Questions tagged [bitcoind]

This tag should be used for questions related to bitcoind, the command-line software for Bitcoin Core. It stands for "Bitcoin Daemon" where a daemon is any computer process which runs in the background ("service" in Windows terminology).

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How can I send all coin from bitcoind in one command without being manually involved?

I have tried with the commands below sendtoaddress <address> `bitcoin-cli getbalance` "" "" true sendtoaddress <address> "bitcoin-cli getbalance" "" ...
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Problems with multiple wallets on RPC in bitcoin-core

I have been playing around a bit with Bitcoin Core (version 23.0), more specifically connecting to different wallets in Bitcoin Core through RPC in Python. I have found this library and tried to ...
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Dust threshold for Testnet

I want to find a dust threshold following this answer: https://bitcoin.stackexchange.com/a/86069/134293 Actually I have a list of transactions coming from listsinceblock in which there are Testnet ...
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Same blockhash that appears more times in a bitcoind’s rpc call listsinceblock transaction returned json

Let's suppose that listsinceblocks return a json like this: { "transactions": [ { "involvesWatchonly": true, "account": "", "...
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Consider only deposits in a bitcoind’s RPC call listsinceblock transaction returned JSON

I have a JSON result of a bitcoind’s RPC call listsinceblock. There are 4 categories of transaction: "send" means transactions sent "receive" means non-coinbase transactions ...
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Can a receive transaction be 0 in a bitcoind’s rpc call listsinceblock transaction returned json?

Suppose that I want to check all the valid deposits of the results of bitcoind’s rpc call listsinceblock transactions, can I found a ‘receive’ transactions with ‘amount’ as 0? Should I consider that ...
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How do I run the invalidateblock command on bitcoind?

For a particular need I need to restart with the chain from a specific previous block. I thought about using the invalidateblock command, but it's a bitcoin-cli command and if I run it on bitcoind it ...
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1 answer
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Unable to verify Bitcoin 23.0 release due to developer keys being untrusted/uncertified [duplicate]

I have precisely followed the instructions for attempting to verify the latest 23.0 release of bitcoind on Linux, available here: https://bitcoincore.org/en/download/ I have gpg imported all the keys ...
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Is taproot considered nonstandard to older clients?

When asking an older bitcoind node to broadcast a transaction which includes or spends a p2tr output, how will they respond? Will they broadcast the transaction? Will only certain bitcoind versions ...
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What stops someone from tampering with node software and hence would be able to disrupt the blockchain?

For example, if someone was running a full node and somehow re-wrote the software so that blocks and transactions which did not abide by Bitcoin's consensus rules would be able to be relayed, what ...
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My Bitcoin-QT directories are empty? (Ubuntu)

According to Bitcoin-QT (I am using the snap store version) my Datadir is /home/(username)/snap/bitcoin-core/common/.bitcoin and my Blocksdir is home/(username)/snap/bitcoin-core/common/.bitcoin/...
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How to run Bitcoin client in Server mode

How can I run a Bitcoin Client in a server mode. Can someone provide step-by-step directions on how to do that? Thank you
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Get transaction history of a single Bitcoin address as CSV

It used to be easy to export transaction history using blockchain.info in .csv format. example That functionality is no longer available. (Also checked mempool.space and others) Is there another easy ...
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Connect to ZMQ's tor hidden service

Is it possible to create a hidden service with torrc configured as follows to connect lnd on vps to bitcoind at home? HiddenServiceDir /var/lib/tor/zmq_block/ HiddenServicePort 28332 127.0.0.1:28332 ...
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Should my bitcoin core node be reachable before it has fully synchronized with the block chain?

