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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Compiling Bitcoin Core v0.10.0 on Ubuntu 20.04

I'm trying to compile Bitcoin Core v0.10.0 on Ubuntu 20.04, but then I get the following error: rpcserver.cpp: In function ‘void StartRPCThreads()’: rpcserver.cpp:594:77: error: no matching function ...
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How can i solo mine with antminer? Using local bitcoin core

I am having trouble setting up mining with antminer. I have a gpu rig which is successfully mining with 2060 rtx on bitcoin with bfgminer at a hashrate of 1.5gh/s Obviously 1.5gh/s is nothing compared ...
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What is the most optimal Bitcoin Core-only OS for securing a new Bitcoin wallet?

I can't sleep at night due to my unencrypted cold storage wallet.dat having frequent contact with my Windows 10 nightmare machine. I've therefore decided to set up an old computer (with a 250 GB HDD, ...
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bitcoin feeless transactions

The mobile application cashapp specifically says I can send bitcoin to any address anywhere in the world for free. Coinbase also says they can do off the network transactions instantly and for free as ...
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How to create descriptor watch-only wallet with bitcoin-cli in Bitcoin Core 0.21?

Using only command line (no GUI), how can I create watch only wallet based on descriptor and get first unused address? This is the descriptor: "wpkh([00000000/84h/0h/0h]xpub6DP....xyz/0/*)#...
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Is bitcoin.org or bitcoincore.org the one to trust?

"Download Bitcoin Core": https://bitcoin.org/en/download "Download Bitcoin Core": https://bitcoincore.org/en/download/ I've been alternating between the two sites for years. I have ...
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2answers
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Is there a risk in entering my Bitcoin-Core wallet passphrase, if it's for sending all my available balance and never using that wallet again?

I have Bitcoin-Core wallet.dat with a single address and a small amount of bitcoins in it. Say I want to send all the available bitcoins I have, and then never use that wallet again. Can I use an ...
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35 views

Pros & Cons of Using the “Satoshi” Method to Track User Deposits

In this question user @lungj suggests using "satoshi" as a marker for user deposits. Another method I’ve seen used on bitcoin is using satoshis as a marker. For example, when paying for a ...
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Bare minimum system requirements for Core

The Bitcoin.org page on Bitcoin Core Requirements and Warnings lists three types of setups: # Type Disk Gb Gb / mo RAM Mb Windows 1 Bare Min (default) 350 8 / 150 512 7/8.x 2 Bare Min (custom) 5 5 /...
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Keeping Track of User Deposits with Bitcoin

I found the following statements about Bitcoin on the Ethereum SE: When using Bitcoin one can generate new address per user of service and save pair (address -> userId), so it is always obvious ...
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Brother died and I am sole survivor..just found out he has a wallet. How do I go about getting his bit coins I have no info [closed]

Brother died I am the sole survivor. I have no info..How do I retreive ..I have death certificate. Thank You LJF
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Which one is safer for a cold storage bitcoin-core or electrum?

Since bitcoin core and electrum uses different method in generating the wallet (BIP39 & BIP32). I wonder which one is the safer option to use for cold storage?
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Should I be using the “encrypt wallet” feature in Bitcoin Core?

All my wallet.dats have no password. However, the internal hard disk where the "live" one is located is encrypted, and so are the offline storage devices where I have my "cold" ...
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Verifying a P2WSH by hand

To test my understanding of the signing and verifying process i tried to verify some random Bitcoin transactions by hand. Sadly i got stuck with a P2WSH transaction, i choose the following transaction ...
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3answers
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Is there a script for bitcoin core which prints all spendable UTXOs given a private seed?

I am looking for an open source script or application which would take a private wallet key from the user (from terminal input or file, as mnemonic or xpriv string) and then connect to a bitcoind and ...
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42 views

How a new wallet knows balances locked in P2SH transactions?

If my old wallet created and submitted a P2SH TX to the blockchain, and I migrate to a completely different wallet, how can the new wallet detect that that UTXO belongs to me? Since the script is ...
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What is the best way to generate bitcoin wallet?

