Questions tagged [block]
This tag should be used for questions related to Bitcoin blocks
582
questions
0
votes
1answer
49 views
How does the difficulty target affect the time to complete the block? [duplicate]
So, I'm currently doing a personal project where I'm creating my own crypto blockchain (just for fun). I'm currently coding the Difficulty Target part of the Blockchain, but I'm not entirely sure how ...
2
votes
1answer
272 views
Bitcoin transactions over Ripple Network
I am interested in using the ripple network in conjunction with bitcoin transactions, but am curious as to interplay between the ripple ledger verification and the bitcoin blockchain verification.
I ...
0
votes
0answers
25 views
Is it true that the rate of finding a new block is constant, but just that the bitcoin reward become less and less? [duplicate]
Can somebody ELI5? Is it true that every block that is discovered, the person that discovered the block will be awarded 12.5 bitcoins? But to discover such a block, somehow the person has to get a ...
0
votes
1answer
32 views
creating your own bitcoin block
I've just started reading about bitcoin, and I had this question, what if :
I created two bitcoin addresses.
added for example 1 btc to one of them.
then I start sending that 1 btc back and forth ...
0
votes
2answers
92 views
1 MB Block Size as a Anti-DoS Attack Measure
Wikipedia explains the rationale behind the 1 MB block size limit as follows:
The one megabyte block size limit was added in 2010 by Satoshi
Nakamoto as a temporary anti-DoS measure
A SE post ...
0
votes
0answers
21 views
unconfirmed transaction 1/2fdlhhxj [duplicate]
I have seen a transaction in my wallet that was not made by me how can I stop it please it’s still on 1to6 unconfirmed
0
votes
1answer
32 views
Do all of the records in the same block share the same hash?
From what I have read, when a transaction is settled, the record is added to a block among with other records. The block is given a new hash as well as a hash from previous block.
So does that means ...
0
votes
2answers
79 views
Does bitcoin mining pool hash randomly and separately
When it comes to hashing does each mining entity use total random seed for each of their hashing function or do they have a range like " Im gonna cover from 0 to 500, and you cover from 500 to ...
9
votes
2answers
196 views
Why are block header bits necessary? (Valid difficulty is already implied by chain history)
Difficulty or target is implied by chain history, so why does it need to be explicit in the header? I suppose it exposes miner-intended-difficulty, but I don't see why that would be relevant without ...
3
votes
1answer
1k views
Do Miners get a reward for re-confirming blocks?
As far as I know, to ensure double-spending didn't happened and also for other security reasons, there is minimum number of confirmations that a transaction should have to be accepted. That value is ...
0
votes
1answer
111 views
How do I call getblocktemplate from C#'s bitcoinlib?
How do I call getblocktemplate from the bitcoinlib package for C#?
This call does not work
ICoinService CoinService = new BitcoinService(useTestnet: true);
var blockTemplate = CoinService....
0
votes
0answers
20 views
Block with a smaller height mined after blocks with higher height? [duplicate]
According to the Timestamp: 2020-11-05 16:03 of the block 655534, this block was mined before after the subsequent block: 655535 Timestamp: 2020-11-05 15:31.
How can this be?
1
vote
1answer
46 views
Why is the block size so big, taking into account a relatively small number of transactions?
Why the size of the block 656143 is so big (Size: 2,337,727 bytes), taking into account a relatively small number of transactions (Number of Transactions: 84)?
Extra question: What is the block size ...
0
votes
1answer
62 views
Question regarding stale blocks and the heaviest chain
According to this website: https://forkmonitor.info/stale/btc/644543, at the block heigh 644543 multiple blocks were produced. If I understand correctly, in Bitcoin, the heaviest chain survives, while ...
0
votes
0answers
146 views
Upgrading - OLD PC - Wallet v0.8.1-beta and qt v4.8.3
Can you advise me on upgrading my wallet and bitcoin software. Are there files I should save before upgrading? what should I upgrade to? Other basic questions.
I have a number of bitcoin files in my ...
1
vote
1answer
65 views
How bitcoin network appends new block in its Block-chain
Well, According to my research, After solving the cryptographic hash, when the multiple nodes broadcast the block at the same time as a suggestion to be the next block in the chain. Bitcoin network ...
0
votes
1answer
88 views
What pools will allow asic block erupters these days? [closed]
I'm a Ubuntu cgminer/bfgminer guy and purchased 6 asic block erupters and a newbie to mining. Could never get into slushpool, but have been mining for poolin for about a week and really don't see any ...
3
votes
1answer
97 views
Which blk*.dat file contains a particular block?
Is there a way to find out which blk*.dat file contains a particular block?
For example, it would be useful to know which *.dat file contains block 478558, which is the point where BCH forked from BTC....
0
votes
0answers
47 views
What is the total number (or rate) of orphaned blocks in Bitcoin in 2020?
Apparently, blockchain.com stopped to provide such information in 2017. Obviously, we still have orphaned/stale blocks in Bitcoin (see, e.g., BitMEX Research: Bitcoin Has a Stale Block For The First ...
2
votes
1answer
87 views
Is every copy of the blockchain the same? If I have an error within file should I be able to copy this file from a backup and reindex chainstate?
I recently moved the first 2000 files of my blockchain from the SSD to a HDD. The HDD gets mounted in /mnt/ext.
A symlink per file is then put into blocks that points to the remote files. So my blocks ...
2
votes
2answers
124 views
Why does the txn_count field exists in a block?
