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chore: hash to field

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This commit is contained in:
darshankabariya 2025-04-08 13:13:51 +05:30
parent 8e0d6156d1
commit 04a3a8cefd
1 changed files with 12 additions and 1 deletions
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13
waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
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@ -336,6 +336,17 @@ proc indexToPath(index: uint64): seq[byte] =
for i in 0 ..< treeHeight:
result[i] = byte((index shr i) and 1)
# Hashes arbitrary signal to the underlying prime field.
proc hashToField*(signal: seq[byte]): array[32, byte] =
var ctx: keccak256
ctx.init()
ctx.update(signal)
var hash = ctx.finish()
var result: array[32, byte]
copyMem(result[0].addr, hash.data[0].addr, 32)
return result
method generateProof*(
g: OnchainGroupManager,
data: seq[byte],
@ -376,7 +387,7 @@ method generateProof*(
message_id: serialize(messageId),
path_elements: g.merkleProofCache,
identity_path_index: indexToPath(g.membershipIndex.get()),
x: toArray32(data),
x: hashToField(data),
external_nullifier: externalNullifierRes.get(),
)