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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Blockchain website QR Code 500 internal server error

Hi there's 500 error message at the QR bitcoin generated code its about 3months ago still not fixed i contact blockchain but no answer Example You cannot generated QR code using V2 js payment So what'...
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I cannot locate which bit coin wallet my funds have gone to

I sent bit coin from 2 external accounts to the same bit coin wallet which were completed on the 4th March 2021. My problem is that I do not know which wallets they have gone to. I cannot find these ...
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Classifying Miners based on their Location

Is there any way to classify the bitcoin miners based on their geographical locations? Is there any possibility of doing so for the participants in cooperative mining as well? Thank you
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I can withdraw my BTC on cryptoayo and they insisting on me to pay an amount …?? How can one unlock block chain and be independent and withdraw? [duplicate]

Hello guys ...Im asking how can I withdraw from cryptoayo and there is a block chain that doesn't wanna release my current balance and it's 23,825 been trading on auto trading for six months
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Where did my Bitcoin go? Please help!

Can someone please help me understand what happened here? Did I get hacked? Or is this sitting in an exchange or wallet somewhere that I can’t figure out. Can someone help me figure out what exchange ...
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To be blunt bought bitcoin in 2009 at 25 cents have not touched it

I am hoping you can help I read through a few of you answers to other inquiries and as per my research you are very well versersed. I acquired Bitcoin back when it first came out of trading at 0.0008 ...
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Convert my ERC20 Theta to Theta Main Network [closed]

"I was lucky in Parenthesis" Literally, About 8months ago I tried to Send my ERC20 Theta to Binance not knowing that I had sent my ERC20 Theta. Well, Binance Changed me $50 to fix the issue. ...
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What happens if everyone disconnected from the blockchain

What would happen if for some reason, every computer connected to the blockchain was disconnected, and no peer-to-peer connection was established with the blockchain protocol between 2 users. Would ...
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RamenSwap's RAMEN-BNB LP's and RAMEN-BUSD LP's conversion rates [closed]

I have a question. Yesterday I tried with RamenSwap, specially RAMEN-BNB LP and RAMEN-BUSD LP. I would like to know how to calculate how much Ramen and BNB, or how much Ramen and BUSD I am supposed to ...
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My Bitcoin was transferred to someone’s address from my blockchain wallet!

Ok I have done research on my situation and this is what I have found. On 1/17/2021 I tried to login to my blockchain wallet and the captcha was glitching. It asked like 10 times! So I sent blockchain ...
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Unable to view coinbase transactions on blockchain.com

I'm trying to view some of the transactions I've made on coinbase on blockchain.com. I copied my btc wallet address from coinbase and searched it on blockchain.com -- nothing showed up. Why is this ...
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transferring funds from bittrex to binance

I want transfer a btc from bittrex to binance but they are telling me that they are supporting only non segwit adress. I don’t know if my btc adress In binance it’s non segwit too. Thank u
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what is math behind elliptic curve? (duplicate) [duplicate]

I have seen many videos regarding the math behind the bitcoin elliptical curve but none of them showing the public key generation they are just defining few steps. i need complete math behind the ...
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Unconfirmed transaction and expired address help

I have one unconfirmed transaction and now the expired address. I cannot abandon the transition because the writing is gray, +24h hours have passed (the arrival was expected in 8 hours...) and no ...
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Bitcoin Address Expired

so I sent bitcoin to an address before it expired but before it could expire it didn't arrive to that address yet, would it still reach that address anyways or is it that when the address expires that ...
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Is there a service that shows up used addresses containing a substring?

Is there a service that searches the blockchain with a string or possibly a regex to find out a set of possible addresses, say if I only know a half of a public address?
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Why doesn't Bitcoin use a DHT to store its blockchain?

Why doesn't Bitcoin store its blockchain in a DHT, but instead makes each (full) node store the entire blockchain? related questions: "Why doesn't Bitcoin use a DHT for choosing peers?" and &...
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Scammed by Bitcoin Recovery Expert [duplicate]

We were initially scammed for 1000.00 through blockchain. So then we did some research online about fraud recovery experts. We came across a site called stallionedge.tech and their clients had rave ...
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Does Bisq somehow use the Bitcoin blockchain for recording trades?

I just noticed that, after accepting a trade to buy BTC for fiat, Bisq says: Deposit transaction has been published. You need to wait for at least one blockchain confirmation before starting the ...
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What are the sources of entropy in blockchain

I have little understanding of what entropy is and its specific role in blockchain. What I understand is that they're sources of randomness. From that, I'm able to infer these sources in blockchain ...
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Is it safest to double check my new bitcoin address never showed up in the Ledger (the blockchain) before?

I just noticed in my Coinbase Pro, I can click deposit, BTC, and get a brand new address every time. It probably is due to "address is very cheap". It can be just a new pair of private key ...
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Is it possible to get a monthly “fiat/altcoin allowance” from simply “locking” your Bitcoins in a pure smart contract?

