From b51e0e39f10fc36cfa0dad0b5b1db6ee687c0788 Mon Sep 17 00:00:00 2001
From: viktorking7 <140458814+viktorking7@users.noreply.github.com>
Date: Fri, 26 Sep 2025 18:18:45 +0200
Subject: [PATCH] Update hash.ts

---
 packages/proof/src/hash.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/proof/src/hash.ts b/packages/proof/src/hash.ts
index 6f9285ae5..a320fafb5 100644
--- a/packages/proof/src/hash.ts
+++ b/packages/proof/src/hash.ts
@@ -9,5 +9,9 @@ import { NumericString } from "snarkjs"
  * @returns The message digest.
  */
 export default function hash(message: BigNumberish): NumericString {
-    return (BigInt(keccak256(toBeHex(message, 32))) >> 8n).toString()
+    // SNARK scalar field modulus (Baby Jubjub curve)
+    const SNARK_SCALAR_FIELD = 21888242871839275222246405745257275088548364400416034343698204186575808495617n
+    
+    const hashValue = BigInt(keccak256(toBeHex(message, 32)))
+    return (hashValue % SNARK_SCALAR_FIELD).toString()
 }