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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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1 answer
29 views

Does Utreexo work with a pruned node?

Does the Utreexo UTXO accumulator work with with a pruned node, or must the entire blockchain be present on my local drive before running Utreexo?
0 votes
1 answer
43 views

Bitcoin node GUI shutting down right away

My node was running fine until I decided to change the setting under the network tab, I checked the box for "Use separate SOCKS5 proxy to reach peers via Tor onion services" and on Proxy IP ...
0 votes
1 answer
413 views

Bitcoin Core Peer Connecting Problems

I am trying to get Bitcoin Coin to sync . I am having problem . I have tcp port and Udp port setup . Tcp port is inbound 8333 outbound 8333. But still no peer connection. I don't know what to do at ...
0 votes
1 answer
155 views

Main wallet unspent transaction

I have a question about an unspent transaction, we know that after some transactions we have a change address created by the main address, now imagine that Bob mined 6 BTC, now he transferred 2 of the ...
3 votes
1 answer
50 views

bitcoin-cli listtransactions fee amount is way off, why?

I am using the default signet network, my txid is 3923927eb3b6213bab5d0bee8364a87eafe357cb4d42ce6c587f0372735c7ff0. bitcoin-cli listtransactions shows a fee of 0.00596777 when in reality the fee is 0....
2 votes
2 answers
570 views

Only 10 connections on my raspberry pi full node

I'd like to know why I only get 10 connections on my full node? Is there something missing in the conf file? $bitcoin-cli -netinfo Bitcoin Core v0.21.0.0-7d8a10a6f - 70016/Satoshi:0.21.0/ ipv4 ipv6 ...
0 votes
0 answers
55 views

Why does bitcoin core has to reindex the chainstate directory in some cases?

I was reading that some people were able to migrate their old index directories to a new machine and not needing to reindex. But for me it acts as if the chainstate directory is "corrupt", ...
3 votes
1 answer
529 views

How do I calculate transaction fee for call to createpsbt()?

When my user invokes my app, he passes as an input parameter the desired value of the TX fee in satoshis per byte. I create a PSBT by calling createpsbt(). I exert complete control over the ...
0 votes
0 answers
35 views

Can I setup a private testnet full node to reduce the testnet gas?

As the title described, I want to set up a bitcoin private testnet full node, in order to reduce the gas I send the transaction.(the transaction I sent to my node can be mined by my node. But I think ...
1 vote
1 answer
19 views

How to connect Sparrow with Bitcoin Core on Mac?

Trying to connect sparrow to core. Sparrow gives out this error Could not connect: Cannot find Bitcoin Core cookie file at [file path] Everything was working fine until I toggled with sparrow ...
0 votes
3 answers
3k views

How would I ever know if my solo miner found a block?

I've tried solo mining in two ways: using cgminer, ASIC and ckpool using minerd connected to my own instance of bitcoin-qt. Either way, I've never seen any indicator showing that I have mined 0 BTC, ...
2 votes
1 answer
60 views

What's the difference between the 3 index directories "blocks/index/", "bitcoin/indexes" and "chainstate"?

What's the difference between the 3 index directories I have in Bitcoin Core: bitcoin/blocks/index/ 129 MB bitcoin/indexes/ 59 GB bitcoin/chainstate/ 5 GB The size of "bitcoin/blocks/index/"...
0 votes
1 answer
93 views

How can I recover bitcoin core wallet after encryption with password?

I have backup of wallet.dat file before I encrypted it with password. I also do know the password. I deleted my server and all thing has gone but I have back up of wallet.dat file in computer. I send ...
1 vote
1 answer
136 views

How is the progress field of Bitcoin Core's synchronisation/Initial Block Download debug logs calculated?

The debug.log file during Inital Block Download (IBD) typically includes something like the following1: 2023-09-09T10:04:32Z UpdateTip: new best=...
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0 answers
51 views

Made a report how long for reply? [closed]

I have sent four amounts to same wallet. First two arrived ok. Last two wallet owner claims has not received. I sent owner screen shots from my deposit to confirmed received to my payments included ...
0 votes
1 answer
257 views

Should I use Electrum Wallet OR Bitcoin Core as my website's payment gateway?

