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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?
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-...
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 ...
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 ...
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 ...
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 ...
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....
-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'...
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 ...
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 ...
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 ...
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 ...
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: ...
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 ...
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 ...
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" ...
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 ...
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?
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/...
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 ...
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, ...
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. ...
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 ...
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 ...
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 ...
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'...
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?
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 ...
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 ...
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 ...
-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 ...
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 ...
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 ...
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 ?
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 ...
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", ...
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.
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 ...
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 ...
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 ...
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? ...
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?
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 ...
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 ...

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