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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18 views

How can I be able to automate BTC deposit and withdrawal on my site? I need help [closed]

I am building a site and I need to automate the btc deposit and withdrawal. kindly give me some useful info how my web dev could do it? thanks in advanced.
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Online BTC wallet implemention with bitcoin-core

I have written a php code to register users and create wallet for them on bitcoin-core full node.My question is how can i manage users wallets.if i use loadwallet to load USER A wallet and get address ...
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can I have a mining node and only accept a transaction for an ip? [closed]

I would like to have mining node to mine bitcoin transactions but I want only do it for a specify ip, can do that ? or it's better to have a mining node and join it to a mining pool and and make it ...
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37 views

Unable to make custom Bitcoin command

I'm writing a thesis on Bitcoin system and as a part of my assignment i have to explore Bitcoin-core source code. I 've downloaded the code, compiled it and manage to run it. However, I wanted to ...
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1answer
25 views

Is the index db downloaded from peers or generated locally?

When the user start the Bitcoin client for the first time, it will download the whole blockchain. But what about the block index (blkindex.dat in older versions) ? Is it downloaded from peers just ...
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Problems Setting a Transaction Fee on a Per Transaction Basis Bitcoind

I've spent hours and hours trying to find a solution to this problem, with no success. Using Bitcoin Core on a Linux machine, so using bitcoin-cli to process commands back to the daemon. Here's what ...
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1answer
33 views

Bitcoin full node running on Synology not visible to network

Last week I bought a Synology (918+) and starting running a Bitcoin full node (https://hub.docker.com/r/kylemanna/bitcoind). To check whether the Bitcoin node can be found by the network, I checked ...
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1answer
35 views

Is there any method to extract transactions for an bitcoin address which is not in my wallet using bitcoin core?

I have setup Bitcoin core and trying build an API to fetch all transactions under an address ( not in my wallet ). Bitcoin core RPC documention says that an address which is not in my wallet needs to ...
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26 views

2-3x increase in peers banned by bitcoind

In the last week, with no changes to my node's configuration, I've noticed my node is auto-banning peers at 2-3 times the rate of before. Where usually I'd have 25-30 peers banned every 24 hours, the ...
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1answer
24 views

How to calculate the checksum of an extended public key?

Very difficult to find definitive info on this. From what I can find on google and looking at BIP32 it seems like the process to calculate a checksum for an extended key is to decode the base58 ...
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1answer
34 views

Send bitcoin with bitcoin core without syncing to network

I want to use bitcoin-core just for sending bitcoin from my address to another destination address. i don't need the huge history information of blockchain. In fact, I want to run a light-weight ...
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1answer
32 views

How to getheaders from blockchain?

I have run a full node on linux now I can run commands with bitcoin-cli like: bitcoin-cli getbestblockhash it returns: 0000000000344240308f54ded700542571b3df9efe05fab92e669099e20e0d92 or bitcoin-...
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1answer
41 views

Step by step to make a SPV bitcoin node

As I know, there is a light node version called SPV. for now I have started a full node and it has downloaded 82222 blocks, but I don't want to have a full node with full blockchain, my purpose is to ...
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ThreadRPCServer incorrect password attempt from 127.0.0.1:34810

I am reading Mastering Bitcoin book, and on: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch03.asciidoc#full_index_node there is a call to bitcoin node: $ curl --user myusername --data-...
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1answer
26 views

Number of bitcoind peers drops precipitously every 30 days or so

I run bitcoind headless on a linux box with maxconnections=256 and port 8333 open on the router. Using Bitcoin Node Manager I monitor node status occasionally. Peer count of course starts at 8 and ...
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1answer
194 views

Why did the core developers choose base64 for PSBT encoding?

Why does bitcoind use baase64 to encode PSBT's? Just out of curiosity.
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22 views

Is it possible to configure bitcoind to allocate blocks in larger “chunks”?

In the bitcoind log there are many entries similar to this: Pre-allocating up to position 0x200000 in rev02037.dat There are often several messages regarding pre-allocation of the same file. This ...
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23 views

How to connect a bitcoin node to a complete node through the local network?

