All Questions

I have created a regtest node bcoin, I would like to know how to create the second regtest node to send transactions between nodes and you could also tell me how to generate addresses for the second ...

hello I am building a web application using nodejs, bcoin and my application provides the user with a bitcoin address in which to deposit funds, I would like to know how I can listen on my nodejs ...

I've followed the bip32 and bip39 specifications for generating the 512-bit seed, however I didn't understand how to generate the xpriv from this. I've used the left 256 bits for the private key and ...

I have a synchronous (1G/1G) network connection and I was willing to put up a full node that allows inbound synchs, but not without figuring out how someone opened a rogue wallet on my system. This ...

When I connect to my bitcoind instance over RPC, I need a password for that, but no certificate. So how are man-in-the-middle attacks prevented on that connection?

I am designing an API which will utilize libsecp256k1. I am trying to hide most of the low-level stuff, and context is one of the things I want to handle for a consumer of my API. It would be ...

I don't fully understand the meaning of the witness version byte. I am not sure if I confuse the address format prefix bc1 with the witness version. My understanding: The extra byte reserved for the ...

I recently started mining with some left-over GPU time. My server is running Ubuntu. nvidia-docker run --memory="7g" -d kriation/ethminer -P stratum1+ssl://...

I have heard that there are static AMP invoices that can be reused multiple times (at least in LND). But previously I understood that you should never reuse the same paymenthash, because you could ...

Fetching getnetworkinfo should result in IPv4 and IPv6 flags set to false and Tor to true. This will ensure that I am operating my node privately. But this is not the case for me. This is what I ...

I'm using bitcoinlib for python to create a transaction and send it but I'm getting the following error: Funds not sent, exception error: Error connecting to blockchair on url https://api.blockchair....

I'm trying to restore my old wallet which I had created on Multibit around 2016 and held a fraction of a bitcoin, as far as I can remember. I have not touched the wallet for years until today when I ...

I'm working on a mining script and i just want to really be certain for sure as I wouldn't want to waste Time & resources. Q1 - Is the coinbase transaction automatically generated by the ...

I made a terrible mistake, I was doing some crypto transfers and I wanted to exchange ZMAX for XRP by mistake I copied the XRP contract instead of the correct destination address, I sent all my funds ...

just a general question, would it be ethical to start mining bitcoin using a shortcut, in the SHA256 hash (if that may even be possible), and mining at a much much faster speed using very less ...

I am doing a research project about Crypto regulation. From what I read, Know Your Customer and Anti-Money Laundering compliance from exchanges are legally required in the US. However, a quick search ...

I apologize, I tried to make the title as concise as I could. If a Blockchain, say the Bitcoin chain, has some NFT that exists uniquely (by definition of an NFT) on that blockchain, what prevents the ...

What is the difference between capacity and max_htlc in the routing of payments in the network?

I'm using the bitcore-lib-cash to attempt to create an instance of Transaction (_fromNonP2SH). Transaction.prototype._fromNonP2SH = function(utxo) { var clazz; utxo = new UnspentOutput(utxo); if ...

I have a short message I wish to forward to this person. I don't have any "social media" accounts (nor can I get them). I'm not expecting a reply. I just want to comment on something ...

Using this post to define the format of a transaction: Create Output with a bunch of input Why is the previous utxo index (also called the previous output index) 4 bytes? The maximum output index ...

I have an old (2014) paper wallet I've deposited coins into over the years. I have another paper wallet that was generated around the same time, but wasn't used until last year. I just finished ...

In February I sent 2003usdt from Binance to Bitforex, but the transaction never reached Bitforex. I've contacted both platforms with zero help in retrieving the funds. Can anyone help me please?

I would like to watch a set of Bitcoin addresses and be able to execute some logic as they receive a payment. According to this answer it can be done using blockchain.info: const Socket = require('...

I want to know if possible to have the same bitcoin core and his same wallet running at the same time in two different machines, can I use the same RPC user/pass, I have o machine running but I want ...

