All Questions
28,578
questions
2
votes
2
answers
173
views
There are a lot of 100 input transactions in some blocks, what's the reason?
In block 736302, we can see a lot of 100 input transactions. And this can be seen also in 736567, 736299 and so on. Is this only a coincidence?
- 62.3k
0
votes
0
answers
6
views
Can I transfer BTC from BTC (address) wallet to a Lightning (address) wallet?
I would like to know if I can send BTC from a BTC address to a Lightning Network address.
I have BTC on an exchange and I would like to move them from the exchange to my Muun wallet. Muun allows on-...
- 1
0
votes
0
answers
7
views
How to get nft details from transaction hash?
I'm trying to get user's recent transactions and with that transaction hash I want to get the nft details (whether he has bought or sold). For this I tried nftport's api and from there I'm getting the ...
- 1
3
votes
1
answer
336
views
How to reference different wallets with curl JSONRPC requests Bitcoin core
I have a headless Bitcoin core 0.17.1 running on Debian 10, and have created a second wallet "johns-wallet".
I'd like to get the walletinfo (or any wallet request) of that specific wallet ...
- 103
0
votes
1
answer
139
views
Do Full Nodes validate all transactions and make new blocks after all bitcoin are mined?
Do Full Nodes validate all transactions after all bitcoin are mined?
A fork of bitcoin core with all coins pre mined would be behaving in this way too I'd imagine..?
Also, would these nodes still ...
- 193
1
vote
1
answer
6
views
Can I make a keysend/amp payment having an invoice?
I am trying out sending/receiving payments between BlueWallet, Muun wallets and my locally running lnd node. I managed to successfully pay an invoice generated by BlueWallet or Muun from lnd node on ...
- 3,924
1
vote
2
answers
818
views
Bitcoin curl no reply
Hi I have made a curl to my server but get no reply . What am a missing
rpcuser=rpcusername
rpcpassword=rpcpassword
rpcauth=rpcusername:generatedkey
daemon=1
server=1
rpcport=8332
rpcbind=0.0.0....
- 103
-1
votes
0
answers
15
views
I was sent money through vantagevend and ive been paying fees to withdrawal am i being scammed [duplicate]
I received 4000 in btc from boyfriend out of country. I paid 500 for a plan in vantagevend to withdrawal. As I'm withdrawing the 4k I'm told 20,000 come in also and had to buy bigger plan 1400 I ...
2
votes
2
answers
1k
views
Issue on configuring the bitcoin core build on Ubuntu-18.0.4
I am trying to configure the bitcoin core build , as I use make , I received the following issue .
~/Desktop/bitcoin$ make
Making all in src
make[1]: Entering directory '/home/fu/Desktop/bitcoin/src'...
CommunityBot
- 1
0
votes
1
answer
23
views
How do transactions get into the mempool?
I was tracking a transaction using a Bitcoin Core command. I was able to extract info on whether the transaction had entered the mempool.
Among the information I got were details such as "the ...
- 1,868
0
votes
1
answer
14
views
Will remote RPC under http expose the rpcusername and rpcpassword?
I'm confused with the examples of contacting bitcoin-cli as the examples always show sending user name:pass to http does this expose the name:pass?
This command: (I modified the help example from ...
- 82.3k
0
votes
1
answer
107
views
Prompting an account name
I made an account "hello" in bitcoin daemon and wanted to run this. Whenever i put in hello when prompted, getac1 would return empty array; whereas, getac2 and getac3 returns addresses associated with ...
CommunityBot
- 1
1
vote
0
answers
17
views
How to generate a lightning invoice of any type offline
Is it possible to generate a lightning network invoice without the encumbrance of a full lightning node (lightning node defined as: fully synced channel graph, knowledge of channel outpoints, and ...
- 1,359
0
votes
1
answer
245
views
broadcasting error for raw bitcoin transaction testnet
I am trying to create a raw transaction and send it to the testnet. I am using testnet keys and here is the simplified readable output from my script:
decoded private key: ...
CommunityBot
- 1
1
vote
1
answer
26
views
Why is the Generator Point G for secp256k1 curve typically indicated in (y,-x) quadrant?
Generator Point G for the secp256k1 curve is typically indicated below where the curve intersects the y-axis. At x=0, y=sqrt(7) and -sqrt(7), which are both small numbers less than 3, but G is an ...
- 82.3k
1
vote
1
answer
159
views
Can I use the Bitcoin Core CLI to learn the block height at which a transaction was mined?
I am interested in figuring out at what height a transaction was mined, but I cannot find the right command to extract this information. Perhaps it's not possible?
My Bitcoin Core was not involved as ...
