Questions tagged [bitcoin-core-development]

Source code and development of Bitcoin Core, the reference implementation of Bitcoin.

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Does Bitcoin-core support creating a new Bitcoin blockchain?

My goal is to add a new feature to Bitcoin, which requires changing the structure of the Bitcoin blockchain. So I was wondering if Bitcoin Core supports having a new/own Blockchain? If so, how to do ...
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Bitcoin HD Wallet using C#

What packages do I need to use for creating Bitcoin HD Wallet in C# using BIP44? How can I connect to a remote Bitcoin Node to read all the deposit transactions received by various child addresses in ...
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What are the upcoming scaling and privacy improvements for Bitcoin past 2021?

Taproot is coming in 2021-Nov, but its been worked on for the last couple of years. What are upcoming improvements to Bitcoin that are just being talked about or being tested?
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Can someone explains me about Liquid Network

I'm trying to integrate liquid network with my node.js application. Such that i want to create liquid wallet address, send a transaction from 1:1 on liquid network and check balance for that wallet ...
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2answers
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Merkle tree hash - Computing hash manually doesnt match the one computed by SHA256D64

I am trying to go through the code to check the merkle tree hash computation done by BlockMerkleRoot in bitcoin core. The hash computed using online tools by appending transaction hashes is different ...
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What does unbroadcast mean? What does it mean for a transaction to be successfully broadcast?

What does "unbroadcast" mean? What does it mean for a transaction to be "successfully" broadcast? These questions were asked in this Bitcoin Core PR review club on PR 2261 hosted ...
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Bitcoin botnets are not a problem. What is stopping ASIC resistant bitcoin now? [duplicate]

Many have suggested solutions to the botnet problem. Including being able to see your cpu rate; genuine miners to see their incomes dropping , etc. If we tried, there are easily solutions we can find ...
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Are multiple parents/children possible in a block?

I always learnt/thought bitcoin blockchain is like a linked list and it can have only one parent and one child at max
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Where does a single script go in the Taproot tree of a script path spend?

If I only have a single script for the script path does the hash of the script get placed at the top of the Merkle tree (instead of the effective Merkle root) or does it get placed in level 1 of the ...
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1answer
63 views

What wallet support for Taproot will be included in Bitcoin Core v22.0?

What wallet support for Taproot will be included in Bitcoin Core v22.0? What will I be able to do and what won't I be able to do using the Core wallet?
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1answer
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If the Lightning Network is so great, why is it “level 2”, not stable and not built into Bitcoin Core? [duplicate]

Lightning Network, as it's described, seems to solve all the problems with Bitcoin. I'm unable to accept payments due to the insane fees, but would be able to if Lightning Network were supported. But ...
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1answer
47 views

What should I include in the description of a Bitcoin Core pull request?

What should I include in the description of a pull request (PR) that I open to the Bitcoin Core repo to help reviewers quickly get up to speed and efficiently review and test the PR?
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What does net_processing cover conceptually in the Bitcoin Core codebase?

What does net_processing (.h and .cpp) cover conceptually in the Bitcoin Core codebase?
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71 views

Bit Coin Mining

Sorry for being noob. I am in the process of developing Bitcoin Mining in Python, just curious about whether, can we able to receive the percentage of guess in Target Hash Function via API. For ...
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What do the classes ChainstateManager, CChainState, CChain and BlockManager do in Bitcoin Core?

What do the classes ChainstateManager, CChainState, CChain and BlockManager do in Bitcoin Core? Why do CChainState and CChain have a leading 'C', but ChainstateManager and BlockManager don't? These ...
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BITCOIN: get bitcoin transactions list by time using RPC on my node

I want to get the transaction list of a bitcoin node i have. I need to know: How do i get the transaction list filtered by time (1h, 2h,...) using RPC, I have been searching on bitcoin developer: RPC ...
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103 views

What contributions have Chaincode developers made to Bitcoin?

Related question: What contributions have Blockstream developers made to the Bitcoin project? Blockstream's contributions and involvement in Bitcoin is discussed a lot. I want to know Chaincode Labs's ...
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1answer
55 views

How to save the mempool information immediately before the node receives a block?

I want to use Bitcoin RPC API 'getrawmempool' to save the snapshot of the mempool immediately before my full node receives a block. This requires modification of the Bitcoin source code. How should I ...
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what is the longest period for a bitcoin transection to be confirm? [duplicate]

It's been three months but the bitcoin transaction has not been completed. Can anyone inform me?
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What is cs_main? Why is it called cs_main?

What is cs_main? Why is it called cs_main? This question was asked during the May 12th 2021 Bitcoin Core PR review club hosted by John Newbery on a Carl Dong PR to de-globalize ChainstateManager. (The ...
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1answer
32 views

What does validation cover conceptually in the Bitcoin Core codebase?

What does validation (.h and .cpp) cover conceptually in the Bitcoin Core codebase? This question was asked by Larry Ruane at the May 12th 2021 Bitcoin Core PR review club on a Carl Dong PR to de-...
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1answer
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Where change the size of the window in Bitcoin code?

I already try changeing the height and width parameters of the forms in src/qt/forms but nothing changes, where else i need to look?
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1answer
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Why are adresses not showing up in gettxout?

I have a bitcoin node but whenever i try to gettxout i get this response: user@bitcoin:~# bitcoin-cli gettxout "0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098" 0 { "...
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How can i locate my deceased husbands bitcoin? [duplicate]

My husband passed away 4 years ago and he bought a lot of shares in bitcoin when it first became a thing. How can i find out who he purchased these through in order to accuquire about his shares?
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How Cross border Crypto remittance apps work?

