All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
12 views

Unconfirmed btc transaction-need help

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 ...
5
votes
1answer
39 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
14 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
17 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
95 views

Can we shutdown a 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 a blockchain be shutdown by shutting down power supply across the globe? What ...
0
votes
1answer
22 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
23 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
31 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
23 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
37 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’...
4
votes
1answer
68 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
18 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
31 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
27 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
33 views

Exaggerating portfolio returns [on hold]

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
27 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
12 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
46 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
17 views

solidity programming related query [on hold]

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?
14
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
26 views

Which wallets support double spending?

Which wallets support double spending? i.e. cancelling a transaction with 0 confirmations by using higher fees
0
votes
1answer
19 views

Metamask-like web3 inject for bitcoin

Is there a browser extension that works similarly to Ethereum's Metamask? I am wondering that if there isn't one, is it because of some technical limitation, or that just no one has gotten around to ...
-1
votes
1answer
49 views

buying bitcoins with debit cards that are not mine

I have a couple of cards that are not mine, I have all of the card holders info and card info. I want to purchase bitcoins and then transfer them to other wallets. I have a couple of friendswho want ...
1
vote
1answer
48 views

Whose to stop the coinbase devs from just draining all accounts and running of with the money?

I have been wondering, what would happen if the coinbase developers agree to drain all the funds of all their accounts and run off into hiding? Its not like anybody will be able stop them or return ...
0
votes
1answer
42 views

How to import address to a wallet which runs in pruned mode

I am running Bitcoin Cash node with prune=99000 mode enabled. So, I tried to import addresses of BCH from another BCH wallet by using importprivkey method and I am getting an error: Rescan is disabled ...
1
vote
2answers
65 views

Can a blockchain's transactions be reversed?

Blockchains are often described as 'immutable' (meaning the history cannot be rewritten after the fact), but is this really true? How easy is it to change the history? I have read about the Etheruem ...
1
vote
1answer
24 views

How much time does it take for a Lightning node to forward an HTLC?

How much time passes between the moment an intermediary node receives an HTLC and the moment it forwards if to the next hop? At least what order of magnitude is it? Is it comparable with network-...
0
votes
1answer
35 views

Is OP_RETURN dangerous for Bitcoin?

Please explain something about OP_RETURN to me? https://bitcointalk.org/index.php?topic=1166928.0 I saw a discussion that the contents of OP_RETURN can open the value of access to the private key. I ...
1
vote
1answer
21 views

What would be the effect on the number of leading zeros hash generation if bitcoin increase its nonce size from 32 to 60 or 100 bits?

If Bitcoin increases its nonce size from 32 bits to double or triple the size, how will it affect the speed of getting the right hash with the required number of zeros?
1
vote
1answer
165 views

How to create a bitcoin transaction without inputs

How can I create a transaction without inputs and it will be broadcasted but of course won't get confirmed? I would like the simplest method to do this
0
votes
1answer
17 views

Can two bitcoin transactions from a Segwit address (p2sh-p2wpkh) have a reused R value?

Good day. I'd found these two transactions: https://www.blockchain.com/es/btc/tx/2b08d658045724aba40b58690ad84ec2af1f01ab58df37387dadd2b27789f44c and https://www.blockchain.com/es/btc/tx/...
1
vote
1answer
39 views

How to programmatically send Bitcoins without requiring a local copy of the blockchain?

I'm quite new to Bitcoin development! I've seen the documentation about RPC commands, available when you have a local copy of the blockchain. But I'd like to know if it's possible to create and ...
0
votes
1answer
38 views

Bitcoin i have been asked to send money for a private key [duplicate]

Hi i have been asked to send money for funds that are nonspendable to receive a private key to unlock it, it's from bitcoin investing. How safe is this as i'm worried i wont receive the payment. It's ...
3
votes
3answers
76 views

Don't miners control who is allowed to make transactions?

Simple question really, considering theres a very small group of miners controlling the chain ATM. Whats to stop them from being forced by the goverment to disallow certain transactions or just mining ...
1
vote
1answer
39 views

How to Pay to Multisig Wallet Using python-bitcoinrpc?

