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1answer
23 views

Ripple difference between source and destination tags [closed]

I don't understand the real difference between source and destination tags. Imagine we have client A and service B, and service B wants to identify the payment (deposit from A). He says: please send ...
1
vote
2answers
73 views

How convert a mnemonic phrase back and forth between different number of words?

I'm relatively new to cryptocurrencies in general and I've tried using Bitcoin and a few altcoins, but it always bothers me that some digital assets are not available in all wallets. To my ...
0
votes
1answer
22 views

What is the relationship between the Digital Signature and the Public Key

So, I can see this is in the unlocking script: <Cafe Signature> <Cafe Public Key> Taken from mastering bitcoin. What is the difference between the two? I don`t find it easy to google.
0
votes
1answer
36 views

Fraudulent transaction

I have been in contact with a blockchain group and they are supposed to have a large amount of money sitting in my wallet waiting for withdrawal. I have had to send a large amount of money to try to ...
1
vote
1answer
30 views

Coin selection algorithm

Playing around with Bitcoin Core Client v0.18.0, I used this command: $ bitcoin-cli sendtoaddress "mozazucvLK179u41bF5Vd2Agp4wsm7HsPo" 0.1 which created this transaction. I noticed that the ...
2
votes
1answer
24 views

What means “fallbacks” in LN invoices?

Just saw a "fallback" property in LN invoice. Never seen before. Can you please describe what that means and how I can make an invoice with same property? I am using c-lightning. This is what i had ...
-1
votes
1answer
28 views

What feerate estimation APIs are there?

Some company's, block explorers and payment processors offer a public API for feerate estimations. Is there a list of publicly available feerate estimation APIs?
0
votes
1answer
55 views

Where is the AES-256 key/ IV pair stored in wallet.dat file?

I have created an encrypted bitcoin file. I know the password and I see the mkey in the hex dump. I would like to know where the AES key / IV pair are located in the wallet.dat file?
0
votes
1answer
16 views

My bitcoint-qt client is crashing due to insufficient file descriptors repeatedly even after I set the ulimits to 65535

What are the exact resource requirements for a bitcoin-qt client. this is important and hard to find information. In virtualization world those things need to be understood. :) I am running a KDE 18....
1
vote
1answer
28 views

What are atomic multi path payments (AMPs) and why/how is it being implemented in Lightning Network?

There has been a lot of discussion and articles around how the implementation of AMP is going to benefit the routing capabilities of Lightning Network. What is the exact issue in the current ...
0
votes
0answers
14 views

Javascript REST API to connect the local bitcoin node

Is there any javascript API available to connect the local bitcoin node(regtest) for sending the transaction to the network(regtest)?
0
votes
1answer
25 views

Can I print my public key using a custom logo?

qrycode monkey allows me to print a qr code with my company's logo in the middle. Q: Can I do the same for our public key?
0
votes
1answer
30 views

How Segwit makes transactions smaller? What about the witness?

I have seen similar questions without a clear answer. So, how does Segregated Witness make transactions smaller? I understand it removes data from the transaction hash and solves malleability ... But ...
0
votes
1answer
59 views

How can I turn off the output of bitcoins?

I use bitcoin core v.0.17 on the server. How can I turn off the output of bitcoins through bitcoind or bitcoin-cli or bitcoin.conf?
0
votes
0answers
14 views

Could not open socket for incoming connections

I am fairly new to bitcoin and was trying to set up a local regtest network with four nodes in the same machine by having different configuration file for each node. However when I try to bring up a ...
2
votes
1answer
35 views

How to calculate p2wsh signature?

I read the bip143, but didn't understand how to calculate the scriptCode of p2wsh. bip143 told us: A new transaction digest algorithm is defined, but only applicable to sigops in version 0 witness ...
0
votes
0answers
44 views

Issue while using create transaction API of blockcypher?

