Bitcoin Core is an MIT-licenced Qt 4 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client".

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error durring the bitcoincore installation

I want to use python-OP_RETURN library. For this I need to install bitcoin core. But when I exceute this command sudo apt-get update I have this error : Err http://ppa.launchpad.net jessie/main ...
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bitcoin core question transaction not received [duplicate]

hi i download bitcoin core wallet at my home pc and than i send the receive address which generate by bitcoin core wallet to the merchant and than merchant send the transaction at that address but ...
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38 views

Coin selection algorithm in Python to optimally select UTXO

Does anyone know of a good coin selection algorithm in Python that's perhaps similar to the one in Bitcoin Core (currently this: github/bitcoin/src/wallet.cpp (per guidance from stackexchange/1077))? ...
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14 views

Install bitcoin core on debian jessie error

I have to install bitcoin core to use op_return library. But I have difficulties to install correctly bitcoin core. First I run the command :sudo apt-add-repository ppa:bitcoin/bitcoin Second I ...
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20 views

Bitcoin Core v0.12.1 wallet. Steps to diagnose “No block source available”?

I know that there are other similar questions, but I have been unable to understand and apply there answers sufficiently to the issue I am having. My client Bitcoin Core v0.12.1 running on Windows ...
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40 views

Sent Bitcoin to Bitcoin Core Wallet before it finished “syncing with network”

So I bought some bitcoins and sent it to my Bitcoin core wallet before it finished syncing with network, will the transactions come through once it finishing syncing or have I lost them?
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29 views

Configuring Windows Bitcoin Core Wallet for use on Tor

I use Bitcoin Core v0.12.1 (64bit) for Windows as my desktop wallet for transactions on the regular web. I am just getting set up to use Tor. I would like to configure Bitcoin Core for use on Tor as ...
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14 views

Is it possible to perform split payment in bitpay

Hi all coming to the question am using bitpay payment in my project..Is there any possible to perform split payment using bitpay For example am performing bitpay payment for 100 usd for one wallet ...
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24 views

CLI: Generate a new private key, unrelated to any existing wallet

I have a wallet on an offline computer, which has too many backups on connected computers. I would like to generate a totally new bitcoin address on the offline computer, and use it as a cold ...
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24 views

Incorrect balance after upgrading from Core 0.8.3 to 0.12.1, even after syncing with network

I've just upgraded to version 0.12.1 after working with 0.8.3 for ~3 years and I'm getting about 1.5BTC lower than what it should be, even after network synchronization has completed. It's the same ...
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27 views

Regrouping accounts belonging to same user

I am analysing some BTC transactions for academic purposes. As part of that work, I would like to identify users with several accounts and regroup them under a single identifier. I have assumed that ...
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1answer
62 views

How to get transaction with Bitcoin Core?

I've have a fully tx index node in v.11 and I can do the following below just fine, bitcoin-cli getrawtransaction c6556ca7e143d108f5ef594057ff83a78bceb4b5fdc565ae160b4783cddad00f but with a fully ...
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2answers
43 views

Recover bitcoins?

I was using MultiBit HD and it was working fine till somehow my kaspers key start to delete it. Then i installed Bitcoin Core without knowing anything about it. and it started to downloading bitcoin ...
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35 views

Transaction code that will create a customer invoice and process a sendmany

I am looking for transaction code that will have multiple output, including an opreturn that I can send to a customer as an invoice who signs the transaction. In other words, I want to create a ...
3
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46 views

Bitcoin core: boostrap.dat trade-off with “Synchronizing with network…”

Being, now, aware that users of Bitcoin Core (v0.12.1.0-g9779e1e) are no longer to use a torrent download of a bootstrap.dat and, instead, are admonished to simply launch Bitcoin Core and permit "...
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29 views

I tried to run bitcoin core and it is gone. Has anyone experienced this?

I tried to run bitcoin core and it is gone.The folder is still there, but the exe is not there. Does that mean the local wallet is gone as well?
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39 views

is there a way to run bitcoin-qt and point it to a local testnet?

