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Questions concerned with the technical details of mining such as blockheader assembly, or details in the mining algorithm. Questions about the conceptual nature of mining should rather be tagged with [mining-theory].

7 votes
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How hard is it to alter a block after it was found?

Once a miner has found a block, how easy it is for him to add or remove a tx included in that very block? It is impossible. The solved block depends on every byte of transaction data, nothing ca …
morsecoder's user avatar
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3 votes
Accepted

If block sizes go up, won't sigop limits have to change too?

Yes, the maximum number of signature operations per block also need to change. It may change dynamically with the block size limit. The code currently assumes a ratio of MAX_BLOCK_SIZE to MAX_BLOCK_SI …
morsecoder's user avatar
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13 votes
Accepted

What is SPV mining, and how did it (inadvertently) cause the fork after BIP66 was activated?

SPV mining is the term commonly used for 'less-than-full-node-validation' mining. It usually means that miners skip the verification of the block and the transactions within, and immediately start min …
morsecoder's user avatar
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