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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 ...

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bitcore signature authentication similar to trezor connect

I'm trying to implement an authentication process similar trezor connect but i'm unsure what i'm doing wrong. I'm trying to validate the signature using the official implementation here: https://...
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12 views

I have Turkmenistan manat and I want to exchange it for usd

I have a turkmenistan manat on my bank account. UNfortunatelly, that bank doesn't give me a credit card for it. THey just opened an account and put my turkmenistan manat on there. What should I do to ...
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1answer
19 views

gettransaction cannot get address where it send from

Hi i have test few time with gettransaction method, it seem only show full detail about transaction when send inside node. But if i send from another address outside my node, gettransaction only show ...
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8 views

Bitcoin windows build error: ceil not a member of std::

I am using these bitcoin build notes to build a QT wallet for windows using Ubuntu 16.04 subsystem for windows. At the final step when I use sudo make I receive the error: chainparams.cpp:92:57: ...
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1answer
25 views

How to retrieve transactions in realtime from bitcoind .dat files

I want to get all the data from blocks as they get updated on my local node. Abe offers very poor performance, and fast-dat-parser creates other .dat files and doesn't have enough documentation for me ...
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1answer
12 views

Watch only address not update balance

After adding watch only address to my bitcoin core and perform some transaction that make my watch only address balance to 0, but when i run getbalance and listaccount with watch only is true, my ...
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19 views

How to use this nodejs script (by:Raghav Sood) that have been posted on the stackexchange

I'm new to javascript I'm trying to use this script from this post (made by Raghav Sood) : Bruteforce bitcoin address - I know the words + public address but not the order var bip39 = require('bip39'...
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UTXO are not being listed while they have conf over 100 (btcd + simnet)

I am using BTCD and while in Simnet, I generated 104 block (Best block : 104) But when I listed utxos, transaction from block 3 and 4 (which have 102 and 101 confirmations) don't be listed. So balance ...
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1answer
38 views

Where is the New button in the Receiving Addresses windows of bitcoin core 0.17.0?

I'm not imaging this right - the New button in Receiving Addresses of bitcore core has just disappeared in 0.17.0?
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1answer
30 views

blockexplorer is not fully synced

I am working with a cryptocurrency which is a fork of bitcoin. In my blockexplorer it shows 91% synced and I cant see any latest blocks.
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1answer
29 views

How much should I spend when I send BitCoin to other people using electrum wallet?

The fee displays "Target: Within 10 blocks, Current rate: 2.5 sat/byte" when I use electrum wallet to send BitCoin to other people. I can't understand completely the means of "Target: Within 10 ...
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Create transaction with bitcoin core

Currently i'm working with bitcoin-qt for a while and now i have some issue that i wanna ask. -Is there a way to create transaction then submit it to network from wallet that NOT inside this bitcoin ...
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Blocks are not generating as per given block time and difficulty change time

I've tried to create own AltCoin from litecoin source and I''ve made changes in block generation time. consensus.nPowTargetTimespan = 24 * 60 * 60; consensus.nPowTargetSpacing = 1 * 60; consensus....
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1answer
46 views

Bitcoin core gives wrong previous Tx

I run my own bitcoin core node: MacOS version v0.16.3 (64-bit) I want to analyse tx: 3170cd6c0d49c1c851d640547b5533b62e40071c376feeb83a0a40bce5195802 The first input (key ...
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0answers
12 views

Want to get multiple coin price at once

Any one know how to i get multiple coin price using any api at once. Suppose i have 5 coins and want to fetch only 5 coin current price. Any API suggestion to achieve this ?
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Failing to create a new address to be used for receiving staking rewards whenever a generated block is accepted

Our problem is that we need to get a new address on each stake. What I've tried so far is: Generating a new address right before a block is accepted and try using it to receive the stakes, but that ...
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1answer
27 views

How can I simulate ProofOfStake (PoS) for a testnet (clone of Pivx)?

