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1answer
7 views

How do miners determine if a wallet has sufficient funds

I have ready about 10 posts that are similar and none of them seem to answer my question so any help is appreciated. My question is how to miners technically determine if a "wallets" has the "...
0
votes
0answers
4 views

Longest unconfirmed transaction?

I recently tried to make a transaction with coinbase. In a hurry I put no fee though. It's still unconfirmed and blockchain.info doesn't recognize my hash. But my btc qt wallet is debited. My question ...
5
votes
1answer
215 views

What are the downsides of Hodl Invoices?

As far as I understand hodl invoices enable some interesting use cases. However, I heard that they can be detrimental to the network. Is that correct and in what way? Additionally, at a talk at the ...
-4
votes
0answers
32 views

Please deposit btc [on hold]

I transfered money from my wallet bc1qf2m0sh7cq6m6p4wqjngg72c2vyh96f4glmug0y, But when I check the TXID in www.blockchain.com/explorer, I can not see my wallet number. For now my transaction was ...
0
votes
1answer
28 views

Is there a way to delete a test wallet without stopping bitcoind?

For my unit tests, I'd like to be able to delete and recreate a wallet without having to stop bitcoind and manually deleting the wallet directory. When I try to delete such wallet directory without ...
-1
votes
0answers
21 views

I have a transaction I. D. Number/receipt sent to me via email. How do i collect my money payment? [on hold]

Can I received step by step instructions on how to collect my payment when I have my transaction id number?
1
vote
1answer
45 views

What is the simplest command I could use to test that my wallet unlocking process works properly?

I simply want to unit test that my lock/unlock process works well on an encrypted wallet. What would be the easiest command I could send (that doesn't involve sending coins) to actually validate if ...
0
votes
0answers
17 views

Coinbase customer service [duplicate]

Does anyone know how to get a hold of a human being on the phone at coinbase? Or the contact info of a good crypto lawyer? Their customer support is lacking. I have a stuck transaction going on two ...
2
votes
2answers
1k views

Transaction with highest fee, but stuck, what did I do wrong?

I recently sent btc that appears to be stuck (https://live.blockcypher.com/btc/tx/c131d65d933e343f852021830b833123de952c1857f264503388cf642655c457/) The interesting thing is that I used a higher fee (...
1
vote
1answer
20 views

Backup of a bitcoind wallet using the extended private masterkey only

If I understand correctly, bitcoind makes use of a extended private masterkey in order to deterministically generate private/public keys for a wallet. Using the dumpwallet command, I'm able to get ...
1
vote
0answers
11 views

Connecting to local copy of blockchain with NBitcoin

So I finally got Visual Studio Code and NBitcoin installed and setup on Linux. How do I connect to my own copy of the blockchain and perform queries using NBitcoin? I have a full node running and it ...
-1
votes
0answers
11 views

Litecoin Mining Pool without Dogecoin? [on hold]

I want to mine Litecoin (I don't have the hardware to do it, but I just want to get more litecoin because I expect its value to rise in both dollars and thousandths of bitcoins in the long term), but ...
1
vote
1answer
37 views

How to tell if a transaction is valid?

So I have been reading up on bitcoin and blockchain for awhile now, but I have yet to fully understand it. I understand that bitcoin leverage on DLT, which uses cryptography to verify transaction. ...
2
votes
1answer
34 views

Local balance query for Bitcoin address

I would like to be able to query the balance of an address (not belonging to me). The data should come from a fully synced bitcoin full node inside the local LAN and I do not want to query any api ...
0
votes
1answer
21 views

what is the most suitable time interval for updating information on a block while mining the block

So, Bitcoin block consists of some static (magic number, version, previous hash...) and dynamic (timestamp, Merkle Root, transaction count and transactions) elements. What I don't understand is if we ...
1
vote
1answer
21 views

How Does Bitcoin Core Client Keep Track of Longest Chain/Strongest PoW Chains?

Bitcoin Core stores blocks in files in local disk. And it uses LevelDb to form an index on top of block storage to make it faster to retrieve a block (basically a simple key-value pair db). See this ...
0
votes
1answer
20 views

Fees when withdrawing funds from bitcoin?