How do I pay to a multisig wallet? I am using the Python API (based on python-bitcoinrpc) that ships with the bitcoin source code, in directory bitcoin/test/functional. I'm using regtest. I call ...
-1
votes
0answers
16 views

Can someone please list apis to get UTXO for bitcoin testnet address, which are reliable? [on hold]

Need UTXO for tx.addInput() of transactionBuilder library
0
votes
2answers
33 views

Who store seed phrases data

Seed phrases seem to be pretty secure, approximately as strong as bitcoin private key according to this site https://en.bitcoin.it/wiki/Seed_phrase. But who store the private key adresses of these ...
4
votes
1answer
340 views

Should I verify the Bitcoin Core release signing keys?

I have been running Bitcoin Core on an old Macbook for about a year, and I updated to v0.18.0 a couple of months ago which I downloaded from bitcoin.org. I have recently been delving deeper and I ...
0
votes
1answer
16 views

Learning to trade iOS user friendly crypto wallet safety when stored in and transfer for trading or use to purchase or get cashed

iPhone users best crypto wallet in bitcoin currency trading and transfer for easy access to use and keep safe deposit and profits as a new and first time trading experience to the trading crypto ...
1
vote
0answers
24 views

Cannot call rpc api from other machine in same local network

cannot call rpc api from other machine in same local network There is a regtest node in my local network , I can call rpc api only from the node's machine,not my local machine. I know rpcallowip is ...
0
votes
0answers
9 views

Coinomi is giving an error message “no funds in wallet” which mycelium while sweeping for bitcoin cash?

I am trying to extract bitcoin cash from my old mycelium wallet. I created private keys using a website someone posted here. When I tried to sweep those keys for my cash it gave me an error message ...
-1
votes
0answers
21 views

Coinbase support [on hold]

Does anyone have a better way to communicate with coinbase customer support? Like a phone number? I really don't want to through shade but it's unbelievably bad. Any suggestions.
-2
votes
1answer
31 views

ED25519 HD wallet? [on hold]

https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki What changes are needed to set up a ED25519 based HD wallet, for example to generate Stellar addresses? I found this: https://...
-1
votes
3answers
42 views

Why do I have to deposit BTC as missing turnover

I accidently transferred BTC to a non existing wallet. The wallet is now being created and I have to activate and verify it. To activate and verify I have to deposit 4,9 BTC. Is that how it works? Why ...
0
votes
1answer
36 views

Buy small amount of bitcoin with a virtual card [on hold]

I want to buy bulk ads from Paidverts.com and the amount is accumulated to 1$ in total (excluding transaction fees), but somehow they do not accept cards as direct payment. Now I know I can't use ...
1
vote
1answer
25 views

How to transfer hash power from one pool to another

Is it possible to transfer hash power from one pool to another? If yes, how?
1
vote
1answer
18 views

Running multiple bitcoin instances on same server system

I wish to run multiple instances of bitcoind on my server to support highly read intensive RPC applications. Following links: how to run multiple bitcoind node on one server? Running Multiple Full ...
0
votes
1answer
47 views

Why is Bitcoin Core full node so slow to sync?

After 12 hours, progress changed from progress=0.533751 to progress=0.541254, less than 1% progress. $ ./bitcoind ... 0 hours: 2019-10-12T17:57:11Z UpdateTip: new best=...
0
votes
1answer
38 views

Try to migrate Bitcoin Core wallet to an HD wallet but get “St13runtime” exception

I am trying to follow these steps to migrate my wallet to an HD wallet. But it failed, the debug log has errors like this: EXCEPTION: St13runtime_error DeriveNewSeed: AddKeyPubKey failed bitcoin in ...
-1
votes
0answers
27 views

Does any one know a new coin which has a great value and it increasing day by day? [closed]

I want to buy some Crypto coin which is new in market and it's not fake. The most important thing is it's value has to be increase day by day.

15 30 50 per page