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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1answer
38 views

Can an account define conditional tags to blockchain

Let me try to specify my question with an example: Consider that there are 4 accounts ( AccountA and AccountB and AccountC (Taged as Store) and and AccountD (Taged as Night Club)), and AccountA wants ...
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2answers
927 views

Found old Bitcoin wallet of mine, but has unconfirmed transactions from 2013

I found one of my old wallets.dat from way back, so I loaded it up and see that I had transactions but they never got confirmed. I can't remember if I just never let them run? But how would it be ...
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1answer
1k views

How do I open my RPC console?

Someone just asked me to open the RPC console, as part of debugging something else. How do I do that? I'm using Bitcoin-Qt.
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1answer
1k views

how to use bitcoind jsonrpc for regtest or testnet server in php?

i used bitcoind with jsonrpc service. but i added regtest=1 in bitcoin.conf at .bitcoin folder. used: bitcoin-cli -regtest generate 101 bitcoin-cli -regtest getbalance 50.00000000 but ...
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1answer
492 views

Where are the new smart fee estimate data saved? Can the file be re-used?

Are the data for smart fee estimation (in bitcoin core with version 0.15.0 or larger) saved? Where is it saved, what is the format? Can they be re-used on a different node - so the estimates are ...
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1answer
113 views

How does difficulty is defined for block '55798'?

I know that the formula for calculating the difficulty is below - Difficulty = T (max) / T Where T (max) = 1d00ffff in decimal it is 486604799. As you can see in the above screenshot the difficulty ...
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1answer
382 views

I bought a bitcoin before my client sychronization was finished. Will I get the coin?

I bought a bitcoin before my client synchronization was finished. Will this stop me from getting the coin or will it just come later when the wallet is synchronized?
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0answers
186 views

sendtoaddress not deducting from account

I have two accounts called "hot" and "cold" and have few address and transactions in each of them. I am trying to move some funds between "hot" to "cold" and using sendtoaddress like this bitcoin-...
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1answer
559 views

What is a workaround to fundrawtransaction for watchonly addresses

I have imported watchonly addresses in Bitcoin and trying to createrawtransaction with input watchonly listunspend which has spendable=false, scriptSig=empty. after that, I'm getting an error on ...
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4answers
1k views

Bitcoin qt synchronization problems!

So bought my first Bitcoins the other day (27 & 28/11/13) on localcoins, then transferred them to a MultiBit wallet. No problems. I decided to use a 'safer' wallet, therefore I moved the coins to ...
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1answer
185 views

How transaction becomes confirmed by miners if InputScript has only the Sig

Please help me to understand how bitcoind client verifying TX with Input Script which consist only from the Sig. For example TX 6D5DF6C0D66CFFC25CC1ABA3655952D7B081ED4E9EA3B70FCD964FDBBA01E91E has ...
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1answer
148 views

How happens the serealization the data in the file blkxxxx.dat in the bitcoin

I'm writing a blockchain parser for bitcoin core with C++ and now I want to enrich the data I read with the raw transaction and the previous and next block hashes. I used this library to convert the ...
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2answers
364 views

How much space does a backup of a wallet usually take?

I have a Bitcoin QT v0.8.5-beta wallet (downloaded in 2013) which I will backup before trying to export the private keys to a Electrum wallet. I have found a backup button in the QT wallet, but it ...
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1answer
910 views

Installing bitcoin and bitcoincash on same server

I have installed bitcoin core by using its source code in my amazon server by using the instructions given in the below youtube link https://www.youtube.com/watch?v=tG_24G7bj_w Some portion of the ...
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2answers
57 views

how do you transfer your Bitcoin core wallet while syncing?

I would like to transfer my btc wallet to an electrum wallet. Syncing is taking to long.
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126 views

rewriting past transactions in Bitcoin [duplicate]

Is it possible to rewrite past transactions in Bitcoin? For example, lets say, we have a super computer with any desirable speed, that would be able to calculate hash as fast as we want. Would it be ...
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1answer
268 views

How to add support for segwit address and legacy with bitcoin core 0.16?

