implementations of poseidon2 hash function (https://eprint.iacr.org/2023/323.pdf) in solidity, yul and huff.
the Poseidon2 contract needs to be deployed on the network and then you can make calls to it. here is an example to hash two field elements:
contract MyContract {
function myFunction() external returns (uint256) {
uint256 result = 0xPoseidon2ContractAddress.call(
abi.encode(
0x1762d324c2db6a912e607fd09664aaa02dfe45b90711c0dae9627d62a4207788,
0x1047bd52da536f6bdd26dfe642d25d9092c458e64a78211298648e81414cbf35
)
);
return result;
}
}gas cost for hashing one, two or three elements: 16949
gas cost for hasing one, two or three elements: 27517
| num elements | est gas |
|---|---|
| hash_1 | 219544 |
| hash_2 | 220018 |
| hash_3 | 220641 |
| hash 4 | 416486 |
| hash 5 | 417197 |
| hash 6 | 417952 |
| hash 7 | 604599 |
| hash 8 | 605311 |
| hash 9 | 606064 |
| hash 10 | 792604 |