I just set up Umbrel on a Raspberry Pi 4 and my internet connection is fairly lacking so the blockchain synchronization is taking a long time (currently it is at 1.65%). While that's going on, I'm ...
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bitcoin - lightning network - docker: connection problem

I use this docker-compose file to create 2 users and I was able to make a payment over lightning on regtest. The tutorial was made with btcpayserver/bitcoin:0.18.0. Now I want to upgrade this image to ...
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Limit in adding Watch address in bitcoin core

Is there any limit in adding number of watch address to bitcoin wallet? Am thinking of adding thousands of address to watch list. If i do so what are complications we may face, performance impact?
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Can I connect from lnd on vps to bitcoind on my home network?

I want to change my lnd on ec2 from neutrino mode to full node mode and connect to my Umbrel bitcoind at home, I do not want to use ssh tunneling as much as possible and would like to connect to ...
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Generating bitcoin core -rpcauth argument using golang

We're developing a Blockchain deployment solution kotal, and generating -rpcauth argument from the supplied user name and password. The problem is when we try to use the same user and password using ...
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Check bitcoind version at startup in Rust

I'm trying to write a code in Rust to sanity check if the bitcoind version of the local machine is upto date with the version that we are currently using in our organisation (say v22.0.0). We have a ...
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1 answer
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Is it possible to set multiple JSON-RPC users?

I am passing multiple -rpcuser and -rpcpassword options, but the last user is the one that's working ! I was assuming that I can set multiple JSON-RPC users.
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Is Running Bitcoin Core (bitcoind) On Android Termux A Good Idea?

This is what I did: Before we begin, disable Google Play services and Google Play store to reduce conflict with app on F-Droid. Decentralization gets us even further with what I figured out. Install F-...
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1 answer
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C-lightning configuration to use bitcoin blockchain data from another machine

I currently run a lightning node on umbrel on a raspberry pi. I want to experiment with c-lightning and want to run a new c-lightning node on my ubuntu laptop which utilizes the blockchain data from ...
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1 answer
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Disable Bitcoin core JSON-RPC server?

Is it possible to disable JSON-RPC server ? It seems like it's always on.
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1 answer
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Bitcoin RPC not reachable: Cant bind RPC server to IPV6

I tried every different combination in bitcoin.conf to make my bitcoin node (hosted in AWS protected behind VPN) reachable but nothing seems to work... Just to clear it out of the way, I opened the ...
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different 'vout' formats

Using bitcoind rpc, I have been looking at the content of 'vout' records for a few (coinbase) transactions and don't understand the difference between them. Looking at block 710000, the coinbase ...
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Is there a detailed documentation on RPC API bitcoin developer documentation

developer guide on https://developer.bitcoin.org/reference/rpc is not very detailed on mining section. Where can I find a detailed documentation with examples
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Bitcoin Core txindex not completing successfully

I am running a full node on Ubuntu (20.04), Core version 22.0.0, which is fully synced up to around 72500 blocks at this time. I am wanting to completely index the full chain however this has not ...
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1 answer
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How to regularly restart bitcoind after some period of time on Linux

If, like me you wish to automatically restart bitcoind after some period of time, or if it crashes at least it will restart sometime on it's own you know that it can take a long time on Linux before ...
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Want to run a secondary node on a new machine and want to use the blockchain data of existing node

I run a lightning node (umbrel, raspberry pi). I wanted to build a secondary node(c-lightning) on my laptop (ubuntu), from scratch. I followed some steps from their github but I'm now confused the the ...
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1 vote
2 answers
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How to manually throttle CPU to make computer run cooler?

I am experimenting with Bitcoin initial block downloads. One of my tests is running on a ThinkPad X1 Yoga and computer is getting pretty hot. It it possible to manually throttle CPU to make computer ...
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1 answer
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Why can't Core CLI query wallet balance when loading block index or verifying blocks?

Why can't Core CLI query wallet balance until having loaded block index and verified blocks? It takes a few moments when running the test and sig nets, but when running the main net it is tough for my ...
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How to fix corrupted blocks?

