first commit

circuit/babyjub.circom

@@ -0,0 +1,31 @@
+
+
+template BabyAdd() {
+    signal input x1;
+    signal input y1;
+    signal input x2;
+    signal input y2;
+    signal output xout;
+    signal output yout;
+
+    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;
+
+    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);
+}