Poseidon hash builtin

[MaksymMalicki]

No description provided.

[MaksymMalicki]

@cicr99 I used this implementation of hades permutation and poseidon hash (https://github.com/NethermindEth/juno/blob/main/core/crypto/poseidon_hash.go), which returns only the first element of the three elements state. I had to make some modifications inside and can't use it as a package rn. Is it ok to leave this copy-pasted code, or should I come up with sth else

[TAdev0]

@MaksymMalicki can i start reviewing it as the final version?

[MaksymMalicki]

@TAdev0 yeah sure, just don't review the poseidon hash math itself, as I'm going to remove it entirely, once the new release of Juno with updated crypto package is out

[TAdev0]

ok got it will review today

[TAdev0]

seems alll good for me! I approve and lets wait for Juno to release the new function so that you can import PoseidonPerm directly