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5 views

get block for minin in script

I am need help for write mining python for BTC ETH and other coin. I am connect to pool port. port used tcp stratum protocol. okay whats process reqeive and send block?? and python block decoder hash.
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0answers
16 views

Which bitcoin transactions contain child pornography?

I am setting up an Electrum server, but I noticed that the blockchain contains child pornography. I don't want to distribute such unethical data. What are the transaction IDs of such transactions, ...
0
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1answer
9 views

Are multiple parents/children possible in a block?

I always learnt/thought bitcoin blockchain is like a linked list and it can have only one parent and one child at max
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0answers
11 views

Am I misunderstanding shorting a currency in which I hold collateral on?

I want to know if I misunderstanding shorting a currency in which I hold collateral on? In my margin account I have 1 BTC I short only 4 BTC on BTC/USD even though I am allowed up to 10x (The ...
0
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1answer
13 views

I have to move homes, so my Bitcoin/Lightning node will be offline for around 1 day

I have to move homes, so my Bitcoin/Lightning node will be offline for around 1 day. What happens in this case to my Lightning channel? Will I be penalised for being offline by the system? How should ...
1
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0answers
20 views

How to make a block given transaction ids, fee ,weight, possible parents

I have a list of transactions in this form 6c665f1d784d2032a13fa0986f08a3306bb1a4430049787cb1b692ed0d5d9bde,302,1136,cbf57b4e77708a6d920a63e9584cb482b03c42374b6a49e6057170a9354a89c5 txid, fee, weight, ...
1
vote
1answer
10 views

Does got any optimise method can swap/splice/loop channel without on-chain cost in lighting node?

if I got custom Node and Alice has 3btc and bob got 0btc and bob got 0btc with Tom 1 btc. Is it possible we can change channel for Alice 3btc with Tom 1 btc. And close Tom. And it doesn’t go to on-...
0
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0answers
15 views

Bitcoin-qt refuses any local miner's connections

I compile bfgminer like so: ./configure --enable-cpumining make I run it like this: ./bfgminer --cpu-threads 3 --algo c --generate-to 1Fasdfasdf --url localhost:8332 -u rpcuser -p rpcpassword ...
1
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1answer
12 views

convert from public address format to raw transaction format

So I am trying to full understand how to decode transactions. In the dev docs it discusses a raw transaction: https://developer.bitcoin.org/reference/transactions.html in the paragraph "TxOut: A ...
1
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1answer
41 views

signed raw transaction does not conform?

I have become fairly familiar with constructing raw transaction. One thing I can't understand is after a raw transaction comes back from a signing, it doesn't look like it conforms to the transaction ...
2
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2answers
32 views

How many BTC transactions happened in 2019?

I'm interested in a comparison between different blockchains and payment networks. Bitcoin has a block time of around 10 minutes, so there should be roughly 52,560 blocks in one year. However, the ...
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3answers
55 views

Why there are so many miners, if only one will be rewarded?

Why do we need so many miners, if we anyways only can add one block every 10 minutes? I mean if the current block height is x and we now need the block of height x+1 only one miner will be rewarded ...
2
votes
1answer
54 views

How to accept donation correctly?

Imagine a web page that wants to accept Bitcoin donations. A naive approach is to provide a single address on the page and that's it. The problem here is that the address is known to everyone and if ...
1
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0answers
12 views

Is there a way to avoid sendtoaddress from “sweeping”?

I have a wallet that has several hundred small amounts residing at multiple addresses. I noticed yesterday that, when sending a relatively small amount to a third party that the bitcoind "swept&...
0
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0answers
14 views

Are many nodes in the network trying to find a proof of work for the same block of transactions? [duplicate]

If two nodes in the bitcoin network receive the same transactions and now both are trying to find a proof of work of the current block, wouldn't this be inefficient? Because presumably both nodes are ...
-1
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1answer
47 views

Other than being cryptographically correct, is it the case that bitcoin meets none of its objectives? [closed]

I am sufficiently familiar with what it takes for something to be a currency. This is not a question about whether bitcoin is money, this question is exclusively about whether bitcoin meets the ...
5
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1answer
147 views

Where are transaction fees specified?

