ApeWorX: How do I call an account while trying to test a function?

How can I write contact memory with Account.execute in starknetjs?

Hey folks, do you know how I could read a felt* from ap?

I want to do something like this:

```rs
    let (hello : felt*) = alloc();
    tempvar world : felt* = hello;
    let world_like : felt* = [ap-1];
```

when I do tempvar world = hello, I ensure I add hello (the pointer) to [ap] and then I increase ap so world_like = [ap-1] should be the same thing than world

But I get this error:

```
Cannot assign an expression of type 'felt' to a reference of type 'felt*'.
    let world_like : felt* = [ap-1];
```

When doing a similar code:

```rust
        let (func_pc: felt*) = get_label_location(storage_var);
        _prepare_call(pedersen_ptr, range_check_ptr, len_inputs, inputs + len_inputs);
        call abs ap[11 - 6 * 2];
```

I get ```
Cannot apply subscript-operator to non-pointer, non-tuple type 'felt'.
        call abs ap[11 - 6 * 2];  // removing alloc_locals by calling ap[11-6*2] ?
```

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

how I could read a felt* from ap in Cairo lang?


I'm trying to solve [this bonus question](https://www.cairo-lang.org/docs/how_cairo_works/program_counter.html#program-counter-and-jumps) from the "How Cairo Works" tutorial. I ran the following function, opened the Cairo tracer and saw that the memory is full with powers of 2. Why is that?



```
func main():
    [fp + 1] = 2; ap++
    [fp] = 5201798304953761792; ap++
    jmp rel -1
end

```

[![enter image description here](https://i.stack.imgur.com/julcJ.jpg)](https://i.stack.imgur.com/julcJ.jpg)



ㅤ
_This question was originally posted on [Stack Overflow](https://stackoverflow.com/questions/71500794/why-does-this-cairo-program-put-powers-of-2-in-the-memory)_

Why does this Cairo program put powers of 2 in the memory?

How do I connect my DAPP to Starknet-devnet using starknetjs?

I'm implementing the new version and had a couple Q's:

- Is `useStarknetExecute` now the only transaction method (for multi and single calls).
- Do we update the transaction manager on our end? I seem to remember `useStarknetInvoke` also update this automatically

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

Questions about useStarknetExecute. Do we update the transaction manager on our end? [StarkNet/Cairo]


No, not yet. We have an expansive test suite to check the behaviour of the transpiled contracts. Warp is tested with the semantic test as solc and there are additional handwritten behaviour tests.

Have there been any security issues reported on the Cairo code generated from warp so far?

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Have there been any security issues reported on the Cairo code generated from warp so far?

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