BabyJub Optimization

apguerrera · Dec 16, 2018 · 6ea1ea7 · 6ea1ea7
1 parent 37edfc1
commit 6ea1ea7
Showing 1 changed file with 4 additions and 6 deletions.
diff --git a/circuits/babyjub.circom b/circuits/babyjub.circom
@@ -11,23 +11,21 @@ template BabyAdd() {
     signal beta;
     signal gamma;
     signal delta;
-    signal epsilon;
     signal tau;
 
     var a = 168700;
     var d = 168696;
 
     beta <== x1*y2;
     gamma <== y1*x2;
-    delta <== y1*y2;
-    epsilon <== x1*x2;
-    tau <== delta * epsilon;
+    delta <== (-a*x1+y1)*(x2 + y2);
+    tau <== beta * gamma;
 
     xout <-- (beta + gamma) / (1+ d*tau);
     (1+ d*tau) * xout === (beta + gamma);
 
-    yout <-- (delta - a * epsilon) / (1-d*tau);
-    (1-d*tau)*yout === (delta - a * epsilon);
+    yout <-- (delta + a*beta - gamma) / (1-d*tau);
+    (1-d*tau)*yout === (delta + a*beta - gamma);
 }
 
 template BabyDbl() {