Please check out this link : https://www.blockchain.com/api/api_receive As you see we can generate receiving addresses for our customers using this api. My question is what is the type of that ...

While looking in mempool i saw with increase in sat/vbyte the number of transactions decrease. are they somehow related?

I'm not looking for a number, but rather for a way to make an estimate taking things like market capitalization and the fact that mining uses ASICs into account. (I assume ASICs are relevant since ...

I am fairly new to blockchain technology, so bear with me if i make mistakes So lets say there are 10 people trading a cryptocurrency 5 of them are online from 8 to 10 am and the other half on online ...

Im using bitcoincore to submit the block 536592. Is possible submit an old bitcoin block like 536592 using bitcoincore? Thanks

I use the first bitcoin faucet created by Gavin and I Don t find my keys that I write in a paper and my pc don t work anymore.. If someone can help.. I have more than 15btc.. I'm desesperated to ...

My questions about storing user assets: An exchange creates unique deposit addresses for each users. Are these addresses all derived from a HD wallet and exchange controls all the keys and indexes? ...

I have heard that Taproot will expand BTC's potential for smart contracts. Is this true? If it is, how so?

Is there a technical reason why Satoshi implemented Bitcoin with just 8 decimal places? The max number of 64-bit signed integers is usually 9,223,372,036,854,775,807 ; so with the 21 million cap an ...

I need help with my cold wallets. I have a multi-bit wallet and I know its 18-phrase seed key and password, but I know the password, but when installing the multi-bit program, 5 BTC appears in it, but ...

I am trying to learn how scripts are working. In a testnet i got some scripts working and learned a lot about what not to do. But now I am struggeling getting this to work. Originaly I worked with a ...

I recently had someone convert my sumcoin and said they were going to send to my Bitcoin wallet. I noticed that about $150 (of the $57,000) came through. He said that deposits of that size occur in 3 ...

What are the main technical differences between Bitcoin-core (BTC), Bitcoin SV (BSV) and Bitcoin Cash (BCH)? At what block number did the fork take place? Do they integrate Segwit/Taproot? What ...

I use bitcoincore to submit a block. Can I earn somekind of reward submitting blocks? Thanks

You hear often that Bitcoin is using so much power/energy. It is explained to me that all the nodes in the network compete to mine the next bitcoin block by resolving calculations. Would it be a idea ...

Can I ask for a P2TR transaction id example past block 709632? I was trying to debug one of my scripts and something is wrong when searching for witness_v1_keyhash, and couldn't manually find one in ...

I've kept the same config file and internal hard drive for my Bitcoin Core datadir for many years. I've updated to numerous new versions. The other day, I reinstalled Windows on the system drive again....

Is there is reason why Bitcoin uses signed instead of unsigned integers for amounts? I can't imagine a scenario where negative amounts could come up. Was it simply something Satoshi implemented for ...

I've read a lot of comments/posts on the internet and most of which are talking about buying a professional mining-machine. However, I am just wondering, on the software side, how do I technically ...

I'm trying to get my head around how the Inverse Perpetual contacts work. And failing. From a short position point of view i found information that says i have to borrow BTC. But where am i borrowing ...

My public key, as it's displayed in MultiBit Classic, has remained unchanged in the last eight years since I bought my bitcoin in Jan 2014. I'm now looking to move my bitcoins from MultiBit Classic ...

When full-node receives a request from SPV client to check if given transaction exists in the blockchain - does it always re-calculate the merkle tree on the fly in order to return merkle path + block ...

I was wondering if there was a Bitcoin wallet like electrum with features like getting balances, and sending/receiving transactions, but not have to store the full blockchain (a lightweight wallet). I ...

Java. bitcoinj i have private key String str="5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf"; i try get compress and decompress. 2 adress. in this format : ...

Goal: Calculate a BIP32 Extended Private Key from a Master Private Key and Chain Code using a specific Root Key. Documentation: BIP32 CKDpriv I am using a normal child, with i = 0. My HMAC-SHA512 ...