I've recently looked up the exact format of a transaction and came up with this (source with explanation): However, this seems not to include transaction fees. Are they not part of the transaction? ...
5
votes
1answer
49 views

Will P2TR make P2WSH obsolete?

Assuming users have upgraded their wallets to handle P2TR outputs and trust the validation rules of P2TR, would there be any advantage of using P2WSH over P2TR?
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0answers
53 views

Can UTXOs lifespan be predicted?

I've originally out the Q here https://mathoverflow.net/questions/395108/can-the-same-dataset-be-described-as-chaotic-pareto-power-law-distribution Because I believe the most specific opinion should ...
1
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1answer
90 views

Bitcoin Core Onion Service created unexpectedly

Why is Bitcoin Core onion service created when I have not mentioned anything related in bitcoin.conf? bitcoin.conf in Windows (data directory): prune=2048 bitcoin.conf in Fedora (running bitcoind) ...
0
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1answer
33 views

What is the chance to recover an 8 character wallet password?

I found an old BTC wallet. The password should have about 8 characters but forgot it unfortunately. Is there a realistic chance to recover it or is this hopeless?
0
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1answer
69 views

Why isn't Bitcoin using PoS instead of PoW? [duplicate]

I have read that Proof-of-Stake is way more energy efficient than Proof-of-Work mining. Is there any reason why Bitcoin is not using Proof-of-Stake instead of Proof-of-Work?
1
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1answer
19 views

How to find the secp256k1 api?

I want to use the secp256k1 library https://github.com/bitcoin-core/secp256k1 (or, more specifically I want to use the python wrapper https://github.com/electrumsv/electrumsv-secp256k1). I have a ...
0
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0answers
11 views

LevelDB checksum mismatch. How to start reindex from corrupted .ldb again?

I faced the problem twice in 2020 and the reindexing takes 2-3 weeks without stopping. I got the same error on another hard drive when it reindexed about 50% and got an error in the last .ldb file. ...
3
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0answers
26 views

Creating a complex raw transaction

I'm using createrawtransaction to get a complex transaction of 2 inputs and two outputs as discussed here: https://developer.bitcoin.org/examples/transactions.html bitcoin-cli -regtest ...
0
votes
1answer
12 views

How do I obtain a checksum for a Taproot descriptor so that I can import it using importmulti?

I tried to import an example Taproot descriptor using bitcoin-cli importmulti tr(c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5,{pk(...
1
vote
1answer
24 views

P2TR: Is pub key hashed in address?

Are the new Taproot addresses (SegWit v1) also a hash of the (potentially tweaked) public key, or is the public key directly encoded into the address, without hashing it?
2
votes
1answer
65 views

How do the fees for taproot transactions compare to P2WPKH?

How would the most basic taproot transactions (not involving scripts) compare to P2WPKH transactions in terms of vbytes or fees?
3
votes
1answer
49 views

Are the witnesses segregated with Schnorr signatures?

SegWit fixed transaction malleability by just moving the signature out of the block of data that's being hashed to form the transaction id. However, Schnorr does not suffer from signature malleability ...
2
votes
0answers
16 views

Possible amount of signatures with MuSig

With MultiSig, up to 20 signatures may be used in a treshhold signature scheme (What are the limits of m and n in m-of-n multisig addresses?). As far as I understand, there should be no hardcoded ...
4
votes
1answer
26 views

How are derivation paths stored and regenerated for HD wallets?

HD wallets create derivation paths for generated keys. But if you need to regenerate these keys with your seed or master key, where do you get the derivation paths? I don't see how they can be stored ...
1
vote
1answer
24 views

Y coordinate of PubKey on elliptic curve prefix

Public keys in the form of 04[x,y] can be compressed since the x axis is symmetrical. Hence we only need the x-coordinate with the 02/03 prefix which states if Y is odd or even. I don't understand the ...
2
votes
1answer
25 views

Can I merge blockchain downloads?

I downloaded the most recent 15GB of the Bitcoin blockchain. But I also have a back up from a year ago when I downloaded some more. Can I merely copy the old blockchain files into ~/.bitcoin and have ...
1
vote
1answer
26 views

Payout address format has changed?