Let's suppose that Mr. John Doe has somehow managed to accumulate 10 BTC. He holds on to them for dear life as it's his one and only savings/lifeline. He has essentially zero fiat money. Only a bank ...
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What are the benifits of using Compressed Bitcoin Addresses rather than Uncompressed addresses if same length?

They are both in base58, both 34 characters long, so where exactly is the space saved? When converted to binary is there one less bit on the compressed key as opposed to the uncompressed one? (This is ...
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blockchain parser

Hi everyone, I have the following script for parsing blockchain blocks but it parse one block at a time and output is not printing in a file. whereby I want to use the directory where the blocks are ...
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is there some one expert with the btc recovery tool?

trying to use btc recovery tool , installed every thing , python 2.7 and all the required pibs . followed tutorials . actually i need to find second password so am using the command i.e c:\python27\...
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Is there any reason for an alternative Bitcoin implementation to use Berkeley DB?

The primary reason Bitcoin's C++ reference implementation uses Berkeley DB 4.8 seems to be backwards compatibility. It doesn't appear that BDB4.8 (or BDB at all for that matter) has any superior ...
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Is it possible to derive bitcoin adress from blockchain.com id? [closed]

so here is the situation: my friend lost password to his "blockchain.com" wallet. He opened it in 2015 approx. And asked me to help get access again to it. He even doesn't remember are the ...
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Blockchain Login

We're working on a research based on the blockchain and I can't understand a point about login authentication. As we all know, blockchain is distributed or decentralized system, there is no central ...
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1answer
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How are the nBits of a block calculated?

So I've been trying to figure out how the nBits of a block is calculated, but I can't seem to come up with an answer. I know (think) that it's based off the difficulty of the block, but I'm still not ...
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How is the Target Hash determined?

So, I understand how the amount of leading 0's are calculated, but how is the hexadecimal that come after the leading 0's calculated? For example, the previous mined blocks hash was ...
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How does solving a block work in relation to the first letter/number after the 0's?

I did a terrible job of explaining it in the title so I'll explain here. Say the target hash to solve for a block is 00004aef... etc. does that mean that you can't solve the block if you get 00005fad (...
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Is there a way to only sync up to a certain block?

I am planning on doing some transaction analysis on the blockchain, however, I only want to do it on a small part of the blockchain first and then run it on the full blockchain later on. I have ...
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Why should I care about my transactions ever reaching the blockchain if I can spend them while unconfirmed?

From what I understand, I can use unconfirmed transactions because they are essentially already confirmed, they just need to reach the blockchain. This can create a chain of unconfirmed transactions, ...
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What is the official explorer and value API for Bitcoin?

I am new to cryptocurrency development, and I have noticed that Bitcoin has an official wallet for both Desktop and Mobile (correct me if I am wrong). My question is, does Bitcoin have an official ...
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Can we look at how long it took to solve for the most recent block in the blockchain? (and how?)

For example, can we see, the latest block, somebody got lucky and solved it in 1 minute, but then the next block, nobody solved it until 18 minutes later? (and how can we see it?)
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Bitcoin wallet showing balance, Blockchain receiving address shows 0.00, wallet is from 2009 and hasn't been synced

Old wallet, like from the first client, Has not been synced for at least 7 years. BTC balance shown, 0 pend, 0 available and blockchain address shows 0 balance. Still waiting for entire blockchain to ...
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Is it true that all the bitcoins in existence are on the blockchain (the ledge), but it just depends on who the owner (address) is?

It seems that for the 18.5 million bitcoins generated, plus even the 6.25 bitcoins that were rewards just 10 minutes ago, are all recorded in the blockchain (the ledger), but it just depends on who ...
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1answer
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Does the Merkle Root get constantly updated inside the block or does it only get added once the block is completed?

So, pretty much just the title. I'm just wondering how the Merkle Root works exactly. I know it's the result of pairing transactions and then hashing them until the last transaction in the block, but ...
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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 ...
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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 ...
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Is one blockchain of one exchange place the same blockchain used in other exchange places?

Sorry if the title is confusing, here is what I mean. I recently threw some fiats in Kraken and invested in Bitcoin, the first interrogation I had was "Can I see my transaction publicly on the ...
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How many computers are connected to the “Ledger” or the Blockchain of Bitcoin?

Somebody asked me about Bitcoin and I explained to him many many computers are connected to the Blockchain to keep records of all the accounts (or to keep addresses of the bitcoin and owner?). But how ...
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End to end bitcoin transaction flow

My understanding on bitcoin blockchain technology after going through some articles in past few days. I'm not sure that my understanding is 100% correct. I'm writing so that someone can correct me ...
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1answer
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How basecoin transaction is added to a block?

I'm new to blockchain and bitcoin. In my understanding, miners are trying to find a nonce that is added to a block, and then the hash of the block will have some zeros at first and the first ...
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blockchain scanning

Hello friends please let me know that is there any script that can scan the entire blockchain and extract the signature values and find the match of given input. lets suppose i give the input "...
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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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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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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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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
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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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