After the end of PoW blocks, I am unable to mine using PoS. Here is my setup. 1) Server with the following config file. server=1 daemon=1 listen=1 rpcuser=user rpcpassword=password 2) Two clients ...
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1answer
27 views

Changed address

My address has changed but I'm showing 0.00mbtc. when I lookup the information on Blockchain it confirms 0.00 but then States the address has yet to be used on the network. I'm confused, please help.
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1answer
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One more question about scripting

Is it possible to write a script that would allow withdrawal of money only to a specific address? Is it possible to write a script that would allow withdrawal only specific amount? Any examples ? ...
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1answer
28 views

Bitcoin core's estimatesmartfee error “Insufficient data or no feerate found” with synced node

I'm running bitcoin core version 0.17.0 on the Testnet and since yesterday, I've been experiencing problems with the RPC estimatesmartfee. I'm getting as a response: "errors": "Insufficient data ...
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0answers
13 views

Bitcoin core read-only

I have system where users can generate addresses and bring some coins, and get bonuses after. I want to make my core read-only. For this I have a second bitcoin core which have not connected to ...
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1answer
35 views

How can someone get my private data (such as email, name, IP …) from bitcoin transaction?

I am curious about privacy of bitcoin transactions. I heard that if you are good enough at hacking, you can get private data from bitcoin transaction, or associate someone to transaction. How is it ...
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1answer
39 views

Can I, and should I, verify bitcoin core source code before compiling it?

If I use bitcoin core binary release I can verify them with the gpg keys of the core developers. Is there a similar process for the source code? A follow-up question: Is it preferable to use signed ...
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25 views

Blockchain testnet Websocket

Please, how do I subscribe to blockchain testnet web-socket for an address. I seem to find that for livenet, any help?
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0answers
22 views

Bitcoinj Spend from a address directly without wallet

I am stuck trying to send coins from arbitary privateKey in bitcoinj. How can I make the following function work without using the Kit or Wallet classes? @Override public String transferCoin( ECKey ...
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2answers
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Can not able to install Bitcoin Core on my MacOS High Sierra

I'm trying to install Bitcoin Core on my MacOS High Sierra. But, I'm repeatedly getting this error - The document "Bitcoin-Core" could not be opened. Finder cannot open files in the "volume" format. ...
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Even with dbcache=7000 and 16 core processor. Why does -reindex-chainstate take more than 24+ hours?

My computer got shut off due to a power outage and when I rebooted my bitcoin core it was stuck on connecting to peers. I was told to do a -reindex-chainstate with dbcache set as high as possible. ...
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1answer
26 views

Transaction Malleability, if i want to change signature, what part should I change, so that it would remain valid?

I know what transaction malleability is, but I don't understand how someone can change my signature so that it would remain valid. For example, If I want to change signature what part should I change, ...
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21 views

Bitcoin address switched and delay receiving money [duplicate]

I sent bitcoins to my Electrum wallet but they have not been shown after 12 hours. Why the delay? Now I see that my Electrum wallet has switched address on receiving the figs, does it matter?
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0answers
17 views

Label Sent Bitcoin Transaction [duplicate]

Is it possible to add a label to a sent bitcoin transaction using the bitcoin-cli?
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2answers
37 views

Bitcoin core incorrect balance?

So I have ubuntu 16x running bitcoin core. Its a full node and fully synched. Run with bitcoind --daemon as suggested. Using a particular address from my wallet, whenever I send money to the address ...
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1answer
44 views

Transaction Malleability, How can I change signature?

I'm kind of desperate as I can't follow some ideas that I don't understand. I hope you can help me. Thank you in advance It's all about Segwit Question 1) It says that when bob makes a transaction ...
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1answer
34 views

How to send bitcoin programatically using API? Bitcoin Transaction. (Without Setting Node) [closed]

Want to send BTC from one address to another address without using JSON-RPC. Followed and used: https://bitcore.io/api/ https://www.npmjs.com/package/bitcoin-transaction/v/1.1.1 2nd:bitcoin-...
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2answers
32 views

Adding Comment on Bitcoin Transaction (After Sent)

Is it possible to add a comment to a bitcoin transaction after it has been sent?
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0answers
13 views

Moving 'Sent' Transaction from Default Account

I would like to move a sent transaction from the default account to another account held on the same wallet. I am using version 0.16 so I still have the depreciated accounts functionality. I'm not ...
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1answer
16 views

Why is there an addrlocal field in the output of the RPC call getPeerInfo, and how SPVs handle it?

