Update packages/baby-jubjub/src/baby-jubjub.ts

Co-authored-by: Chance <[email protected]>
privacy-scaling-explorations · Sep 13, 2024 · f0ad8e1 · f0ad8e1
1 parent b7dec5b
commit f0ad8e1
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/packages/baby-jubjub/src/baby-jubjub.ts b/packages/baby-jubjub/src/baby-jubjub.ts
@@ -79,6 +79,10 @@ export function addPoint(p1: Point<bigint>, p2: Point<bigint>): Point<bigint> {
  */
 export function mulPointEscalar(base: Point<bigint>, e: bigint): Point<bigint> {
     e %= order
+    // set a bit above the maximum value so that the exponent
+    // variable will always be 254 bits for subsequent operations
+    // the 254th bit should be ignored in any operations below
+    e += 1n << 254n
 
     let R0: Point<bigint> = id
     let R1: Point<bigint> = base