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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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Does P2SH unlocking script only consist of operants?

I have a question about the P2SH unlocking script. Can I put common operants and operators in the P2SH unlocking script? And if yes, how can I create such script? e.g. unlocing script: <sig1> &...
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2answers
99 views

How to display a list of incoming bitcoin Transaction history in my own wallet?

I have gone through various references including How to get a history of incoming and outgoing transactions for a certain address? Fetch list of transaction where i have received the bitcoin? I am ...
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1answer
112 views

how to get block information using node js

I have used bitcoin-core package in node js to get the information about the block detail using rpc command. For example: var Client = require('bitcoin-core'); const client = new Client({ headers:'...
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1answer
59 views

How do I set 'txindex = 1' in bitcoincore?

How do I set 'txindex = 1' in bitcoincore? I installed it on linux ubuntu. I can not find the /home/bitcoin/bitcoin.conf file. Path to '/home/bitcoin/share/examples/bitcoin.conf'The bitcoin. conf ...
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1answer
50 views

Can a live feed of blockchain transactions be obtained from using bitcoin core wallet?

I am interested in both obtaining the entire blockchain transaction history data (for bitcoin) and a live feed of transactions for a data science project. BlockChain.com has a very useful websocket ...
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1answer
23 views

Withdrawal transaction made 8 hours ago still has not had any confirmations [duplicate]

I made a deposit into a bitcoin exchange on 2018-09-11 06:57:41. The exchange then made a withdrawal transaction on 2018-09-11 13:19. The time is now 2018-09-11 21:55 but the transaction still has ...
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1answer
39 views

What does output mean

Will my bitcoin be there after syncronising Am trying to sweep from my syncronising bitcoin core using my private key but its showing no output whats going on
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109 views

Bitcoin core RPC FEE

I want to use BitcoinCore for the RPC requests from the site. But I could not find anywhere else how to ask a commission for withdrawal. In the instruction there is only: sendtoaddress: ...
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2answers
38 views

How to differentiate between mining node and non mining node in bitcoin

I am trying to understand how does mining traffic looks from non mining ones? If I try to discover mining node I believe I can look for nodes which broadcast blocks. Is there someway to know which ...
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2answers
45 views

How to confirm that given bitcoin address is generated by given public key?

I have 10s of private and public keys associated with 10s of different addresses. Now I have a test-net btc address "mfoxBS2TpoiUWrEV3sZopoEB6Pi2d7TE9N". What operations can I perform to find the ...
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1answer
42 views

How long for Bitcoin core to initially synchronise? [closed]

Now i tried sweeping with my private key but its says needed to confirm output no output
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30 views

Best configuration to use for optimization of JSON-RPC calls?

I have been working with a bitcoin full node trying to implement a personal blockchain explorer using RPC API calls to populate an external database. The script I am using iterates through each block ...
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2answers
41 views

How to monitor balance for addresses other than by using importAddress?

Is there any way, other than importaddress, to watch balances of specific addresses? If not, how it is possible for wallets and explorers to give information (balance, transactions) about specific ...
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1answer
94 views

Differentiating Output Script (scriptPubKey) Types

I am working on a little script to breakdown the data inside coinbase transactions. This is largely to improve my understanding of legacy and SegWit transactions (Given coinbase transactions have less ...
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0answers
29 views

Transfer wallet coins without syncing [duplicate]

I have not synced my wallet in 2 years and I would like to cash out my coins without syncing for 2 weeks or more. I do have wallet backup. Is it possible to use backup wallet somewhere online so my ...
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1answer
43 views

Testing Bitcoin Core source code? [closed]

What's the recommended way to start testing the Bitcoin Core source code. Thanks in advance, Jim
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1answer
98 views

How to convert script hash to base58 address?

For example : take a look at this 37d1d453311ea5682cdb31468826178db15fa731722a5dbb09525ea901f1c41c scripthash. I need help converting it to base58 address. Thank you.
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1answer
46 views

How to extract addresses from input in raw transaction

I need help to get input addresses from "vin" in offline mode. I don't know how https://live.blockcypher.com/btc/decodetx/ is doing it. Example raw transaction: txn id : ...
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3answers
60 views

Could bitcoin/blockchain be used to create a secure non-3rd party escrow?

