Newest Questions
32,000 questions
0
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13
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Electrum wallet JSON - get WIFs or hex private keys
I am able to decode and decrypt (with passwords) Electrum wallets to JSONs.
But I need to dump private keys (64-digit hex) or WIFs (compressed or uncompressed) from these wallets.
How can I do that in ...
- 195
0
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1
answer
10
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I have transferred btc 0.0002 to my okx wallet address bc1q0pgukeeyg9nh776ft9h6t3frrfspj7la4ahcz4uzu0xn29lyra4shyuhf6 still not received
Transferred btc 0.00200000 to okx wallet
bc1q0pgukeeyg9nh776ft9h6t3frrfspj7la4ahcz4uzu0xn29lyra4shyuhf6
Still not there and on pending status.
Will it be reversed or push through please, been long ...
0
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0
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26
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Bitcoin sent to old address. No idea which wallet please help [duplicate]
Okay so on 7/7/25 I sent $300 to an address that was already copied on my clipboard it was the wrong addres.. I'm assuming it had to be one of my wallets because I had it copied on there in the first ...
0
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0
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32
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Guidance for beginner trying to fetch data on Blockchain
I would really appreciate your expert's guidance on a little project I would like to get going. The idea would be to be able to (1) calculate on-chain metrics such as Realized Price for Bitcoin, and (...
- 1
3
votes
1
answer
173
views
Why do different implementations produce different DER signatures for the same private key and hash?
I'm testing ECDSA signature generation across multiple implementations for secp256k1 (CLightning, Decred, libsecp256k1, Bitcoin Core) and noticed they produce different but valid DER-encoded ...
3
votes
1
answer
316
views
Increasing probability of block hash collisions when difficulty is too high
Suppose Bitcoin is operating at a very high difficulty. Then there are only relatively few valid block hashes (those below the current target, which should be relatively low if the difficulty is high)....
- 163
0
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1
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56
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I bought Bitcoin pre IPO $50 worth on amex
I think I should be able to claim it I own it. Why has it never appeared on the email it was purchased with? How much would it be now? I have contacted amex to receive the purchase records. I still ...
- 1
1
vote
1
answer
66
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My sortedmulti_a taproot descriptor is being rejected by bitcoin-cli, why?
I am attempting the following on regtest:
request: ["id": "51C82AC3-C966-4B37-BF01-426AB6A822D4", "jsonrpc": "1.0", "method": "getdescriptorinfo&...
- 554
0
votes
1
answer
56
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Can a bitcoin mnemonic or private key be diced - completely without a computer involved?
All methods I saw dicing the key offline/analog, involed a computer in the end to make the last word compatible. But is there a way to get a random key outside?
I know that dicing is not "100% ...
- 237
2
votes
0
answers
69
views
Why is the miniscript `after` value limited at 0x80000000?
Could we create a timelocked miniscript with an after value larger than 0x80000000L (year 2038)?
Given a fragment of after(num), Bitcoin Core currently returns an error if num < 1 || num >= ...
- 21
0
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1
answer
40
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where did my money go, who did it go to?
bc1qtunx4y69acmmcksptzt7u4evcj6wkhwdtk0x8x. I sent money to this place but who was it? i a, not sure who this money went to, I was given two different numbers and this one stayed in my wallet
- 1
-1
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0
answers
22
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I want make sure that my account is secure [closed]
So if someone transferred funds to my account, it's secure and can not be removed by that person just because they have my username?
- 1
0
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1
answer
25
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Btcminer online
I recently came across BTCMiner Online and I'm trying to figure out whether it’s a reliable option for cloud-based Bitcoin mining. The site claims to offer automated BTC mining, fast payouts, and ...
-1
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0
answers
24
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back in 2008 it was hand written .but where do I put these #s in to cash in ??¿? [closed]
Back in 2008 October 24th I had made a transaction with one of the first people with Bitcoin. And back then I got a trade # and a invoice # I also have a passkey. Because back in 2008 it was hand ...
0
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1
answer
41
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Bitcoin app that has over 200,000 saying I have but I've had so much trouble with for finding the actual site
I keep getting same email different different times with same amount of money going up it's a mining account
- 1
0
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0
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39
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Recommendations for a startup miner
I'm thinking about buying a NerdQaxe++. If I buy one of those every 3 months could I see a sizeable investment?
2
votes
1
answer
42
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Could Bitcoin Mining Survive a Carrington-Level Solar Storm?
Most of us have heard of solar storms, but it’s easy to underestimate what a truly powerful one can do. During a major solar eruption, the Sun can blast Earth with a surge of charged particles and ...
- 21
0
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0
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12
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How use bitcoin if forgot blockcHain web wall.t password but Have payload info?
