Questions tagged [bitcoincore-development]

This tag should be used for questions regarding Bitcoin Core development. This includes questions about the source code and development of Bitcoin Core.

0
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1answer
38 views

Total Bitcoins in circulation on any given day? [duplicate]

I'm creating a spreadsheet to track total bitcoins in circulation from day 1. This would be to add up each Bitcoin per day created and add to an accumulating total. For example, if we picked any day ...
0
votes
1answer
54 views

json-rpc of bitcoin not working for testnet(curl command)

I am trying this command to get transaction from bitcoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/...
0
votes
1answer
19 views

How do I start a bitcoind server in deprecated mode for multiple functions

I have a bitcoind server running bitcoin-core version 0.17. Now since I need to use deprecated RPC methods I need to start the bitcoind server in deprecated mode, so I am already able to run it to ...
1
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2answers
34 views

How do I install a specific version of bitcoin-core

I need to run bitcoind version 0.17, however the latest available version is 0.18, if I follow the instructions from this link it installs the latest version. The below links lists the packages for ...
1
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1answer
121 views

Adding Dependencies to Bitcoin Core

I am currently editing a fork of Bitcoin Core. I have three libraries I would like to add as dependencies. One is my own creation (CPISync) and it depends on a second library (NTL) which in turn ...
12
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1answer
1k views

Where in Bitcoin Core does it do X?

Note that this is a general question and answer designed to serve as a guide for finding things in Bitcoin Core. Where in Bitcoin Core's source code does it do X? How can I find that code by myself? ...
0
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1answer
56 views

Prompting an account name

I made an account "hello" in bitcoin daemon and wanted to run this. Whenever i put in hello when prompted, getac1 would return empty array; whereas, getac2 and getac3 returns addresses associated with ...
0
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1answer
36 views

How to transfer BTC balance when I have Private Key? [duplicate]

I have BTC public address and privatekey with balance. Can I Transfer the balance for another address?
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4answers
1k views

Are there any opensource PHP cryptocurrency exchange/marketplace

As the title suggest, are there any opensource PHP cryptocurrency exchange/marketplace. Most of the ones I found does not seem to work or are abandoned.
6
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1answer
361 views

What are the trust assumptions in --assumed-valid in bitcoin core 0.14?

Please help me understand and distinguish the trust assumptions in the following three cases shown below. Specifically, please elaborate the attacks possible (even though completely theoretical) and ...
0
votes
1answer
31 views

bitcoind bulk import private keys to different wallets and update with one rescan

I was wondering if someone already has this thoughts or problems: I generate bitcoin addresses and private keys by a script - to not depend on the bitcoin daemon and manage them in a database. By ...
0
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1answer
61 views

CScript to CPubKey or derive CPubKey from CScript

Please can someone advise if it is possible to derive the CPubKey from a CSript object? Provided i get it up with an address before hand, I can use numerous functions to attain all the info from the ...
7
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1answer
399 views

Could Neutrino technically as side-effect, incentivize centralization of the bitcoin network?

TWO questions on Neutrino:: 1) Could Neutrino technically as side-effect, incentivize centralization of the bitcoin network? Or other formulation: ...hinder higher degree of decentralization? Why ...
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0answers
31 views

Exception CompactSize when I parsering a nuimbar od the blk file >= 976

I wrote a bitcoin core parser, for my personal project and because it helped me to start understanding the bitcoin protocol as a data structure. This project mainly parsers every blk file and creates ...
3
votes
1answer
43 views

Differences to CCompactSize and CVarInt

I'm developing a parser bitcoin core and I have a problem whit the type CVarInt, I using the decodifier mode of the CCompact size but at the block 976 I Have a problem whit the type, because the value ...
1
vote
1answer
71 views

I formated my hard drive with bitcoin core on it

First timer here ...I downloaded bitcoin core a few weeks ago until last week where it still had not synced so i started all over...I was originally waiting for BTC CORE to synchronize(I missed the ...
1
vote
1answer
43 views

Script Null into raw trasaction bitcoin core

I'm developing a parser for bitcoin core and into the alpha test of the parser,I noticed than the script bitcoin core are null and the hash raw transaction exist. An example: for this transaction the ...
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3answers
58 views

Where can I find more resources that explain Bitcoin simply?