I'm wondering if there could be a block chain approach to selling goods and putting money in an escrow-like state until the goods are received. I'm envisioning the following scenario. 1) Buyer puts ...
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1answer
138 views

Why does Bitcoin block 526,591 have a 6.25 (instead of 12.5) block reward?

https://chain.so/block/BTC/0000000000000000002ba5a1fb96f93e6c215d62db4280f1cbd30e82c7c71fba https://blockchair.com/bitcoin/block/526591 It's an empty block (zero transactions), but the coinbase ...
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0answers
141 views

Error code -28: loading block index (Raspberry pi)

I'm new here and searched everywhere but couldn't find an answer on my question. I want to set up my Raspberry PI fullnode for LND lightning. But it keeps giving me this error: admin@P2P:~ $ ...
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1answer
63 views

what is the Difference between ./bitcoind and $ ./bitcoind -daemon?

I was trying to interact with bitcoin network with JSON RPC commands, So I referred to the bitcoin wiki page https://en.bitcoin.it/wiki/API_reference_(JSON-RPC)#Java it shows to run the bitcoin using '...
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2answers
44 views

Mining Bitcoins on PC - Experiment, looking for advice or simple instructions [closed]

I am absolutely new to Bitcoin and mining, I know that mining at home using a PC is not worth even the time and takes years to get any income out of it. The thing is I need to mine at home using a PC ...
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1answer
140 views

sent BCH to a BTC Segwit address [duplicate]

Is there a way to recover the BCH ? Use his Ledger purse I've sent BCH To address BTC Segwit This link is treated https://explorer.bitcoin.com/bch/address/36CU6nDniJca1UVhvNhjsDdZpUsyYw5vSx I want ...
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1answer
31 views

Bitcoin explorers don't show my addresses transactions

I'm creating bitcoin addresses for a wallet we're building. To make sure the addresses are valid I went to a couple of bitcoin explorers and they reported, correctly, that the address does not have ...
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1answer
12 views

Go to the previous wallet address

The computer reinstalled the system, and then downloaded the bitcoin core again. I forgot my wallet, and then the exchange transferred the previous wallet address. Can I still retrieve it?
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89 views

Variables in Coinbase Transaction & Decoding I/O Scripts

I just have a few questions to help better my understanding of the coinbase transaction. Example: ...
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1answer
27 views

Does all miners in mining pool increase the nonce variable one by one starting from zero?

Let us consider we have n miners in our mining pool. Now the manager of the pool verified the transactions and packed into a block to be mined. Then it passed the block to all n miners in the pool. ...
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1answer
186 views

bitcoin rpc api createrawtransaction with python returns -3: Expected type array, got object

experimenting with JSON RPC API using bitcoinrpc.authproxy for python. so far it works in all instances accept when i try to create a raw transaction. somewhere along the way im passing parameters in ...
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1answer
17 views

Lightning Network: can I create a channel from a preexisting channel?

If I open a channel with myself for 0.01 BTC, with one end having all, and the other having none, could I create an updated contract, or state, to send 0.001 BTC to an address owned by Alice, even ...
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1answer
37 views

What happens if I use same k twice in DSA algorithm?

To sign a message , we choose nonce k but what happens if we use same k twice to sign a message using DSA algorithm?
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0answers
13 views

how do i change my bitcoin cleint application?

I recently downloaded the bitcoin (--testnet) blockchain data using Bitcore(I thought it was the Orginal client) for some development purpose. but now, I like to move to bitcoin core client. Should I ...
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2answers
34 views

address format is different from bitcoin core response from btcd

For now, I'm generating WIF and address using golang btcutil package programmatically. wif, err := btcutil.NewWIF(privateKey, conf, false) if err != nil { return nil, err } ...
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16 views

How to make sure importprivkey command worked after running

As title, I'd like to know how to make sure that importprivkey command worked after running. What is understandable way? Thanks in advance.
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0answers
42 views

How to flush bitcoind cache?

