This error means that the function you tried to call does not exist in the contract (`AccountClient.get_balance()` takes `token_address` as optional input, and calls `"balanceOf"` function on the contract deployed at token_address).

Your code is almost correct, except for the last part, where you specify `token_address` in
```call_result = account_client_testnet.get_balance_sync()```


So, the full code for getting the balance of an account should be:
```
account = AccountClient(
    client=GatewayClient(net="mainnet"),
    address="0x07f81ea93daf9c49494e3131b95646c3a8df5d97d151cc6484d49eaebe3e3d0a",
    key_pair=KeyPair(private_key=123, public_key=456),
    chain=StarknetChainId.MAINNET,
)
balance = account.get_balance_sync()
```

Newton

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 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?

How to convert tokens on starknet? Any DEXs AMMs?

Something that isn't on testnet.

Am going through all these projects on the ecosystem page but am coming up with nothing.

Would be nice if there was a DEX/AMM section ... instead of making people go through all those projects one by one to see what they actually do.

I'm up to Magnety ...

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

How to convert tokens on starknet? Any DEXs AMMs?


Howdy.


I am trying to dev against the starknet devnet to build my frontend and am experiencing some issues. With argent, it seems that the version in the chromestore isn't up to date with the devnet's fee token, so I can create an account and fund it, but still not be able to do any transactions.


When I try to build from source, I get an error about something involving a react server or something.


Trying braavos, I am able to transact against dev net (invoke method calls) but calling views seems to be going against a wrongly set provider. So when I connect with the wallet, all my calls get an error that 'the contract isn't deployed' because it is checking against a goerli-testnet provider rather than my devnet. I can set a default provider manually, but it gets overwritten when I access the wallet.


I am hoping that there is maybe a third wallet or something that can help me sidestep the concern. But perhaps my understanding of the situation is misguided. I am using starknet-react, if that maybe is contributing to the issue.


﻿  



ㅤ
_This question was originally posted on [Triality](https://triality.org/question/926)_

How do I develop against cairo devnet with browser wallets?

I am getting the following error:


﻿  



`Cannot unpack base * currVal. from`


 `let (newVal) = base * currVal`


Can someone help me understand what this issue is about?


ㅤ
_This question was originally posted on [Triality](https://triality.org/question/492)_

Cairo: Cannot unpack multiplication error

Hey! I have a contract deployed on Testnet. Let's say its address is `0x1234`.

I want to get its ABI somehow, but I don't have the code of the contract, because it wasn't deployed by me.

I'm using StarkNet.py to interact with StarkNet.

Does anyone know the answer?

How to get the contract ABI using Starknet.Py?

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

Hey, I'm using StartkNet.py to make a transaction and it gets rejected. 
How to solve it?

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StarknetPy Error in get_balance_sync (StarknetErrorCode.ENTRY_POINT_NOT_FOUND_IN_CONTRACT)

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