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[juliansantiago]

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[1715681735]

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[gweedo]

whats the difference between mining and creating a block? who does the creating?

Mining is the finding of the hash of this block. Miners find blocks and include the transactions.

[autonomous42]

Ok so, the mining comes first then? A miner finds a hash, then decides which transactions to include, then broadcasts?

I'm pretty sure the miners furiously search for a hash of all currently unconfirmed transactions. There is a nonce, or random number, that the mining software adds to the other data to be hashed in search of a hash beginning with 14 zeroes. The number of preceding zeroes is adjusted occasionally as well.

[autonomous42]

Ok so, the mining comes first then? A miner finds a hash, then decides which transactions to include, then broadcasts?

true

Now wait a minute. What about that, then, is inclusive of the previous blocks?

[solex]

Ok so, the mining comes first then? A miner finds a hash, then decides which transactions to include, then broadcasts?

true

Now wait a minute. What about that, then, is inclusive of the previous blocks?

Solo miners or pool operators collate a set of pending transactions and generate a Merkle Tree from them. http://en.wikipedia.org/wiki/Merkle_tree
It is only the top hash (Merkle root) which goes into the block header. This prevents transactions from being altered (as the top hash would be different).

It is then the block header which is hashed many times by the solo miner or the pool miners. Block header hashes have a target number of leading binary zeros, the number of which increases with difficulty. A dummy value called the nonce is incremented so that each hash of the block header is different until the target is found. Then the block is broadcast, and validated by other solo miners or pool operators. The block header hash is included in the next block header which is hashed, making the whole blockchain unalterable.

Just brilliant of Satoshi to put it all together.

[autonomous42]

How do blocks of exactly 25.00000000 BTC and no transactions happen?

[autonomous42]

How do blocks of exactly 25.00000000 BTC and no transactions happen?

The miner doesn't include transactions, and just collects the rewards.

On what basis does that happen? Not knowing anything about bitcoind or the minutiae of how the mining software or pools work, why would they not take transactions?


PS who renamed the thread and removed the OP? weird.

[K1773R]

funny the OP edited his post but forgot that others quoted his original text, morons lol...

[autonomous42]

funny the OP edited his post but forgot that others quoted his original text, morons lol...

Dunno, his question was a pretty good one. Ah well..