<p>There’s no such thing as a block without a coinbase transaction. Even if the block reward plus fees is zero, it is still a mandatory transaction at the start of every block, it just pays nothing.</p>

CC BY-SA 4.0
2021-04-22T09:08:34.957Z
2021-04-22T09:08:34.957Z
Claris
<p>The nonce header of a block has 32 bits. The vast majority of the time, none of the 2^32 nonces will result in a block hash below the target. So to continue mining, miners usually change the <a href="https://bitcoin.stackexchange.com/questions/5048/what-is-the-extranonce">extraNonce</a> in the coinbase transaction. But what will happen once all the bitcoins have been mined and there is no coinbase transaction anymore? I know this will only happen in 2140, but have we thought of a way to change the nonce range when it will be the case?</p>
<p>Thank you for your help.</p>

<nonce><mining-technical-details>
How will mining work after 2140?
JacopoStanchi
# How will mining work after 2140?

(Asked by: username_0 on 2021-04-22)

The nonce header of a block has 32 bits. The vast majority of the time, none of the 2^32 nonces will result in a block hash below the target. So to continue mining, miners usually change the [extraNonce](https://bitcoin.stackexchange.com/questions/5048/what-is-the-extranonce) in the coinbase transaction. But what will happen once all the bitcoins have been mined and there is no coinbase transaction anymore? I know this will only happen in 2140, but have we thought of a way to change the nonce range when it will be the case?

Thank you for your help.

**Tags:** nonce, mining-technical-details


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## 1 answers

### Answer by username_1 on 2021-04-22. Score: 8 | Accepted answer

There’s no such thing as a block without a coinbase transaction. Even if the block reward plus fees is zero, it is still a mandatory transaction at the start of every block, it just pays nothing.


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