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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13 views

why is getdescriptorinfo returning a “function needed” error with a sortedmulti descriptor?

When trying: bitcoin-cli getdescriptorinfo "wsh(sortedmulti(2,tpubDFck48zH8ZzteKKZCR9WMVBJwHZayhQmtCDyDRzHsU7VMTwEXohD23h1CBiizKtFtWck2fVegNDRM193nGx3VLs1RTSGNc1iePKpc1JvsS6/*,...
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25 views

How to generate legacy receiving address in Bitcoin core 0.19.x.x

I must have missed the memo. I see Bitcoin Core 19.1.0.1 defaults to generating Bech32 receive addresses (prefixed with "bc1"), and offers a checkmark to generate P2SH addresses instead (prefixed ...
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22 views

IBD problem: Reindexing blocks and syncing starts over every time I shut and open Core

I am currently doing IBD in segments due to logistical reasons, but each time I safely shut down Core and unplug my hard drive (HDD, 1TB) and then plug it back in and start up Core, it starts in 2009 ...
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27 views

`bitcoind` RPC: ask if syncing headers or blocks

Is there a way to know from bitcoind RPC if it's syncing headers or blocks? And is there a way to know the header sync progress? Even if not directly available, is it possible to derive header sync ...
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19 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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26 views

Electrum server full node bitcoin core wallet- how to block all outside access?

i have read that with an EPS electrum server, other nodes in the network can "ping" your port , i believe the port no. was 8333. How can I for sure and for any situation block such accesses? The EPS ...
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22 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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20 views

wallet.dat on usb to electrum

I put my btc qt wallet.dat file on a USB and would like to open it on a software wallet. Preferably electrum. Is that possible? If so how? Too many problems with btc qt and takes forever to sync.
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25 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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29 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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27 views

Do you need to run own server when using a full node wallet?

Hi can you help out pls: 1) There are some full node wallets like Bitcoin Core or Wasabi. What other full node wallet apps are available to select from for bitcoin? 2) I have read about people using ...
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25 views

Question about running full node electrum wallet

can you please help: 1) How can you run a full node wallet with electrum? what do you need? Or please link me to an understandable guide for that 2) Do you have to be online always or can you set ...
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31 views

How to use bitcoin from the command line in Windows?

Do there exist any stable and audited bitcoin wallets that can be used from the cli on Windows? I have looked but have been unable to find any that I can use for automated tasks.
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28 views

btc qt walletdump

I'd like to dump my entire btc qt wallet, while syncing, into an electrum wallet. I don't want to do it receiving address by receiving address. I already emptied out all my receiving addresses but ...
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42 views

Why keys generated in Bitcoin Core mismatch that from online generators despite using the same seed?

I have the following problem in Bitcoin Core. With this command: echo carpet begin bacon master draft fortune food cherry cage axis vault clown | \ bx mnemonic-to-seed | \ bx hd-new -v 70615956 | \ ...
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14 views

btc qt syncing but taking to long/dumpwallet debug console problems

Would like to transfer my btc qt wallet to electrum but having difficulties. My node is currently syncing Tried emptying out receiving addresses and was successful but there are still more coins in ...
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24 views

Is it safe to skip the initial block verification at startup?

The longest step in bitcoin core initialization is "Verifying last 6 blocks at level 3". The number of blocks checked at startup went down from 288 in 2014 to 6 now. Therefore, in order to speedup ...
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37 views

Cannot open dump wallet file (code-8)

Is anybody familiar with this problem using btc qt debug console? Would like to dump wallet and sweep into electrum.
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27 views

Hexadecimal Bitcoin Transactions

Suppose I have a random transaction which I recovered from blockchain blk****.dat file. How can I calculate the number of confirmations of this transaction? I dont want to use the RPC call ...
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21 views

How to display Recipient Address, Change Address & Transaction Amount

I have made A software in which i can Signed Transaction (From Electrum Un-Signed Transaction HEX), i just want to display the following thing to USER in Readable Mode : 1. Recipient Address 2. Change ...
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16 views

Trouble dumping btc wallet

Btc is syncing and taking to long. Would like to dump wallet and sweep in electrum. When I try the dumpwallet command I get "Cannot open wallet dump file (code -8)" What to do? Do I have to stop ...
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36 views

How to monitor Bitcoin address for new transactions?

I have some generated Bitcoin addresses which I want to monitor for newly received transactions, I have a full node but I don't want to import those addresses to the node's wallet. I don't want to use ...
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1answer
35 views

What is the 'tlv_payload' in lnd route?

When creating a custom route, if you use the queryroutes from lnd it sometimes with tlv_payload set to either True or False. How does the node figure whether to set this flag? I cant seem to find ...
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35 views

how do you transfer your Bitcoin core wallet while syncing?

I would like to transfer my btc wallet to an electrum wallet. Syncing is taking to long.
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1answer
44 views

Is there a 'command' to get the max supply of bitcoin that will ever exist using the bitcoin-cli?

I would like to know if there a way('command') to know what is the max supply of bitcoin using my own node without trusting a third party. Also if anyone could explain to me why : bitcoin-cli ...
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51 views

Calculate transaction fee for external addresses which doesn't belong to my local bitcoin-core server?

