23 Feb '14, 6pm

Bitcoin mining the hard way: the algorithms, protocols, and bytes

Bitcoin mining the hard way: the algorithms, protocols, and bytes

The block header contains a handful of fields that describe the block. The first field in the block is the protocol version. It is followed by the hash of the previous block in the blockchain, which ensures all the blocks form an unbroken sequence in the blockchain. (Inconveniently, the hash is reversed in the header.) The next field is the Merkle root ,[4] a special hash of all the transactions in the block. This is also a key part of Bitcoin security, since it ensures that transactions cannot be changed once they are part of a block.[5] Next is a (moderately accurate) timestamp of the block, followed by the mining difficulty value bits .[3] Finally, the nonce is an arbitrary value that is incremented on each hash attempt to provide a new hash value. The tricky part of mining is finding a nonce that works.

Full article: http://www.righto.com/2014/02/bitcoin-mining-hard-way-alg...

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