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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2
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1answer
36 views

Is the ordering of blocks in the rev*.dat files same as the blk*.dat files?

I understand that blk*.dat files save the blocks in the order it gets them from it's peers. Is the rev*.dat files in the same order as the blk*.dat files? For example, would the 400th magicbyte in ...
1
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1answer
15 views

Wallet.dat in the mobile hard disk is not backed up after sending Bitcoin

Wallet.dat in the mobile hard disk is not backed up after sending Bitcoin, what can i do if the data recovery cannot found it? I have the original wallet.dat and private key, but there are no coins in ...
0
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1answer
25 views

How to find address that holds the balance in Bitcoin Core?

I am unable to find the address that holds my balance in Bitcoin Core. All receiving addresses has a balance of 0. But there is a balance in the wallet. How do I find the address that holds that ...
0
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0answers
10 views

Intermittent error “min relay fee not met” even with decent fee and custom Electrumx+Bitcoind

I have an automated system that sends BTC payments via Electrum for a client. Now, it happens again and again that payments keep failing with "min relay fee not met" (RPC call failed: {"code":-32603,"...
1
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1answer
23 views

How to implement getrawmempool?

I’m trying to get all transaction ids in the memory pool as json array. I just finish downloading bitcoin core and do now know where to begin. Any help would be appreciated!!
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0answers
31 views

Help to decrypt this notification [closed]

I am really fresh here and I got such notification AppCoin - Closed by 415 (+6%) New entry BUY: 395 Sat. (+-10) 1. Sell 420 Sat. (+6%) 2. Sell 427 Sat. (+8%) 3. Pamp 435 Sat. (+10%) 🏴 1. Stop - ...
0
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0answers
61 views

How to communicate with Bitcoin core 0.17 using bitcoinj for hd wallet creation?

Hi am building one hobby project and i want to perform some operations in my own bitcoin core 0.17 by using bitcoinj lib. so is there any way by which we can use bitcoin-core 0.17,bitcoinj for hd ...
0
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3answers
41 views

Private key generation method

How was bitcoin private/public key created in 2009, I observed in the blockchain some bitcoin transaction took place early 2009 Feb - April. In the original bitcoin core in github the first bitcoin ...
0
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0answers
12 views

Is it possible to generate a BitMessage-Vanity address?

I want to generate a vanity BitMessage address to receive and send message from. I this is possible for Bitcoin itself, but what about BitMessage?
0
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0answers
13 views

How to desgin blockchain with following properties? [closed]

How to design blockchain with following properties? a. I should be able to generate coin b. Anyone should be able to verify c. Owner should be able to spend
1
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1answer
28 views

Knowing if a public address is spendable by an HD seed?

I want to know if an address is spendable by an HD seed and for that purpose I am using the following command: > bitcoin-cli getaddressinfo 3LFc64RRd96ejjYvm14KaogBF9fmeNmePW | jq '.solvable' ...
1
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1answer
28 views

When exactly do the transactions get validated?

I have some gaps in my understanding to the life cycle of the transaction that I want someone to help me fill them specially with the validation. What I understand about the life cycle with my ...
0
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1answer
14 views

Difficulty in verifying bitcoin-core signing keys

How can I verify bitcoin0.19 signature bwith gpg? I read I should use gpg --recv-keys signingkey, but I don't understand where is the file signiggkey. I tried to download Bitcoin Core Release Signing ...
0
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1answer
38 views

Use hdseedid to give all addresses in bitcoin

I'm using bitcoin core version 0.18.1 and I'm studying Hd Wallet. I can see the value hdseedid, and I understand that it's HASH160 of my hd seed. Can I use this seed to retrieve all my keys? I tried ...
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0answers
34 views

Manipulation of Bitcoin RPC with programmatically

I'd like to use Bitcoin source code(only RPC part) to manipulate with programmatically. I have bitcoind and bitcoin-cli installed in my local computer but I don't know how to write code for my ...
1
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3answers
46 views

Is there a convention for how to order UTXOs in a transaction with multiple inputs?

I am not sure it matters to produce a correctly formatted transaction, but I am playing around with a wallet that does not keep its own private keys, but produces the raw txs to sign and want to give ...
1
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1answer
34 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 ...
0
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0answers
14 views

UnhandledPromiseRejectionWarning: RpcError: Requested wallet does not exist or is not loaded

I run bitcoind default wallet path.but ı request getballance from nodejs api return; UnhandledPromiseRejectionWarning: RpcError: Requested wallet does not exist or is not loaded I use ...
5
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1answer
62 views

How do I securely update Bitcoin Core?