I am doing transaction on addresses which are created outside of my local bitcoin-core server using third party lib. I am having its private/public key. I am able to create raw transaction using "...
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37 views

Security trade-offs between centralized wallet system and a SPV wallet?

there are many wallets on the market. And I would appreciate if someone can clarify the key technical security advantages or disadvantages when using a SPV wallet vs a centralized wallet. I am ...
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45 views

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server?

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server? Actually i have generated the addresses using third party library and sent some ...
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1answer
27 views

Is it possible to set an overall seed for generating blocks on regtest mode?

I am using bitcoin core on regtest mode to simulate sending transactions. Is it possible to set an seed for things like generating blocks or signing transactions, so that you can recreate an exact ...
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1answer
18 views

Bitcoin P2P API getBlocks always returns 500 inv items

I'm trying to build a mini full node so that I can understand exactly how they operate. I've managed to get a few parts of the P2P api working however I am stuck with basic things like 'getblocks' and ...
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2answers
27 views

Does a trusted blockchain import from BitcoinCore require that chainstate and blocks be from the same source?

Can the chainstate folder from a pruned node be used with the blocks folder from a full node to provide the full blockchain? Assume that both nodes have been running for months. If the blocks folder ...
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1answer
43 views

How does Bitcoin Core manage its peer nodes? Is it possible to let it automatically switch to faster nodes?

It's usually frustrating when my Bitcoin Core full node is syncing, especially just catching up from merely several hours/days ago. I wonder how does Bitcoin Core manage its peers? Will it disconnect ...
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471 views

When will I receive bitcoins

Today I sent bitcoin to my bitcoin core wallet. I used an address under recieve bitcoins. The transaction has been cleared on the blockchain for several hours but is not showing up in my wallet. ...
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48 views

Why does my local blockchain keep getting corrupted if I use VirtualBox?

I have the full blockchain downloaded on a local USB external drive. This works fine if accessed directly from the host machine (Ubuntu-Desktop). However, If I try to load bitcoind from a VirtualBox ...
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1answer
33 views

Auto load all wallets when start up

Every time I restart my bitcoind, all the wallets will need to be reloaded: $ bitcoin-cli listwallets [ "" ] $ bitcoin-cli loadwallet test01 $ bitcoin-cli listwallets [ "", "test01" ] So I was ...
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1answer
36 views

Bech32 Multisig error: Witness requires empty scriptSig (code 64)

I've been able to do multisig between two addresses from electrum and one from bitcoind. [root@test bin]# bitcoin-cli -testnet getnewaddress n3JewuY82cprdRvxHdRNG8C3iTkJBKeLbz [root@test bin]# ...
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35 views

transfer btc core wallet to electrum

I am running a btc node and it is taking too long to sync. Is there any way to transfer the wallet to an electrum wallet? If so how? 1)Upgraded my btc node 2)Syncing 3)Transfer receiving addresses ...
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1answer
34 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 ...
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23 views

8333 failed after select(): Connection refused (111)

Hello I run bitcoind and i get this 8333 failed after select(): Connection refused (111). Can you help me with this? because it was working suddenly this happened.
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2answers
35 views

Running bitcoind in a different directory

I installed bitcoin core in windows 10 using ( Windows Subsystem for Linux ) . I installed ubuntu from the store and I used it to Install bitcoin core. The thing is everything was installed in the ...
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1answer
52 views

Why does a same transaction signed separately have different witness values?

I signed a bitcoin testnet transaction using nbitcoin library and got an output: ...
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1answer
38 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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1answer
70 views

Calculate Unspent using private keys

Can we calculate unspent of addresses which are generated from other node server if we are having private/public key of those addresses?
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1answer
59 views

How to quickly get the balance of any bitcoin address? (with no third-party API)

As some people have mentioned (eg. here), the only way to get the balance of an address in bitcoin core was to import it as a watch-only address and rescan the blockchain. Starting with bitcoin core ...
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25 views

How can I use backup up chain data from pruned node to set up (archivial) node without IBD?

My setup is an old (~2012) laptop + small SSD and a NAS with HDDs. I noticed that trying to sync Bitcoin Core (v0.18) on the NAS was slow, but on SSD was very fast. (Everything is connected via ...
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37 views

Why hasn't cold storage (offline signing) been supported by Bitcoin Core (GUI) up till now (0.19.0.1)?

Is there any deep reason not to support this? Or is this merely a "good idea, but no volunteers" situation? By the way, although Bitcoin Core had supported BIP32 several years ago, it uses hardened ...
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2answers
36 views

full node bitcoin, l have a 32 bit pc,can I run a node with an SSD?

full node bitcoin I have a 32-bit Windows 7 PC, can I run a node with an SSD?
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34 views

Where can one download the legit copy of bitcoin core software with hashes to verify?

Where can one download the office bitcoin core software? The bitcoin software that everyone is using. Just typing in "download bitcoin" in google, its quite confusing for newbies as you have bitcoin....
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58 views

Wallet Recovery with Bip39 Seed

From having a list of bip39 seeds, is there any way of recovering a wallet? In particular, I have a list of ~100 seeds--one of which is mine--and need an automate way of figuring out which is valid ...
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19 views

How to set up a private Bitcoin network with low mining difficulty

I wish to set up a two-miner private bitcoin network. The miners need to compete for the hash power and the block generation interval is also set to be 10 mins. I found some tutorials about regtest ...