I'm running a small testnet locally with this project: http://github.com/freewil/bitcoin-testnet-box but I'm having trouble pointing bitcoin-qt to the blockchain that I created locally myself, so I ...
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Question on interpreter.cpp in Bitcoin core - set_success method

https://github.com/bitcoin/bitcoin/blob/master/src/script/interpreter.cpp Line 22 => Where is declare "ScriptError" ? What does the "*" mean ? "inline bool set_success(ScriptError* ret)"...
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Can*t call chainActive.Tip()->nHeight in core.cpp

i want to call chainActive.Tip()->nHeight in core.cpp. It is but not possible. I am happy for every idea. https://github.com/LIMXTEC/BitSend/blob/DEV-joshafest/src/core.cpp Here is a example bool ...
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Bitcoin transaction unconfirmed for several days even though transaction fee was included [duplicate]

Sorry, Bitcoin n00b here. Just wondering why this transaction is unconfirmed (has been about three days now) https://blockchain.info/tx/...
5
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1answer
59 views

Stop bitcoin-qt from retrying transaction

I sent some bitcoins, forgot to uncheck "no-fee" checkbox. The transaction started, but never got confirmed. In the blockchain after some time it was "purged". I expected my bitcoins back, however, ...
4
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1answer
112 views

What would be the Internet Usage For 100 Antminer S7?

I am planing to set up a mini farm with 100 S7 Miners, but am little concerned about the internet usage and speed. What speed do I need and how much bandwidth it will consume per month?
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C++ Proofofworklimit to bitcoinj util.DecodeCompactBits

What is equivalent bitcoinj util.DecodeCompactBits for below c++. Cbignum(~uint256(0) >>32) Cbignum(~uint256(0) >>20) Cbignum(~uint256(0) >>23) Cbignum(~uint256(0) >>22)
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1answer
92 views

Can we unravel Bitcoin Core?

Is there a documentation somewhere to understand the C++ code of Bitcoin Core (available on Github) "from a to z" and being able to recreate it ?
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102 views

Add dependency Bitcoin Core

I'm trying to add a new dependency to my Bitcoin Core fork. The dependency is Rapidcheck, a property based testing framework. I've added a file called rapidcheck.mk inside of depends/packages with ...
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Sent transaction from Bitcoin Core to electrum But not showing up in electrum or Block chain?

i sent money from bitcoin core to electrum as i didnt realise when lodging the money to bitcoin core that i needed to store whole blockchain in lapto which was very frustrating so i decided to ...
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223 views

How do you apply “-zapwallettxes” on Windows?

On May 27 I tried to sell some Bitcoins(for the first time). Since that day the transaction is in the status "unconfirmed". The amount is booked from my wallet, but isn't booked to my bank account. ...
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145 views

Can I retrieve my bitcoins from years ago that I never received?

How can I get hold of my bitcoins that never made it to my wallet years ago? I purchased some bitcoins years ago (have got my receipt and all emails from who I purchased). I downloaded Bitcoin-Qt 7, ...
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1answer
34 views

Issues Still With Import Backup dat.file

My computer has Windows 7 professional operating system. I have my Wallet now synced as up-to-date. I followed instructions from earlier post as follows: Then you have to localize your Bitcoin ...
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2answers
39 views

What happens if the transaction interrupted during proof of stake?

Suppose I've few coins for proof of stake, and suddenly my internet connection goes off or power down of my pc, what may happen if a transaction was in the middle, would I lose my coins which were in ...
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98 views

How much bitcoin can be mined with intel core i5 pc with external graphic card? [duplicate]

I know ant miner is required to earn some cash, but am curious to know that how much bitcoin can be mined per day with a pc if it has the configuration like : processor= Intel Core i5 6600K 3.50GHz ...
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Minimum how much bitcoin may I get per week if I stake 0.05BTC?

If I keep my pc on for 17 hours a day, then minimum how much bitcoin may I get per week if I stake 0.05BTC ? -Thanks.
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Primary security risks of Bitcoin QT API use

When using an API to operate Bitcoin QT remotely, which security concerns should I be most worried about?
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33 views

What versioning scheme does Bitcoin Core follow?

