update readme.md

backend/yjs/main.yjs

@@ -0,0 +1,12 @@
+
+oracle  ContractExample {
+    function onCreate(){
+       Global.owner = requester;
+    }
+  export function callHello(arg){
+    return Hello.call()+requester;
+  }
+  export function getOwner(){
+  return Global.owner;
+  }
+}