I have been working with a bitcoin full node trying to implement a personal blockchain explorer using RPC API calls to populate an external database. After trying to gather some statistics on RPC ...
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1answer
48 views

Access funds on legacy address related to segwit address from which I have private key

The situation Hello. Our company running BTC pool. We've been mining BTC for a while and used segwit address 32Z3eXSPgxcHj2fnQy8d6dg66eVtZfxrBM as pool adress. But when we finally found a first ...
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1answer
138 views

sendrawtransaction and txn-mempool-conflict

When i sendrawtransaction to bitcoind, i get error (exceptions) 18: txn-mempool-conflict (use Bitcoin JSON-RPC denpamusic/php-bitcoinrpc) But the transaction is sent to the network and is subsequently ...
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1answer
37 views

Can Bitcoin Tech be Used to Protect Journalists [closed]

Over eight Nigerian journalists are currently in police detention because they published investigative news stories that didn't sit well with the government of the day. How can the bitcoin ...
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23 views

Bitcoin Tools for 'testers'

I am writing a Bitcoin application and want to give my testers the opportunity to see what is going on on the blockchain. The plan is to test the application mainly on a local Regtest network. I did ...
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1answer
47 views

Can't generate same addresses as bitcoincore using xprv from bitcoin-core

First of all all addresses below are for testing purposes so I don't care about private keys. So dumped wallet created by Bitcoin-qt v0.16.2: extended private masterkey: ...
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1answer
21 views

How can I get whole info about tranasaction whose outputs are spent?

I use RPC method getrawtransaction to get whole info about transaction. But if I rigth understood It works only for transaction whose contains at least one unspent output. How can I get whole info ...
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0answers
62 views

Unable to get balance with bitcore lib

Using latest version of bitcore lib , want to check balance for making tx but once I include var explorers =require('bitcore-explorers'); after var bitcore =require('bitcore-lib'); Error: More ...
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1answer
35 views

free up space by deleting blocks

I've run into an issue where a bitcoin partition reached 100%. I created a new partition and try to move the whole Bitcoin directory over, but I seem to be handicapped by "no space left on device" ...
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2answers
123 views

running live and test node simultaneously

it took me 4 days to fully synchronize my node, but its finally running and i can create wallets etc.. I wanted to experiment with some transactions on testnet, so need to either change my config or ...
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1answer
23 views

Help me resolve few queries about bitcoin network ( regarding validation, mining and state of transactions…)

Q1. Suppose I make a transaction from node A to node B, it is gets validated by the nodes in the network, A new block hasn’t been mined yet, in the meantime miner is stashing up the transactions Miner ...
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1answer
28 views

VPS with 80 GB Space, can't download the whole blockchain?

I am using an application and WordPress that allows people to pay with Bitcoin in a small multi vendor marketplace for trading hobby items. The plugin that I'm using is recommending that I run a ...
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1answer
129 views

how to enable wallet in a confirmed node

I installed/compiled my Bitcoin Core RPC client version v0.16.2.0 and i used --disable-wallet flag. I think this is the reason I am seeing "Method not found" errors when trying to GetNewAddress how ...
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1answer
27 views

How to make data inside blockchain immutable [closed]

I want to do simple blockchain implementation on golang, i have mongodb database with user info (Name, cardID, etc.) i want to store several information inside blockchain, and to put it inside another ...
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Wallet need help

Bitcoin wallet I found my old wallet it was written over by one of my nephews video games I had the bitcoin client wallet anyway had 50 bitcoins I also mined some had to restore the wallet I haven't ...
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3answers
55 views

If I invest £2,000 in bitcoin and the price goes down, can I lose more than my investment. Could i Have to sell my house to pay back the losses?

If I invest in Bitcoin is it possible to lose more than my initial investment ? In other words if the price goes down substantially, to well below that of when I initially invested; is it possible ...