I saw a discussion recently about whether Bitcoin Core was following the Semantic Versioning scheme. I could not find information in the GitHub ReadMe.md or Contributing.md. Luke-Jr stated that ...
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61 views

What are some forks of Bitcoin that ultimately failed?

Being as many of the popular cryptos today were forked from Bitcoin at some point, I'm curious which past forks seemed promising, but ultimately failed at some point.. Sort of a history lesson if you ...
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1answer
41 views

Random 'The operation has timed out' errors in JSON-RPC

I run Bitcoin Core QT and ASP.NET website on the same webserver. My website communicates with Bitcoin Core QT via JSON-RPC. There are hundreds of requests behind the scenes. Sometimes a request ...
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Is it possible for an individual to start their own blockchain working with Bitcoin Core?

Is it possible for an individual to create their own blockchain from Bitcoin Core? I think the value of BTC is currently controlled by miners in China and I want to create a blockchain with either a ...
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1answer
24 views

Sharing the Master Keys in BIP32

What is the Best way to share the Master Public Key and Master Chain code generated using BIP32 in Bicoins with a user that I don't trust ? I just want the second user to monitor my wallet and not ...
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57 views

Transfer from Bitcoin Core to Electrum expired before full synchronization. Where are the bitcoins?

I started using Bitcoin Core and transferred coins to this wallet. When synchronization got to the point where the coins showed up in the wallet I sent them on to an Electrum wallet, although Core had ...
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How can I choose the address bitcoins are sent from?

So let's say I have multiple bitcoin addresses (some of them already received bitcoins), created a new bitcoin address, received bitcoins on it and would like to use the very same address to send them ...
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157 views

Why does Bitcoin Core take up so much space?

I have downloaded Bitcoin Core and the blockchain has nearly filled my local storage. Can i move the wallet to a hard drive and then delete Core from my computer? I'm a newbie lol
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How to track Segregated Witness adoption rates

How can I find out what the current Segregated witness adoption rate is, so as to see how it is progressing towards the 95% readiness required for it to activate.
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51 views

how to configure bitcoin-core (bitcoin-qt) to not use change addresses?

Can bitcoin-core wallet be configured to not use change addresses, but just one address? If yes, how? Thanks (PS: I know most people will try to convince me that this is not a good thing, but I have ...
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26 views

Why are some transactions unavailable in my debug window?

I got a block and asked for the data in its first transaction and that generated an error. The following is from the console tab in the Debug window: 10:52:52 getblock ...
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1answer
83 views

How to enable replace-by-fee via command-line in bitcoin-core?

Alright, so I'm convinced replace-by-fee is a good thing. I've read it's opt-in, so how can I enable it in my bitcoin-core wallet? I don't find any flag to pass it when launching it. I want all my ...
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17 views

Antrouter not hashing.

So I got my antrouter the other day. I set it up with my bitman account. When I go to antpool a new tab shows up called antrouter. I thought I had done everything right. However when I check on my ...
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70 views

How to connect to a remote Bitcoin Core remotely

If I have 24/7 running bitcoind on a headless server, is there a graphical way to connect, maybe only temporarily to the server's Bitcoin Core daemon or its client to see if everything is going ...
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54 views

Need help to understand where bitcoin transaction has gone

I am new with bitcoin and I need some help from experienced members. I have a server with bitcoin core where we accept some payments and use bitcoin core as mercant. The problem is that we have got ...
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Relationship between SIGHASH types and sequence numbers

The is a specific test case inside of tx_valid.json inside of bitcoin core that I am having issues with for my library bitcoin-s. ["Same as above, but we change the sequence number of the first ...
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90 views

Allowing Incoming Connection on Bitcoin Core

Good Evening, I recently installed Bitcoin Core v0.12.1 on my home server (running Windows 7) and wanted to allow it to accept incoming connections and used the guide found here: https://bitcoin.org/...