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myarbrough@oreilly.com 2014-11-05 09:17:03 -08:00
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@ -338,7 +338,7 @@ In a generation transaction, the first two fields are set to values that do not
==== Coinbase Data
Generation transactions do not have an unlocking script (a.k.a. +scriptSig+) field. Instead, this field is replaced by coinbase data, which must be between 2 and 100 bytes. Except for the first few bytes, the rest of the coinbase data can be used by miners in any way they want; it is arbitrary data.
Generation transactions do not have an unlocking script (a.k.a., +scriptSig+) field. Instead, this field is replaced by coinbase data, which must be between 2 and 100 bytes. Except for the first few bytes, the rest of the coinbase data can be used by miners in any way they want; it is arbitrary data.
In the genesis block, for example, Satoshi Nakamoto added the text "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks" in the coinbase data, using it as a proof of the date and to convey a message. Currently, miners use the coinbase data to include extra nonce values and strings identifying the mining pool, as we will see in the following sections.