I want to develop an app that allows people to send money cross border using crypto currencies, I am trying to understand the services my app will need to achieve such? Interms of for example, how do ...
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2answers
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Who approves the feature and bug code reviews in Bitcoin?

I see a list of Bitcoin feature and pull requests here. How do all million plus users agree to these feature/bug requests? Do all users of Bitcoin have to approve them, or who represents them in ...
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Will BTC script be Turing complete in future?

I want to know if BTC script will have loops in it in the future?
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Bitcoin core balance won't show up!

I have bitcoin core wallet i havent use since 2013. i let it sync fully now but it won't show my bitcoin balance and this shows up..... Warning: Unknown block versions being mined! It's possible ...
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c++ code how to restore wallet keys from mnemonic seed phrase

so iam trying to code some wallet functions in c++ i need to do the following. starting with a seed phrase restore the private keys and bitcoin addresses (all addresses generated from the seed phrase)...
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1answer
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Are the blocks in blkxxxxx.dat files ordered by block height?

I'm parsing out de blockxxxxx.dat files for the bitcoin blockchain. Are the blocks ordered by height? So is the order of the data for everybody the same?
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Please i need help about BitlyCore.com [closed]

Please I need help. I want to know if anyone knows about BitlyCore.com I have been running the full block for days now and it's just stuck at 87% please I need help.
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Is cryptofree.casa genuine plateform to earn free BTC [duplicate]

As O recently login to Cryptofree.casa website, someone told me that after once it reach to 0.2 BTC then I can withdraw my wallet BTC so is it correct information??
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50 views

When should proof-of-work be done? Does it involve in mining a coin? Can it be done without real transactions to be recorded?

I am trying to understand about what bitcoin is. I conceptualize bitcoin as a proof of work required when a new block (or new coin) is created. I also understand that a proof of work involves finding ...
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I just need some advice or assistance if possible? I'd really appreciate anyones 2cents on this

I sent BTC from Paxful to an exchange called LAtoken. $36 worth of BTC was sent, nothing major to anyone else but really huge to me. Cope pasted and confirmed address. NO btc arrived almost a day ...
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Bitcoin Core: Unit Test Failure: system_tests.cpp: Line 48 BOOST_AUTO_TEST(run_command)

I cloned the Bitcoin Core and did the build. But, I am experiencing a Unit Test Failure in system_tests.cpp, Line 48 BOOST_AUTO_TEST(run_command). First, my environment: Hardware: Intel i7-8550U @1....
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Btc sent is yet to be received for over three weeks it was sent from a coinme wallet to a binace wallet [duplicate]

It’s been really hard understanding what happened Here’s the transaction HASH https://www.blockchain.com/btc/tx/b4a8e885988b8694dcccdaab83456d23544604b19be1f2bef376884f3e5bcd34
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How do senior bitcoin devs plan to share their knowledge and experience with others?

I understand Bitcoin is open source and people contribute, leave at some point (planned or unplanned) and things must go on. There are few people after a decade who are respected for their ...
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3answers
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Problems about update of protocol of bitcoin

I am new to crypto. I want to ask if in the future, bitcoin has a significant protocol update, will there be a recycle (or some kinds of buy-back or repurchase?) of old tokens or an automatic update ...
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1answer
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How Often Is “Contributors” Section Updated on Bitcoin.Org

Believe I have a screenshot of contributors organized by number of commits that can be found here. Does anyone know how often this list is updated? Currently I count 361 contributors on that list bit ...
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vSeed Required or vFixedSeed Enough?

Im creating a new alt coin so I can understand the technology and have most of my changes done and I am trying to understand the vSeed and VFixedSeed logic. I don't have a DNS that will serve up a ...
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1answer
53 views

Why does the value range of outputs need to be restricted?

In the 'tx messages' section for protocol rules we have Each output value, as well as the total, must be in legal money range For each input, if the referenced output does not exist (e.g. never ...
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1answer
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Bitcoin Core Development Contribution

I have learned a lot about how bitcoin works. Now I want to contribute to bitcoin source code, how can I do this? Of course, bitcoin is open source so anyone could go to the bitcoin repo here and ...
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Bitcoin cli Error: too few parameters OS X Big Sur

I'm running Bitcoin core,I struggled for bitcoin conf file till I found this and this is what I just have in it server=1 rpcuser=username rpcpassword=password rpcallowip=127.0.0.1 rpcport=1300 I have ...
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1answer
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What is DrahtBot on Bitcoin Core pull requests?

I see DrahtBot on a lot of Bitcoin Core pull requests (PRs) e.g. here. What does it do? Is it open source?
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Bitcoin Core Security

Is there any site or resource where I can learn how to do security transactions while trading on bitcoin testnet
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1answer
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Bitswallet core

Please does anyone know how to synchronise bitswallet with network. Have been trying to synchronise mine with network. But it does not seem to be synchronising with the network. I need help fixing it. ...
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Changes for bitcoin.conf file and details on the testnet network bitcoin-core

I have installed bitcoin core testnet and it is now synchronized with the network after 24 hours. My question is about bitcoin.conf file. I will tell you the procedure I used to install: I created the ...
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How to dump all transaction from single bitcoin address?

How to get/dump/or download/curl request/ for all transaction from single address ??? I need info about txID's, scryptpubkeys, txinwitness and other deep info about transactions Br.
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1answer
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Other than relying on “side-chains”, is there any way that Bitcoin could solve “micro transactions”? [duplicate]

I am very aware of the Lightning Network, and have repeatedly tried to gain a full understanding of it and start using it. I find that, whether it's due to it being too complex or me being too stupid, ...
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What vulnerabilities have been found in Bitcoin Core using fuzzing?

Is there a list of vulnerabilities that have been found in Bitcoin Core using fuzz testing?

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