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44 views

Using BTCPay To Accept Undefined Payment Amounts

Following advice from users on this site, I have implemented a BTCPay Server and got it set up to receive payments. I am comfortable using the API. My need is to set up receive addresses for many ...
3
votes
1answer
37 views

What does “generate” mean when it appears as a transaction's type?

What is "generate" as a bitcoin transaction type? Why are "generate" transactions labeled as "immature" for 100 blocks? Is this type of Bitcoin transaction spendable?
0
votes
0answers
15 views

Can I get all block header data like the SPV node?

It hasn't been long since I studied Blockchain. I only need header data, not all block data, for study purposes. As far as I know, the SPV node stores only the block's header information. Can i get ...
0
votes
1answer
21 views

Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Was this an error?

Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Is this an error? I have been through a lot of the BIP documentations, but cannot seem to find any ...
1
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0answers
17 views

How can I add the MySQL C++ connector to Bitcoin Makefile?

I'm trying to add a custom function to my bitcoin client that queries a mysql db. I followed this guide for the basic: https://technology.finra.org/code/compile-run-customize-your-own-bitcoin-client....
1
vote
1answer
72 views

Would this alternative to Proof of Work work? [closed]

I'm fairly new to the subject, but I've read enough to figure out that Proof of Work has a problem concerning mining pools, and other alternatives don't seem to convince me either. I thought of my own,...
1
vote
1answer
37 views

Retrieving bitcoin from old seed [closed]

In January 2016 I bought a bitcoin but I don't remember what program I used. I used the seed code and now I entered a wallet. However, it is empty. And it also says there haven't been any transactions ...
1
vote
1answer
37 views

How can I download a single Bitcoin block?

I just started studying bitcoin. I would like to be able to download a single block from the Bitcoin network. I referred to the following: https://blockchain.info/rawblock/...
1
vote
0answers
23 views

Wallet.dat bitcoin cash? [closed]

I had 20 btc in 2012, and I spent it all in December 2017. I heard there was a fork for Bitcoin cash. How do I get my 20 bitcoin cash out of my wallet.dat ?
1
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2answers
42 views

Correct Approach for Payments on Multiple Addresses

I have clients that would like to pay for services in BTC. TL;DR To generate a new payment address must I generate a new private key (essentially a new wallet)? Is it better to generate independent ...
0
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2answers
31 views

Why I have some many address when I only created two wallet address in Electrum?

I am new to this. I have created two new wallet addresses (labeled init and init2). However, when I click "View > Show Addresses," I found a lot of addresses. Why? What do receiving and ...
1
vote
1answer
38 views

Relation between bitcoin address/private keys size and number of characters?

Bitcoin address is 25 bytes long, address = [Version Byte (1)][Hash 160 (20)][Checksum (4)] whereas number of characters in this string are 34. Same with private key: 32-byte have almost 52 ...
0
votes
1answer
37 views

How to get address type(format). Need to calculate vsize and fee

Help me please. I need to calculate vsize and multiply it by the function result estimatesmartfee. To calculate vsize, I implement a formula like this https://jlopp.github.io/bitcoin-transaction-size-...
1
vote
1answer
28 views

What was the first BIP9 block? Block 370,434 (0x20000007) or Block 398,364 (0x30000000)?

Block 370,434 (00100000000000000000000000000111) and (0x20000007) Yes: BIP9 says set top 3 bits to 001. No: BIP101 explicitly says set first, second, third and 30th bits to 1. No: No mention of BIP9 ...
0
votes
1answer
21 views

is bitkingdom.org legit?

My grand father invested in a bitcoin scheme few years back he died recently.In his whatsapp he had all details about this investment. I Have no idea about how this works. I tried looking around for ...
0
votes
1answer
22 views

How does `createrawtransaction` and `fundrawtransaction` work with Elements?

I know how to create and fund bitcoin transactions using createrawtransaction and fundrawtransaction methods. I tried to use the same methods in Elements to create a transaction on regtest and I'm a ...
1
vote
0answers
22 views

Is there an API to create transactions in the Bitcoin blockchain with only a private key?

