Questions tagged [blockchain]
This tag should be used for questions pertaining to the blockchain. The blockchain is a list of all transactions that have occurred using the Bitcoin currency. It consists of blocks which are linked to each other, and each block consists of transactions. DON'T USE THIS FOR THE SERVICE NAMED 'blockchain.info'!
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Scalability problem: is the end of Bitcoin near?
I was reading in Wikipedia that the blockchain can only handle around 7 transactions per second:
https://en.wikipedia.org/wiki/Bitcoin_scalability_problem
With the soft fork for SegWi, I can imagine ...
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34 views
Blockchain.com wallet
Just a basic/general question, recently when I send bitcoin using blockchain.com's wallet I noticed within my transaction logs Received BTC to: BTC Trading Wallet. From: BTC Wallet directly after Sent ...
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0answers
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again: missing turnover [duplicate]
I should receive a bigger amount of bitcoins to my wallet. Now I got the message: missing turnover 2,1 BTC. I got explained, the amount was to big so I have to put in 2,1 BTC in my wallet so that it ...
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2answers
38 views
verification of wallet to be verified
To have btc transferred into a wallet does it need a certain amount of btc in the wallet for it to be verified. Does this amount depend on total btc to be transferred
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Why Ripple is able to process transaction faster than ethereum and bitcoin? [duplicate]
I was wondering what makes Ripple very fast(Transaction per seconds) rather than Ethereum and Bitcoin? Currently, I'm doing a research on how to reduce transaction confirmation time in blockchain.
Is ...
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19 views
Is it normal that blk and rev files are blank?
I am trying to run a full node on a Raspberry Pi 3.
My computer is also not so good for initial block download.
So I got a borrowed computer and synced the whole blockchain overnight.
Then I copied &...
0
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0answers
10 views
How to accelerate the long time for bitcoin-core to sync the blockchain? [duplicate]
How can I accelerate:
the process of sync'ing bitcoin-core for console usage? Pokey internet. Can't I sync recursively and in the background? Just looking to learn by playing and using console ...
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2answers
62 views
What are the benefit of mining an empty block
Something peculiar just happened on the newly mined block number 655534, it contain only the coinbase transaction, nothing else.
I have searched for a similar question but only found this one Why ...
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1answer
37 views
How does initial exchange of inventory work when both nodes have different chains?
When two nodes connect to each other and exchange getblocks messages but they have different blockchains will both nodes download each others blockchain to verify which has higher chainwork or will ...
0
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1answer
20 views
how does bitcoinjs-lib grab utxo
So, Let's say I want to create a transaction by using bitcoinjs-lib.
As far as I can see, this library doesn't provide the help so that it can automatically figure out/grab unpent transactions for ...
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0answers
15 views
how to get txid with sha256
I am trying to get a txId from a transaction without any bitcoin libraries. I can use low level libries though such as crypto, sha256 and so on.
I have a class which contains version, vins, vouts, ...
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1answer
64 views
How to improve bitcoin-qt when downloading blockchain? (very technical, dev views appreciated)
GitHub suggested discussing here before bothering developers with an issue.
So be it! :)
I'm running Bitcoin Core Version v0.20.1 and Linux Mint 18.3 on crappy old hardware. Pruning blockchain to 2 G ...
0
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1answer
45 views
can someone give me an example on how collaboration is difficult without the Blockchain?
i understand the technology and i understand how it helps in two domains which are voting and currency but i don't understand how the Blockchain helps in other domains such as health care or ...
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0answers
15 views
Bitcoin sent , no confirmation on receiver’s or sender’s end [duplicate]
Transaction ID: f6132f9d9e1b80d0c852a40a172d870a3f3d4a5a8f6706300a91bc704731cf96
I do not know what is going on. I have sent the bitcoin to the receiver’s address on the same wallet and the receiver ...
0
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1answer
27 views
How to develop a crypto exchange leveraging on third party API like coinbase, blockchain.com [closed]
I got a request as a developer to develop a bitcoin exchange site like https://mypatricia.co/ or https://instantcoins.ng/ I am to leverage on third party API like Coinbase, blockchain, it could be ...
