# Hello starknet fam!

I heard with the last release of protostar it is now possible to make multiple call to different contracts functions in one protostar invoke CLI.

Can someone show me a good exemple on how to use it?

Like multicall with approve and swap.

Thank you very much!

Satsgas

How to use multicall with protostar 0.9.0?

How do I transform data from javascript to Cairo?

Hey everyone, is it possible to use argentx to sign in/authenticate user to a off-chain api/db

What I want to do is store some data off chain for each user(wallet)

I have seen that metamask/etherem has 'personal_sign' rpc method that can be used for something like this

Is there anything like this available in starknet ecosystem?

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

Is it possible to use ArgentX to sign in user to a off-chain api/db?

Please make the function return the floor of the value so we are returned a felt


Test 1


Input(s): 4


Output(s): 2


Test 2


Input(s): 16


Output(s): 4


Test 3


Input(s): 127


Output(s): 6


Test 4


Input(s): 1099511600000


Output(s): 39


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/974)_

How do I write a log based 2 function in Cairo?

What is the maximum value a `uint` can store?

I need to understand a couple of things:

1. What is the maximum value `a felt` and `uint` can store?
2. Are the maximum values stored in felt and uint the same?

---
This question is participating in[ Newton Bounties | Incentivized Test Program](https://newtonso.notion.site/Newton-Bounties-Incentivized-Test-Program-94322ad48e7d40a3adcf36f6b26174cd) Every verified valid question gets $10 USDC (mainnet)

What is the maximum value an uint and felt can store in Cairo Language?

Why will I use events in the Cairo language? Can I use it on a front-end client application side?

Why will I use events in Cairo language?

is there an example of migration scripts somewhere ?

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

Is there an example of migration scripts somewhere [Cairo/StarkNet]?

# Is Kakarot zkEVM a blockchain?

Does Kakarot have its own consensus, finality, commitment to L1, blocks, etc.?

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How to use multicall with protostar 0.9.0?

Hello starknet fam!

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