Does one have to pay a fee to withdraw funds from their bitcoin account into cash?
0
votes
2answers
44 views

Unconfirmed transaction. How to make my wallet made whole

I am running a node with an unconfirmed transaction. I tried shutting down my btc qt so the transaction would be forgotten. To no avail it keeps rebroadcasting the transaction. I am in the process of ...
-2
votes
0answers
19 views

Is it true that the Ripple CEO Brad Garlinghouse claims striking 30 deals a week? [on hold]

Ripple, the founding company of the top third Cryptocurrency XRP is very popular among financial institutions and banks to serve multinational blockchain remittances. Previously, ripple has ...
0
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0answers
5 views

problem of hash board in dragonmint T1

-I cleaned the 3 hash board of dragonmint T1 using blower yesterday. then I assembled them . " when I turned on the power, the light of 3 hash board in On, but after some seconds only 1 hash ...
0
votes
2answers
17 views

Imported address:private key [duplicate]

Please I want to ask how can I get the private key so to withdraw from my imported address and is it possible that you get to pay a certain amount of btc to get the private key..thanks in anticipation
1
vote
2answers
42 views

How to send zero fee bitcoin transaction

Please does anyone know how I can send zero fee bitchin transactions? I know if might not confirm, I just wanna know if there are any wallets or sites or softwares that I can use to accomplish this.
0
votes
1answer
23 views

How can I extract my bitcoin public address from my bitcoin private key using PHP for Nodejs?

I'm building out an application, but I need to verify if the bitcoin private keys have a positive balance. Is there a PHP script or some type of service that I can pass in a private key and outputs ...
2
votes
1answer
69 views

how difficult is it to generating an ECDSA (or Schnorr) signature with a certain number of leading zeros?

If both the public key and the private key are known ahead of time (public knowledge), and the goal is to choose a message/nonce that generates a signature with, for example, a certain number of ...
0
votes
0answers
11 views

Cannot push rawTX consecutively?

When I use the blockcypher's api or the bitcore's api to push rawtx, I can only send successful transaction the first time. If I send the next transaction immediately, I will receive an empty return ...
1
vote
0answers
15 views

How does lnd make sure it does not reuse the same route twice for a retry after the first payment failed?

Suppose LND node A wants to send a payment to another node D. The pathfind algorithm based on Dijkstra found a route through B and C and initiates the payment. It fails, as B -> C does not have ...
0
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0answers
20 views

How to create a Bitcoin Transaction With Protocoin

Please how do I create a btc transaction and broadcast it with protocoin library? I want to create a transaction that will relay to the node without validating inputs and outputs. Of course I know the ...
0
votes
1answer
30 views

How can I consume my whole bitcoin balance in a single transction? Is it possible to use multiples UTXOs in a single transaction?

I want to make use of a single bitcoin address for payment. I'm using bitcoinjs library's transction builder for creating my own transaction. Can anyone help with a proper code to use multiple UTXO's ...
1
vote
1answer
19 views

Understanding getchaintips in terms of chain reorganisations

I'm trying to get an understanding of the chain reorganisations my node has experienced by looking at bitcoin-cli getchaintips. The "status" of the different branches tells me the following: 1. "...
0
votes
0answers
28 views

Unconfirmed btc transaction-need help [duplicate]

Does anyone know where I can bring my btc qt to credit my wallet from an unconfirmed transaction? I tried doing a transaction with coinbase and in a hurry I put no fee. So it's stuck in the mempool. I ...
6
votes
0answers
86 views

Can we construct a UTXO which is spendable only via proof of work?

Do the current Bitcoin opcodes and transaction size limit allow constructing a UTXO which is only spendable if a specified amount of work has been performed? So the spender, would provide a nonce as ...
1
vote
1answer
20 views

How do i configure two (or more) Antminer S9s on one bitcoin.com account?

I just added a second Antminer S9 to my pool. I've been mining with one S9 and bitcoin.com for about a year. in Antminer-1 configuration I have my bitcoin username in the "Worker" Field / password "...
1
vote
1answer
25 views

Do local nodes work across crypto types?

Newbie to all of this, hoping you can help with what is probably a "duh" question. I'll keep it brief, though: if I download the blockchain using the instructions given for the Bitcoin GUI, will I be ...
3
votes
3answers
131 views

Can we shutdown the Bitcoin blockchain?

