All Questions

Filter by
Sorted by
Tagged with
0
votes
1answer
7 views

Convert private key to integer

I have a random private key (compressed or uncompressed) 5HpHagT65TZzG1QDbnQCzdudnpknN7nA1SLEt4ZcxsH2SV92yqt or KwDiBf89QgGbjEmUcXPRwPuKPFnFECvJkvovGNiyjaujMCrQXy98. How do I convert this private key ...
0
votes
0answers
10 views

How does the network know if the hash provided by the miner isn't just a random hash? [duplicate]

This is probably a stupid question but if all that the miner needs to do is find a hash with a certain number of leading 0's of the block's header, couldn't they just put forward a random hash with ...
0
votes
1answer
4 views

how can i coding wallet to build exchange to client withdraw

i want to build a cryptocurrency exchange so my question how is best way and secure way to depositing and withdrawing clients ? should i use api like https://cryptoapis.io or https://www.blockcypher....
2
votes
1answer
24 views

Why doesn't the Bitcoin-qt client ask for the Wallet passphrase upon startup?

I've just encrypted my wallet.dat file using the "Settings -> Encrypt Wallet" menu option. I then closed the client and re-opened it. I was expecting to be prompted to put in the wallet password ...
0
votes
0answers
6 views

Wallet recovery history

My Blockchain Wallet Has Been Hacked By Recovery Words.and my wallet id changed How Can I Get Access To My Wallet Recovery History?
0
votes
1answer
11 views

Block validation in blockchain

if i am saying that node A is having some block (B) and other nodes X,Y,Z are wants to validate the block B than node A has to send the block B to nodes X,Y,Z. This block B contains the hash of ...
1
vote
1answer
11 views

Regarding block validation in blockchain

In mining process, miners validate the block based on proof of work or using some other consensus mechanism. Miners also validate the block. So in this validation process, miners validate only hash ...
0
votes
1answer
6 views

Loading seed coins in test mode

I'm setting up a regtest node on my Windows machine using bitcoin-qt. Here's my config: regtest=1 txindex=1 server=1 [test] rpcport=8332 rpcuser=ulu rpcpassword=*** Next, I would like to run a ...
0
votes
1answer
22 views

bitcoincore additional questions

Following up from my previous question, I still have some questions left. Does it really work if I turn off the internet before doing getnewaddress? Will it really give me something real and can get ...
1
vote
0answers
25 views

Can I cash out Bitcoin without proof of provenance?

I have around 25 BTC from back when Bitcoin was around 10$ or lower. At the time, a friend sent them to me and I never thought they would ever be worth much. Since that time, I've moved them around ...
0
votes
1answer
22 views

Convert EC PRIVATE KEY from .pem into WIF

I have a openssl generated private key in the following form: $ cat priv.pem -----BEGIN EC PARAMETERS----- BgUrgQQACg== -----END EC PARAMETERS----- -----BEGIN EC PRIVATE KEY----- ...
2
votes
3answers
73 views

Does merkle root contain hashes of transactions from previous blocks?

Every block in a blockchain contains merkle root value. So for any block, there is some list of transactions and you create a merkle tree based on these transaction. For other blocks, same process ...
0
votes
0answers
16 views

How does proof of work works? [duplicate]

I am wondering how POW calculation is working ? Is it basicly a hash brute force ? So it is based on probability and luck for miners ? Thanks
0
votes
1answer
20 views

Should we wait 10 minutes to confirm a transaction

I have read this proof of work calculation takes about 10 minutes. That mean people who are making the transaction should wait 10 minutes ? Let's imagine i want to buy a drink with bitcoin. The ...
0
votes
1answer
20 views

Mining operation calculation

My goal is to understand bitcoin. I have read what happens during a transaction and have a question about it: When a transaction happen, the miners compute a value called "prof of work". This value ...
0
votes
1answer
26 views

How can i enable mining

My goal is to understand bitcoin. I do not want to earn money with mining. I have a server without GPU (intel i5 with 4 cores) Here is what i've done: I have downloaded, maked and installed bitcoin ...
1
vote
2answers
31 views

