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30 views

btc qt walletdump

I'd like to dump my entire btc qt wallet, while syncing, into an electrum wallet. I don't want to do it receiving address by receiving address. I already emptied out all my receiving addresses but ...
0
votes
1answer
83 views

Bitcoins gone missing in Blockchain Wallet

My wallet password was not compromised but my bitcoins have gone missing from my wallet with a transaction that says - replace by fee. I have send two messages to support at Blockchain to find out ...
1
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0answers
71 views

LND Port 9735 still closed after setting up port forwarding and firewall

I have set up my bitcoin/lnd full node and would like to have it run as a routing node for the network. So I have opened my port 9735 from the router and allowed access to it in my firewall (ufw on ...
0
votes
1answer
37 views

How to get BTC transfer amount from raw tx using bitcoinjs

Suppose I have following object console.log(bitcoinjs.Transaction.fromHex(rawTx)); The output Transaction { version: 2, locktime: 1655960, ins: [ { hash: <Buffer dc 4d aa 10 db ...
1
vote
1answer
37 views

Testnet addresses fail in explorers

I've generated a testnet address like this: const btc = require('bitcoinjs-lib'); const bip32 = require('bip32'); const bip39 = require('bip39'); var root = bip32.fromSeed( bip39....
3
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2answers
570 views

What happens with the bitcoin locked in the payment channel if both sides lose the backup?

If none of the sides closes the channel, is the coin locked up forever?
0
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0answers
34 views

What can cause the chainstate database to become corrupted?

I have written a tool that accesses the chainstate LevelDB database to get a list of UTXOs. https://github.com/in3rsha/bitcoin-utxo-dump/blob/master/utxodump.go The tool would originally corrupt the ...
0
votes
1answer
57 views

Tracking incoming transactions using nodejs and own node

I need to verify that user from my database has sent btc to my wallet. Ideally I want to generate a unique address for each user transaction and then track all those addresses but I suppose it will ...
1
vote
1answer
77 views

Why keys generated in Bitcoin Core mismatch that from online generators despite using the same seed?

I have the following problem in Bitcoin Core. With this command: echo carpet begin bacon master draft fortune food cherry cage axis vault clown | \ bx mnemonic-to-seed | \ bx hd-new -v 70615956 | \ ...
1
vote
1answer
45 views

What goes in the tx hash preimage when signing with 0x83 (SINGLE|ANYONECANPAY)?

I have script to create a P2WPKH to P2WPKH transaction (1 input, 1 output) and sign it with the sighash type 0x01 SIGHASH_ALL. Which fields would I need to change in the tx digest preimage to turn ...
0
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0answers
16 views

btc qt syncing but taking to long/dumpwallet debug console problems

Would like to transfer my btc qt wallet to electrum but having difficulties. My node is currently syncing Tried emptying out receiving addresses and was successful but there are still more coins in ...
0
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0answers
16 views

How do I add a multisig wallet to a site, so that each user can top up their account and buy things

I want to add a multisig wallet onto my site, the idea being users can top up BTC and spend it on the site to buy things like iPhones or MacBooks we have for sale, thanks
1
vote
1answer
35 views

How many bits of entropy is a Bitcoin address?

I've seen references to 160 bits of entropy, but I'm not sure if this is universal or just applies to the old address format.
0
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2answers
99 views

Stratum protocol - problem with implementation in python

For a couple of days I'm trying to write simple script in python to communicate with stratum pool server. I'm using simplified code of NightMiner (https://github.com/ricmoo/nightminer/) and some ...
0
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2answers
57 views

I want to transfer my bitcoin but i cannot

I want to transfer bitcoin to a wallet adress but when i send it gives me this error There was a problem sending your transaction Uneconomical UTXO requested [type: 1 (limit 5643), txOut.val: 4123, ...
1
vote
1answer
43 views

Simple, default, “hello world” smart contract for an auction? (winner wins, all the rest gets refunded)

I recently read an article: https://medium.com/@jimmysong/the-truth-about-smart-contracts-ae825271811f Because of a lot of centralized marketing from Ethereum, there’s a mistaken belief that Smart ...
0
votes
1answer
42 views

How does bitcore handle transactions in orphan block situation?