I maybe wrong but what I think is the blockchain ledger exists as long as there are active nodes in the network. So can the Bitcoin blockchain be shutdown by shutting down power supply across the ...
0
votes
1answer
36 views

Bitcoin blockchain parser windows 10 [on hold]

I am very noobie to this and I am looking for blockchain parser for windows that seriously work. I want to parse all data from blkXXXX.dat to csv for future analytic research. Please help :(
0
votes
0answers
25 views

anonymity exploits in bitcoin transactions [on hold]

I am finding deep technical papers about different anonymity exploits in bitcoin transactions. Have anybody encounter something more general about bitcoin anonymity exploits?
2
votes
2answers
43 views

How do I get the scriptPubKey type from the raw output script?

I use zeroMQ to get the transactions from Bitcoin Core. The output looks like this: { value: 200000, script: <Buffer 00 20 e3 30 7e 8e 0b 63 0e 53 c2 f1 f8 17 06 7b ce 01 c4 38 92 83 3e 02 2d ad ...
1
vote
1answer
28 views

Bitcoin backend integration - Do I really need the notion of “a wallet”?

I am developing an application that will accept Bitcoins targetting some specific "items" in my application, and later transfert some of those Bitcoins to externals addresses. In many similar ...
0
votes
1answer
54 views

Help recovering BitPay wallet Reward!

I had money sent to my wallet and couldn’t remember my encrypt password. I had my 12 word recovery phrase written down but it’s abbreviated. I deleted my wallet which I shouldn’t have done because I’...
5
votes
1answer
86 views

How can I protect my funds in the event a quantum computer breaks the ECDLP that Bitcoin relies on?

An interesting question was posted recently, discussing the idea of hashed addresses being (not meaningfully) quantum resistant. As Andrew's answer on that question points out, paying to a hashed ...
1
vote
1answer
19 views

Wallet, deposit and withdrawal management system used by HYIP etc

I've seen many HYIP (scammy) websites and they all look the same. Despite the scammy part of them, what I like of those websites is that they accept deposits in different currencies, BTC, ETH, XRP, ...
5
votes
0answers
45 views

Are there any “slow” sidechains? What are the tradeoffs?

Are there any examples of sidechains which target a block time much longer than bitcoin? Could a sidechain be made "slow enough" such that the size of a proof (SPV proof?) for it could actually fit ...
1
vote
1answer
28 views

how do mining pools expose their stats?

Webistes like https://miningpoolstats.stream/ must communicate with the pools somehow. What protocol do they use to retrieve information such as the pool's hashrate and what blocks have been mined by ...
-3
votes
0answers
34 views

Exaggerating portfolio returns [closed]

I used to day trade on gdax for a while, but without any massive hits and an overall return (over 3 months) of around 130%. As I would like to include that I have traded cryptos on my CV, I imminently ...
0
votes
0answers
28 views

bitcoin cash and malleability

i saw the news about the protocol upgrade of bch: https://www.bitcoinabc.org/2019-08-21-bitcoin-abc-0.20.0/ there are some things i didnt understand: what does exactly the "MINIMALDATA" means? is it ...
0
votes
0answers
14 views

Using NBitcoin to send Btc in C#

I have a variable number of addresses I want to send Btc to and I have a wallet (created in NBitcoin) as the source. A couple of questions. All the examples use the fluent methodology to declare, ...
1
vote
0answers
48 views

Bitcoin Lightning Network

I created a channel in lightning network, did the payment and the channel balance of the receiver got updated. But after closing the channel , the wallet balance of the receiver is not getting updated ...
0
votes
0answers
19 views

solidity programming related query [closed]

I am learning Solidity on Cryptozombies, and while learning about structs, I've encountered that if I don't declare "String" and "uint" in this very specific order, it gives an error. Why so?
16
votes
1answer
3k views

Why does hashing public keys not actually provide any quantum resistance?

In the discussions about taproot, it was mentioned that outputs will include the public key directly instead of hashing them. It is stated that, currently, hashing does not really provide quantum ...
0
votes
1answer
30 views

Which wallets support double spending?

Which wallets support double spending? i.e. cancelling a transaction with 0 confirmations by using higher fees

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