# Failed to run hellworld-avs demo in holesky testnet

**URL:** <https://forum.eigenlayer.xyz/t/failed-to-run-hellworld-avs-demo-in-holesky-testnet/14341>\
**Category:** General\
**Created:** [January 9, 2025, 1:18am UTC](https://forum.eigenlayer.xyz/t/failed-to-run-hellworld-avs-demo-in-holesky-testnet/14341 "2025-01-09T01:18:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![d5c5](https://avatars.discourse-cdn.com/v4/letter/d/a87d85/32.png) [@d5c5](https://forum.eigenlayer.xyz/u/d5c5)\
**Post date:** [January 9, 2025, 1:18am UTC](https://forum.eigenlayer.xyz/t/failed-to-run-hellworld-avs-demo-in-holesky-testnet/14341/1 "2025-01-09T01:18:12Z")

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I’m testing “[https://github.com/Layr-Labs/hello-world-avs](https://github.com/Layr-Labs/hello-world-avs)” on Holesky’s test environment. I encountered an error, specifically that I cannot send the ‘registerAsOperator’ function. When I tried to investigate the cause, I found that the parameter signature for the ‘registerAsOperator’ function on Holesky does not match the one in hello-world-avs. However, I cannot locate the new function in the eigenlayer-contract branch.

Found in browser:  
Function: registerAsOperator(address initDelegationApprover,uint32 **allocationDelay** ,string metadataURI)

Used by me:  
Function: registerAsOperator(tuple registeringOperatorDetails,string  
metadataURI)

Since I want to test the contract on the testnet before deploying it on the mainnet, is the current testnet consistent with the mainnet? If not, what should I do to ensure that my mainnet contract will be functional?

And where can I find the new contract source code deploying in holesky?

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**Author:** ![Taidong](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.eigenlayer.xyz/taidong/32/4842_2.png) [@Taidong](https://forum.eigenlayer.xyz/u/Taidong)\
**Post date:** [January 10, 2025, 12:45pm UTC](https://forum.eigenlayer.xyz/t/failed-to-run-hellworld-avs-demo-in-holesky-testnet/14341/2 "2025-01-10T12:45:30Z")

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Hey there! Two quick things:

1. This is likely not been updated with holesky contract methods for slashing release. The team is aware of this issue and will push a fix soon! I will reply to this thread when the changes have been made so you can be aware of them.
2. Please use the support category, or better yet, the chat bot/ ticket system on our documentation website if you need support in the future! [https://docs.eigenlayer.xyz/](https://docs.eigenlayer.xyz/)