To generate warplib package for cairo you have to run `yarn warplib`

Newton

I used the Nethermind Warp Traspiler to translate the Solidity to Cairo successfully, but there was a problem with the test. I don't think there is this `warplib` package, `node_module` there is, but there is no python package. How do I generate python packages?


```python
from warplib.memory import wm_new
from warplib.maths.utils import felt_to_uint256
```

### How to represent / my environment
I used python virtual environment to develop cairo, and then I used this tool to convert solidity to cairo. After compiling, I reported an error and saw that `the warp-related package was not found`.

Warp Traspiler error: the warp-related package was not found. How do I generate python packages?

I am getting the following error: Cannot unpack the return value of 'is_le'. The return type is not a tuple.


This code was working for Cairo 0.9.1 but is not working any more:


`let (is_negative : felt) = is_le(x, -1)`


Does anyone know what this issue is about?


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/1104)_

Cairo 0.10.0 Error: Cannot unpack return value error

# I have a Solidity Smart contract like this:
```solidity
// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

/**
 * @title Storage
 * @dev Store & retrieve value in a variable
 */
contract Storage {

    uint256 number;

    /**
     * @dev Store value in variable
     * @param num value to store
     */
    function store(uint256 num) public {
        number = num;
    }

    /**
     * @dev Return value 
     * @return value of 'number'
     */
    function retrieve() public view returns (uint256){
        return number;
    }
}
``` 
## Which steps should I follow if I want to use kakarot?

How to use Kakarot for my Solidity Contracts?

Are transpiled contracts only interactable with the warp cli?

Is there a way to call another function or contract and 'expect it to fail' without failing the whole transaction?


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/410)_

Expect function call to fail in cairo?

How can I test on multi-chain with both Starknet and Ethereum?


ApeWorX: How can I test on multi-chain with both Starknet and Ethereum?

What is the proxy pattern and how it can help make my smart contracts upgradable in Cairo Language? Is there any standard lib for that?

What is the proxy pattern and how it can help make my smart contracts upgradable in Cairo Language?

In writing my Cairo program I have the following code:


currNumber is a storage variable:


`@storage_var`


`func currNumber() -> (res : felt):`


`end`


And we have code that calls this value and uses the currNum in a subsequent function:


`...` 


 `let currNum = currNumber.read()`


 `let (res) = findSumDigits(currNum, 0)`


`...`


﻿  



And I am getting the following error:


Expected expression of type 'felt', got '__main__.getCurrNumber.Return'.


 let (res) = findSumDigits(currNum, 0)


 ^*****^


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/835)_

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Warp Traspiler error: the warp-related package was not found. How do I generate python packages?

How to represent / my environment

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