I'm a developer who is building a website that need to process Bitcoin payment requests. So I need a payment gateway. In my last project, I used Electrum wallet as payment gateway but my last ...
3 votes
1 answer
251 views

Miner for Non-Standard Transactions

I understand that bitcoin-core introduced the IsStandard() check in v0.9(?) to prevent non-standard transactions from being broadcast (unless in a mined block). I'm interested to know whether there ...
0 votes
1 answer
61 views

Consensus Question

With all the recent developments of the spammers and those who want to filter them. I have a few things I don't get. They mention the bug that wasn't fixed (CVE-2023-50428). As I understand, this &...
1 vote
1 answer
2k views

Importaddress taking a long time to run / does not work

When I try to run importaddress using the core client it takes a long time to execute, over 10 minutes, even though I have supplied a "false" argument for rescanning. For example: bitcoin-cli ...
1 vote
1 answer
580 views

I formated my hard drive with bitcoin core on it

First timer here ...I downloaded bitcoin core a few weeks ago until last week where it still had not synced so i started all over...I was originally waiting for BTC CORE to synchronize(I missed the ...
-1 votes
0 answers
17 views

Hello. How long will it take to transfer my 02/Bitcoin to the wallet that I deposit. Thank you [duplicate]

How long will it take to transfer my 02/Bitcoin to the wallet that I deposit. Thank you
1 vote
1 answer
184 views

how does node validate scriptSig

Let's say I sent some BTC to Bob, so I created a transaction (forget about scriptPubKey) since let's say I was able to prove it by executing scriptPubKey. so After I sent BTC to BOB, new transaction's ...
2 votes
1 answer
132 views

How is “progress per hour” calculated?

How is “progress per hour” calculated? What would be the shell script code to return this result?
1 vote
1 answer
142 views

Why is there a "progress increase per hour"?

When syncing the blockchain with Bitcoin Core, why is there a "progress increase per hour"? Why wouldn't the syncing rate be constant?
0 votes
1 answer
112 views

how to update the original version of bitcoin-qt

I have the original version of Bitcoin-qt and have been trying to update as I cant access my wallet. It has been running for weeks but when my internet drops out, the process starts again. I there ...
1 vote
1 answer
35 views

How does subtractfeefrom work?

From the description of Bitcoin Core, subtractfeefrom is a parameter to define which recipient address would opt-in to receive less and contribute to pay the fee Here is a usecase: Alex has one UTXO ...
1 vote
1 answer
247 views

How can I tweak a private key in bitcoin core

I'm wondering what the workflow is for building tapscripts. I can generate a new address, but how do I tweak it with the tap script? I've done the bitcoin taproot workshop a couple times now and ...
0 votes
1 answer
37 views

How do I get Bitcoin Core's estimated confirmation time for a given transaction?

What RPC command can I run with Bitcoin Core (bitcoin-cli) in order to get a transaction's estimated confirmation time?
2 votes
1 answer
387 views

What possible explanation could there be that Bitcoin Core on Linux Mint claims to but does not save the wallet backups?

Linux Mint. Bitcoin Core 0.21.0. I go to "File" and "Backup wallet", then select any location. I've tried with /home/a and /tmp and others. Every time, Bitcoin Core says that the ...
0 votes
1 answer
48 views

Incorrect passphrase after cancelled transaction

Bitcoin Core after sending the transaction showed the incorrect balance and the transaction was cancelled. During that incorrect balance there was a sending operation after which the bitcoin core ...
0 votes
2 answers
100 views

Why changing Bitcoin Cap Limit Is Not Possible

To alter the Bitcoin blockchain protocol, such as increasing the Bitcoin cap, a consensus among the majority (95%) of participants is necessary due to decentralization and the consensus mechanism. ...
0 votes
1 answer
101 views

Network traffic peaks for Bitcoin Core GUI Node

I have the latest version installed, no SOCKS5 connexion. Sending maximum is around 4500Ko/s (also seeable on the picture). Do you know why it goes up like that ?
1 vote
1 answer
54 views

How to configure port forwarding to run Full Node with Bitcoin Core using VPN instead setting up port forwarding on router?