I am getting this error "Not enough signatures: 1 for 2 inputs" always while using create transaction API for BTC,LTC,DASH. Before few days ago its was working fine. But Now I am getting Error After ...
2
votes
1answer
222 views

I tried to recover the public key from the signature, but I failed

I used data that comes from https://github.com/bitcoin/bips/blob/master/bip-0143.mediawiki#p2sh-p2wpkh. It is easy to know how to get sigHash. But when I try to recover public key, everything out off ...
0
votes
1answer
35 views

I started build my own blockchain based on mastering bitcoin book using git on win7 and i have a problem

I started learning how to build a blockchain from Antonopoulos book using Git Bash and i have a problem. I used commands: git clone github.com/bitcoin/bitcoin.git cd bitcoin git tag git checkout v0....
0
votes
0answers
16 views

How to connect to bitcoin daemon running in VirtualBox using RPC?

I am running the bitcoin daemon with the following config in VirtualBox: testnet=1 daemon=1 server=1 txindex=1 mintxfee=0.001 txconfirmtarget=1 rpcuser=lubo rpcpassword=vranka rpcport=18332 ...
0
votes
1answer
20 views

Bitcoin compilation error: conflicting declaration

I'm trying to compile the Bitcoin source (1) on Ubuntu and I get: In file included from bench/data.cpp:10:0: ./bench/data/block413567.raw.h:1:40: error: conflicting declaration ‘const unsigned char ...
1
vote
1answer
26 views

how to get bitcoin off an exchange?

As a corollary to asking how to transfer from cold storage, how is bitcoin first put into a paper, or other wallet, when it originates on an exchange? My primary concern is more getting the coins out ...
0
votes
1answer
29 views

Including transactions in a block - rules and time / technical aspect

I’ve a question regarding block and transactions included in the next block that is solved. Let us assume theoretically that there is newly propagated solved block. And now there are: tx0 and tx1 –...
0
votes
1answer
40 views

BTC deposit old address exchange [closed]

i had BTC deposit to old address in coinsbit.io exchange after 20 days they told me we dont have access to old addresses to bring back your money and i know the only one can have this access is ...
1
vote
1answer
39 views

How to anonymously and privately purchase bitcoin through tor?

How can Bitcoin be anonymously purchased through tor in a secure and private fashion? My question is related to: How can I setup Bitcoin to be anonymous with Tor? Personal information and bitcoin ...
1
vote
1answer
28 views

Would proxying a lightning hot-wallet with a lightning cold-wallet make the hot-wallet safer?

(Edit: I realize how Mt.Gox-y the below setup sounds, but I'm coming at it from a "lightning routing problem perspective", not necessarily a straight "bitcoin security perspective"...though...those ...
2
votes
0answers
16 views

What heirarchical deterministic derivation path is used for FIDO authentication on a Ledger Nano S?

What heirarchical deterministic derivation path is used for FIDO authentication on a Ledger Nano S? Does it ask for a different key each time or is it always the same key? If I connect to Google for ...
1
vote
0answers
20 views

Does Electrum reveal a wallets public key to Electrum Servers?

When Electrum Bitcoin wallet queries a random Electrum Server does it send the public key to the server or does it send a batch of addresses to check? For instance, after setting up Electrum Personal ...
0
votes
1answer
33 views

How does Bitcoin currently mitigate Sybil and Eclipse attacks?

What countermeasures does Bitcoin currently have in place to limit Sybil attacks (ie of full nodes [not miners]) and eclipse attacks? In particular, it seems like an important countermeasure would ...
1
vote
0answers
26 views

Bitcoin, BTC.com and monitoring double-spend attempts

I'm reading Analysis of hashrate-based double-spending article. On page 10 there's a table listing probability of successful double-spend attack in relation to required number of confirmation. ...
1
vote
1answer
69 views

Wallet management now that accounts are deprecated?

I'm building a website which will allow every user to make deposits and transact with Bitcoin, how will I be able to get the balance of a specific wallet. I currently know these commands: $bitcoin-&...
1
vote
0answers
13 views

How to use Bitcoin Testnet2 [duplicate]

I am looking to mine bitcoins with ease. But, first, I want to know how can I access an earlier testnet (testnet2). I have future plans to do this. I need to know how to open it up on the command line ...
0
votes
0answers
19 views

Missing Bitcoin in Bitcoin Core-Qt after -Zapwallettxes [duplicate]

I had posted a similar question, but wanted to remake as I figured out some things that are not the issue. I used the -zapwallettxes command to allow me to resend a transaction with a higher fee. ...
0
votes
1answer
40 views

Consider using Bitcoin but just heard the IRS is sending tax notices to 10k plus users

article: https://www.cnn.com/2019/07/26/tech/irs-cryptocurrency-taxes/index.html My background: Good understanding of RSA cryptography, some elliptic curve, Number Theory and I am a (real)programmer ...
0
votes
0answers
27 views

Can I use an earlier version of testnet?

