- Yes, that's the recommended way going forward.
- Yes now it must be tracked manually. That way the overhead is there only if you use the feature.

_This answer was originally posted on [StarkNet Discord](https://www.newton.so/view?tags=discord)_

Newton

I'm implementing the new version and had a couple Q's:

- Is `useStarknetExecute` now the only transaction method (for multi and single calls).
- Do we update the transaction manager on our end? I seem to remember `useStarknetInvoke` also update this automatically

_This question was originally posted on [StarkNet Discord](https://www.newton.so/view?tags=discord)_

Questions about useStarknetExecute. Do we update the transaction manager on our end? [StarkNet/Cairo]

is there anything wrong with the testnet? why is it so slow now?

_This question was originally posted on [StarkNet Discord](https://www.newton.so/view?tags=discord)_

Is there anything wrong with the testnet?

Hello guys, I would like to know if CAIRO work in python3.10 venv? Because I have a problem to install python 3.9.


_This question was originally posted on [StarkNet Discord](https://www.newton.so/view?tags=discord)_

Does Cairo work in python3.10 venv? I can’t install python 3.9

Hey! The title sort of summarizes the question. I was wondering if there's any project where I can see an example of how something like `keccak256(abi.encodePacked(var1, var2, var3))`  could be achieved in starknet.

If there were a way to concatenate bytes, I think it wouldn't be too complicated, but such a string would never fit in a felt, and using a struct won't result in the same output.

So yes, my question is if there's an equivalent way to achieve this behavior in cairo.

Equivalent to Solidity's keccak256(abi.encodePacked())?

How does Argent X wallet estimate fees in Starknet before sending a tx?

I am trying to deploy my contract using this tutorial
[https://medium.com/starknet-edu/deploying-to-starknet-with-the-universal-deployer-contract-c6de07092bfb](https://medium.com/starknet-edu/deploying-to-starknet-with-the-universal-deployer-contract-c6de07092bfb)
But as I follow the steps, I got an error at the contract declaration step: `Unitialized Contract`

Trying to deploy contract with Argent guide but got error Unitialized Contract

My Alchemy dashboard usage is low?

Why am I having trouble deploying my Cairo contract?

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Questions about useStarknetExecute. Do we update the transaction manager on our end? [StarkNet/Cairo]

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