According to the Bitcoin core developer reference, the RPC call getPeerInfo has in its output a field called "addrlocal" which holds our IP from the worldview of the peer. Why is this output there? ...
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0answers
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What is the optimal Bitcoin Core 0.16.3 settings in bitcoin.conf settings for running a full node with a very beefy system?

Is there an optimal bitcoin.conf setting file I should use when running a bitcoin core full node? I have a very beefy system with 16 core processor, 32gb ram, and nvme hard drive. I wan't to be able ...
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0answers
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Estimated number of hashes

This is not a duplicate of previous, similar questions I've read on StackExchange, since none of those questions, nor the answers, go into the difficulty theory, as espoused on the Bitcoin Wiki. ...
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1answer
143 views

Cannot mine Genesis / First Block (PIVX Fork / Clone)

Whatever I do, I am unable to mine the 1st block after the genesis block. All the while, I have assumed that I have mined the Genesis block, and I am unable to mine the 1st block using "setgenerate ...
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27 views

Why my altcoin only generate wrong key (only with prefix 3)

I created and run an altcoin blockchain. It's seems everything is good besides all the keys produced by the blockchain are with prefix 3 (seems like all are p2sh). I have tried the past two weeks to ...
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It's October 2018. ./bitcoin-qt -reindex-chainstate takes forever. Is there a way to speed this up?

Current version: Bitcoin Core 0.16.3 I think I have a corrupted blockchain download as my VM box was shut down in the middle of syncing. Which is why I'm doing a -reindex-chainstate I have the ...
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2answers
30 views

Bitcoin MultiSig balance not showing under listaccounts

I added 2-2 MultiSig address into wallet via bitcoin cli (Testnet) addmultisigaddress <'["key","key"]'> [account] 1 key of current wallet and other public key from different node wallet. ...
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0answers
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How to reduce Bitcoin blockchain volume on server [duplicate]

Is it possible to reduce bitcoin blockchain volume with pruning option
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1answer
43 views

How do I calculate the witness commitment hash for a given block?

From my understanding, every SegWit enabled block has an added output script which is used as a place to store the "Witness commitment" specified in BIP 141. One issue I've stumbled upon was ...
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1answer
30 views

can I run bitcoin core with public key only

I'm looking a way for secure setup of web site that accepts bitcoin payments. Ideally I'd like to create wallet off-site and be able to deploy bitcoin core online with public key only that I believe ...
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0answers
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Conf file is unresponsive/nonexisting [closed]

The file says it has no content(47 bytes to be specific) and there's no way to open and edit it. Anyone what I'm doing wrong. Mac operator*
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1answer
17 views

Can not indentify accounts

I am trying to get balance of accounts and when running bitcoin-cli listaccounts I am getting the data look like this { "":0.81234545 } I wanted to know what is the "" and 0.81234545 and where my ...
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0answers
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Paying to one address using inputs from multiple addresses under same seed

I am using bitcoin core and I was wondering. If I make a bitcoin payment using bitcoin-cli which has about 50 addresses registered to it. If the payment is for 1 BTC and I pay from the address A1 (let'...
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1answer
25 views

RPC Command to send from multiple accounts to one account (default - “”) in same wallet

I have small amounts in multiple accounts in the same wallet. I want to send all of them to default account (usually named as ""). Is their any RPC command available for this scenario? Thanks in ...
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1answer
159 views

Solving Bitcoin core's 'ActivateBestChain failed'

I'm running bitcoin core version 0.16.2 on the Testnet and realized that it had stopped receving blocks after the 1414433. I tried running bitcoin core with options -reindex and -reindex-chainstate ...