I know orphan blocks can occur naturally when two miners produce blocks at similar times. in bitcore-node, How does this handled? for example, when orphan block occur in node, does bitcore change ...
5
votes
3answers
276 views

How is the size of a bitcoin transaction calculated

From what I understand, the fees set on bitcoin transaction are based on a recommended fee (mostly, from a 3rd party service) per byte of the transaction size. What I am curious about is how do ...
1
vote
2answers
302 views

What are the DER signature and SEC format

I often see those 2 elements in bitcoin documentations and tutorials but I have not yet find a proper definition on the internet for DER signature and SEC format.
2
votes
0answers
30 views

Is it safe to skip the initial block verification at startup?

The longest step in bitcoin core initialization is "Verifying last 6 blocks at level 3". The number of blocks checked at startup went down from 288 in 2014 to 6 now. Therefore, in order to speedup ...
0
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0answers
58 views

Cannot open dump wallet file (code-8)

Is anybody familiar with this problem using btc qt debug console? Would like to dump wallet and sweep into electrum.
0
votes
2answers
53 views

Where and when should the coinbase transaction(including the miner key) be added?

I'm making a simple demonstrator program, pretty much a simplified bitcoin clone based mostly on the original whitepaper. Please bear with me, because I haven't found a way to describe the problem ...
0
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0answers
31 views

Hexadecimal Bitcoin Transactions

Suppose I have a random transaction which I recovered from blockchain blk****.dat file. How can I calculate the number of confirmations of this transaction? I dont want to use the RPC call ...
-1
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3answers
58 views

How can i convert my euro in BTC the fastest way [closed]

consider me a crypto noob. All i want is to transfer some ~10 euro (reside in my prepaid mastercard) to a BTC address (i have one, in my blockchain account). Then i need to give those BTC to some ...
0
votes
1answer
28 views

How many bitcoins do bitcoin faucets give away per day on average?

I just found out about bitcoin faucets. Apparently they give away very small amounts of bitcoins (or satoshis, for that matter) in exchange for performing some minor tasks, like solving CAPTCHAs or ...
0
votes
1answer
33 views

How to display Recipient Address, Change Address & Transaction Amount

I have made A software in which i can Signed Transaction (From Electrum Un-Signed Transaction HEX), i just want to display the following thing to USER in Readable Mode : 1. Recipient Address 2. Change ...
0
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0answers
20 views

Trouble dumping btc wallet

Btc is syncing and taking to long. Would like to dump wallet and sweep in electrum. When I try the dumpwallet command I get "Cannot open wallet dump file (code -8)" What to do? Do I have to stop ...
2
votes
1answer
61 views

Estimated Fees in BCOIN

I installed a BCOIN full node and I would like to calculate estimated fees for Bitcoin transactions. This functionality works perfectly in the CLI. For example: bcoin-cli fee 3 Anyway things go ...
0
votes
0answers
26 views

Edge private keys

I want to read the balance on my Edge wallet programatically. I have thus taken the wallet's Master Private Key, which I had expected to be a BIP39 seed phrase but is instead a hex value, and am ...
1
vote
0answers
29 views

Verify Receive and Change Addresses

I run a coldcard with Electrum and Electrum-Personal-Server. As I understand it, we use hardware wallets because we don't trust our laptops. However, I've only been able to verify the sending ...
0
votes
1answer
60 views

How to monitor Bitcoin address for new transactions?

I have some generated Bitcoin addresses which I want to monitor for newly received transactions, I have a full node but I don't want to import those addresses to the node's wallet. I don't want to use ...
0
votes
2answers
64 views

Is it possible to mine bitcoins faster on CPUs with this strategy?

This guy on bitcointalk.org suggested a potentially faster method for mining bitcoins using CPUs: https://bitcointalk.org/index.php?topic=265759.0 To quote from the author: "Rather than ...
0
votes
1answer
50 views

What is the 'tlv_payload' in lnd route?

When creating a custom route, if you use the queryroutes from lnd it sometimes with tlv_payload set to either True or False. How does the node figure whether to set this flag? I cant seem to find ...
0
votes
2answers
56 views

how do you transfer your Bitcoin core wallet while syncing?