Is there an API to create transactions in the Bitcoin blockchain with only a private key? I am new to working with the Bitcoin and using its API. So, I have searched the API documentation. And here is ...
1
vote
1answer
29 views

bitcoin-cli how to verify balance

I've read that addresses alone are a "confusing" way to think about "where" bitcoins "are". Nonetheless I was formerly (2018) able to correlate what I got from bitcoin-...
0
votes
1answer
24 views

What is the optimal way to increment extranonce?

I'm trying to learn how to block headers are created and an efficient way of doing so. Given a list .of transactions, can I change the extranonce without having to rehash the entire list? EDIT: To ...
0
votes
0answers
11 views

Fatal LevelDB error: IO error

I get that error in my testnet node Fatal LevelDB error: IO error: /home/bitcoin/.bitcoin/testnet3/indexes/txindex/021208.ldb: Bad message I tried with reindex-chainstate but I get the same error.
1
vote
1answer
26 views

Who bears the transaction fee for settling HTLC in Lightning Network?

Given a channel that exist between Alice and Bob, where Alice wants to transfer 0.0001 BTC to Bob. Alice makes HTLC payment to Bob contingent to the secret for the payment hash within a timelock of ...
0
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0answers
14 views

Is HWI support for QR-code based HW possible?

I was listening to interveiw with COBO vault hardware wallet creator and at some point, he mentioned that because COBO is QR-code (sd card option) connected only (non-USB), it can't be supported by ...
0
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0answers
41 views

How to recover bitcoin wallet from messed up seeds [duplicate]

I have a ledger nano s wallet that is broken , when i tried to recover wallet from 24 recovery word i got error that says the recovery phrase is incorrect, i think the place of some words is incorrect ...
0
votes
0answers
21 views

Padding the blockheader in sha256

The block header size is 80 Byte (640 bits) so we must pad it to a multiple of 512 (In our case to 1024) like this: (blockheader in binary)+1+00000.....000+1010000000 where "1010000000" is ...
0
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0answers
15 views

Multisig Wallet Help

Hello everyone I'm jud3v and i'm searching an api that provide me the same as electrum wallet for creating multisig wallet 2-of-3 for my client to protect there btc with multisignature. I have already ...
0
votes
0answers
22 views

How i can protected my bitcoincore project?

I have two servers. The backend is located on one, the bitcoincore is located on the second. Becken on a laravel, when requesting Bitcoin core, I specify the server ip and pass the username and ...
0
votes
0answers
32 views

corruped wallet.dat / Nversion / bitcoin 0.20.0/ pywallet or other… LILTLE Reward?

Good morning all I introduce myself dydy94 ... I am not an expert in coding but I learned well, the few days preceding this post ... I also got lost a lot: / LOL ... Here, good, I offer 25 $ / 25eu or ...
0
votes
0answers
14 views

How accurate is 'estimatesmartfee' in bitcoin-core?

Method of estimatesmartfee is very simple and easy to use and understand. But I want to know how accurate this function really is? It would be great help if you can provide a link to article or ...
2
votes
1answer
27 views

How to fetch all UTXO from a SPV wallet using bitcoin-filter.js (or other lib)?

I am using bitcoinjs-lib to create private key (WIF), addresses and sign the transactions. I would like to fetch all transactions (UTXOs) associated with a wallet. I found these libs: bitcoin-filter ...
0
votes
0answers
37 views

The Generator Point (G) in Eliptic curve Cryptography

I am aware that the generator point (G) in Ecdsa is constant... But if I we're to calculate an equation using this number, I don't know if I should use the compressed or the uncompressed format of the ...
-3
votes
0answers
41 views

He is scamming me. Is there any way to trace his location? [duplicate]

Well I just found out that he has scammed a lot of people already. i was lucky enough to not be one of them. Im still interacting with him but he does not know that I know what he is up to. He ...
0
votes
1answer
15 views

Can we determine which one of the referenced outputs corresponds to a cashback transaction in BTC transaction scripts?

let me quickly elaborate the question. The structure of a BTC transaction script looks somewhat like the following example "...
3
votes
2answers
53 views

What is the default number of transactions a full node have in its mempool?

Is there a default limit to the number of transactions a node can keep in its memory pool? Or do we have to explicitly declare maxmempool=xyz to restrict the number of transactions a node can have in ...
0
votes
1answer
20 views

Bitcoin Core Vs Daemon (Windows 10)

I assume that if I've Bitcoin installed locally and I either run the GUI or the Daemon... It's the same wallet, data? To that end, if I want to use the RPC interface, can i just use the GUI while ...
2
votes
1answer
183 views

How Bitcoin-Core estimates Transaction fee?

