feat: add pow2 and pow10 utilizing const arrays

[milancermak]

Feature Request

Describe the Feature Request

Cairo 2.7.0 brought back the use of dw in const array. In Cairo0, it was used by a lot of projects to have the most efficient implementation of power of 2 and power of 10 since instead of looping it's just a lookup table.

pow2 and pow10 are the most commonly used powers - for example, the former is used in Alexandria as well for bitshifting, the latter is often used for defi applications as we deal with powers of ERC20.decimals there.

Describe Preferred Solution

Something like:

pub fn pow10(n: usize) -> u128 {
    *(P10.span()[n])
}

And similarly for pow2.

Related Code

Additional Context

If the feature request is approved, would you be willing to submit a PR?
(Help can be provided if you need assistance submitting a PR)

• Yes
• No

[PavitraAgarwal21]

can i take this up

[onlydustapp]

Hey @PavitraAgarwal21!
Thanks for showing interest.
We've created an application for you to contribute to Alexandria.
Go check it out on OnlyDust!

[oluwa-peski]

Is this issue still open? I'd like to complete it, but can't find a way to apply for it on onlydust
@milancermak

[onlydustapp]

Hey @oluwa-peski!
Thanks for showing interest.
We've created an application for you to contribute to Alexandria.
Go check it out on OnlyDust!