I am trying to copy blocks from Debian 10 “buster” virtual machine to external SSD which I will boot from on a Raspberry Pi. rsync --archive --delete --human-readable --info=progress2 /home/bitcoin-...
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1 answer
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Is there any web3.py equivalent for Bitcoin?

Is there a good python library to connect to my locally running bitcoin node and query it? Such as view data block by block, txs, network difficulty at the time of each block, and other parameters? ...
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Error in configuring Qt with Bitcoin Core on Windows

I was following this (https://github.com/bitcoin/bitcoin/blob/master/build_msvc/README.md) documentation to install Bitcoin core on Windows 10. I have successfully configured Bitcoin core with ...
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How to serialize the CBlock Class in C++ and print the hex to terminal?

I have tried to serialize as follows without success: bitcoin tag v22.0 from github. In the file src/miner.cpp and the function function std::unique_ptr<CBlockTemplate> BlockAssembler::...
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1 vote
2 answers
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Is the 'Remote' In 'Remote Procedural Call' something of a misnomer?

My understanding of an RPC is that Bitcoin-qt (client) will send an RPC to bitcoind (or an instance of bitcoind on another machine if the configuration settings are changed to make that happen) and ...
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1 vote
1 answer
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How to download just the blockheaders for the blockchain

I'd like to download all the blockheaders for the blockchain directly from the network (not an external API) ... what is the best way to do this? I don't actually care about the transaction data and ...
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1 vote
1 answer
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loadwallet takes too much and times out

Hardware is too old and wallet was too much unsynchronized. Loading the wallet took so much time, it timed out (pending missing console output).
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Connecting A Wallet To A Pruned Node

I've connected sparrow wallet to a pruned bitcoin node but all my utxos are not showing. I would imagine that since I haven't spent them and since pruned nodes still keep the entire bitcoin UTXO set, ...
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1 vote
1 answer
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bitcoind not sending index nor blocks to inbound connections

Currently, I am following the recommendation of running a full node on my desktop with bitcoind; it has most of the blockchain downloaded (~680000 blocks) and is not pruned. Then I have two laptops ...
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starting mining with bitcoin core once installed

How do I start mining once installed and running? I don't see the bitcoin balance changing at all. What am I doing wrong?
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How to run Bitcoin-Qt over RPC to another machine

I have a full node running bitcoind on computer A. On computer B I have bitcoin-cli setup to connect to computer A over RPC. Computer A is a headless machine. I don't want to re-download the chain ...
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1 vote
3 answers
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blockchain.info like wallet api

I'm trying to build an API similar to the blockchain.com wallet API so that I can send and receive bitcoin on my e-commerce site. I have a docker container running a pruned node and I'm using another ...
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1 vote
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Can't query own node

I'm trying different ways to query my own bitcoind node on testnet but I'm failing every time. Tried using bitcore's API and nodejs: async function tryBitcoin() { const data = await axios.get('...
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How best to check the balance for a specific address using the Bitcoin-CLI?

I am currently calculating the balance of addresses from "listunspent" $unspends = $btc->listunspent(6, 9999999, array($PARAMS['address']))['amount'] But I don't think this is the ...
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1 vote
2 answers
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how would you test a bitcoind/bitcoin-cli without syncing?

I want to be able to test bitcoin without waiting literal days, is it possible to run a local node that doesnt require sync?
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1 answer
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Sync data (blk.dat) only with bitcoind

The purpose is to sync the all the blk data into local computer for analyzing. Is that possible to sync data (blk.dat) only with bitcoind? Or is there any other solution available?
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I used support bitcoin wallet address by mistake! How do I get that back to put into my wallet

New to bitcoin and I use their support Bitcoin wallet address instead of using my wallet. How do I get those funds back?
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3 votes
1 answer
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Import all wallet addresses efficiently for explorer

I'm trying to build an explorer and I need to pull information about the wallet address such as transactions. Do I have to loop through everything with importaddress or is there an easier way? I ...
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