I am trying to create a cold storage, and I'm becoming so paranoid about everything on software and hardware (also afraid of myself forgetting/losing the wallet) related to the setup. I have read some ...
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What are the usability limitations of Core?

Some I know are: No HW wallet support No SPV mode Hard to use as an offline wallet Are there any others?
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Bitcoin.conf setting for CPFP - how can I enable longer 'chains' of unconfirmed transactions?

I often receive an -32700 'Insufficient Funds' error when attempting to create 'child pays for parent' (CPFP) transactions using unconfirmed change output. This can be problematic since it can prevent ...
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Re-Installed Bitcoin Core, “Assertion Failed!” on Startup

I have had Bitcoin Core on this computer before, and it worked fine for over a year with no trouble. I had recently uninstalled it, and today attempted to re-install, but, after running setup, on ...
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1answer
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I encountered Signature is found in scriptCode exception when trying to make a BTC transfer

When I transferred a 0.001 BTC from miBEA6o6nZcaLZebR1dsDv4AMHRwJk1mbi to miV1sbmLM9fptRfWD5o8hs5L6ucUeJzmp5, the following error occurred: mandatory-script-verify-flag-failed (Signature is found in ...
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how to add bitcoin-qt icon to gnome dash

I've installed bitcoin core on a machine running Pop!OS (an ubuntu derivative) using the directions on the bitcoin.org website, which includes verifying the file and then running the following ...
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Miner for Non-Standard Transactions

I understand that bitcoin-core introduced the IsStandard() check in v0.9(?) to prevent non-standard transactions from being broadcast (unless in a mined block). I'm interested to know whether there ...
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How can i get BFGMiner to recognise my 1060 gtx?

i have a computer i would like to solo mine bitcoins with, no matter how small my chances are, i am determined to find out my hashrate for mining... i might try litecoin too as i assume it is easier ...
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2answers
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Why do bitcoin: URLs not use “//”, breaking “clickability”?

I want to have something like this in a plaintext e-mail: Pay directly: bitcoin:addresshere?amount=0.001&label=Blablabla&message=Blablabla But if I do that, it won't be "clickable", ...
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Can I restore an additional address of Bitcoin Core

Once in Bitcoin Core I created an address to receive some payments from a faucet. After years I reopened the Bitcoin Core and started to synchronize it. After a while there was a crash, and I decided ...
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How long does it take for an unconfirmed transaction to drop from the mempool? [duplicate]

I have a transaction currently in unconfirmed limbo for 24+ hours. It was from an old 0.15 bitcoin core wallet, and I guess the fee was set too low. The old version of bitcoin-qt does not support ...
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Bitcoin address types and specific prefix [duplicate]

I know that there are 3 major types of address types: Legacy (P2PKH) start with: 1 Compatible (P2SH) start with 3 Native Segwit (Bech32) start with bc1 more inforamtion here: Pros and Cons of each ...
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44 views

Is there an open database to query bitcoin transactions

My goal is to get all addresses with a balance of more than 0.01 BTC. In order to get this data, I have to sync the full bitcoin node but I want to avoid it. Maybe there is any open SQL or MongoDB ...
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1answer
42 views

how to fix mining software make error? bfgminer bitcoin

so i have bfgminer up on a linux machine running fine purring away at 67Mh/s solo mining (geforce gtx460) im attempting to build on a windows 10 machine i have tried msys2 mgwin32 and 64 bit nothing ...
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So I’m kindve confused I have 4.25 btc in BitPay wallet so what’s the difference between a bitcoin worth 33k

Just need to know the difference between the two and what’s the difference between the BitPay wallet and regular bitcoin
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Can I remove the initial bitcoin folder after installing its binaries to /usr/local/bin?

I know this's kinda a noob question, but I really want to be sure I'm not making a mistake. I want to install Bitcoin Core GUI on my Linux by the following steps: Download bitcoin-0.20.1-x86_64-linux-...
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Bitcoin core Recent Transactions seems Empty

I have setup bitcoin core 0.20.1. Everything is set up correctly, I made a transaction on main net - but it is not showing under recent transactions. Though transaction is confirmed on blockchain. ...
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1answer
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Can I use my “chainstate” folder for anything?