I am currently running a Bitcoin Core wallet 0.18.1. What do I need to do to update it to 0.19.0.1 version? Would be very grateful for instructions as I am relatively new to this.
3
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1answer
184 views

How should I handle cases like this where the documentation for Bitcoin Core states one thing, and the actual program does something else?

Bitcoin Core's RPC API call "getnewaddress" is documented here: https://bitcoincore.org/en/doc/0.18.0/rpc/wallet/getnewaddress/ It claims: Result: "address" (string) The new bitcoin address In ...
1
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3answers
43 views

Bitcoin future mass usage for payments - how feasible is it without real privacy

The bitcoin is by many people believed to be used as a method of payment, just like fiat currencies, in the future. Apart from the other big use case of a stable store of value. But the payment use ...
0
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1answer
35 views

Bitcoin privacy - current state of privacy BIPs - is mimblewimble broken?

Community, what is the current state of privacy related BIPs? Anything on the roadmap by core devs to be deployed on main chain within the next year? IF yes, could you link me to this BIP(s)? And ...
1
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1answer
25 views

Does getblockcount return the correct block count when running in prune mode?

I am currently running a bitcoin node with prune=550. The getBlockCount from $ bitcoin-cli getblockcount does not match https://blockexplorer.com/api/status?q=getBlockCount. As I understand it, the ...
1
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0answers
48 views

Is it possible to use Bitcoin-core for multisig? Can it handle change addresses?

I have tried to import three xpub in a watch-only wallet as keypool with importmulti and a multisig output descriptor and to fill the first address with some BTCs. When I try to spend the newly ...
0
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2answers
49 views

are official bitcoin core released compiled with zmq in general?

I installed the binary and try to listen to ZeroMQ stream. But I got nothing out. Then I installed ZeroMQ but still got nothing. https://bitcoin.org/en/release/v0.17.1 so, are official bitcoin core ...
1
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1answer
15 views

getbalance says 0 for incoming TX even though 0-conf is allowed

> $bitcoin_rpc.getnewaddress("myaddress", "bech32") => "bc1q9kvfyjxtk9tvkzgpkf4x8zs42sddwlyanz3z6z" > $bitcoin_rpc.getbalance => 0.0 > $bitcoin_rpc.getbalance("*", 0) => 0.0 &...
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0answers
9 views

Move Bitcoin from account '' to default account

I am running Bitcoind and Bitcoin-cli for my RPC. When I run ./bitcoin-cli getbalance it does not return my correct balance, but when I run ./bitcoin-cli getbalance '' I can see all my funds. ...
0
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0answers
12 views

Which Bitcoin simulator can i use where changes in nonce size is possible?

I want to run a Bitcoin simulation in which I can have double nonce running in a loop on the block header, and I can also change the nonce sizes. which simulator can I use for this?
0
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1answer
49 views

Property based tests have been added to Bitcoin Core. What are they and could they replace some of the unit tests in Bitcoin Core?

Property based tests have been added to Bitcoin Core. This Dev article describes property based tests as randomized unit tests that in some cases could replace unit tests. "Generally speaking, ...
0
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1answer
28 views

Is it actually possible to install Bitcoin full node on a Raspberry Pi 3B+?

A Raspberry Pi 3B+ has only 1GB of ram and this official Bitcoin Core page shows that minimum requirement is 2GB ram and 200 GB storage with 100MB/s read and write speed. But I see a lot of articles ...
0
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0answers
23 views

Bitcoin testnet connection with node.js Api bitcoind v0.18.0

I can connect mainnet but can't testnet. I use bitcoin-core npm package. my client configuration: var client = new Client({ network:'testnet', host:'x.x.x.x', port:'18332', wallet: 'x.dat', username:...
0
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0answers
18 views

How to get concerned specific unspent(coin selection algorithm) from list of unspents in a wallet to calculate transaction size

I have a problem to calculate dynamic transaction fees. The problem which i am facing is to calculate the transaction size. When i have one unspent in my wallet it is too easy to calculate transaction ...
6
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2answers
162 views

