Hey! Thanks for your question. If you want to send tokens on Newton StarkNet Q&A you can do the following:

1. Log in to your account using Metamask or a similar wallet by pressing the top right button.
2. Select goerli test network (just in case, [use these settings](https://www.coincarp.com/chainlist/g%C3%B6rli/))
3. Open the question you like, press "Add bounty"
4. Select the amount (we recommend at least $10)
5. During testing (1-10 Nov 2022) ensure that you selected the GOERLI network. If you did all right you should have "GOERLI" message on the navigation bar near your username
6. Approve the transaction



when i am planing to send a token ,it always goes wrong

how to send token 

Hey good question! Actually here's a guide to rollups you can refer to, and you can find more in <#977518918111465484>, thank you!
https://www.preethikasireddy.com/post/a-normies-guide-to-rollups

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

Hi everyone, I have a technical question:

We know that L2s are taking transaction load off of the Ethereum, but how is that process taking place? Is there a threshold of optimum transaction speed/cost? Are L2s only intervening when the L1 is congested or that threshold is passed?

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

 Is there a threshold of optimum transaction speed/cost in L2s?

It takes about 10 hours. After l1 is accepted, you can reconfirm it at starkgate

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

hi, i used the starkgate bridge from stark to eth one hour ago. Withdrawal has not occurred yet. How many hours does the process take? My tx hash is: <address>cfa0c02d013658804505506

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

How long does starkgate bridge process?

Thanks --- I'm not sure I've seen a lib that implements it. https://docs.soliditylang.org/en/latest/abi-spec.html#non-standard-packed-mode should help if you want to give it a shot

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

Hey guys, quick question. What should I use to execute abi.encodePacked from solidity in starknet?

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

What should I use to execute abi.encodePacked from solidity in starknet?

hello ser ,many protocols (including starknet id or likely name service protocol)are deploying on the starknet ,so please consult in their community you can refer this web   https://www.starknet-ecosystem.com/

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

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? 

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

Do any of you know where I can find the list of the decorators available in Cairo, please?

List of Cairo Decorators

Bumped into rc_bound today and was wondering: where/how is it defined and why is it much smaller than the field prime?

Cairo: Where/how is it defined and why is it much smaller than the field prime?

### How to calculate the minimum decimal number that can store 20 chars long string as a field element?

How to calculate the minimum decimal number that can store 20 chars long string as a field element?

### How to fix this?

```python
./main.cairo:23:13: While expanding the reference 'bud_ptr' in:
    bud=bud,
            ^*****^
./main:20:9: Error at pc=0:2482:
Unknown value for memory cell at address 1:8.
```

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