<p>The hydra-node will automatically <code>Contest</code> any transaction it sees on the chain that tries to <code>Close</code> (or <code>Contest</code>!) the head with an invalid or not up-to-date snapshot. There is no need for the operator to do anything, but it might be useful in some scenarios to be able to do so.</p>

CC BY-SA 4.0
2022-10-10T16:25:12.517Z
2022-10-10T16:25:12.517Z
insitu
<p>Given that a participant of a hydra head posts an incorrect (not the latest) snapshot to close the head, does the hydra node automatically contest this? Or do we, the operator of that head, need to use the API to manually contest?</p>

<hydra>
Does the hydra node automaticly contest an invalid snapshot?
# Does the hydra node automaticly contest an invalid snapshot?

(Asked by: username_0 on 2022-10-10)

Given that a participant of a hydra head posts an incorrect (not the latest) snapshot to close the head, does the hydra node automatically contest this? Or do we, the operator of that head, need to use the API to manually contest?

**Tags:** hydra

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## 1 answers

### Answer by username_1 on 2022-10-10. Score: 2 | Accepted answer

The hydra-node will automatically `Contest` any transaction it sees on the chain that tries to `Close` (or `Contest`!) the head with an invalid or not up-to-date snapshot. There is no need for the operator to do anything, but it might be useful in some scenarios to be able to do so.


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