- 62.3k
2
votes
2
answers
379
views
Double spending on testnet or regtest?
I'm currently doing a research on bitcoin and I would like to know if there is anyway to replicate double spending in the testnet or regtest? If isn't possible is there any other type of "attacks" ...
CommunityBot
- 1
0
votes
1
answer
33
views
How can I create/provide crypto currency wallets to my users?
I am interested to know, if I want to make a facility to my website users to be able to pay/buy with crypto currencies, also to gain ability to send/receive crypto currencies together( something like ...
- 17.4k
0
votes
0
answers
15
views
What is the usage of "token" that an exchange provides to it's users? [closed]
I noticed that in exchange platforms like Binance there is an Option to create a token. I am interested to know what is that and what are the usages?
- 101
0
votes
1
answer
32
views
How do crypto exchanges create wallet for their customers?
I am new in Cryptos. I noticed that when I want to trade in an exchange it needs to create a wallet on their website. It seems this is the wallet they create for a user like what he/she can create him/...
- 101
1
vote
0
answers
15
views
Which offers more privacy, coinjoin-whirlpool or non-KYC online exchanges?
After buying crypto with fiat on a KYC exchange, instead of just moving the crypto to a wallet, I understand that I should get more anonymity from tracking by putting the coin through coinjoin or ...
1
vote
1
answer
149
views
Is this scheme for multisig audit of Trezor + Coldcard ok?
My plan is to make a multisig between coldcard and trezor. I want to audit and verify that I indeed own the 2 keys of these wallets, using a raspberry pi zero (no wifi/bluetooth by definition) on a ...
CommunityBot
- 1
0
votes
0
answers
17
views
Bitcoin core fails to load
I have just loaded the Windows version of Bitcoin Core (v22). But it fails to sync with the network. At around 6 days and 5 hours I see the following:
Please note that despite 30 years IT experience, ...
- 491
0
votes
1
answer
9k
views
Blockchain wallet showing 0 however app showing balance
So my blockchain desktop wallet is showing 0 balance whoever if o go in to the app i can see my bitcoin wallet balance. When again i click on the wallet it goes back to 0 in the app for some reason. ...
CommunityBot
- 1
0
votes
1
answer
37
views
What stage of the bitcoin protocol deals (or 'solves') the double-spend problem?
I understand that a key innovation in bitcoin is that it solves a key problem faced by previous attempts at a digital currency: the double-spend problem.
In addition, I also understand that the ...
- 62.3k
1
vote
1
answer
102
views
Bitcoin P2P API getBlocks always returns 500 inv items
I'm trying to build a mini full node so that I can understand exactly how they operate. I've managed to get a few parts of the P2P api working however I am stuck with basic things like 'getblocks' and ...
CommunityBot
- 1
1
vote
1
answer
2k
views
Calculating Hardware Efficiency through Hash Rate per Second
I was wondering if any of you could help me in making my own mining calculator. I know there are many good web apps out there, but I would like to make one myself.
What I don't understand is how to ...
0
votes
0
answers
20
views
Is there a consensus as to what is meant by 'Nakamoto Consensus'?
I sometimes hear that bitcoin's key innovation was the Nakamoto Consensus, which solves the double-spend problem without the need for trusted third-party intermediaries.
I take Nakamoto Consensus to ...
- 207
0
votes
1
answer
31
views
Is it correct to refer to hashes found through proof of work as "proof of work numbers"?
I've seen come commentators refer to 'proof of work numbers'. I suppose these are the hashes found through proof of work, but not entirely sure.
EDIT** Regarding where I got the 'proof of work numbers'...
- 207
0
votes
0
answers
11
views
What is maxsigcachesize?
-maxsigcachesize= Limit sum of signature cache and script execution cache sizes to
What is this?
What is a sigcache?
What happens if it is set low and Can it have a bad effect?
- 454
0
votes
0
answers
19
views
What would make a blockchain lag 50-100 blocks behind?
Related: https://bitcoin.stackexchange.com/a/50743/14316
I am following the advice in the accepted answer to the question above. I am running a collection of coins next to each other on a server. I ...
- 454
0
votes
1
answer
43
views
Elliptic Curve and SECP256K1
Just for curiosity, considering that there is a server communicating with other machine (local machine let's call it). If we have the two public keys from Local and Server and we know that Private and ...
CommunityBot
- 1
1
vote
1
answer
45
views
Is it feasible to calculate EC private key k from public key K for very low values of k?
If an EC private key k is very small, say "1", is it feasible to calculate the private key k from its public key K, since there would only be one step back to generator point G and therefore ...