I have been learning crypto for a little bit now and have been helped a lot by pebwindkraft, Andrew Chow and Adam in particular. I would like to ask about resources that help beginners like me to ...
0
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2answers
615 views

Bitcoin adder or bitcoin generator or bitcoin hacker software

Nowadays I always see many persons selling bitcoin adder / bitcoin generator or bitcoin hacker software claiming that these are creating 1 bitcoin or more. I am unable to believe authenticity of ...
0
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1answer
69 views

Diferent redeemscript for the same scriptpubkey?

Most transactions to p2sh address has the follwing scriptpubkey HASH160 f45d94733d430261962932e0c847075195916a04 OP_EQUAL As I understood, this transaction do not need to be signed. Is it true? ...
0
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0answers
23 views

How to keep node mining automatically in qt wallet or console wallet

In the qt wallet, manually need to start the mining process in wallet console by giving generate nblock. so is there any other command or solution to automatically mine the block and how to confirm ...
0
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1answer
56 views

Converting raw scriptPubKey to readable format

I am debugging Bitcoin cpp code. I wanted to see what exactly come for scriptPubKey property of output. Theoretically, I know this but I want to see in the code how does it looks like. Now while ...
0
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0answers
20 views

How to decrease target difficulty in bitcoin source (v0.8)

I have followed this video series ( https://www.youtube.com/watch?v=mDGxGYvkDEE ) to create an alt-coin by forking Litecoin v0.8, which i followed the videos and successfully created an altcoin. Now ...
1
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1answer
104 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 ...
0
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2answers
23 views

Bitcoin core make error

I am new to bitcoin core development. I have created a clone using bitcoin core on a mac os mojave 10.14.3. I am have installed all dependencies and am able to run the autogen.sh and configure with ...
0
votes
1answer
65 views

Help With Gitian-Builder - Failed to load “rcfile”

I' having hard time building the Bitcoin using gitian-builder. I'm getting closer but i'm stuck at this error and I dont know what it really means or why is it even there. I'm using the gitian-build....
0
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2answers
65 views

Verifying a digital signature that a transaction is going to an output with value X inside a script

Edit; after writing this post i have found that OP_CHECKDATASIG is basically this in a nutshell. It is implemented on Bitcoin Cash and may soon be on Bitcoin Core as well. Someone has even written ...
1
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1answer
64 views

Why was/is Bitcoin written in C++ instead of C? [duplicate]

Why C++ and not C? Are there some features of C++ not present in C required for Bitcoin to function as it does? I can see that a similar question has been asked before but I am more curious as to the ...
0
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1answer
44 views

Why future Bitcoin Core release shouldn't be in python?

Python offers various advantages including simplified rules of coding and ease of readability. It offers OOP, cross platform compatibility and has numerous libraries that have been added over time. It ...
0
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1answer
42 views

Need to use two bitcoin core but issue with syncing

Need to know how we can use two bitcoin node for example. I do have two bitcoin full nodes A and B. Created wallet address at A and has all transaction details at wallet.db in node A. But I need to ...
0
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0answers
13 views

Is their a way to use Bitcoin's Testnet/LN Testnet within CLI without downloading Bitcoind?

I'd like to start working with Bitcoin's & Lightning's Testnet but don't want to download bitcoind on my current computer.
16
votes
6answers
19k views

Where to find help understanding Bitcoin's source code in C++?

I am looking to understand the Bitcoin C++ source code on GitHub. The Python one is simpler, but even that is too complicated for a beginner. Could someone guide me to some good resources on the ...
2
votes
1answer
431 views

Where is the source code that allows new coins to be generated?

As per Bitcoin documentation, new coins are generated and brought into circulation when miner receive the reward. I am not talking about existing coins that are collected at the time of mining. Can ...
9
votes
2answers
165 views

BIP44: What's the use of internal addresses?