I'm running full node with Bitcoin Core, but unable for incoming connections due possible block of my ISP, port forwarding on router doesn't take effect. Then I created a VPN on Proton VPN service and ...
1 vote
2 answers
435 views

Gitian building not working

I followed this instructions https://github.com/bitcoin/bitcoin/blob/master/doc/gitian-building.md but on this step: https://github.com/bitcoin/bitcoin/blob/master/doc/gitian-building.md#setting-up-...
1 vote
1 answer
503 views

Move all coins from an address via RPC

Let's say I generated some coins with a given address and I want to send a specific amount of coins to a specific addresses, and move the remaining balance to another specific address. I want to do it ...
0 votes
1 answer
1k views

how to connect to bitcoin node in javascript without running a local node

I am trying to get some bitcoin network data and I am using bitcoind-rpc library. If i just run their example: var run = function() { var bitcore = require('bitcore'); var RpcClient = require('...
-7 votes
0 answers
44 views

Bitcoin is for FOOLS [duplicate]

Have you guys run out of FOOLS yet? This is nothing more than a PONZI scheme. So you support censorship as well I see. I am asking a valid question, yet you will not post it? Why is that? Because you ...
2 votes
1 answer
150 views

Does testmempoolaccept check all possible rejection rules?

Is there any rejection rule that testmempoolaccept will not check, or is it safe to assume that if it passes testmempoolaccept validation it will be at least broadcast? Mostly concerned about complex ...
5 votes
0 answers
157 views

How does bitcoin core handle service flag spoofing?

There are 5 service flags in src/protocol.cpp: static std::string serviceFlagToStr(size_t bit) { const uint64_t service_flag = 1ULL << bit; switch ((ServiceFlags)service_flag) { case ...
0 votes
2 answers
48 views

What is the endianness of the target?

Let's take the latest bits value, at the time of writing: 0x170355f0 And convert it to the target: 0x0000000000000000000355f00000000000000000000000000000000000000000 When comparing a candidate block ...
0 votes
1 answer
114 views

How to generate coinbase transaction in Python?

I know that on this forum a lot of questions on this topic, I have checked most of these, but can't find the solution for my task. I am creating my own algorithm for solo mining bitcoin on Python. I ...
0 votes
1 answer
58 views

Nonstandard type script's address [duplicate]

I have nonstandard tx output. txid is 03acfae47d1e0b7674f1193237099d1553d3d8a93ecc85c18c4bec37544fe386. And I want to express the tx output with specific unique address. Blockchain explorers all seem ...
1 vote
1 answer
39 views

Old wallet, stuck transaction [duplicate]

I have an old wallet from about 10 years ago that I found in Bitcoin Core. I tried sending the balance to a different wallet I use but the transaction just sat as pending. Looking for help on what to ...
0 votes
1 answer
668 views

Error: Unable to start HTTP server. See debug log for details

I have been looking around quite a bit about ways to solve this error and none of them have worked. To give some context, I am running a full node on a raspberry pi and everything is working just fine ...
0 votes
1 answer
164 views

Bitcoin Core shows addresses that Electrum says don't belong to my wallet (imported MPK via EPS). What is going on?

I got a full node (pruned) up and running with Bitcoin Core via Tor. I installed Electrum Personal Server (EPS) and connected my hardware wallet with Electrum via Tor. I generated a watch-only wallet ...
1 vote
1 answer
2k views

Installed bitcoin-qt and Tor, allowed firewall, Tor connects, but Bitcoin doesn't

I did these things but Bitcoin still says 0 connections. What's the problem? Windows 7 32bit. Installed bitcoin-qt Installed Tor Browser bundle I allowed all local outbound connections in my firwall (...
5 votes
5 answers
15k views

How to install Berkeley DB 4.8 on Linux?

The Unix build notes do not show how to install version 4.8 apart from saying BerkeleyDB is required for the wallet. Ubuntu and Debian have their own libdb-dev and libdb++-dev packages, but ...
22 votes
5 answers
49k views

Bitcoin-Qt setup: Change block-chain file location, settings? documentation?

I am installing Bitcoin-Qt and have been reading about Bitcoin basics, but I found very little information on the client. I have a few questions about the Bitcoin-Qt program (v0.8.1-beta under Windows ...
0 votes
1 answer
763 views

"Invalid address" when trying solo mine with bfgminer

I am trying to mine solo. I have installed BitCoin Core on my Windows box, set up incoming connections and wrote in config file <BitCoinStore>/bitcoin.conf server=1 rpcuser=myusername ...
0 votes
1 answer
114 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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