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chore: hash to field

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This commit is contained in:
darshankabariya 2025-04-08 05:01:14 +05:30
parent 27b7c44202
commit da8d81dbaa
1 changed files with 16 additions and 2 deletions
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18
waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
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@ -376,9 +376,23 @@ proc indexToPath(index: uint64): seq[byte] =
for i in 0 ..< treeHeight:
result[i] = byte((index shr i) and 1)
proc hashToField*(signal: openArray[byte]): array[32, byte] =
# 1. Hash the input signal using Keccak256
var ctx: keccak256
ctx.init()
ctx.update(signal)
var hash = ctx.finish()
# 2. Convert hash to field element (equivalent to bytes_le_to_fr)
# Since we're just returning the raw hash as the field representation
# for simplicity, we can simply return the hash bytes
var result: array[32, byte]
copyMem(result[0].addr, hash.data[0].addr, 32)
return result
method generateProof*(
g: OnchainGroupManager,
data: seq[byte],
data: openArray[byte],
epoch: Epoch,
messageId: MessageId,
rlnIdentifier = DefaultRlnIdentifier,
@ -416,7 +430,7 @@ method generateProof*(
message_id: toArray32BE_to_LE(messageId),
path_elements: g.merkleProofCache,
identity_path_index: indexToPath(g.membershipIndex.get()),
x: toArray32BE_to_LE(data),
x: hashToField(data),
external_nullifier: toArray32BE_to_LE(externalNullifierRes.get()),
)