Get info from v5 wall.t but inside wall.t fil. info about v3. Set up at 2016.
{"pbkdf2_iterations":5000,"version":3,"payload":"830zyt++yzOV0....
"...
0
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0
answers
51
views
How to recover old bitcoin
Years ago I was mining bitcoin and I broke my Mac so much threw it away and just totally forgot about it over time I just forgot about it. Is there a way I can recover what I already mined I for got ...
1
vote
0
answers
29
views
How to import an xpub into a Bitcoin Core watch-only descriptor wallet?
Given an xpub, how can I import this into a Bitcoin Core watchonly descriptor wallet?
I'll like to import the xpub so that past and future transaction activity is visible in Bitcoin Core.
There is a ...
1
vote
1
answer
78
views
"Invalid Schnorr signature" with Taproot script spend
I'm attempting to sweep funds from an address generated with the following descriptor:
tr(ff13a3311d3e14239bcbb9dfd5d304f4b57c32c0b35d313cb5255f93d7b2dc68,and_v(v:pk(...
- 111
-1
votes
1
answer
87
views
Are these things private keys or addresses?
zYXJfjr6MIxzyESmkwPQJpf9W
ewjU4Fz8EY78SZzWl52DbtV6zf9J8jjUuvZMBPDHINbJvXyVG4qjnVFJVuFx7EGae4Tl9qUPQBYwLIqrophJHKHzxc0xTJoESPBAiRqOLwRqMGojQkYOKhSjcpF8qEJTnSA8m7JvJA5zSrpSNkqsP7lzf2HkKLyw9
...
0
votes
1
answer
31
views
Does BIP-174 (PSBT v0) allow creating and serializing a PSBT with no inputs and one or more outputs?
I’m trying to understand whether BIP-174 (PSBT v0) supports creating a PSBT that initially has no inputs but contains one or more outputs.
The intended flow is:
Person A creates a PSBT with no inputs ...
- 27
1
vote
1
answer
70
views
Pushing spammers towards op_return?
Spammers already found exploits in Segwit and Taproot to spam the blockchain. I believe if the controversial change to the op_return filter in Core v30 is intended to push spammers towards op_return ...
- 11
4
votes
1
answer
64
views
How do new imported wallets know which outputs a wallet has?
There are basically two ways of knowing which outputs a wallet has:
They can check block by block since the genesis or a specific wallet's birthday and check if they are the owners of the UTXOs being ...
- 1,398
0
votes
1
answer
30
views
Rust Verify Signature
I'm trying to verify signed messages using Rust. lumo AI generated me this:
#[cfg(feature = "derive")]
use bitcoin::util::key::PublicKey;
use secp256k1::{Secp256k1};
pub mod messages {
use ...
- 31
1
vote
0
answers
25
views
Is the feerate lower certain days of the week?
Is the bitcoin feerate lower certain days of the week?
In my experience, earlier in the week, the feerates seem lower than over the weekend. Perhaps the feerate correlates to volume?
- 5,001
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25
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Bitcoin Transaction Disappeared
I recently installed Bit Core and run a Bit Coin wallet. I also installed Sparrow, which created the cormorant wallet in Bit Coin Core.
I sent a transaction to my Sparrow wallet from an Exchange - ...
- 1
0
votes
1
answer
82
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Date of creation of bitcoin.net and bitcoins.org
On the website whoxy, which has historical data of "who is" of domain names, apparently the two websites bitcoin.net and bitcoins.org were both registered on Aug 18, 2008 (before the white ...
- 139
1
vote
1
answer
172
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Do pruned nodes store witness inscriptions?
Since witness inscriptions are in inputs of transactions, not outputs, do pruned nodes store them?
If not, why is using OP_RETURN more beneficial to the network?
- 1,127
0
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1
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57
views
why I cant open my wallet
My vison is V22.0.0. and I already down all blocks,the mention is 'Wallet file verificatuon failed.faild to load database path does not exist. what could I do now. thanks
- 1
4
votes
1
answer
84
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Why does illicit content matter on OP_RETURN, but not in inscriptions? What is the technical detail, leading to a difference from a legal perspective?
All pro/contra bitcoin-politics aside, what's the reason that the anti-spam fraction is so scared of illicit content in OP_RETURN, while illicit content on inscription is already possible and way ...
- 237
0
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1
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82
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What is the purpose of the initial 0x04 byte in all extended public and private keys (xpub xprv ypub yprv zpub zprv ...)
BIP32 specifies a 4-byte version:
mainnet: 0x0488B21E public, 0x0488ADE4 private; testnet: 0x043587CF public, 0x04358394 private
BIP49 has a variant:
Extended public keys use 0x049d7cb2 to produce a &...
