hi thx for your interest. for StarkEx tutorials, pls refer to this docs 🙂

https://docs.starkware.co/starkex/starkex_playground_tutorial.html

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

Newton

Hello, is there a javascript version of StarkEx playground?

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

Is there a javascript version of StarkEx playground?

# Is Kakarot zkEVM a smart contract or a blockchain?

Is Kakarot zkEVM a smart contract or a blockchain?

I'm looking for a StarkNet guide. I'm an experienced CTO and I want to know more about it, check out, and learn more. Also want to get hyped. What can you recommend to read to learn more about StarkNet?

What's the best advanced StarkNet guide?


What kind of efficiency gains can one expect from writing the contracts directly in Cairo as opposed to transpiling with warp?

What are the efficiency gains of direct Cairo vs. transpiling with warp?

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]

Hello, I am facing an issue with `starknet-devnet (v0.3.1)` . I do not manage to run RPC `starknet_addInvokeTransaction` with positional parameters; yet it works with pathfinder and other vers like `starknet_estimateFee`. It returns `int() can't convert non-string with explicit base`. It is working fine on GOERLI. I have document the case on the repo https://github.com/Shard-Labs/starknet-devnet/issues/282. Does anyone have an example of a positional request to `starknet_addInvokeTransaction` on devnet that is working? The test inside the testsuite is also using named parameters. Thank you for your help

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

Does anyone have an example of a positional request to `starknet_addInvokeTransaction` on devnet that is working?

What are multi-calls in Account Abstraction? What will it bring to the UX?

Hey!
I had a question about what would be the cleanest way to imitate a `uint32` or `uint64` in cairo. Two approaches came to mind:
1. Simply use a felt and check that is less than `2**32 - 1`
2. Pass a Uint256 and check that var.high == 0 and var.low is less than `2 ** 32 -1`

First approach seems straightforward, but I wanted to know if there was a convention for this or a better way.

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Is there a javascript version of StarkEx playground?

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