Fetch my private key

I goal is to understand. I do not want to earn money with mining. (I have a server without GPU) Here is what i've done: I have downloaded, maked and installed bitcoin sourcecode from github. It ...
0
votes
1answer
41 views

bitcoind and bitcoin-cli and bitcoin-qt

following the hackernoon for full node btc, https://hackernoon.com/a-complete-beginners-guide-to-installing-a-bitcoin-full-node-on-linux-2018-edition-cb8e384479ea i have some small questions, is there'...
0
votes
0answers
24 views

What is the purpose of difficult in PoW

I'm trying to understand Proof of Work and something doesn't seem to fit, First, it seems to me that the faster the network can confirm a transaction, better is. I'm coming from a computing ...
0
votes
0answers
13 views

MacOS: How to run Bitcoin Core GUI after building from source?

I built Bitcoin Core from source by following this guide: https://github.com/bitcoin/bitcoin/blob/master/doc/build-osx.md And got it running on the command line via: ./src/bitcoind Screenshots from ...
0
votes
1answer
15 views

A question about transaction broadcasting and block creation

Let's say we have transaction X and transaction Y. The timestamp of X is chronologically earlier than that of Y. X's spender broadcasts X to the network and the same goes for Y's spender. Let's say ...
0
votes
0answers
9 views

How to transfer Bitcoin to AuD

How do I transfer my Bitcoin into AUD and my bank account or who is a good broker or company to organise it please I have a substantial amount of Bitcoin to transfer to my bank it is in block hash ...
0
votes
1answer
26 views

Understand how wallet works

My goal is to understand the bitcoin internals. Here is what i have done: I have downloaded, maked and installed bitcoin sourcecode from github. I have launched the bitcoind daemon. Everything ...
-1
votes
0answers
42 views

Please help me get back my bitcoin

Please I need serious help ,I sent a bitcoin to an address only to wake up to see a different address ,instead of being sent it shows transferred to a zero recipient ,please I need to rectify this
0
votes
0answers
17 views

How do lightweight nodes and SPV wallets calculate balances?

Can they do it? Or they "talk" to a full node for that purpose and are used only for mining purposes? Thanks in advance for your answers.
0
votes
1answer
12 views

bitcoin node startup daemon with created wallet

When I restart the Bitcoin node, I would like to load the wallet I created in the "wallets" subdirectory. bitcoin-cli createwallet "1" bitcoin-cli listwallets -> result : "", "1" bitcoin-cli -testnet ...
1
vote
2answers
16 views

Organization to keep track of wrongfully obtained bitcoins

I am curious whether there are any organizations that are actively trying to monitor bitcoins from illegal sources. I understand that 'when done properly' you can make bitcoins practically ...
1
vote
1answer
14 views

How does a Lightning transaction work if one party starts with no Bitcoin and no wallet?

Let's say Alice wants to give Bob 1₿, and Bob doesn't have a regular blockchain wallet address yet. The classic example assumes that Bob is locking some Bitcoin of his own on the blockchain, and ...
0
votes
1answer
13 views

QR Scan “Unrecognized format” mycelium "Mastering Bitcoin'

Noobie here. In Ch. 2 of Antonopoulos' "Mastering Bitcoin", I try to scan figure 2-2 (per his instruction) using a recently installed Mycelium on my Android. Why do I keep getting "Unrecognized ...
0
votes
0answers
8 views

Bitstamp and deposit address

I have a Bitstamp account and when I try to use the API for bitcoin deposit I discover that there is a unique address for my bitcoin deposit. It is safe in term of address reuse consideration ? Here ...
0
votes
0answers
22 views

I invested $300. In Bitcoin on Feb 20, 2019 [on hold]

I invested $300. in Bitcoin on Feb 20, 2019. I would like to know how much my $300. has gained? I wish I could understand the calculations, but a simple answer would do. I am not good with math. Thank ...
0
votes
0answers
11 views

How to get a list of addresses from all zcash transactions? [on hold]

I have a downloaded blockchain in zec wallet, how can I get all addresses from all transactions from it? How to read ~/.zcash/blocks/blk***.dat and ~/.zcash/blocks/rev***.dat files?
0
votes
1answer
17 views

A question about Proof-of-Work(PoW)

I will describe my question using an example. Let's say the network is working on adding block #100 to the blockchain. An attacker recreates block #99 with a combination of transactions that are "...
0
votes
0answers
14 views

Any Doge Testnet coin available for testing [on hold]

i m testing on doge coin ... i needed doge coin. the link ( https://doge-faucet-testnet.ggcorp.fr/ ) not working for my addresses :- noKnYysXng45hui8gtCt5mgxNcBrHpxETm ...
0
votes
0answers
12 views

Can Omni transaction contain multiple transfers?

