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?

ETH blocks contain logsbloom, giving a partial indication of what events occurred in the block without the need to search every transaction receipt. Many ETH nodes and services also offer “filter” functions.

Is there a way to find events in a block without getting receipt for all transactions on Starknet? 

(I’m using starknet_py but open to any ideas)

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

Is there a way to find events in a block without getting receipt for all transactions on Starknet? 


I'm currently trying to transpile an ERC 721 contract I have that uses openzeppelin libraries, is that possible?

I am currently running this code

```
func main() {

    let x = [ap];
    [ap] = 1, ap++;

    [ap] = 2, ap++;

    [ap] = x, ap++;
    jmp rel -1;  // Jump to the previous instruction.
}

And what is happening is that "x" is alternating between 1 and 2 and I couldn't figure out why.

Also, it wasn't very clear to me what a "Revoked Reference" means. Is it when you cannot access a certain [ap] when running a specific function?

This is the link to the exercise:
https://www.cairo-lang.org/docs/how_cairo_works/consts.html#revoked-references

Revoked References exercise from Cairo-lang

There are many people who are pretty new to Cairo Language, so this thread is about some good resources, to begin with. What projects, educational courses, Github Repos etc. about StarkNet can you recommend?

---
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What resources (Github repos, projects) do you follow about Cairo Language? Why?

Another question I have is:

**What's easier, adapt the create2 trick in Solidity then transpile or transpile first then adapt in Cairo?**

---

### *From Newton AI:*

*"Create2" is a feature in Solidity, the programming language used to write smart contracts for the Ethereum blockchain. It allows the creation of new contract accounts using a deterministic algorithm, rather than having to send a transaction to create the contract like with the original "create" function. This can be useful in certain situations, such as when creating a contract that is intended to be deployed at a specific address.*

*Transpiling is the process of converting code written in one programming language into another language. This can be useful if a piece of code needs to be run on a platform that only supports a different language, or if it is desired to use a different language's features or syntax.*


Did you change the factory/create2 part (to compute pool addresses)?

Another vanilla Cairo question, what are the sorts of references, i.e. ids that can be modified by hints? relatively important to work against an evil prover

presumably not locals or tempvars, but say, implicit references, or the two(?) kinds of let statements (expressions and references)

maybe if there's some documentation i don't know about re: all the id types, relocatable values and so on,

also maybe, is there a pattern that can be used for function pointers?

Another vanilla Cairo question, what are the sorts of references


I built a module with Cairo language and I would like to unit test it. The contract is pretty simple : it manages a list of authorized addresses and provide some "modifier" functions to help.


I have taken the sample unit testing code from the documentation but nothing is referring about sending an account address to a function with python.


How should I proceed ?


Thanks in advance



ㅤ
_This question was originally posted on [Stack Overflow](https://stackoverflow.com/questions/73034919/testing-starknet-cairo-contract-function-with-address)_

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