0
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1answer
49 views
Can you help me see if I have an old Bitcoin account? [closed]
I set up an crypto account & had different coins in it, but the computer died, updated to a current machine. Have also changed from AOL to Gmail, that was around 98 or 99, if that gives you any ...
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0answers
34 views
Initial blockchain sync stuck on block 237158
Stuck on block 237158. Rebooting doesn't work.
Do I need to start from scratch?
admin@raspberry2bit:~ $ sudo tail -f /mnt/ext/bitcoin/debug.log
2020-10-26T08:48:30Z Loading addresses from DNS seed ...
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0answers
46 views
Looking for someone to help me recover stolen BTC [duplicate]
I need help recovering 7.01386067 BTC that was stolen from me through an investment scam. I have included a picture of the blockchain transactions of the bitcoins i purchased:
BTC purchased of which ...
0
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0answers
15 views
How to automatically get transaction while sending BTC?
Here is my SendBTC method. I do not want to pass fundingTransaction variable each time I call this method. Currently, I pass fundingTransaction value by looking up to https://testnet.smartbit.com.au/. ...
0
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1answer
24 views
NBitcoin Transaction sign(secret, bool) is giving error. Instead of bool it says to pass Coin Object
I am using NBitcoin (I'm new to it) to sign a transaction. Here Transaction sign(secret, bool) method is giving error. (I've searched the Internet, but got no help.) Instead of bool it says to pass ...
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2answers
52 views
How many addresses can be in input and output of a transaction
I have read through this question and i understand that there can be many sender and receiver addresses within 1 transaction(i'm new to bitcoin transaction, previous i was working with ethereum where ...
0
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1answer
59 views
How to create bitcoin coin , coinbase transaction?
I know about
createrawtransaction '[{"txid":"0000000000000000000000000000000000000000000000000000000000000000","vout":0}]' '{"39jbHRLG6Z2KgXLHR3BWgbccZde1Moo15k"...
3
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2answers
546 views
in bitcoin core, how to use Tor for broadcasting new transactions only?
I have set up a full node with bitcoin core running on the internet. I have also set up a wallet running on a private machine that communicates to the full node to broadcast new transactions.
To ...
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1answer
46 views
How can Forks and Orphan Blocks be used to attack a Blockchain?
So I'm trying to learn about the security aspects of Blockchains and one of the papers I'm reading (https://arxiv.org/pdf/1904.03487.pdf) states that Forks and Orphaned Blocks can be used to attack a ...
0
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2answers
36 views
what does segwit remove?
It's said that Segwit removes signature data from transactions which makes block have more space for more transactions.
Question 1)
If SegWit removes signature data, where does it put it exactly ? ...
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0answers
23 views
how does node remove conflicting transactions from memory pool?
Sorry for the long text. This is just my observation and was wondering if you could let me know if I am correct or not.
Case 1)
Let's say minerA and minerB both have the same transaction in their ...
2
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1answer
75 views
how does node create UTXO from blockchain for the first time?
Let's say I am a new node.
I try to synch with the full node to grab the whole blockchain. Now, I synced with it .It's time for my node to create UTXO database ..
How does it do this exactly so that ...
0
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1answer
34 views
Blocks seem to store only txIDs, where does the transaction data come from for IBD?
I know that blocks store transactions. After looking into a block, I can see that it only stores txIDs.
Question 1 - Where are actual transaction objects stored?
If you tell me that it's stored in a ...
0
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1answer
44 views
Is a timestamp in bitcoin different than just the “stamp of time”?
In the "References" section of Bitcoin's whitepaper, Satoshi Nakamoto points to three papers that serve as inspiration for digital timestamping.
When you read those documents it is clear ...
0
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1answer
37 views
Why do other miners check block validity along with proof of work? [duplicate]
I am new to blockchains and bitcoins. So, please pardon the lack of understanding. Assume I am a miner who adds a bogus transaction (say a transfer from my account which has 0 balance to my other ...
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0answers
25 views
nodes are run to get rewards or just to help bitcoin [duplicate]
I wanted to make a share of my help in bitcoin validation. my question is do Running A Full Node to validate transactions pays reward back or not so I can also benefits from my help to the community
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2answers
295 views
How to you recover a stolen bitcoin lost to an investment scam?
