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2

When a transaction happen, the miners compute a value called "prof of work". This value is calculated in order to get a 0 value (or something very closed to 0) for the hash of the value + the transaction + the last pow. The miner does not perform the PoW on each transaction individually, but on a set of transactions, whose combined size is less than ...


3

Bitcoin Core does not have mining code anymore, at least for mainnet. You cannot use Bitcoin Core to mine. Instead you will have to download other mining software such as cgminer or bfgminer. However, none of those software include support for CPU mining because mining with CPUs (and even GPUs) is not efficient nor worth the cost. Mining these days is done ...


0

If I undestend the your question, you referer to the lockTime inside the transaction and not the block timestamp. The lockTime is a int value, and this value rappresent "When the transaction can be unlockd to an inputs" and not "When the transaction was published" Lock time: Defines the first instant in which the transaction is considered valid and can be ...


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The RPC cookie file is only for local authentication of bitcoin-cli. For external applications, you should use rpcauth= lines in bitcoin.conf. A tool for generating these lines given a username and password is in the repository.


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Miners are incentivized to always mine at the longest valid chain tip. If there were incentives to not mine on the longest known chain, then we would expect the network to be unable to maintain consensus on the blockchain's state. And without that, it would be impossible to build a reliable financial system. So it isn't about 'miners conceding a shorter ...


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