first working or at least useful verion for rtdb

firebase-config.js

@@ -0,0 +1,23 @@
+const _admin = require('firebase-admin')
+let init = false
+
+module.exports = function(RED) {
+  function FirebaseConfigNode(n) {
+    RED.nodes.createNode(this,n);
+    this.cred = n.cred
+    this.dburl = n.dburl
+    this.admin = _admin
+    if(!init){
+      console.log('setting admin....')
+      init = true
+      this.credentials = JSON.parse(this.cred);
+      this.dburl = this.dburl
+      console.log('*** parsed firebase credentials: '+this.credentials.type+', project-id: '+this.credentials.project_id)
+      _admin.initializeApp({
+        credential: _admin.credential.cert(this.credentials),
+        databaseURL: this.dburl
+      });
+    }
+  }
+  RED.nodes.registerType("firebase-config", FirebaseConfigNode);
+}