I once lost my bitcoin to an investment platform and it took a while before I managed to get my bitcoin back. My question is I want to know how many people have lost their bitcoin and how do you ...
0
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1answer
43 views
how does GHOST protocol really work?
I am trying to wrap my head around GHOST protocol... I know it's too much to read, but not my fault. It's GHOST that's complicated (i guess)
As I read, it's said that:
instead of a longest chain ...
0
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1answer
42 views
how does bitcoin's 6 confirmation really help?
I've read the following:
transaction is “confirmed” once it is buried 6 blocks into the
blockchain. This is taken to be a sufficient proof of work such that
reversing 6 blocks to double spend coins ...
0
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1answer
896 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
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1answer
34 views
how does node validate scriptSig
Let's say I sent some BTC to Bob, so I created a transaction (forget about scriptPubKey) since let's say I was able to prove it by executing scriptPubKey. so After I sent BTC to BOB, new transaction's ...
0
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1answer
34 views
how does bitcoin know which one is utxo? [duplicate]
Let's say John gave 5 BTC to me. So, John took his unspent outputs and put it into inputs to create a transaction. Let's say John already had a transaction which was holding exactly that amount of ...
0
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1answer
50 views
List of different unknown mining pools
A miner can identify himself when he receive his coinbase transaction, we can view them on website offering block explorer like https://www.blockchain.com/charts/pools
Some of these miners are listed ...
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1answer
48 views
Can you verify partial blockchain information from a third party, without yourself having an entire blockchain?
I'm considering consuming, or if unavailable, I'm considering providing, a bitcoin blockchain querying service along the lines of json rpc.
Would it be possible for me as a consumer of such as service,...
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0answers
40 views
anyone can help me recovering my bitcoin bip38 password? [duplicate]
i have bitcoin wallet with more than 1 btc but i cant import it without losing this amount cos i forgot the bip38 password
public key: 1CZosSHnf87ZqZ3fRiAuikpzdCZhAKsi3y
private key: ...
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1answer
36 views
how and when does block and transaction validations take place?
I have a couple of questions and will try to explain them here.
So, let's say we have 4 nodes in the whole network.
one of the nodes (node A) took transactions from pool. before they put it into a ...
1
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1answer
49 views
how to make own coin with soft fork? [closed]
What I am looking to do is soft fork on litecoin and create my own coin! I know that I need to make a node but I can't find any process that shows me how to create my own coin.
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2answers
37 views
Bitcoin users limit
How bitcoin handle users limit if only 4000 transactions in every 10 minutes ? Let's say I transfer 2 bitcoin to Anuj account then how much time maximum it will take to reflect in Anuj's account and ...
0
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1answer
34 views
Tiny 1-block forks in blk.dat files
I just completed parsing the Testnet3 Bitcoin blockchain stored in the blk.dat files into a database. Since I was using multi-processing to parse several files at the same time, I didn't add the ...
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1answer
75 views
Zero Day BlockChain Timezone Exploit
Couple weeks ago, a new Blockchain exploit was found by a hacker named: Zer0dayxploit
unfortunately, i am not a tech person, but it seems you can earn abt 500$ a day with this exploit!
He wrote a ...
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1answer
54 views
How does block propagation delay not cause accidental forks?
Block propagation delay, it looks like, is about 122 seconds in some cases. If another block is formed before the first block is completed, wouldn't this accidentally create a fork? How would this ...
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2answers
94 views
How do I withdraw from an address
I made a Crypto purchase from Shapeshift yesterday, which was fulfilled by one of their partners called BANXA. I just received an email saying "Your order has been fulfilled and you will receive ...
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2answers
402 views
How do you transfer BTC from the lightning network to BTC on a normal blockchain?
And does it include any fees???
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4answers
133 views
How is data in a blockchain stored? Structure of block and blockchain
I'm trying to build a blockchain-based application and I have a problem with understanding some crucial issues.
What exactly is a block? I mean, I've seen application where blocks were just String ...
0
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2answers
74 views
How many transactions are there in one block
What I understand:
When a transaction is made , miners compete to validate it and create a hash . If one miner creates the hash and more than 51% of miners agree on the validity .Then the a block is ...
