# Provider object: 🔌 connect to the network :

The first thing to do: is defined with which network you want to interact. With the Provider object, you define the network to use :

`import {Provider} from 'starknet';`

## Connect your DAPP to a Starknet node :

For a local [Pathfinder](https://github.com/eqlabs/pathfinder) node :

`const provider = new Provider({ rpc: { nodeUrl: '127.0.0.1:9545' } })`

Newton

How do I connect my DAPP to a Starknet node using starknetjs?

What is the expected blocktime for starknet mainnet?

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

What is the expected blocktime for starknet mainnet?

Hello everyone. Does anyone happen to know if there's a way to get the block hash in cario? I found out about `get_block_number` and `get_block_timestamp`, but is there something similar for block hash?

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

How to get the block hash in Cairo lang?

I try to execute a code with `get_balance_sync` method:
![get_balance_sync Cairo StarknetPy code sample](https://res.cloudinary.com/varga/image/upload/c_pad,b_auto:predominant,fl_preserve_transparency/v1670921600/code_image_spbt0g.jpg)

However, I got this error:

```
starknet_py.net.client_errors.ClientError: Client failed with code 500: {"code": "StarknetErrorCode.ENTRY_POINT_NOT_FOUND_IN_CONTRACT", "message": "Error at pc=0:10:\nGot an exception while executing a hint.\nCairo traceback (most recent call last):\nUnknown location (pc=0:228)\nUnknown location (pc=0:214)\n\nError in the called contract (0x7f81ea93daf9c49494e3131b95646c3a8df5d97d151cc6484d49eaebe3e3d0a):\nEntry point 0x2e4263afad30923c891518314c3c95dbe830a16874e8abc5777a9a20b54c76e not found in contract with class hash 0x3ae692aaf1ded26a0b58cf42490f757563850acea887ed57b4894fee8279063."}
```

Can you help me to resolve this?

StarknetPy Error in get_balance_sync (StarknetErrorCode.ENTRY_POINT_NOT_FOUND_IN_CONTRACT)

I got an error while deploying:
`{"code": "StarknetErrorCode.DEPRECATED_TRANSACTION", "message": "Deploy transaction is no longer supported."}`

Umm, cairo playground does not support deploying contracts anymore

What is the most user-friendly way to deploy contracts on starknet for now?

StarknetErrorCode.DEPRECATED_TRANSACTION while deploying StarkNet contract

# Will Kakarot be an L3 on top of the Starknet validity rollup?

Will Kakarot be an L3 on top of the Starknet validity rollup?

How do I connect my DAPP to a private Starknet network using starknetjs?

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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How do I connect my DAPP to a Starknet node using starknetjs?

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Provider object: 🔌 connect to the network :

Connect your DAPP to a Starknet node :

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