I've been running bitcoin core 0.15 as regtest, and had X bitcoin in my balance all are from legacy output addresses, As I upgraded to 0.16 core version check in debug the legacy addresses are still ...
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2answers
44 views

What role has bitcoin-init as a process?

I have set up a node on a RaspberryPi. When I check for active processes with top I see bitcoin-init occupying 50% of memory and 7% of CPU. I can check for bitcoind and it is active: bitcoin@...
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2answers
409 views

Adding new files to Makefile.am

I need some help with adding files to the code base by adding them to the autotools build system. Other posts that try to answer the same question haven't helped me. I am experimenting with Bitcoin's ...
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1answer
54 views

How to convert fee_estimates.dat into a human-readable format?

I would like to take a look inside fee_estimates.dat to understand a bit better how the RPC command estimatesmartfee works. However, when I open the file in a text editor, the content is not readable. ...
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1answer
324 views

Can somebody show me a working gettxoutproof / verifytxoutproof pair?

Can somebody please show me a working gettxoutproof / verifytxoutproof pair, I am looking for the input used on bitcoin-cli or console window in Bitcoin Core to make this happen, and the outputs. For ...
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1answer
48 views

Batching transactions to safe on fees

I have some bitcoin spread across multiple addresses. I would like to move these to different addresses. I've heard about batching and was wondering if it is possible to batch the transaction to ...
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1answer
63 views

Are minimal bitcoin fees nowadays enforced in bitcoin-core?

I read some resources like http://bitcoinfees.com/ and Are Bitcoin fees optional?, and I still don't get this: Does bitcoin-core nowadays enforce (regulates) minimal bitcoin fee or is it completely ...
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2answers
339 views

Private key security level

Any of a kind Bitcoin wallet need to share private key on the internet-connected machine. Bitcoin client has no responsibility for to keep private key secure. If your's machine connected to the ...
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0answers
84 views

Create a multi user web wallet using bitcoind RPC call

I just a beginner in bitcoin technology.I planning to create a multi user bitcoin web wallet using a VPS full node setup(Not use minig). I read the RPC documentation and found something for archiving ...
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2answers
94 views

Lightning - Question about force-closures of channels and its impact on recovering funds

Dear Lightning experts, someone mentioned in context with lightning channels the following things, and I would like to ask you if this statements are true, and if yes, is this a problem in a future ...
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1answer
74 views

Using importmulti with internal set to true does not add any change keys. What am I doing wrong?

First I call: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "createwallet", "params":["ColdWallet", true] }' -H 'content-type: text/plain;' http://user:password@127.0.0.1:18332/ ...
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1answer
163 views

Is it possible to get already-sent bitcoins from a corrupted wallet?

I bought some bitcoins on LocalBitcoins then downloaded Bitcoin-qt then instantly sent it to my wallet and now the wallet is corrupted... Is there a way to get them back?
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0answers
179 views

Recovering wallet after formatting SSD

I am not exactly sure what I need to do and I do not want to accidentally overwrite my disk. I may have already done so. After searching my web history I have found the BTC address that my BTC is on ...
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4answers
1k views

Monitor non-wallet bitcoin addresses for new transactions

This is usual checkout functionality. Show address to the user and needs to monitor it for new transaction during n minutes. Addresses are not unique for each payment. Optional:it would be good to ...
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1answer
395 views

How to import an extended public key into bitcoin core 0.16

I exported an xpub key from a HW wallet and want to import it into my own node to keep track of changes to the balance. My node is running satoshi 0.16.1 Can someone help me find the right syntax for ...
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1answer
473 views

need advice for Python interaction with bitcoin-core wallet

I've read about a few Python libraries that performs JSON-RPC calls to bitcoind. However, not many are actively developed/maintained, nor are they widely used in production environment. Since bitcoind ...
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1answer
167 views

Are the original Bitcoin Qt client's developers around and can we ask them to consider a portable version? [duplicate]

Possible Duplicate: How to Make Bitcoin QT Client Portable? (Windows) That is my conclusion. It's better to experiment for myself that asking all these questions I have to restrict myself to ...

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