I've recently found an old folder called "chainstate" in my PC. Can't remember why I saved it but inside it there's the following files: "000003.log" "CURRENT" "LOCK&...
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1answer
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Bitcoin core v0.20.1 mining, am i doing it right? using “generatetoaddress” [closed]

I am using the official bitcoin core client downloaded from bitcoin.org i have googled this question multiple times finding only virus warning files or forums with links to outdated information and i ...
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1answer
21 views

Is it only out of sheer luck that all my “txid”s are unique? How should I handle multi-vout transactions?

I have created a database table simply copying the information from listsinceblock from Bitcoin Core's API. I have a UNIQUE constraint set to "txid + vout", as I'm supposed to. But when, as ...
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38 views

Opening Bitcoin core wallet. “Freeze”

I recently downloaded a Bitcoin core wallet. I have been using it perfectly fine for a few days. I have the wallet on a portable hard drive with my mac. The wallet syncs up perfectly fine on opening ...
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48 views

New Bitcoin Core installation. Wallet overwritten?

I have a really old wallet which I recall had a tiny fraction of a bitcoin and I just was wondering if it was worth anything. I installed the newest version of bitcoin core in my old directory but I ...
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1answer
13 views

What is the difference between “time” and “timereceived”?

https://bitcoincore.org/en/doc/0.20.0/rpc/wallet/listsinceblock/ : "time" : xxx, (numeric) The transaction time expressed in UNIX epoch time. "timereceived" ...
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2answers
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What exactly is the “vout” field?

This is driving me nuts. Through trial-and-error, asking numerous people and attempting to read endless articles and manuals, I've come to the conclusion that the "transactions" listed by ...
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2answers
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My first bitcoin transaction with core and coldcard

I use coldcard and bitcoin core 0.20.1. I have checked how to do it with HWI at https://github.com/bitcoin-core/HWI/blob/master/docs/bitcoin-core-usage.md. It appears more complex than needed. With ...
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What exactly is the new (?) “to” field in the Bitcoin Core RPC API?

https://bitcoincore.org/en/doc/0.20.0/rpc/wallet/listsinceblock/ "to" : "str" (string) If a comment to is associated with the transaction. I've read that ...
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2answers
134 views

Why does Bitcoin Core mention “Coinbase transactions”, and what are they? [duplicate]

Quote: "category" : "str", (string) The transaction category. "send" Transactions sent. ...
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2answers
44 views

Can anyone use your private key if its encrypted on bitcoin core?

I bought cold storage coins with private keys engraved. After I import and encrypt the wallet in bitcoin core, can just the private keys be used to access the wallet or would you also need the ...
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What is the purpose of the “category” Bitcoin Core RPC API field/property?

When using the Bitcoin Core RPC API to list the transactions, there is a "category" property, which can apparently be either "send" or "receive". Then there's the "...
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Trading volume of Bitcoin

I was trying to see how the trading volume and market cap of Bitcoin are compared to each other. I quickly found https://coinmarketcap.com/ and similar sites which tell the same story: Bitcoin has a ...
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Upgrading Bitcoin Core (from a rather old version) and pruning at the same time? [duplicate]

I have an old Bitcoin Core wallet (v0.15.1) with 500 GB of blockchain on my computer (A new-ish mac - stupidly just copied the same bitcoin core version over when I upgraded my computer rather than ...
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9answers
4k views

Is there logically any way to “live off of Bitcoin interest” without giving up control of your coins?

All my life, I've been told that rich people don't need to spend any of that wealth. Instead, they just have a bank account where they receive a percentage of the total sum on the account every year ...
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51 views

Retrieve Bitcoin from Deleted Mycelium Wallet

Good morning, There have been a few threads about this but none particular to my situation. I have an old Samsung Galaxy S4 that had some Bitcoin on a the Mycelium Wallet app in 2015. Something ...
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1answer
23 views

How to calculate Tapscript sigops budget?

Sigops limits have been changed to budget in Tapscript. BIP341 defines the budget calculation method as follows. The budget equals 50 + the total serialized size in bytes of the transaction input's ...

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