26 lines
1 KiB
Text
26 lines
1 KiB
Text
import "hashes/pedersen/512bit" as hash
|
|
import "ecc/edwardsCompress" as edwardsCompress
|
|
import "ecc/babyjubjubParams" as context
|
|
from "ecc/babyjubjubParams" import BabyJubJubParams
|
|
import "hashes/utils/256bitsDirectionHelper" as multiplex
|
|
|
|
// Merke-Tree inclusion proof for tree depth 3 using SNARK efficient pedersen hashes
|
|
// directionSelector=> 1/true if current digest is on the rhs of the hash
|
|
def main(bool[256] rootDigest, private bool[256] leafDigest, private bool[3] directionSelector, bool[256] PathDigest0, private bool[256] PathDigest1, private bool[256] PathDigest2) -> (bool):
|
|
BabyJubJubParams context = context()
|
|
|
|
//Setup
|
|
bool[256] currentDigest = leafDigest
|
|
|
|
//Loop up the tree
|
|
bool[512] preimage = multiplex(directionSelector[0], currentDigest, PathDigest0)
|
|
currentDigest = hash(preimage)
|
|
|
|
preimage = multiplex(directionSelector[1], currentDigest, PathDigest1)
|
|
currentDigest = hash(preimage)
|
|
|
|
preimage = multiplex(directionSelector[2], currentDigest, PathDigest2)
|
|
currentDigest = hash(preimage)
|
|
|
|
return rootDigest == currentDigest
|
|
|