I would like to transfer my btc wallet to an electrum wallet. Syncing is taking to long.
0
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0answers
13 views

Testing libbitcoin-client on bitcoind regtest connection failed

Can I test libbitcoin-client against bitcoin core regtest mode. My connection Fails with no error response. Running curl commands on bitcoind server works fine but running the same commands against ...
0
votes
2answers
60 views

How to withdraw or transfer to bank account [closed]

I have bitcoin and i want to sell or withdraw to get the amount to Indian bank or Paypal. Is there any way to get the equal amount for bitcoin. If yes and how?
0
votes
1answer
20 views

Improve uniqueness of block for nonce creation

I am going through online Blockchain course and in the course, they have mentioned that uniqueness of a block is defined using hashes with leading zeros as well as timestamp. Since, in the training, ...
0
votes
0answers
27 views

Which application software can be used to simulate the Proof-of-work algorithm of a single node?

Which application software can be used to simulate the Proof-of-work algorithm of a single node, with parameters such as changing the size of the Nonce and inputting customized block created ...
2
votes
1answer
56 views

Is there a 'command' to get the max supply of bitcoin that will ever exist using the bitcoin-cli?

I would like to know if there a way('command') to know what is the max supply of bitcoin using my own node without trusting a third party. Also if anyone could explain to me why : bitcoin-cli ...
0
votes
1answer
34 views

If I were executing a 51% attack, would I be broadcasting my state of the network to nodes?

In the scenario where an entity has control of greater than 51% of the hash power and wishes to build a longer chain where they double-spend previously confirmed transactions, do they broadcast the ...
2
votes
1answer
40 views

Taxation and Cryptocurrencies

How can a government make people holding Bitcoin pay capital gains tax on their holdings if everyone is pseudonymous? If crypto becomes widely adopted, will we have to rely more on sales taxes (e.g. ...
1
vote
1answer
36 views

Why is 'p2pkh:' prepended at the beginning of private key addresses in electrum?

I recently started a Blockchain course and came across the electrum software. While going through the list of wallet addresses and associated private keys I found that 'p2pkh' is placed at the start ...
0
votes
0answers
11 views

bitcoin insight api installation issue

I've been trying to install insight api for a few days but in vain , bitpay is no longer supporting this repository but I have an application that requires the endpoints in this one that aren't ...
0
votes
0answers
146 views

Not seeing deposit transaction in Electrum from BTCPayServer after invoice has been paid

I have imported my xpub into btcpayserver store and created some invoices and paid them. The btcpayserver wallet shows the balance from the invoices as having been paid. However when I look at ...
1
vote
1answer
48 views

Problem with using blockchain for E-Shopping

I have a confusion with blockchain concepts. Blockchain is immutable. So we can have problems in using blockchain for shopping websites. Because if we use it for retail, people have a habit to return ...
0
votes
1answer
110 views

What does mBtc mean [duplicate]

I’m using Electrum 3.3.8 and I recently made a sale and got 0.83 mBTC. I’ve tried to convert the mBTC to USD. it says i have $5000+ but I was selling the product for only $6
0
votes
1answer
23 views

How to determine the peer/node that created a transaction?

You're running your node and you receive a transaction from a peer, how do you determine if that peer created the transaction or if it is simply relaying the transaction. In other words, can you map ...
2
votes
1answer
26 views

Transaction propagation criteria vs mempool inclusion cirteria

Do Bitcoin nodes propagate every transaction or only transactions that meet certain criteria? For instance, a transaction with a fee of 0 won't necessarily get included into a block and it might even ...
1
vote
2answers
72 views

Calculate transaction fee for external addresses which doesn't belong to my local bitcoin-core server?

I am doing transaction on addresses which are created outside of my local bitcoin-core server using third party lib. I am having its private/public key. I am able to create raw transaction using "...
3
votes
1answer
129 views

Understanding the bitwise left shift logic on determining nSubsidy

I'm trying to understand how the >>= operation in nSubsidy >>= (nBestHeight / 210000); actually cuts the subsidy in half every 4 years on Bitcoin v0.01. It is clear how 210000 blocks ...

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