- 5,289
4
votes
0
answers
81
views
Why did Satoshi put nBits in the coinbase scriptSig?
While discussing a recent Bitcoin Core pull request [0] it was pointed out that in the original Bitcoin code, or more accurately the first commit on Github, the miner produces a coinbase scriptSig as ...
- 1,558
0
votes
0
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65
views
I bought Bitcoin back in 2020 and the only evidence I have is on my bank statement. It says I bought Bitcoin from Bitcoinau . I need to find who they
I bought Bitcoin back in 2020 I'm trying to track down ,,the only evidence I have of the purchase is on my bank statement saying the company's name Bitcoinau . There's nothing online I can find using ...
0
votes
0
answers
31
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Asked to pay a security fee to get my money out of my trust wallet account [duplicate]
So i am being asked to pay a security fee for my funds in Trust Wallet. This does not seem legit to me.There is £3600 in the wallet and they are asking me to pay a 'one off' fee of $2000
Can anyone ...
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0
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0
answers
44
views
BTC Sent received but not confirmed? (490 confirmations later) 2 days have past
As per title, did two transaction used the same BTC wallet address- first BTC received just fine but the other I did not? TID below? it says not confirmed but received?
Transaction ID: ...
0
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1
answer
62
views
btcrecover create-address-db: inconsistent Bitcoin address retrieval
I'm trying to create a Bitcoin address database using btcrecover and Google BigQuery data. While the Ethereum database works fine, my Bitcoin database fails to return any addresses, even though test ...
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1
vote
1
answer
36
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Was there any inconsistency with mempool size when using Bitcoin core v28.0.0?
I had been using v28.0.0 from October 2024 until this week. Mempool seemed normal initially, then from around April this year it was down from over 200M memory to typically 15-20M.
I recently changed ...
- 11
0
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1
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92
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Would a "Bulk Dust" relay/consensus rule (limiting 100+ sub-1,000-sat outputs, plus a ratio check) be effective without negative effects?
I’m exploring a potential solution to discourage UTXO-bloat patterns without touching Script or witness semantics. This rule simply flags "bulk dust" transactions that create many very low-...
- 41
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1
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81
views
Do you guys actually write down your seed phrase?
Honest question I always think I’ll remember, but I never do. Anyone use digital backups safely?
3
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1
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491
views
What is the smallest valid transaction that can be included in a block?
In Bitcoin Core's codebase in consensus.h there is two variables:
static const size_t MIN_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 60; // 60 is the lower bound for the size of a valid serialized ...
0
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0
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54
views
Private ID 24 Fishing and private ID stolen
After my account was hacked and the funds were stolen, a lot of effort was made to prevent me from noticing the stolen amount—probably because there's a risk of it getting traced or stuck. The 24-word ...
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1
vote
1
answer
81
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Why is KnapsackSolver still in Bitcoin Core?
Of all the coin selection strategies implemented by Bitcoin Core, KnapsackSolver seems like the least useful. I can't think of any reason to not prefer using BnB and falling back to SRD if BnB fails ...
- 71
0
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0
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68
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Were the fixes for CVE-2025-54604, CVE-2025-54605, CVE-2025-46597, and CVE-2025-46598 back-ported to any Bitcoin Core 29.x or 28.x release?
The Bitcoin Core Project disclosure on October 24 2025 lists several low-severity vulnerabilities: CVE-2025-54604, CVE-2025-54605, CVE-2025-46597, CVE-2025-46598.
Each entry indicates that fixes were ...
- 643
1
vote
0
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43
views
Why does it take a few days after a new Bitcoin Core version is tagged for it to be released?
I was following the release process for Bitcoin Core 30.0 closely and was wondering when it was actually released. There was first news that the release was tagged, later someone posted on Twitter ...
- 79.6k
1
vote
0
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31
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Why was the minfeerate policy update backported?
Bitcoin Core 30.0 made several mempool policy changes. Usually, new features are not backported. The policy changes that lower the minimum relay transaction feerate, the block minimum feerate, and the ...
- 79.6k
2
votes
1
answer
214
views
How well does Ark scale bitcoin payments?
I am not an expert here but it is my understanding that making a payment with ark means at least creating a vtxo - potentially destroying several. If I understand correctly the liquidity requirements ...
- 12.1k
1
vote
1
answer
55
views
Which wallet should I choose? [duplicate]
Now I'm choosing a wallet so as not to store money on the stock exchange, which one to choose, which way to look
1
vote
2
answers
215
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I read that OP_TEMPLATEHASH is a variant of OP_CTV. How do they differ?
OP_TEMPLATEHASH and OP_CHECKTEMPLATEVERIFY appear to be closely related. What are the key differences and what trade-offs do those imply?
- 79.6k