user avatar
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How can I get the txids of memblock that will be confirmed in the next blcok using bitcoin-cli?

I want to get the txids of the (mem-pool 0 I mean the mempool block that will next to be confirmed) using bitcoin-cli. Basicly I want to get the txids in https://mempool.space/tr/mempool-block/0 this ...
Gencehan ARPAÇAY's user avatar
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GRT address vs BTC address

I was asked to provide my BTC addresss and accidentally provided my GRT address to receive funds, the funds were initiated to send, will this be a problem?
Daniel Gingerich's user avatar
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Running out of disk space with Bitcoin Core

A year ago I purchased some bitcoins and it was sent to my address. I loaded up Bitcoin Core and installed it to my laptop HD, it ran out of space on the HD, mid blockchain sync. It has now been a ...
Simon Clark's user avatar
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Newb Help - Output not matching input

I've just attempted to send some bitcoin between 2 wallets and the amount received in the receiving wallet doesn't match the input, can someone explain why? Here is the transaction https://blockchain....
slightfracture's user avatar
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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 ...
bzlight's user avatar
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How does one verify signature in a P2WPKH transaction?

(Assume there's no OP_CODESEPERATOR) For standard P2PKH, the signature digest is generated this way: NewTransaction settle the TxOuts well set all TxIn scripts to empty insert the Previous Locking ...
Archit Dabral's user avatar
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Can I add Lightning-Core to bitcoin-qt full node?

I am interested in running lightning core, but the instructions say Bitcoind is required. I am running a full bitcoin-qt node on Linux Mint Ubuntu. Will lightning core work with qt or, if not, is ...
user148239's user avatar
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bitcoin is not showing the correct balance after reusing an address

(i only reused because the first one was a test) Bitcoin core gui is showing a balance lower than the amount on sparrow. Sparrow is connected through my node and showing the correct amounts so I know ...
Tom's user avatar
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How to Sign Bitcoin Transaction from two or more children wallet in HD wallet

How can I handle a situation where I have bitcoin on two or more different wallets with a single phrase, how can I sign the two transactions to a friend. Example: I have 2BTC in a wallet address that ...
Topman's user avatar
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What data structure is used to store the bitcoin transactions in the blockchain?

In what data structure are bitcoin transactions stored in the blockchain? That vout and vin thing shown on blockexplorers is in json format. So, in the code, what data structure is used since in the ...
Athul A's user avatar
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Why is it necessary to solve the SHA-256 issue to get a bitcoin?

I understand that for a new bitcoin to be born it is necessary to solve a SHA-256 problem, that is, to make a machine effort for this (a real race). Whoever makes this effort first takes the bitcoin, ...
wesleysc352's user avatar
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old paper wallet shows missing balance after import; hacked? Bug? Confused?

I have an old (2014) paper wallet I've deposited coins into over the years. I have another paper wallet that was generated around the same time, but wasn't used until last year. I just finished ...
Rich Remer's user avatar
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"bitcoinrpc.authproxy.JSONRPCException: -342: non-JSON HTTP response with '401 Unauthorized' from server"

I used the following code to connect to the bitcoin core client and encountered this error: bitcoinrpc.authproxy.JSONRPCException: -342: non-JSON HTTP response with '401 Unauthorized' from server My ...
wyf's user avatar
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Quantifying the long term costs associated with self hosting the Bitcoin node?

In this question I discussed the option of self hosting the Bitcoin node vs. using 3rd party services with API access. I quoted a colleague who said that "for every coin we wish to support, we ...
Design X's user avatar
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What exactly is the new (?) "to" field in the Bitcoin Core RPC API?

https://bitcoincore.org/en/doc/0.20.0/rpc/wallet/listsinceblock/ "to" : "str" (string) If a comment to is associated with the transaction. I've read that ...
Alexxander's user avatar
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1 answer
81 views

Bitcoincore wallet 0.20.0

Because on windows it is so difficult to load the blockchain into the BitcoinCore wallet. Arrives in 2016 the loading rate increases days. In ubuntu18.04 it is so fast and does not slow down after ...
Miner Br99's user avatar
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If i download the 160GB downloading , i will be global node?

i have a question , i've searched a lot but no answers i get i've installed bitcoin core and after opening the app , it is downloading about 160GB and its gonna take two weeks to be completed my ...
user102032's user avatar
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1 answer
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Need help with understanding this script file

Here is an image of txt file. I had asked someone to help get some bitcoin out and they sent me this code with a price tag of 12$ But I have no idea what its used for as they have not responded. Any ...
Lisa 's user avatar
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1 answer
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How can I generate public address from an xpub key in Java?