I've read other questions (and their answers) on this but I still don't see the use for internal addresses. I get that you're supposed to send the change of a transaction there but I don't see how ...
1
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1answer
90 views

How to discover startup flags or command-line options for bitcoind?

I'd like to query the Bitcoin daemon (bitcoind) to find out what startup flags (command-line options) were sent to it on startup (or the current state if it has changed, e.g. -server=0/1 changing). ...
-3
votes
1answer
57 views

Reset or backup from a blockchain possible? [closed]

i have a coin for my own interests. With this i will learn how works all. So i have install the daemon on a vps All works fine. Mining works. And the first 300 blocks i have created. Now i will ...
-4
votes
1answer
1k views

Bitcoin-Core Developers sharing e-mail address?

I've been looking into the Github commit history of Bitcoin. I have no clue how git works, but interestingly, I'm seeing a number of developers' mail addresses associated with commits of others. For ...
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1answer
41 views

Can i create wallet services of bitcoin core wallet [closed]

Is it possible to create wallet url services for bitcoin core wallet
0
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1answer
34 views

in transaction, what is 'hash' data?

i'm studying Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto and this paper introduce a transaction model. (above picture) but i don't understand what is 'Hash' means exactly i ...
1
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1answer
81 views

Extract sender ID and recipient ID of a bitcoin transaction [duplicate]

I'm new to this world and I'm trying to learn the blockchain world and especially now I've concentrated du bitcoin-core, I would like to parser and get the various information like the various sites ...
9
votes
1answer
3k views

Why does the default miner implementation use pay-to-pubkey?

Looking at the v0.9.3 source in miner.cpp: CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey) { CPubKey pubkey; if (!reservekey.GetReservedKey(pubkey)) return NULL; ...
0
votes
1answer
77 views

Unable to get transaction with json-rpc command

I am trying this command to get transaction from bitvoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/...
0
votes
1answer
56 views

Lightning Network: what about tx fragmentation?

I really have no idea how to aks it right. Let me give an example: We have a some peoples A,B,C,D.... And A makes transaction to B, then A need to pay to C, then send some coins to D, etc... After ...
4
votes
1answer
560 views

Is there a class or sequence diagram for BitcoinCore?

I'm looking at the code located at https://github.com/bitcoin/bitcoin/tree/master/src Does anyone have a basic diagram of what calls what, just a sequence chart of how all the classes piece together ...
2
votes
1answer
43 views

where is the adjustment calculation for the target value in the source code?

Can someone point me to the source code and explain how the average is calculated for the adjustment of difficulty that takes place every 2016 ? Update: i have consulted with previous questions but ...
1
vote
0answers
34 views

Bitcoin Wallet generation and TX signing [closed]

I am developing a Bitcoin Wallet in Javascript. I've worked on ETH but it's my first time on BTC. Here are following queries if anyone can help: How do we generate bitcoin Wallet like we do in ...
0
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2answers
135 views

Non-standard transaction scripts broadcasting

I'm developing an application on Bitcoin blockchain, and I use output transaction scripts that are not standard according to the classic payment methods. However, even so, on Tesnet everything works ...
0
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2answers
146 views

Invoking the listunspent command via json-rpc on a full node

I am trying to use the following example code for C# programming, so I can connect to my own bitcoin full node: https://en.bitcoin.it/wiki/API_reference_(JSON-RPC)#.NET_.28C.23.29 Which has resulted ...
10
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1answer
1k views

What is the tradeoff between privacy and implementation complexity of Dandelion (BIP156)

Dandelion is a new relay protocol for transactions on cryptocurrency peer-to-peer networks. It has been heralded as a huge privacy improvement for cryptocurrencies at the networking level– I'm ...
1
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1answer
95 views

Debugging Bitcoin Core with gdb - how to turn off compiler optimizations

I ran the configure script with the --enable-debug flag, then ran make. I am running unit tests: gdb --args src/test/test_bitcoin --log_level=all --run_test=script_standard_tests I'm trying to step ...