yes, it can be!

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

Newton

Can tempvar be of a different type, say U256?

let's say

`tempvar foo: U256 = bar;` and bar being a U256?

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

Can tempvar be of a different type, say U256?

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. Does starknet have name service? what is the difference between starknet id and starknet name service? Are they same projects?

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

Does starknet have name service? 

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?

How can I verify a contract on starkscan or voyager after deploying the contract

why does keccak256 replace sha256 in warp transpiler? I want to know: are they technically identical or different?

I am asking because I haven't the support of sha256 on [Github](https://github.com/NethermindEth/warp)

![sha256 is not supported in warp, use keccak256 instead](https://res.cloudinary.com/varga/image/upload/v1671461992/Screen_Shot_2022-12-19_at_18.58.51_dawd8x.png)

why does keccak256 replace sha256 in warp?

I'm looking for a StarkNet guide. I'm an experienced CTO and I want to know more about it, check out, and learn more. Also want to get hyped. What can you recommend to read to learn more about StarkNet?

What's the best advanced StarkNet guide?

I have a question about creating elements via a function vs doing them directly. Here's a small gist: [https://gist.github.com/rlkelly/6cc8f4cce06762c3153fc7e3acaf9429](https://gist.github.com/rlkelly/6cc8f4cce06762c3153fc7e3acaf9429)

```
%lang starknet

from starkware.cairo.common.alloc import alloc

struct Foo:
    member val: felt
end

func make_foo(value: felt) -> (foo: Foo):
    let foo = Foo(
        val=value,
    )
    return (foo)
end

func make_foo_array() -> (entry: Foo*):
    let (struct_array : Foo*) = alloc()

    let foo0 = make_foo(0)
    assert struct_array[0] = foo0
    return (struct_array)
end

@external
func test_make_foo{syscall_ptr : felt*, range_check_ptr}():
    let (foo_array) = make_foo_array()
    return ()
end

#   File "starkware/cairo/lang/compiler/preprocessor/preprocessor.py", line 1223, in visit_CodeElementCompoundAssertEq
#  starkware.cairo.lang.compiler.preprocessor.preprocessor_error.PreprocessorError: contracts/tests/test_foo.cairo:22:5: Cannot compare '__main__.Foo' and '(foo : __main__.Foo)'.
```

i'm curious why `__main__.Foo` and `(foo : __main__.Foo)` are typed differently

it appears like `let foo =` and `let (foo) =`  allocate memory differently

Creating Elements via a function

why there is no fee for deploying an account contract (creating account)?

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

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Can tempvar be of a different type, say U256?

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