Currently, using `setup` function in a test suite is the only way to minimize the number of deploys. We may add such functionality in the future.
https://github.com/software-mansion/protostar/issues/488

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

Newton

Hello friends, is there a way to cache context + StarkNet state? Or save and load on a fresh network. I'm looking at ways to avoid deploying the same contracts every time before running tests.

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

Is there a way to cache context + StarkNet state?

Hey,
As each storage value is by default initialized to 0, does writing it to zero actually do something? Does it use storage in layer 1 with value 0? Or does it just do nothing?
Should I check that the value I want to write is different than 0 before writing it otherwise I will waste storage?

The same idea: does writing a storage value to 0 free storage on l1

Does writing it to zero actually do something?

Given a felt, I would like to get the sum of the digits. For example, 123 would be 1 + 2 + 3 = 6.


Test 1


Input(s): 123


Output(s): 6


Test 2


Input(s): 577


Output(s): 19


Test 3


Input(s): 88888


Output(s): 40


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/990)_

How to calculate the sum of the digits of a felt in Cairo?

There are a bunch of questions about key storage in a new "Account Abstraction" paradigm.
1. Can I recover my key if I lose it?
2. Can I have a key-less wallet?
3. Can I easily create new wallets like in Metamask "Add Account" with only 1 seed phrase?
---

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How will work an account abstaction wallet with the key?

Can tempvar be of a different type, say U256?

let's say

`tempvar foo: U256 = bar;` and bar being a U256?

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

Can tempvar be of a different type, say U256?

Hey, is there anyway to debug Cairo contracts in hardhat environment? Something like hardhat console in Solidity?

Hey, is there anyway to debug Cairo contracts in hardhat environment? Something like hardhat console in solidity

### *From Newton AI*
*"Assembly" is a low-level language that is used to write smart contracts for the Ethereum Virtual Machine (EVM). It is similar to machine code, which is the code that is run directly on a computer's central processing unit (CPU). Assembly is often used in Solidity contracts to perform complex tasks or to optimize the performance of the contract.*

*If a Solidity contract contains assembly code, it is important to be careful when working with it, as it can be difficult to read and understand. Additionally, certain assembly instructions, known as "special EVM calls," can have unintended consequences if not used correctly. For example, some special EVM calls can cause a contract to consume an excessive amount of gas, which can make it more expensive for users to interact with the contract.*

*It is generally recommended to avoid using assembly in Solidity contracts if possible, as it can make the contract more difficult to understand and maintain. If you do need to use assembly, it is important to thoroughly test and debug the contract to ensure that it functions as intended.*

What if my solidity contract contains Assembly or special EVM calls ?

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?

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