When I run bitcoin-qt, it sets up a default wallet. When I ask it for the recipient address for this wallet, I was expecting something like 1FGasdfasdfasdf123asdfasdf. However what it actually ...
0
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1answer
17 views

Creating multiple bitcoin receipt wallet

Suppose I want to send 10 000 sats to 10 different "receipt" address so that I own the 10 private keys associated with these addresses and can distribute them, the fact that the receiver ...
0
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0answers
27 views

How can try CPU mining, just as a benchmark of CPU performance?

I don't care about profitability even in the least. I just want to try CPU mining as a benchmark. I compiled bfgminer with CPU mining enabled (via ./configure parameters) however when I try to run it ...
0
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0answers
25 views

complete bitcoin script example

I am trying to learn how to write my own script from scratch. I have seen about a dozen examples by googling but non of them are complete. I am aware of btcdeb as well. Is there a tutorial that covers ...
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0answers
33 views

I did a transaction of $618.57 to this wallet 18s2FVwh41Re1SDVE7UdsWVEUdFdPEVsmp since the 30th of may it hasn't been confirmed help me check it pleas [closed]

Help me out its 12 days already and I'm yet to see it have tried my best since 30th please GEt back to me I have tried using the block chain explorer and it has been confirmed there but not seen yet
0
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1answer
17 views

Is ECDSA signing supported from within a Taproot tree or must all signing be Schnorr?

Let's say a server is set up to do ECDSA signing and you want to include the requirement to provide a ECDSA signature within your Taproot tree (script path). Is this supported?
0
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1answer
10 views

Where does a single script go in the Taproot tree of a script path spend?

If I only have a single script for the script path does the hash of the script get placed at the top of the Merkle tree (instead of the effective Merkle root) or does it get placed in level 1 of the ...
1
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0answers
10 views

Is it possible to announce several IP addresses for a single lightning node according to Lightning protocol specs?

Is it possible to announce several IP addresses for a single lightning node? The idea is to run a node that is connected to different ISPs to increase its uptime. LND seems to able to run in a cluster ...
2
votes
1answer
28 views

Are a new set of keys created for each UTXO, or can multiple UTXOs be locked by the same PubKey?

I understand that each transaction, new pairs of keys are generated, usually derived from a master key say in an HD wallet. If your change for a transaction or received BTC Is in multiple UTXOs, are ...
0
votes
1answer
24 views

What wallet support for Taproot will be included in Bitcoin Core v22.0?

What wallet support for Taproot will be included in Bitcoin Core v22.0? What will I be able to do and what won't I be able to do using the Core wallet?
0
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1answer
20 views

Understanding transaction input and ouput

The definition of bitcoin transaction input and output that is there on the web is: Input = address from which money was sent, Output = address to which money is received 1. But when I looked at one ...
0
votes
0answers
17 views

Number of nodes in PBFT protocol [closed]

If there are atmost 10 malicious nodes in blockchain can exist at any time. The PBFT protocol requires 3f + 1 nodes to tolerate up to f malicious nodes, the admin A wants to have exactly 31 nodes in ...
0
votes
1answer
20 views

Appending txns to merkle tree on PoW efficiency, true hash rate

As I understand, when miners add transactions to their candidate block from their mempool, they append the txn to the merkle tree, which requires more hashing, as well as the hashing/maths involved ...
0
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1answer
17 views

Estimate of Bitcoin payments

I am reading there are a number of shops accepting BTC as payment. Is there any publication, estimate or lower bound on the amount of payments that were made to 'shops'? I won't mind if the definition ...
1
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0answers
23 views

Why is my transaction stuck? Buying over 650$ worth of btc [duplicate]

My transaction seems to be stuck im not sure why, made the payment around 7am and its now 6 in afternoon. https://blockstream.info/tx/9da37dc771e17d804c1d2695b1409a862b9016dc74326ce15daaaf1adc2a7b59 ...
0
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0answers
24 views

Is it any coin where QR code reading is standardized? [closed]

I am looking for a coin which satisfies the following 3 condition: It is popular, part of the top 20 coin Transaction is cheap, transation fee is some cent All wallet uses this coin has a universal ...
2
votes
1answer
32 views

Can Lightning work without the “network” part?

Let's imagine a minimal version of the Lightning network with a single "central" lightning node (say a service provider which we can call a Server) surrounded by thin clients (the actual ...

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