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perf(contracts): internal compress #558

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perf(contracts): internal compress #558

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6c196fe
internal compress
philsippl Mar 16, 2026
3d959dd
Merge branch 'main' into ps/reduce-poseidon2-gas
paolodamico Jun 1, 2026
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2 changes: 1 addition & 1 deletion contracts/src/core/hash/Poseidon2.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ library Poseidon2T2 {
return mulmod(mulmod(t, t, PRIME), x, PRIME);
}

function compress(uint256[2] memory inputs) public pure returns (uint256) {
function compress(uint256[2] memory inputs) internal pure returns (uint256) {
require(inputs[0] < PRIME && inputs[1] < PRIME, "Poseidon2T2: inputs must be in the field.");
uint256 l = inputs[0];
uint256 r = inputs[1];
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2 changes: 1 addition & 1 deletion contracts/src/core/hash/gen_poseidon2.py
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Expand Up @@ -77,7 +77,7 @@ def generate():
l += ["library Poseidon2T2 {"]
l += [" uint256 constant PRIME = 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001;"]
l += [" function single_box(uint256 x) private pure returns (uint256) {uint256 t = mulmod(x, x, PRIME); return mulmod(mulmod(t, t, PRIME), x, PRIME);}"]
l += [" function compress(uint256[2] memory inputs) public pure returns (uint256) {"]
l += [" function compress(uint256[2] memory inputs) internal pure returns (uint256) {"]
l += [" require(inputs[0] < PRIME && inputs[1] < PRIME, \"Poseidon2T2: inputs must be in the field.\");"]
l += [" uint256 l = inputs[0]; uint256 r = inputs[1];"]

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