4

This is most likely a scam! there have been a similar question recently Why do I have to deposit BTC as missing turnover There is no need to send bitcoin or money to receive a private key or unlock a bitcoin wallet, be careful.


4

Blockchain Explorer says received but it's not received yet! That's not how Bitcoin works. All computer-based wallets, including your friend's, have a copy of the blockchain (or have indirect access to a copy). If the blockchain includes your transaction, then the money has been received. All copies of the blockchain are eventually identical, only the last ...


3

Something that is very similar to what you describe is the concept of "Uncle Blocks" used in Ethereum. Even there, though, there are no partial blocks and nobody would continue to mine on a "half-finished" block. Ethereum has significantly shorter block intervals which causes multiple blocks at the same height to be found often and allowing to reference them ...


3

What happens if now the 10% fork (chain A) will mine a block and send it to the network? When a miner building on top of chain A finds a valid block, it will relay the block to the rest of the network. For convention let us assume the fork (chain A and chain B) has happened at block height N. This is how different nodes on the network will react when they ...


3

Bitcoin does not work on an account model but operates on an UTXO (unspent transaction output) model. When you send bitcoins to an address, what you are essentially doing is locking those bitcoins in a mathematical equation. Spending those coins requires that you provide the correct unlocking condition (most often signature and public key associated with ...


3

No, this is not possible. Energy sources are not part of the blockchain.


2

I don't think this is possible; you'd have multiple node instances trying to read/write a single data directory. This is not the intended operation, you'd likely end up with corrupt data. If you must run multiple independent nodes and are worried about storage requirements, I'd recommend looking into 'pruning mode', it will limit the storage requirements ...


2

In the original source code there were little restrictions on what could be in the coinbase data of the coinbase transaction. I think the only restriction was that the coinbase data should be between 2 to 100 bytes. However, this lack of restriction on what can be within the coinbase data brought up a vulnerability. It was perfectly legal for miners to ...


2

The transaction is confirmed. Make sure that you have sent to the correct address (your friend's address 37ZyDkjmMEkTVjeuLcjH3p5AQEZF5tpr1E). If you are sure then your friend is trying to scam you because in transaction https://blockstream.info/tx/cb2b8b9fe545ba2705f9831e33417cdf3c4c749eb738cb359d3c3af4834b2768 the UTXO you sent to your friend has been ...


2

Building a chain longer than the best chain would require someone to have more Proof of Work hashpower than 51% or more of the total Bitcoin network hashpower. The unlikelihood of this happening is the guarantee that the longest chain is the best chain. To build a one block longer chain you'd have to assemble a block and find a nonce that produces a ...


2

As a third party with only the public blockchain data, there is likely no way to accurately fit a random Bitcoin transaction into the double-entry accounting method. This is because a single Bitcoin transaction could represent the economic activity and payments of many different people, or of many different transactions. To say this differently: transaction ...


1

Increasing the nonce size would not increase or decrease the expected block time. The block time is maintained via the difficulty adjustment algorithm, which adjusts the network difficulty according to the apparent time it took for the last 2016 blocks to be found. How quickly blocks are found can thus be used to estimate how many hashes/second the ...


1

size refers to the size of the block, which is 80 bytes for the header + sum(tx_sizes). As pointed out in the comments, this includes the segwit data and is meant to match the actual, on disk size of the block. bits refers to nBits, which encodes the target difficulty for the block. You can see an explanation of the encoding scheme here. chainwork ...


1

When exactly does the receiving party receives their payment. This is considered to have happened as soon as the transaction is included in a newly mined block and that block starts to propagate through the Bitcoin network. The recipient may not find out that they have received the money until their particular node (e.g. wallet) receives a copy of that ...


1

Within the Bitcoin protocol, each Bitcoin is represented as 100000000 satoshis. Therefore, you can divide bitcoin up with a precision of 0.00000001. In a transaction, the number of satoshis being delivered to each output is recorded, along with a record of which previous output is being spent. The fee is then derived from sum(Inputs) - sum(Outputs). The ...


1

This means you have to wait until the transaction has 3 confirmations before you can use it on Paxful. The time needed for each confirmation is random, but averages about 10 minutes. By the time you read this, your transaction probably will have 3 confirmations. If after several hours it still says 0/3, then go and read Why is my transaction not getting ...


1

You can tell bitcoind to have 0 connections using: bitcoind -maxconnections=0


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