zk-benchmarks/hash/snark/bench/Poseidon2/hash.circom.template

pragma circom 2.0.0;

include "../../../external/hash-circuits/circuits/poseidon2/poseidon2_hash.circom";
include "../../../external/hash-circuits/circuits/poseidon2/poseidon2_merkle.circom";

//------------------------------------------------------------------------------

// sponge with rate=1 (capacity=2)
template Bench_hash_sponge_rate1(n) {
  signal input  inp[n];
  signal output out;
  component sponge = PoseidonSponge(3,2,n,1);
  sponge.inp    <== inp;
  sponge.out[0] ==> out;
}

// sponge with rate=2 (capacity=1)
template Bench_hash_sponge_rate2(n) {
  signal input  inp[n];
  signal output out;
  component sponge = PoseidonSponge(3,1,n,1);
  sponge.inp    <== inp;
  sponge.out[0] ==> out;
}

//------------------------------------------------------------------------------

function FloorLog2(n) {
  return (n==0) ? -1 : (1 + FloorLog2(n>>1));
}

function CeilLog2(n) {
  return (n==0) ? 0 : (1 + FloorLog2(n-1));
}

template Bench_hash_merkle(n) {
  var log2n = CeilLog2(n);
  assert( (1<<log2n) == n );    // for now this only works for power-of-two sized inputs 

  signal input  inp[n];
  signal output out;
  component merkle = PoseidonMerkle(log2n);
  merkle.inp      <== inp;
  merkle.out_root ==> out;
}

//------------------------------------------------------------------------------

component main {public [inp]} = Bench_ZKBENCH_WHICH( ZKBENCH_INPUT_SIZE );