Must a Block contain a coinbase transaction?

Question

Must a block contain a coinbase transaction? If so, how is this enforced?

related: [What is the coinbase?](http://bitcoin.stackexchange.com/q/4571/5406) — Murch, Nov 07 '15 at 15:02

score 7 · Answer 1 · edited Sep 02 '14 at 08:02

7

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

edited Sep 02 '14 at 08:02

Mathias711

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answered Sep 02 '14 at 03:59

amaclin

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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 Jan 28 '16 at 13:36

score 5 · Accepted Answer · edited Sep 02 '14 at 08:00

5

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

edited Sep 02 '14 at 08:00

Mathias711

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answered Sep 02 '14 at 04:16

Kinnard Hockenhull

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Must a Block contain a coinbase transaction?

2 Answers2