Configure esplora to point to the bitcoind servers ip address

I have 2 servers running: Ubuntu 18.04 running bitcoind daemon (v0.18.1 full blockchain synchronized) Ubuntu 18.04 running esplora (the local single page website works, but it has no data from the ...
0
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0answers
17 views

problems with unconfirmed transaction of BTC deposits from wallet to wallet with fees paid in advance

i have just started using a BTC wallet called Luno but have 2 unconfirmed transactions still pending while only the 1 transaction went through. 1st transaction was a test with a small amount being ...
0
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2answers
41 views

Blockchain Explorer for local full node

I would like to build my own blockchain explorer because I have found that using the API's of 3rd party blockchain explorers only gives me around 2 or 3 requests per second. Does an open source ...
1
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0answers
28 views

BCH to paxful pls help [closed]

If can anyone tell me how I can recover my BCH I mistakenly sent to paxful wallet address though I'm still seeing unspent on my BCH wallet I'm so confused pls help
0
votes
1answer
18 views

Bitcoin 51% majority miner attack - question on the role of user activated soft forks as defense tactic

If one mining entity has alone 52% hash power of the overall network, then this party can block transactions for example and try to "build" up a forked, longer chain while time passes, right?. As I ...
0
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1answer
20 views

Bitcoin Orphan blocks - short question about the “time lag” factor and proof-of-work “size”

"However, it is possible that two miners produce a block at a similar time. This situation occurs because the acceptance of the blocks into the blockchain by the nodes of the blockchain network ...
2
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1answer
38 views

lightning network bitcoin howto install

Hello fellow bitcoiners, I would like to install lightning over Bitcoin core - I already have a full node. But every guide I follow ends up with a broken build or some issue preventing to finish the ...
0
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1answer
20 views

I get invalid argument error when running bitcoin-cli -getnetworkinfo, and a few other parameters

So I have bitcoind -daemon running and it appears to be generating the blockchain. keeps saying Potential stale tip detected, will try using extra outbound peer... The issue is I run bitcoin-cli ...
1
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1answer
36 views

Why I'm getting different merkleroot?

I'm using merkle.cpp code (which uses the libbitcoin library for some helper functions) from Mastering Bitcoin book. I was trying to re-create Merkleroot hash for Bitcoin block #100000 containing 4 ...
0
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1answer
22 views

Please take a look at my server print out to see if all looks well or if the repeating errors mean something is wrong

So it is not clear to me if my bitcoin server is syncing and all is fine or if the "potential stale tip detected, will retry extra outbound " message means I have to do something. Searching for that ...
2
votes
1answer
17 views

Is it possible to catch up missing blocks with zeroMQ if script was down for a while?

I use zeroMQ to get all new blocks (rawblock or hashblock). If my script is down for few minutes or hours and I missed few blocks, is it possible to catch up all missed blocks with zeroMQ when I ...
1
vote
3answers
50 views

How bitcoin application in production retrive UTXO's

AFIK, UTXO of an address cannot be retrieved using bitcoin-core, without importing the address in the wallet. How are application in production able to get UTXO ? Does all the application use ...
0
votes
1answer
34 views

What stopping miner from altering value in transaction to increase transaction fee?

I'm learning bitcoin through this book "Mastering Bitcoin, 2nd Edition by Andreas M. Antonopoulos". I'm at Chapter 6 "Transactions". Here is my doubt: Example there is node A, received transaction ...
2
votes
2answers
31 views

Difference between block hash and transaction hash in bitcoin-core

Is there a logic based on which one can determine if a given 32-bit hash corresponds to a transaction or a block without enquiring a bitcoin-client? In other words, how do I differentiate or ...
2
votes
1answer
33 views

If a court orders mining pools to seize funds, they will modify their software to do it, or be shut down' - can this happen?

I thought nodes could prevent this too. but if enough miners did do this, what could happen in worst case? thanks in advance for responding
0
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0answers
29 views

if bitcoin miner(s) changed the UTXO set would the bitcoin nodes reject the blocks?

if so, would this cause a Fork? or what would happen?
1
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1answer
46 views

does bitcoin-core support bip44 HD wallet

If bitcoin-core does not support bip-44, is there any other node ?
0
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1answer
47 views

Does bitcoin core 0.18 support bip44,bip39 (HD wallet)

I am new to bitcoin. Struggling to implement HD wallet. goggled for the same but did not get satisfied answer. Can we create multiple seed in single bitcoin core server? If yes, then how we can ...