refactor greet func

Author: kurdy

src/dfinity_reactJs_reactRouter_babel/main.mo

@@ -1,5 +1,11 @@
-actor {
-    public func greet(name : Text) : async Text {
-        return "Hello, " # name # "!";
+import Principal "mo:base/Principal";
+import Nat32 "mo:base/Nat32";
+
+
+shared({caller = canisterOwner}) actor class () {
+
+    public shared query ({caller}) func greet(name : Text) : async Text {
+        let hash = Principal.hash(caller);
+        return "Hello, " # name # "! caller hash: " # Nat32.toText(hash);
     };
 };