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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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1answer
144 views

If I use a MacBook Pro to mine Bitcoin (and keep records for the blockchain), how much can I earn in 1 month? [duplicate]

I know people say it is not practical to mine Bitcoins using a computer any more, but graphics cards are usually used to mine them. But suppose just for fun, I do use a MacBook Pro to mine it 8 hours ...
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5answers
77 views

Are ASICs Resistant to Malware Attacks?

One of the arguments made in favor of relying on ASIC mining hardware to secure the Bitcoin blockchain is that commodity hardware is more prone to a 51% attack since an attacker could easily infect ...
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1answer
29 views

What literal thing is determining the price of Cryptos / stocks? [duplicate]

Yes, supply and demand I know. But what literal thing is determining the price. When I see the price changing every second on Coinbase or Robinhood, what is controlling that. Is it an algorithm? What ...
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1answer
16 views

How difficulty increases to get the lucky hash in blockchain? [duplicate]

Currently first 19 zeros are required in bitcoin block hash which has become very hard. How this zeros are being controlled to increase? If it is dynamic what are the factors which has influence to ...
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2answers
81 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 ...
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2answers
584 views

How does the BTC protocol guarantee that a “main” blockchain emerges?

I'm reading up on the bitcoin/blockchain technology. Usually, the part about proof of work and how to create a block is well explained. However, what is never explained is how/why the communication of ...
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0answers
23 views

Everyone stops mining? [duplicate]

I want to learn about bitcoin/blockchains, and from what I understand so far is, new blocks are validated/continued by the finding of hashes every, 10-ish minutes (mining). My question is, if everyone ...
2
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1answer
38 views

Could a miner set a maximium transaction fee rate?

Could a miner set a maximimum transaction fee rate? I mean validate only transactions between x and y satoshis/byte? I know is not clever. Is it possible?
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1answer
63 views

What's going to happen if someone has access to my Bip32 root key?

Can my bitcoin get stolen if someone else has access to my Bip32 root key?
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0answers
36 views

How can I generate a database/list of all non-empty bitcoin addresses with their current balance?

After downloading the full blockchain, how can I parse it and generate such a database? Can you point me in the right direction?
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1answer
70 views

nLocketime error PUSH TRANSACTION ERROR: 64: NON-FINAL

Created nlocktime with electrum and used the time date feature which is using unix time instead of block height number for the locktime. SO when pushing the raw tx before its time I get code 26 ...
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0answers
29 views

To what extent is the actual downloading of blockchain data what slows down a “fresh sync”? [duplicate]

I've just sat an old computer with fresh Linux Mint and Bitcoin Core installed to sync from scratch. Since its HDD is 250 GB, I had to enable "pruned mode" since the blockchain is currently ...
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1answer
29 views

Developers, programmers new to bitcoin engineering ecosystem [closed]

Any sites, forums dedicated to developers new to bitcoin. Any recommended git repo, site that shows how to interact with a node, do .i.e. p2sh,p2pkh on testnet.
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2answers
56 views

Is this the ledger?

Lots of articles about bitcoin say that anyone can see all the transactions that have ever taken place, and they call that "the ledger." But none of those articles give a link for where to ...
0
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1answer
28 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 ...
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1answer
784 views

I have forgotten my Blockchain account password and 12 word recovery. I have the wallet id and password to the wallet. Can i get my funds back?

I have forgotten my Blockchain bitcoin account password and 12 word recovery(possibly didn't even create one). However I do have my wallet id and the password to the wallet. Is there a way to get the ...
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1answer
93 views

Best way to store fund on the lightning network

Suppose that someone want to store 0.1 bitcoin on the lightning network for a period of 1 year to use services such as buying and selling things but doesnt know which one and with who yet. What would ...
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0answers
29 views

couple years ago I set up a coinabase wallet or blockchain wallet to make a couple of purchases. How do Iretrive any bitcoin left in that wallet?

A couple of years ago I set up a bitcoin wallet on blockchain. How do I retrieve any bitcoin left in if I don't remember all my passcode info. I'm VERY tech ignorant! HELP!! I'm on disability and ...
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1answer
46 views

Understanding Transactions, Mining, and the 10 minutes block solved

I'm not entirely sure if the questions I have regard to Bitcoin all relate to each other? How do miners decide how many transactions they should have in a block in order to mine 1 bitcoin? When miners ...
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4answers
159 views

How isn't blockchain fundamentally broken?

This question is a good 3 to 5 years late on the crypto trend but nevertheless I'm still having trouble to understand. The chain works by verifying every previous block, right? How does this not ...
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2answers
59 views

How can I determine where a BTC transfer from one of my accounts to another went wrong?

I have two BTC accounts on a Ledger S Nano hardware wallet, which I can check via the Ledger Live software. I've transferred BTC many times already, to my own accounts and to other people, and never ...
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1answer
40 views

How do internet wallets connected to full blockchain nodes

How do internet wallets such as Coinbase connect to the a blockchain node? Doesn’t the node itself create a default wallet object on startup? How is this replaced by internet wallets which hold ...
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1answer
47 views

how large a block can grow?

I was looking for a blockchain exchange but I didn't see so I am posting this in Bitcoin group. Apologize if it's too naïve. I've started to learn about bitcoin and blockchains. I don't understand how ...
4
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1answer
330 views

How many BTC addresses have balance in them?

Of all the possible BTC addresses, how many have balance in them? And what percentage of the total possible addresses is that?
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1answer
93 views

How does the blockchain know if its block hashes have been tampered?

