mainnet dapp:  check this ser 
—————————————
Wallet : Argent X,  Braavos
Bridge: StarkGate,   Orbiter Finance
CEX to StarkNet: layerSwap
Swap: myswap
NFT: Mint square , Aspect, pxls.wtf

and you can find them in this page made by the community:https://www.starknet-ecosystem.com/ , thank you

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

Newton

Any nft marketplace has launched on starknet L2?

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

Any NFT marketplace has launched on starknet L2?

Does anyone know how I can create an array and populate it in the python hint?
Basically something like


```cairo
let (my_array: felt*) = alloc()
%{
  ids.my_array = [1, 2, 3]
%}
```


How can I create an array and populate it in the hint Cairo lang/Protostar?

Hello, I am trying to implement the connect wallet : ``` import { useConnectors } from '-react/core' function YourComponent() { const { connect, connectors } = useConnectors() return ( <div> {connectors.map((connector) => connector.available() ? ( <button key={connector.id()} onClick={() => connect(connector)}> Connect {connector.name()} </button> ) : null )} </div> ) } ``` I feel like connectors will only give the wallet if I have it on my chrome extensions , so whats the point of connector.available() ? I am using : ``` const connectors = getInstalledInjectedConnectors() ```

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

Implementing the connect wallet. Can you help about connectors?

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?

Hello! This is day 10 of the 17 days of the Cairo Challenge. And I have no idea how to solve the [playground](https://www.cairo-lang.org/playground/) exercise “Bitwise operations”.  Perhaps you can help me?

```
// The bitwise builtin allows you to perform bitwise operations
// (and, or, xor) on integers up to 251 bits.
//
// The following code implements the function xor_last_hex_digits,
// which takes the two last hexadecimal digits and "xor"s them.
// For example, in 0x1234 the last two digits are 3 and 4,
// and their xor is 3^4=7.
//
// Fix the missing code and make sure it works.

%builtins bitwise

from starkware.cairo.common.bitwise import bitwise_and, bitwise_xor
from starkware.cairo.common.cairo_builtins import BitwiseBuiltin

// Returns the xor of the last two hexadecimal digits.
func xor_last_hex_digits{bitwise_ptr: BitwiseBuiltin*}(x: felt) -> (res: felt) {
    // Fix and uncomment the line below.
    // let (digit0) = ...

    let (shifted_digit1) = bitwise_and(x, 0xF0);
    tempvar digit1 = shifted_digit1 / 0x10;

    return bitwise_xor(digit0, digit1);
}

func main{bitwise_ptr: BitwiseBuiltin*}() {
    let (res) = xor_last_hex_digits(0x1234);
    assert res = 7;

    return ();
}
```

---

> Answers to this question are a part of the ✨ 17 days of Cairo Lang with Playground & Newton. ✨
> 

*Vote for your favorite answer - the best answer will win a $10 award. A new day – a new reward! During the next 17 days, our goal is to attract more developers to the Cairo language and to systematize the knowledge of Cairo lang. [Read rules](https://www.notion.so/17-days-of-Cairo-Lang-with-Newton-550dfcda6a2d449ca468be293c776578)*

How to make Bitwise operations in Cairo Lang using %builtins bitwise, bitwise_xor?

hi guys! is it possible to import local python files into hints?

Like so:
```python
# Cairo here

%{
	import my_python_file.py
	# Python here
%}
```

Is it possible to import local python files into hints?

What are Event Indexers in Cairo lang? What is a StarkNet indexer?
Can you explain more about how it work and is there any difference between StarkNet indexer and Solidity once?

What are Event Indexers in Cairo lang? What is a StarkNet indexer?

I'm new to Cairo and I want to know what is the difference when I write `let x = 1;` and `tempvar x = 1;`. Is there any difference in Cairo Lang between let and tempvar?

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Any NFT marketplace has launched on starknet L2?

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