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Must a block contain a coinbase transaction? If so, how is this enforced?
Must a Block contain a coinbase transaction?
Answers
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Every block must include one or more transactions. The first one of these transactions must be a coinbase transaction which should collect and spend the block reward and any transaction fees paid by transactions included in this block.
Bitcoin Foundation Developer Guide— https://bitcoin.org/en/developer-guide#transaction-data
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Yes, it must.
Block without coinbase transaction will be rejected by network.
From the Protocol, rule #6:
First transaction must be coinbase (i.e. only 1 input, with hash=0, n=-1), the rest must not be
The coinbase transaction is important as the mark of bitcoin generation. But what would it be for when the last bitcoin were mined? – Henrique Barcelos – 2016-01-28T13:36:21.110
related: What is the coinbase?
– Murch – 2015-11-07T15:02:07.420