I currently have a full bitcoin node on my local network and I would like to create another node but only update it by local network. I have tried with: ./bitcoind -connect<iplocal> ./...
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How to sign Raw Transaction with Multiple Inputs

What is the procedure to sign a raw transaction with multiple inputs, i have some doubts, this is what i am doing: Step 1 First I serialize 1 unsigned tx for each input. INPUT 1 02000000 // Version ...
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1answer
29 views

Bitcoin peer info

Why when I run in the node bitcoin-cli getpeerinfo the list is an empty array? Do I need to let time to connect other peers?
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19 views

Parsing JSON in bitcoin-cli

I am learning the Bitcoin-cli, and when I run a command like getbalances, I get a JSON with "mine" and "watchonly". Is there a way i can only return the watchonly portion? My broader question is can I ...
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Bitcoin core Rpc EOF?

I using regtest to test bitcoin core rpc in golang. package main import ( "fmt" "github.com/toorop/go-bitcoind" ) const ( SERVER_HOST = "127.0.0.1" SERVER_PORT = 18444 ...
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1answer
31 views

Handling “dead” (double-spent) transactions in my mempool

Say I receive transaction A and it is in my node's mempool and unconfirmed. Then a block gets mined directly, which spends one of transaction A's inputs, rendering transaction A invalid. What can I ...
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1answer
49 views

getnewaddress won't generate bech32 or p2sh-segwit addresses

We are only able to generate "legacy" addresses that begin with a "1". This is a long standing problem generating new addresses using bitcoind and has persisted through a few recent versions of ...
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59 views

How to disable initial block download [closed]

I want to create an original network by forking bitcoind. I changed chainparams.cpp and other programs for loading it. Then, I set DNS for my seed node. When I boot my seed node, my seed node tries ...
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35 views

Why a transaction couldn't be found with bitcoin-cli after 11 confirmations?

I made a new address with bitcoin-cli getnewaddress: 39WqU8NJJasFjmaS2J4424UGVJn8Tqvh82 Then I initiated a transfer from some online service. The transaction is displayed with 11 confirmations: ...
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29 views

Find out dynamic IP address by querying bitcoin core

I'd like to use a dashboard page like Bitcoin Node Manager with Bitcoin Core. The summary page lists the IP address of the node, as obtained using bitcoin-cli getnetworkinfo. Bitcoin Core only seems ...
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57 views

How to make concurrent calls to bitcoin core rpc?

I am trying to call getBlock for 100k blocks, but it is too slow to call them sequentially. This is what I am trying. I have a full node of bitcoin core running. I set the -rpcthreads=100 and -...
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1answer
47 views

Create Custom script from bitcoind

I'm able to create multisig with bitcoin-cli with addmultisigaddress bitcoin-cli addmultisigaddress 2 '["'$ADDR_MITT_1'","'$ADDR_MITT_2'","'$ADDR_MITT_3'"]' But How can I add extra OP like CLTV or ...
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1answer
143 views

How Do They Get BTC Wallet.dat With Balance?

Going through YouTube, I found some videos on Bitcoin wallet.dat with balance. Looking at these videos, you will notice that these balances found in these btc wallet.dat are not on watch only ...
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2answers
49 views

What should I do to increase bitcoind sync speed?

My VPS has 2gb RAM and CPU core is 1 and 1 TB HDD storage. The sync speed is very slow. Currently it has about 700 MB free RAM. bitcoind is taking about 66% of the 2GB ram. Should I add 1GB more RAM ...
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52 views

How to transfer blockchain between two machines?

I have two computers A and B. A has a partial history of bitcoin blockchain (about 60% of entire history) which is not pruned (~120GB). I would like to transfer the history to B and run a pruned full ...
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How do I compile bitcoin-qt 0.13 for Windows 10 and use gdb (or similar) to debug it?

