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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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1answer
42 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
31 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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0answers
24 views

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 ...
2
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1answer
88 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
34 views

blockexplorer is not fully synced [closed]

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
34 views

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

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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1answer
41 views

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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0answers
37 views

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....
2
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1answer
58 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
17 views

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
73 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
58 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
19 views

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 ? ...
1
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1answer
67 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
17 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
39 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 ...
2
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1answer
52 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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0answers
67 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
27 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 ...
2
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2answers
61 views

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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0answers
27 views

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. ...
1
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1answer
35 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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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
84 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
58 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
49 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
38 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
17 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
21 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? ...
2
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1answer
68 views

What is the optimal Bitcoin Core 0.17 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
59 views

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
512 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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0answers
38 views

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
43 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. ...
2
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1answer
69 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
35 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
18 views

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
32 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
16 views

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'...
1
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1answer
65 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 ...
3
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1answer
249 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 ...
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0answers
45 views

How can i get in touch with a miner [closed]

Please can someone help me get in touch with a miner, i am trying to recover my bch sent to a segwit btc address.
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0answers
38 views

Looking for old bitcoin [duplicate]

I briefly ran a node on my Mac in mid to late 2012/early 2013, but didn't understand it at the time and let it go. Is it possible that I still have bitcoin on my computer from that installation, if so,...
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2answers
40 views

How exchanges generate transactions for all cryptocurrencies and send it to their network nodes?

This is an important question for me, I know some Bitcoin wallets like blockchain.info are a Full Node, but exchanges which support so many coins, how do they create transactions per cryptocurrency? ...
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1answer
54 views

How is Merkle path derived or calculated? [duplicate]

How is Merkle path calculated? I am looking for a detailed algorithm rather than a quick one liner for this so I can implement it. Note that this is not the same as computing Merkle root or building ...
1
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1answer
40 views

Bitcoin protocol allows a chain to be undone by a longer chain

In Mastering Bitcoin, page 196, it says "While the protocol always allows a chain to be undone by a longer chain and while the possibility of any block being reversed always exists, the probability of ...
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1answer
31 views

git checkout v0.16.3 gives error

Trying to update my bitcoin core installation on raspberry pi with git checkout and it's giving the error "error: pathspec 'v0.16.3' did not match any file(s) known to git." Any recommendations?
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1answer
36 views

What applications of clients use bitcoin JSON-RPC?

As far as I understood, the Bitcoin JSON-RPC is one of the ways (if not the only way) in which applications can be built that can access the bitcoin wallet. So, the RPC server here gives that access ...
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1answer
27 views

Manually create a transaction to spend the output of a P2SH tx

I want to manually create a transaction to spend the output of a P2SH tx, but I don't know where the redeem script should be placed in the new transaction? I followed an online tutorial Building a ...
1
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1answer
70 views

Unusual Version Number in Blocks

I've noticed recently that some blocks contain version numbers that are not the traditional 0x10000000 or 0x20000000. For example, this block, has a version number of 0x3FFFE000 instead of 0x20000000 ...