Questions tagged [blockchain]
The blockchain is the journal of all confirmed Bitcoin transactions. It consists of a linked sequence of blocks and each block contains a list of transactions. For questions about the eponymous company or its products please use [blockchain.info]!
Deleting data in blockchain
I have read that block in blockchain is immutable since the next block is storing the hash of previous block . What if , to remove a block from the blockchain , I set the "previous hash" of ...
Bitcoin Inscription Ordinals Store Sourcecode [closed]
Is there a use case to publish source code of any kind into the Bitcoin Blockchain using Ordinals?
My multibit core synchronization is stuck Whats the reason [duplicate]
For the past six days since I downloaded the multibit core, I wanted to recover my wallet I still have my recovery phrase and password, and open the multibit core and the wallet was synchronization ...
The One Thing That’s Stopping Me From Accessing My Crypto Wallet (Hint: It’s Not the Seed Phrase)
Requirement: Recover crypto What I possess: I have a 12 word seed phrase, (Though I am not exactly sure of the organization that generated it). I have the public address through which (blockchain.com ...
What tools are useful for Bitcoin Forensic?
Best wishes of health to all. After receiving several clients seeking advice, we need to equip ourselves with some tools that allow us to make simple reports on blockchain forensic, especially on ...
Size of the `chainstate/` dir vary from node to node
I run 2 nodes: a non-pruned, txindex=1 node that has been running for years (I can't tell exactly but I think I have been moving the same datadir around since 2014/15), core v23.0.0 a pruned node ...
How did Satoshi Nakamoto create the first Bitcoin? The Genesis Block
How did Satoshi Nakamoto create the first Bitcoin? I have never read any statement where he recommends specific tools like CGMiner. You can't mine with the Bitcoin Core software. Actually, Bitcoin ...
I was recently contacted by blockchain, saying I have money in wallet,account is frozen ,and can recover money. Is this legit? Can't remember wallet
I was recently contacted by blockchain Acces UK claiming that I had created a bitcoin wallet years ago. Was informed wallet has 4.2 BTC coins in it which is equivalent to almost $40,000. The account ...
Can I delete blk*.dat files?
Since bitcoin validates blockchain by the hash of older blocks recursively; Can I just keep the last blk*.dat file and delete the rest while the bitcoin core is downloading and validating the ...
Why do many of the early bitcoin addresses receive small transactions many years later? [duplicate]
For example... https://www.blockchain.com/explorer/addresses/btc/1NHHWnZKTetjZZfAbVjTS9EHQafdH6xn8a ...receives a block reward of 50 BTC in 2009 and then transactions in 2019, 2020, 2021 for tiny ...
Is it possible to add custom data on blockchains transaction such as a payment reference?
As we traditional bank it is possible to add a reference when sending money away. Is it possible to put some short custom data when sending a blockchain transaction, such as payment reference ? I'm ...
Downgrading Bitcoin Core 24.99 (latest source code) to 24.0.1
I wanted to build Bitcoin Core myself, so I followed this official guide, but in the process I failed to realize that by cloning the git repo I would just get the latest source code, not the latest ...
Understanding how ordinals work with the Bitcoin blockchain. What is exactly stored on the blockchain?
Supposedly someone uploaded a Doom clone to the bitcoin blockchain: https://ordinals.com/content/521f8eccffa4c41a3a7728dd012ea5a4a02feed81f41159231251ecf1e5c79dai0 But I'm a bit confused on exactly ...
Is bitcoin bonus and cloud mining real? [duplicate]
I received an email saying I have so much money from a cloud mining app that I set up using my phone and the app connected with my IP address.. I didn't really pay to much attention to the app so I ...
Follow-up to Segwit: Arbitrary data storage in witness?
In 2017 a question about Segwit: Arbitrary data storage in witness? asked whether people wanting to store more data in the blockchain than OP_RETURN allows could instead store data in the witness ...