I have an xpub key with which I want to generate all addresses which have been used or will be used and then find out the keys which have balance. Here's a sample xpubkey with balance- ...
Parth Gargava's user avatar
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transaction issue

In the absence of someone at home, I noticed two incomprehensible transactions. Why does a large transaction with a n/a address? Or is this some kind of trick of the BItcoin Core client?
Evgeny Kolodenets's user avatar
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1 answer
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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 ...
Max's user avatar
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How to send Bitcoin in the Testnet?

I'm using this library: https://github.com/lian/bitcoin-ruby And here's my code: require 'open-uri' require 'net/http' require 'net/https' require 'json' require 'bitcoin' Bitcoin.network = :...
0xgoku's user avatar
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How to give IP to my node on the Bitcoin Lightning Network

I want to give Ip address to my new node . I have got the pubkey for my node , on the lightning.exe application ,but could not set IP address to my node so that it can be seen publicly on the site "...
Mansi Gyastelwala's user avatar
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1 answer
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Sending BTC from two addresses that are generated in other nodes

Is there a way to utilize bitcoin core that is installed in my server being as a mediator sending BTC from two addresses, which are generated in other cores? For example, James has BTC address A ...
JayB Kim's user avatar
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Bitcoin wallets

0 down vote Hello I hope someone can help me please, basically I have made an offline paper wallet. Let's bare in mind I have no printer or camera phone. Anyway I made the paper wallet offline.I ...
mohammed's user avatar
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2 answers
736 views

Electrum is not listing "unconfirmed transcation" in History tab after 4 days. Can I send new transactions?

I am using Electrum(2.6.4) and has an unconfirmed transaction from last 4 days. I tried viaBtc accelerator as well in these days. Yesterday, I stopped my Electrum wallet in my PC and restarted after ...
Rob's user avatar
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How to pass Livenet Txhash on a testnet Bitcore node

I want to pass Txhash of a livenet Bitcoin transaction to a service created in Testnet bitcoin node. I have been using Bitcore as my client for writing services in nodejs. This is my Bitcoin Client
user44698's user avatar
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1 answer
292 views

Is it possible to perform split payment in bitpay

Hi all coming to the question am using bitpay payment in my project..Is there any possible to perform split payment using bitpay For example am performing bitpay payment for 100 usd for one wallet ...
vimal's user avatar
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How to check Bitcoin payments received or not

I am creating a software and i want to take anonymous payments through bitcoins and once the payment is received to my bitcoin address then the user get serial key of that software... so How i can ...
Master India's user avatar
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1 answer
1k views

How do I set up bfgminer?

How may I know if I've set up my bfgminer correctly? I don't have any hardwares (cause I'm like pretty broke and it costs a lot) so how may I know if bfgminer is properly working? How do I know if I ...
acealbert's user avatar
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1 answer
177 views

bitcoin upgrade needed: the current client is not synchronized

I have bitcoin client 0.6.0.6 (no longer supported!): I did not upgrade on May15. My current client will not synchronize past 85%. no luck with, DB_CONFIG set_lk_max_locks 537000 I am in the ...
syntax's user avatar
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2 answers
232 views

Can I restore an additional address of Bitcoin Core

Once in Bitcoin Core I created an address to receive some payments from a faucet. After years I reopened the Bitcoin Core and started to synchronize it. After a while there was a crash, and I decided ...
Андрей Глебов's user avatar
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1 answer
141 views

How to identify bad peers that are connected to my node

How do I know if it's a bad peer? I see a lot of connections, but does the software filter out bad peers? Or is it up to me to do it? Thank you!
Edward Halverson's user avatar
-2 votes
1 answer
45 views

Build bitcoin-qt.exe on ubuntu 18.4

0.8.1 version and when i compile this version but successfully compiled but now i want to generate the window executable file(.exe) from bitcoin-0.8.1 version. so latest version and older bitcoin-0.8....
NotRin's user avatar
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What happened to this Bitcoin transaction? Block fee lost?

I'm writing a bitcoin blockchain indexer. I've indexed every block hash and now I'm working on indexing each transaction in each block. I've been finding some weird stuff here and there and I don't ...
user2880722's user avatar
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2 answers
303 views

The three public keys A B C are private keys (x-1), x, (x + 1). Here, I want to know if (x-1) is A or C

Private key x = pubkey B (x (+ or -) 1) = pubkey A, C I only know the public keys A and C I am looking for a way to know if the public key sequence is A B C or C B A B = ...
gpcam's user avatar
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-4 votes
1 answer
68 views

decentralized cryto currency without block time

Block time or delay is often a problem in Bitcoin. Then would it be possible to develop a decentralized cryto currency with zero delay/block time? Any reference will be appreciated.
180118's user avatar
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Is it possible to get a monthly "fiat/altcoin allowance" from simply "locking" your Bitcoins in a pure smart contract?

Let's suppose that Mr. John Doe has somehow managed to accumulate 10 BTC. He holds on to them for dear life as it's his one and only savings/lifeline. He has essentially zero fiat money. Only a bank ...
John Doe's user avatar

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