<p>By definition a node's idea of the blockchain is among all valid versions of history the one with the most total proof of work.</p>

<p>Because chains are required to be valid, it is not possible to have a block in there that violates consensus rules. It doesn't matter what miners do; full nodes will still ignore the block entirely, as if it was never created.</p>

CC BY-SA 4.0
2019-08-19T19:35:52.467Z
2019-08-19T19:35:52.467Z
Pieter Wuille
<p>Every full node unilaterally checks each block for validity. When a block does not adhere to the consensus rules, a full node will not accept it as valid, will not consider included transactions as confirmed, and will not forward it to other nodes.</p>

<p>A similar incident happened for example in July when Antminer accidentally claimed a higher block reward than permitted in block 584,802.</p>

<p>You can read about that a bit more for example here:
<a href="https://twitter.com/bitmexresearch/status/1148989508588883970" rel="nofollow noreferrer">https://twitter.com/bitmexresearch/status/1148989508588883970</a></p>

CC BY-SA 4.0
2019-08-19T21:27:55.413Z
2019-08-19T21:27:55.413Z
Murch
<p>What happens when the last added block in a blockchain is corrupted? Is it still possible for the block to be accepted by a majority of the miners?</p>

<blockchain><blockchain-fork><block-validity>
What happens when the last added block in a blockchain is corrupted?
Mikasa
# What happens when the last added block in a blockchain is corrupted?

(Asked by: username_0 on 2019-08-19)

What happens when the last added block in a blockchain is corrupted? Is it still possible for the block to be accepted by a majority of the miners?

**Tags:** blockchain, blockchain-fork, block-validity


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## 2 answers

### Answer by username_1 on 2019-08-19. Score: 3

By definition a node's idea of the blockchain is among all valid versions of history the one with the most total proof of work.

Because chains are required to be valid, it is not possible to have a block in there that violates consensus rules. It doesn't matter what miners do; full nodes will still ignore the block entirely, as if it was never created.


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### Answer by username_2 on 2019-08-19. Score: 1

Every full node unilaterally checks each block for validity. When a block does not adhere to the consensus rules, a full node will not accept it as valid, will not consider included transactions as confirmed, and will not forward it to other nodes.

A similar incident happened for example in July when Antminer accidentally claimed a higher block reward than permitted in block 584,802.

You can read about that a bit more for example here:
<https://twitter.com/bitmexresearch/status/1148989508588883970>


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