First Version SMT

circuits/switcher.circom

@@ -0,0 +1,21 @@
+/*
+    Assume sel is binary.
+
+    If sel == 0 then outL = L and outR=R
+    If sel == 1 then outL = R and outR=L
+
+ */
+
+template Switcher() {
+    signal input sel;
+    signal input L;
+    signal input R;
+    signal output outL;
+    signal output outR;
+
+    signal aux;
+
+    aux <== (R-L)*sel;    // We create aux in order to have only one multiplication
+    outL <==  aux + L;
+    outR <== -aux + R;
+}