I want to know how Bitcoin-Core estimates the Transaction fee and what factors it takes into account to estimatesmartfee. What is the formula that it uses? Can you also refer me Bitcoin-Core files ...
2
votes
1answer
35 views

Cannot import python-bitcoinrpc

I am unable to import the package bitcoinrpc. I have installed it in python2 and python3 using python3 -m pip install python-bitcoinrpc/python -m pip install python-bitcoinrpc AND by cloning the repo ...
2
votes
2answers
25 views

Is there an RPC command that checks for hardforks

There are some useful RPC commands that you can use in your bitcoin.conf file to trigger code when blocks have been confirmed, such as the blocknotify command. Is there are similar command that will ...
1
vote
1answer
23 views

Verifying Bitcoin Core Integrity using PGP

I downloaded the Bitcoin Core v0.20.0 from https://bitcoin.org/en/download To verify, I first imported the signing key at https://bitcoin.org/laanwj-releases.asc and then ran command: gpg --import ...
2
votes
1answer
39 views

What is the current size of txindex folder when txindex=1 set? [duplicate]

Due to reputation limitations, I cannot ask for an update on this question: How much extra disk space does txindex=1 require? What is the current size of the txindex folder when txindex=1 is set in ...
0
votes
1answer
25 views

Trying CashApp to add funds and purchase Bitcoin immediately but not working, Have done all banking requirements, IS THERE ALTERNATIVE [closed]

Details: I was successful in entering in my bank information on Cash App however, keeps saying transfer failed even in the process of adding cash into the app from my bank, so I can use that to buy ...
0
votes
1answer
10 views

Why does BIP174 take Xpubs but no addresses?

I have a few questions on BIP 174: XPUBs: I am looking at BIP174, and I see that I can define a global XPub. How is this used. How does an updater, signer, or finalizer know what this XPub is for? ...
0
votes
0answers
38 views

generating a private key for a blockchain wallet [duplicate]

I hired a broker to make forex and crypto profits for me. They did and put it in my broker account. the only method to get the profit out was to put it in a blockchain wallet. After they did this, ...
1
vote
2answers
82 views

How to check that I control an address

I recently created a bunch of bitcoin addresses (public starting with 1, PK starting with 5) from a paper wallet, that I downloaded from their github (https://github.com/walletgeneratornet/...
1
vote
0answers
38 views

How to build coinbase transaction from bitcoin core?

I am coding a program that connects to bitcoin-qt as local server. For building the blockheader i need the merkleroot, to build the merkle root, i need the coinbase transaction (which is not provided ...
0
votes
1answer
35 views

How to detect that full node is in sync (using jsonrpc)?

I have full bitcoin node available through jsonrpc interface. How my app can detect if this node is in sync with the network?
2
votes
3answers
57 views

Does descendant size affect transaction fees?

While calculating the transaction fee miners usually take ancestor size into the account. But does the descendant/output also affect the transaction fee calculation? Is descendant count correlated to ...
0
votes
1answer
36 views

Why Bitcoin Core does not support importing extended public keys directly?

I'm trying to create a watch-only wallet importing the extended public key from a Ledger Nano (as an example) but is not to easy to do directly to my Node, I should do it through electrum personal ...
2
votes
1answer
28 views

Is a 'seed phrase' independent of the type of wallet?

I have had a few things happen on my PC and for the moment can't directly call up my bitcoin in its old wallet. There are files from various wallets sitting in my home directory but before I try to ...
2
votes
1answer
17 views

What are best practices around toggling between multiple wallets in bitcoind?

I've created a couple wallets on Core to experiment with and want to dedicate one wallet as a live one. What is the best way to move between those wallets inside the command line? When I toggle to a ...
4
votes
2answers
88 views

Is that proved that for each block there is always nonce value which will make block hash to start by n count of 0

Sorry for the obvious question, but I'm looking for a mathematical prove. Block header is calculated as a concatenation of the following values. Version hashPrevBlock hashMerkleRoot timeStamp Bits ...

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