I am looking to mine bitcoins with ease. But, first, I want to know how can I access an earlier testnet (testnet2). I have future plans to do this. I need to know how to open it up on the command line ...
0
votes
1answer
49 views

Javascript library or code that can convert an “uncompressed” bitcoin private key to a compressed one

I forked a pretty old brain wallet generator: https://dvdbng.github.io/memwallet/ -- Currently it generates uncompressed bitcoin private keys. Is there a javascript library that can convert an ...
1
vote
1answer
31 views

How can I start bitcoind without blockchain synchronization?

Suppose I make a locked wallet with 50000 pre-generated addresses. As long as I researched, only way I can collect those 50000 addresses using RPC and "getnewaddress". Feel free to correct me. I ...
1
vote
1answer
34 views

Create a 2-of-3 multisig raw transaction

I would like to create a Bitcoin transaction with a single input and a single 2-of-3 multisig output that pays 1 BTC to any 2 of the following 3 keys: ...
2
votes
1answer
28 views

How can I fund my node in regtest?

I am fairly new to bitcoin and was attempting to setup a local test network in my machine. I am using the regtest network to create the local network. Is there a way in which I can initialize the ...
5
votes
2answers
197 views

Is there a difference between bytes and virtual bytes (vbytes)?

In an Optech newsletter, size is referred to using vbytes. Is there a difference between vbytes and bytes? If so, what is the difference?
0
votes
2answers
49 views

Mining Probability

Assuming two miners have a (1/x) chance of finding a block over some time period, is the probability of both miners finding a block within that period simply (1/x^2)? More generally, would n miners ...
0
votes
0answers
32 views

Mycelium not reading segwit bech32 (bc1) addresses from a private key

I'm trying to import my bitcoin private key into the Mycelium android wallet, but it keeps showing up as the legacy address that starts with 1xxx. I sent some coins to the bc1 address and I verified ...
0
votes
0answers
12 views

how to convert protobuf wallet format into private keys

firstly, i did this step "enc -d -aes-256-cbc -a -in bitcoin-wallet-backup > bitcoin_decrypted" in openssl and entered the password it gave me org.bitcoin.production so i guess my password worked and ...
0
votes
1answer
31 views

Which BIP describes the structure and algorithm for creating a wallet file?

My app is able to create a public and private key from BIP39. The uncompressed private key is concatenated with a sha256 (private key) and then encrypted via AES and saved to a file. To decrypt, you ...
0
votes
0answers
24 views

recovering android wallet using opensll

i am very frustrated, i managed to decrypt the backup file by doing the opensll command and as expected after putting the password i do see org.bitcoin.production which means i am at the right path ...
0
votes
1answer
33 views

Post Bitcoin mine reward: Lowering Difficulty an Option?

Maybe my understanding of blockchain, and Bitcoin need to be refined and will allow help me understand why my question wouldn't make sense in the grand scheme. But first Ill establish my core ...
0
votes
1answer
55 views

Who is a first miner that receive a transaction from end-user?

This is a First Question. As you already know, the blockchain like Bitcoin, Ethereum is a software program based on peer to peer network system. so I am wondering that who is a first miner that ...
1
vote
1answer
27 views

Running bitcoin node with already verified blockchain

I'm following this guide https://stadicus.github.io/RaspiBolt/ to setup a bitcoin full node on my new raspberry pi. I already downloaded and verified the blockchain on my host machine. I also pruned ...
1
vote
1answer
37 views

Hardened address generation with BIP44 watch-only wallet with xpub

I am puzzled by the hardened key derivation from a watch-only BIP44 wallet. Let me first explain what I am trying to do. I am implementing a 2-of-3 multisig scheme I am using Bcoin node and wallet ...
0
votes
1answer
56 views

Creating a nothing-up-my-sleeve public key

I am trying to create a public key whose x starts with "34" and is followed by the minimum number n such that the concatenation of "34" and n is the x of a valid point (x, y) on the elliptic curve ...

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