I'm dealing with some problems to finally understand how implicit consensus works and I've come across with one question. Suppose the following: A malicious miner proposes the following block to be ...
3
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1answer
78 views

What is the difference between Consensus and Distributed Consensus?

This is more of a clarification than as a question. Since I didn't have the rep to post a comment in this question, I'm putting this itself as a question. Sources I've referred till now: A ...
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0answers
150 views

Jaxx and Exodus wallet out of sync for BTC

I was using both Jaxx wallet and Exodus in parallel using the same passphrase. However my Jaxx wallet was configured to generate a new address on every transaction and Exodus wallet had a fixed ...
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2answers
76 views

Does this accurately show how a crypto-currency miner software works? [closed]

just got a question here: Does this flowchart accurately show the step-by-step workings of a typical crypto-miner software? I'm a newbie in the cryptocurrency business. Though I welcome comments and ...
0
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1answer
293 views

If only one Bitcoin miner gets the block reward, is it worth mining only for the transaction fees as a (not-so-competitive) solo miner?

I have heard (but not that knowledgeable) about mining-pools. If a weak system joins the pool, it has a chance to get a portion of the block reward, but I assume that not all of the miners are joined ...
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0answers
55 views

Bitcoin stuck in old tablet with really old wallet - Can't send out or back up

I found an old tablet I have and it had some BTC on it. I got it in 2014 and it has a wallet called 'blockchain' on it which I think is blockchain.info at the time and now blockchain.com I am trying ...
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3answers
2k views

Strategies to Reduce High Transaction Fees in a Cryptocurrency Marketplace?

I’m building a cryptocurrency marketplace where users mainly buy and sell small ticket items (worth $10 - $50) using cryptocurrency. However, the "miner fees" are making it prohibitively ...
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1answer
45 views

Stealing a correct hash because of an invalid block

Suppose that a miner find the right hashes but involuntarily or by malicious intention then create an invalid block, like trying to double spend a transaction My guess is that the moment this block is ...
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0answers
13 views

How to validate transactions in a website?

I'm learning about Bitcoin. Now, I have to build a website where some transactions must be verified as completed. I don't need to create transactions, mining, or something else, just to verify that ...
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1answer
50 views

Bitcoin - private key but forgot password, please help!

I have private key but I forgot the password, is there anyway to get my bitcoin back. Thanks, Mina
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2answers
412 views

What actually caps Bitcoin's supply at 21 million?

I have seen everywhere that the total BTC supply is permanently capped at 21 million. I understand blockchain, cryptography, SHA256, etc... generally, but where/what is actually capping the supply at ...
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1answer
46 views

Are there any Bitcoin block explorers still around that log First Seen by node data?

Title.. Hoping to find out when a historical tx went into the mempool. I'm aware this is transient data and not in the blockchain. However i'm pretty sure I remember in the old days explorers used ...
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1answer
53 views

Bitcoins sent and confirmed by blockchain. But hasn’t been recieved [duplicate]

https://btc.com/57d2819220862abf8a54f4912f3f973f0041cf8c3d64e229ff6248417cad0e73 I have sent money from cryperium. They have confirmed that the money has been sent. But i havent recieved the money at ...
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1answer
66 views

Missing bitcoin… over 6 confirmations!

Ok, so I sent a vendor 0.0046531 bitcoins using Muun wallet. The address I sent it to is 3LTJzNzbXDBDdzHPxDSQk6sucLDKPW3zmN. The blockchain explorers I have used to track the money says they were ...
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1answer
95 views

How can I split blockchain data over two hard drives?

My node has two SSDs and the first one is filling up. The second one still has ~230GB available and I would like to move old blockchain data over there to free up an equivalent amount on the first ...
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1answer
61 views

Bitcoin access for my late mommy

Mom Passed the day after Thanksgiving in Kona Hawaii. Luckily I had enough saved to get on a plane immediately after getting the same day Covid test for $250 at Seattle airport. I still had to wait at ...
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0answers
51 views

BLOCKCHAIN.INFO NO TRANSACTIONS [closed]

Long story short. Can't see transactions from blockchain.info as blockchain.com is now the website. Long story: Created a miner in 2013. Mined it from BTC Gui... and had it sent to BLO.....IN.INFO was ...
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3answers
238 views

How nodes solve cryptographic hash by random guesses in bitcoin network [duplicate]

I searched for a lot. Previous answers on the bitcoin stack exchange did not answer my question. Well, According to my research, Any node can collect a set up unconfirmed transactions into a block and ...
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1answer
54 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 ...
1
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1answer
2k views

Can I recover my Bitcoins bought in 2009? [closed]

I am a complete novice to the whole Bitcoin thing. Can someone advise me please? I bought Bitcoin in 2009 when it was first launched. I had downloaded the wallet(been told it was a Bitcoin qt wallet)...
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0answers
34 views

Bitcoin Takeover Possible? [duplicate]

I have a question / scenario im looking to understand regarding cryptos and wondered if anyone here wants to comment on the below and discuss... It goes: Given that crypto's are 100% reliant on ...
1
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1answer
53 views

How the bitcoin network solves the double-spending problem by adding all the transactions that happened at the same time into one block

According to my research, I understand if person A sends 2 BTC to person B and at the same time person A sends the same input to himself before the input is considered as spent. So, now there will be ...
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0answers
39 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
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1answer
48 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 ...
3
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2answers
3k views

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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0answers
36 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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