- 3,145
-1
votes
0
answers
14
views
what kind of wallet i have to use for my cryptocurrency exchange
I'm Programming a Cryptocurrency Exchange ... The Problem Is I got API From https://binance.com But I Don't Know How Generate My Wallet ... Must I Use https://binance.com Wallet Or Can I Use Hard ...
0
votes
1
answer
57
views
Transaction is not submitting using bitcore-explorers.js
I'm submitting a transaction using bitcore-explorers library of js which also uses insight services of bitcoin node and here i'm receiving the error
Please help me out from this error, furthermore ...
CommunityBot
- 1
1
vote
1
answer
640
views
Is it possible to use Electrum to create a multisig wallet with a trezor and an airgapped coldcard?
I set up a 2-of-3 multisig using Electrum, a Trezor, and a Coldcard. During testing, I ran into issues using the Coldcard to sign.
My approach:
(On Electrum) File -> New/Restore -> Multi-signature ...
CommunityBot
- 1
2
votes
1
answer
71
views
How do bonds in Secure Multi‐Party Lotteries work as described in Bitcoin and Cryptocurrency Technologies book
I have understood the details of it but I have a question related to claiming the bond.
We have two parties Alice and Bob and suppose the bond that Alice signs is
now if Alice reveals her value X ...
CommunityBot
- 1
3
votes
1
answer
303
views
Python library for Multisignature HD wallets
Is there is any python library is available that allow creation of Multisignature HD wallets ?
CommunityBot
- 1
0
votes
0
answers
19
views
Is it legal in the US to incorporate in a different state to trade cryptocurrencies?
I know this isn't specific to Bitcoin but I thought this community would know best. I live in New York where there are stringent rules about crypto trading.
I did a survey of 44 exchanges last weekend ...
- 163
0
votes
1
answer
606
views
Kucoin API buy and sell
Why, when I using Kucoin API, get_tick, for market info, I see, that sell is bigger than buy?
Example from official API Documentation:
With a symbol param
{
"coinType": "KCS",
...
CommunityBot
- 1
1
vote
3
answers
75
views
What needs to be on a USB such that you could hand it to someone and gift them a discrete amount
This may be a very stupid question. I was watching an interview with Nic Carter (https://youtu.be/mDyBbGCiBUU?t=1094). In it he gives Lex a present of a USB with $100 worth of Bitcoin. What is ...
0
votes
0
answers
22
views
most updated software in the block chain
Which one is the most updated Bitcoin client I can download from a block chain. Doesn't have to be the mainnet chain, it can be as payload of the testnet or signet chains.
- 294
1
vote
1
answer
32
views
How Does A Node Get Infomation From The TxID - that is, isn't the TxID the SHA^2(256) of various transaction components?
If I'm right, SegWit TxIDs are composed of the SHA^2(256) hash of the Non-SegWit data of a transaction. But, how does another Node use the TxID to obtain infomation about the transaction such as the ...
- 62.3k
0
votes
0
answers
7
views
How can I get an unconfirmed transaction confirmed? [duplicate]
I made a transaction and it's been sitting there unconfirmed for 2 days. How do I cancell and resubmit?
0
votes
2
answers
45
views
What does SHA256 hast must be lower than current target?
I'd like to ask if someone can help explain this definition found on https://en.bitcoin.it/wiki/Target
"The SHA-256 hash of a block's header must be lower than or equal to the current target for ...
- 111
0
votes
1
answer
178
views
SPV client TCP connection in python
I am trying to implement an SPV client in python (for my own learning). I want to start by making a simple TCP connection to a full node, but I either cannot get a response to my version message, or ...
CommunityBot
- 1
1
vote
1
answer
170
views
Following SegWit implementation, is BIP-146 signalling and implementation still on the docket?
Is BIP 146, which defines using the low S value, still on the docket to be signalled and implemented given that SegWit fixed the txid malleability issue by moving the witness outside the transaction? ...
CommunityBot
- 1
1
vote
1
answer
344
views
How to generate btc addresses from XPUB?
I have an xpub key and I'd like to generate the sequence of btc addresses in PHP based on the index.
Is there a way to do that?
CommunityBot
- 1
0
votes
1
answer
143
views
Should I use Electrum Wallet OR Bitcoin Core as my website's payment gateway?
I'm a developer who is building a website that need to process Bitcoin payment requests. So I need a payment gateway.
In my last project, I used Electrum wallet as payment gateway but my last ...
CommunityBot
- 1
0
votes
2
answers
172
views
Need help with a .conf file to run a lighting node?
This is my configuration file and i followed all of the instructions for the program but it always gives me the error message about something missing. I don't even know what programming language .conf ...
CommunityBot
- 1