Currently I'm working on a fork from 0.13, so apologies if this is documented in later version. I'm cross-compiling bitocin-qt for Windows 10 (following the instructions in the build-windows document)...
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Using multiple wallets on one “bitcoind” process

Please how do I implement the code below in php Create a wallet for each of the clients using: bitcoin-cli.exe createwallet When you want to perform any action on any wallet simply use: bitcoin-...
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21 views

Fund single output in PSBT with bitcoind

I would like to create a PSBT with a single output (P2WSH with a given/predefined amount) in an app and give that to the user. The user should then be able to fund this PSBT with the help of bitcoind ...
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3answers
132 views

How To Create BTC Raw Transactions With 0 BTC Wallet And Broadcast It On Blockchain Network? [closed]

https://www.youtube.com/watch?v=2NFMMNXyHNE I watched a YouTube video of someone that created several BTC raw transactions with 0 BTC Wallet and broadcasted it on blockchain network with valid ...
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1answer
63 views

Opening a wallet with bitcoind

I am running bitcoind after previously running bitcoin-qt. I made a wallet with bitcoin-qt (and encrypted it) and I would like to open it now with bitcoind. The folder that contains the wallet.dat ...
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4answers
50 views

How does bitcoind choose its data directory?

Sorry, noob question I am new to anything linux related. I managed to set up bitcoin core just fine on my raspberry pi 4 and I have an external HDD that I want to use as my data directory for the 250 ...
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50 views

bitcoin core test config error

I tried configuring the bitcoin core test by editing the bitcoin.conf file with the required credentials. Earlier, before the writing the test credentials it was a running full node. now the error is ...
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35 views

how to use bitcoind “walletnotify” for unique transactions only

while using bitcoind "walletnotify" my curl command is getting 3 hits generating 3 unique transaction hashes but requirement is to execute only once for unique transactions. I heard about ...
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1answer
110 views

Is it possible to handle BCH transactions on Bitcoin Core wallet? [closed]

I've installed Bitcoin Core on a server and it works well for BTC. I would like to know can I use the same server and platform to support BCH too? I know that the addresses generated in Bitcoin Core ...
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1answer
26 views

Are the indexes generated by txindex=1 persisted to disk?

I'm running bitcoind with the option -txindex. $ bitcoind -txindex it seems to be taking around a day to fully index the whole blockchain. (I'm using a raspberry pi 4, 4GB of Ram, with an external ...
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1answer
66 views

bitcoind multisig transaction not shown as multisig transaction / shown as “signed” by 2:3

Seems like there was a change in how multisig transactions are being created. Running a node using bitcoind v0.16.3 and another one using latest bitcoind (v.0.19.0.1). The multisig transaction ...
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1answer
40 views

Bitcoin Core JSONRPC only accept requests with 0.0.0.0 in configs

I've lunched a Bitcoin Core server, and trying to connect to it via JSON-RPC. This is my configuration settings: server=1 rpcuser=admin rpcpassword=password rpcport=1234 rpcallowip=94.183.32.151 ...
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1answer
57 views

How to speed up first sync bitcoind?

I am running bitcoind version 0.19.0.1 on different cloud providers and it gets very slow at some point. After 300k blocks, CPU drops from ~90% to 5% and network usage drops to a minimum. I've tried ...
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42 views

How does peer banning work for onion peers?

If I start bitcoind with settings proxy=127.0.0.1:9050 to talk to the Tor daemon's SOCKS5 proxy, turn on listenonion=1 and set onlynet=onion, my understanding is that bitcoind will coordinate with the ...
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45 views

Bitcoind not publishing blocks via ZMQ after reorganization

On the testnet, I am running a bitcoin core deamon (bitcoind) and am using ZMQ to receive updates about transactions and blocks (subscribed to both 'rawblock' and 'rawtx'). I was curious as to how ...
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34 views

how to move my Bitcoin core wallet to electrum while syncing

How do I move my btc qt wallet to electrum while syncing? Not address by address. Removed some addresses already but I'm still missing some coins. Don't understand the discrepancy. Any help would ...
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22 views

How can I do CDataStream to String to CDataStream conversion?

I'm developing a bitcoin application which saves Block to a file from which it can be read at later point of time. So I'm converting CDataStream vRecv to hex string using below bitcoin defined ...
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42 views

Bitcoin core doesn’t see transaction

I’ve created address in bitcoin core from rpc and send some bitcoins on it, but my balance still zero. Transaction exists I’ve checked on blockchain info. Getaddressinfo returns “ismine”: true, but ...

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