I was wondering why the txn_count field in a block exists. The count of transactions could be determined by parsing the txns field in tx format, right? Same for 'tx_in count' and 'tx_out count' in a ...
0
votes
0answers
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 &...
1
vote
2answers
145 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 ...
1
vote
0answers
18 views
How much does a block's recorded time differ from the actual time that my node first sees it? [duplicate]
A block has a "time" and a "mediantime". Is it correct that the "time" is supposed to generally reflect the real time the block was mined and broadcast to the network? If ...
0
votes
0answers
43 views
bitcoin-cli getblockchaininfo "blocks": 0 "headers" 0
Noob question.
I've been following the raspibolt set up (https://stadicus.github.io/RaspiBolt/raspibolt_30_bitcoin.html), but I'm stuck trying to get the initial sync started.
It is active (running)
...
1
vote
1answer
95 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 ...
1
vote
0answers
127 views
Attacker Changing Address to Receive Block Reward [duplicate]
A miner creates a block B which contains address α, on which he wants to receive his rewards. An attacker changes block B, such that instead of α it defines a new address α’, which is controlled by ...
0
votes
0answers
52 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 ...
3
votes
1answer
91 views
Given a bitcoin block, what's the easiest way to determine the minimum net fee rate (including ancestors) for transactions in that block?
Given a bitcoin block, what's the easiest way to determine the minimum net fee rate (including ancestors) for transactions in that block?
A naive approach would be to just find the minimum fee rate ...
1
vote
1answer
437 views
In Math or Python notation - How to convert bits to difficulty?
Questions
What are the equations to convert between bits and difficulty?
&
understanding bits and difficulty in a block header
ask how to convert between bits and difficulty. Unfortunately, I ...
0
votes
1answer
117 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 ...
0
votes
0answers
44 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: ...
0
votes
1answer
47 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 ...
1
vote
4answers
757 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
votes
2answers
361 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 ...
2
votes
1answer
66 views
Why are mined blocks not always full
Why do mined blocks tend to vary so much in size. If the miner's objective is to maximize their revenue from transaction fees they should add transactions starting with the one with the largest fee, ...
1
vote
1answer
53 views
How come the bitcoin blockchain is only 285gb only?
I found some statistics that the bitcoin blockchain is 285gb.
https://www.statista.com/statistics/647523/worldwide-bitcoin-blockchain-size/
Bitcoin has been around for how long? 10 years?
with 1mb ...
1
vote
1answer
107 views
How to see highest available block number in "Bitcoin Wallet" app for Android (Schildbach wallet)?
If I have downloaded the "Bitcoin Wallet" by "Bitcoin Wallet Developers" (Schildbach wallet) onto an Android phone from the Google Play store, how can I see the latest block number ...
0
votes
1answer
167 views
How to know Block height when a transaction entered Mempool?
I'm hosting a Listening Bitcoin Node in Capital of Pakistan. I want to know the Block height when Transaction entered the mempool. Right now I'm using the time from the Json format of the Transaction ...
0
votes
1answer
91 views
Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Was this an error?
Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Is this an error? I have been through a lot of the BIP documentations, but cannot seem to find any ...
6
votes
1answer
7k views
What is the block verification procedure, and will it ever become too expensive?
I'm trying to get a grasp on which items the network is responsible for validating / enforcing. If I understand correctly, when a new block is received, the recipient needs to verify the following:
...
4
votes
2answers
2k views
Which cryptocurrency has the smallest block time?
What is the lowest block time of any cryptocurrency? I don't mean the time of an individual block, but the target time per block.
What is the shortest reasonable block interval?
1
vote
1answer
76 views
bitcoin block time after halving? [duplicate]
I would like to know why the bitcoin block time is taking longer than 10 minutes, I know that bitcoin halving had decrease reward and increase difficulty but according what I read the blockchain ...
1
vote
1answer
60 views
How to get the time when a block is received at a node?
Is there any variable in the bitcoind code that records the timestamp when a block is received for the first time by a particular node? To be more precise, for transactions, transaction information ...
1
vote
0answers
311 views
Pruning Blockstore has been running for days
After activating the core (Testnet - Pruned) with the command bitcoin-qt i received the following error:
Corrupt Block Database
I restarted the synchronization always using the Pruned mode.
The core ...
1
vote
1answer
39 views
How does a miner identify himself
There has been a new mining pool appearing after the halving called Lubian.com cf https://www.cryptoglobe.com/latest/2020/05/new-bitcoin-mining-pool-comes-out-of-nowhere-already-5th-largest/
How does ...
2
votes
1answer
48 views
Unable to replicate block header validation errors: time-too-old and time-too-new
we are playing with the regtest and we don't able to replicate the two blocks validation error managed here
https://github.com/bitcoin/bitcoin/blob/5b24f6084ede92d0f493ff416b4726245140b2c1/src/...
0
votes
4answers
1k views
Where is the data stored in Bitcoin?
Is all the data related with the transaction of bitcoin stored in blockchain or the data stored somewhere in the cloud and they are referenced from blockchain. I have this confusion because if we are ...
0
votes
1answer
181 views
Testing altcoin reward halving - Help! [closed]
I am currently working on reward halving changes for a test coin and i have added all the necessary changes but my question is how do i safely test this new halving without affecting production. I ...
0
votes
0answers
50 views
What does the version number in the blockheader represent
While looking up how a block get mined I stumbled over the version number in the header - which is used to "keep track of changes to the protocol".
But even in the last 5 blocks of the chain (at the ...
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