I want to create a transaction for USDT on Bitcoin blockchain that sends 99% of USDT balance to user A and 1% to service as a fee. I am checking what Omni layer is capable of and I kinda got how it ...
2
votes
1answer
11 views

How run c-lightning with the local node bitcoin

I have a bitcoin-core-18.0 with on my linux mint, and I don't have downloaded the bitcoin with the ppa but I downloaded the official zip directory on site bitcoin. Now my question is, c-lightning ...
0
votes
1answer
44 views

Transferred bitcoin to an address and it showing transferred to another address instead of sent ,and it showing zero recipient

I transferred bitcoin to a friend yesterday and it showed transferred this morning to an unknown address and it showing zero recipient a
1
vote
1answer
21 views

Transaction malleability

I have been reading about transaction malleability a lot still doesn't make sense to me. Is there a script I can use to test it out ? If the transaction that is malleable is changed by the attack, how ...
0
votes
1answer
21 views

Save state to the disk at abrupt bitcoind shutdowns

I have a bitcoind running, and after new blocks being synced, sometimes I kill it(without stop command). Next time, when I start it, it goes through already synced blocks. Is there any way to force ...
0
votes
1answer
12 views

using rpccookiefile instead of username and password for antminers

I mine using username and password at the moment but as bitcoin core is changing over to rpccookiefile. My question is, if i use rpccookiefile how do i point my antminers to my local bitcoind 'pool' ...
0
votes
1answer
46 views

Cheap way to attack the bitcoin block chain [on hold]

Just for educational purpose but might come in handy sometime, what is the cheapest way to attack the bitcoin block chain? is it possible for a block with at least one confirmation to be orphaned ...
0
votes
0answers
11 views

BNB - transaction hash derivation

I'd like to derive a tx hash, but i can not find documentation about it given a transaction, lets say block 28973905 (which has one transaction) https://seed1.longevito.io/block?height=28973905 How do ...
0
votes
0answers
14 views

Bitcoin Core Question, Initialization Vector

I am reviewing Bitcoin Core source code. I am following the code which states take a double sha 256 of the public key to get the IV and use the master key for the encryption key for encrypted wallet....
0
votes
4answers
38 views

A question about full nodes, lightweight nodes and merkle trees

What is the purpose of full nodes storing merkle roots? Why don't they save the transactions only? The hashes could be calculated only when a lightnode asks for them and the merkle roots could be ...
0
votes
0answers
22 views

What is the complete process and purpose of a block validation using merkle trees?

I need the whole details please. Like does that happen only in the current block? Or at past blocks do? And how exactly does this happen? Do full nodes send the proper hashes and then a local ...
0
votes
1answer
13 views

Question about Merkle trees and blocks

There is something I cannot understand about Merkle trees. I understand how they are calculated and etc., but I cannot understand how they are used on a blockchain. If a block stores only the Merkle ...
-2
votes
0answers
16 views

Which of the following bitcoin scripts will generate a TRUE outcome?

i) scriptSig: <sig> scriptPubKey: <pubKey> OP_DUP OP_HASH256 <pubKeyHash> OP_EQUAL OP_VERIFY OP_CHECKSIG ii) scriptSig: <pubKey> scriptPubKey:...
0
votes
0answers
6 views

Got problems with margin's bots [on hold]

I'v downloaded cryptocurrency trade terminal&bots "margin"(https://marginsoft.host) and faced the automatic trading bots set up problems. FAQ did not help. Margin works correctly, all features ...
0
votes
1answer
14 views

bitcoin core problem payment

I downloading bitcoin core on my computer. But my computer is full, and downloading is not complete. I made transfer my bitcoin to URI on bitcoin core, which downloading. But nothing came and I didn't ...
0
votes
0answers
13 views

difference between extended public-key(xPub) and public-key

I wanted to know the differences between the public key and extended public key and their use cases.

15 30 50 per page