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Questions tagged [bitcoind]

Bitcoind is a program that implements the Bitcoin protocol for command line and remote procedure call (RPC) use.

bitcoind is a program that implements the protocol for command line and use. It is also the first Bitcoin client in the network's history. It is available under the MIT license in 32-bit and 64-bit versions for Windows, GNU/Linux-based OSes, and Mac OS X.

Prior to version 0.5, this service-provider client used a GUI as its default GUI. It is now instead bundled with Bitcoin-Qt.

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call bitcoind rpc api over docker

I started my node container with this flags: daemon=1 printtoconsole=1 testnet=1 rpcport=9332 rpcallowip=0.0.0.0/0 rpcuser=user rpcpassword=password rpcbind=0.0.0.0 server=1 I opened port in my docker-compose : node: image: bitcoin-sv …
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How to install bitcoind on Ubuntu 20?

I am having the trouble with installation of bitcoind on Ubuntu v20 VPS system. How i try to make it done with official tutorial: "If you use Ubuntu, you don’t need to compile bitcoind and bitcoin-cli from source. You can simply add the official…
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bitcoin-cli: how to create a wallet and utxo address

I am a relative newbie in bitcoin and blockchain and hope you can help me with some of the questions. So I launched a "regtest" network and generated 101 blocks using bitcoin-cli -regtest generate 101 Now, if I launch 'bitcoin-cli -regtest…
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Bitcoind: Corruption: block checksum mismatch

While indexing blocks I have error in debug.log: 2016-11-14 15:14:52 UpdateTip: new best=000000000000038ad111e773453f172891263e1a7a2bca9b2017ac474c54fb0c height=211020 log2_work=69.125688 tx=9563053 date=2012-12-05 20:04:23 progress=0.029749 …
Michał Wanat
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BITCOIND: ThreadRPCServer incorrect password attempt from 127.0.0.1

I have my Bitcoind server running on Ubuntu 14.04. The blocks count is updated and its running well. My problem is that when I access Bitcoin RPC using this curl command curl --user user_bitcoin:pass_bitcoin --data-binary '{"jsonrpc": "1.0",…
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In what scenarios can the blockchain size decrease for bitcoin?

I am running a private bitcoin network for which I changed the target time between two blocks to 12 seconds and the difficulty adjustment to 25 blocks interval. I ran the network for about 4 hours with 50 nodes. In one of the node's logs I observed…
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How bitcoin peer discovery works after connecting to hard coded nodes?

I am tinkering with the bitcoin source code and trying to understand the exact working of peer discovery mechanism in the testnet mode for which I have made the following changes: Disabled the DNS seed discovery in order to force bitcoind to…
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Why walletnotify occurs three times?

Walletnotify of my bitcoind occurs three times. Once, when new transaction received and twice when there is a confirmation. I have to know if that ok? Because everywhere I could read, I find, that walletnotify should occur two times only. Once when…
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add a RPC password to your bitcoin.conf file

I'm following instructions here and it says that I will find a bitcoin.conf file Windows: %APPDATA%\Bitcoin\ and To use bitcoind and bitcoin-cli, you will need to add a RPC password to your bitcoin.conf file. Both programs will read from the same…
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Extract all confirmed transactions from a bitcoin block using python

I want to extract all confirmed transactions from the bitcoin blockchain. I know there are repos out there (e.g. https://github.com/znort987/blockparser) but I want to write something myself for my better understanding. I am have tried the following…
DonkeyKong
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What actually is wallet.dat hash and how does hashcat actually brute force the hash?

I will try my best to simplify my question. I just extracted hash from a wallet.dat file and it looks like this: $bitcoin$64$b198b8303389b0aba9dec671bafb51f421f001a665317f1d155a1371c82c6dcd$16$2536019a6f48b3de$128125$2$00$2$00 As per my research, I…
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Moc file not created during QT Creator Build

I am building a core for an alt-coin and it has a QT wallet (GUI) that comes with the software. My .pro was loaded into QT Creator and I've built and run my GUI wallet once but I had dynamic library issues with the app outside of QT Creator. Anyhow,…
David Whitehurst
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PHP Bitcoin wallet/transfer interface

First, I need to tell that I'm pretty new about Bitcoin. I'm asked to build a Bitcoin Exchange website. I'll have a server which I plan to build with Linux and PHP. -All the transfers will be issued manually So we will have an online wallet and…
Rasko
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Is it necessary to run a bitcoin node in order to interact with bitcoin blockchain?

Was looking at libraries for bitcoin node implementation like bitcoin-ruby and toshi. I guess my question is quite basic but I'm a newby here: Is it necessary to download the entire blockchain (and even set a node) in order interact with it as…
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Bitcoin poisson density into code

The following is from the Bitcoin whitepaper. The goal was to calculate the probability (P) an attacker could get lucky and override z number of blocks with q is the percentage of the network in control. I'm interested in moving backwards from…
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