for more details questions related to ArgentX, pls use their official server 🙂

https://discord.gg/argenthq

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

Newton

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?

Hi, just saw starknet.js latest is now 4.4 and not 3.x anymore. Do you plan to move the that release at what horizon? Is there some known issues staying with 3.x and working with starknet-react?

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

Is there any issue between using 4.4 and 3.x starknet.js?

Hello, Do I understand this correctly: Pathfinder JSON-RPC V0.1.0 does not support InvokeTXNV1 yet, right? At least, I do not `nonce` in `add_invoke_transaction`.

Do you plan to add it in JSON-RPC V0.1.0 like devnet (not being compliant to the spec) or will you introduce it with JSON-RPC V0.2.0?

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

Can anyone explain Pathfinder JSON-RPC InvokeTXNV1?

How do I connect my wallet to my Pathfinder node?

Why am I getting an `account __execute__` error message `ape_starknet.exceptions.StarknetProviderError: Can only send invoke transaction to an account execute method`?


ApeWorX: Why am I getting an "account __execute__" error message?

How does Argent X wallet estimate fees in Starknet before sending a tx?

Hey guys,
I'm wondering:
- What **hashing functions** are available now with Cairo?
- What are the **advantages/disadvantages** of each, like computation, security?

So far I know some:
- [keccak](https://github.com/starkware-libs/cairo-lang/tree/master/src/starkware/cairo/common/cairo_keccak)
- Pedersen hash, which can be used to hash chain, [here](https://www.newton.so/view/63427472405280f6d1cf502d)
- [sha256 extension](https://github.com/cartridge-gg/cairo-sha256) of the starkware implementation which can Computes SHA256 of 'input'. Inputs of arbitrary length are supported.

Happy hashing :)



What hashing functions are available in Cairo? How are they secure?

Hello, I deployed my contract using Argent X.
I click on "Developer settings" and then "Smart contract developement". I declare and deploy the contract.
Also used [this guide](https://www.newton.so/view/63a1890e581919f84b2a4c51) and it helped me.

But the contract is not automatically verified on starkscan or voyager. What should I do to get verified?

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

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