added extended key validator

install/generator-cyphernode/generators/app/features/000_cyphernode.js

@@ -14,16 +14,11 @@ module.exports = {
       choices: utils._featureChoices()
     },
     {
-      type: 'confirm',
-      name: 'cyphernode_rocks0',
-      default: utils._getDefault( 'cyphernode_rocks0' ),
-      message: 'Does cyphernode rock?'+'\n',
-    },
-    {
-      type: 'confirm',
-      name: 'cyphernode_rocks1',
-      default: utils._getDefault( 'cyphernode_rocks1' ),
-      message: 'Does cyphernode rock?'+'\n',
+      type: 'input',
+      name: 'cyphernode_xpub',
+      default: utils._getDefault( 'cyphernode_xpub' ),
+      message: 'What is your xpub to watch?'+'\n',
+      validate: utils._xkeyValidator
     }];
   },
   env: function( props ) {

install/generator-cyphernode/generators/app/index.js

@@ -6,6 +6,7 @@ const wrap = require('wordwrap')(86);
 const validator = require('validator');
 const path = require("path");
 const featureChoices = require(path.join(__dirname, "features.json"));
+const coinstring = require('coinstring');
 
 let featurePromptModules = [];
 const normalizedPath = path.join(__dirname, "features");
@@ -76,6 +77,16 @@ module.exports = class extends Generator {
     return validator.isIP((ip+"").trim());
   }
 
+  _xpubValidator( xpub ) {
+    try {
+      coinstring.decode(xpub);
+    } catch( e ) {
+      throw new Error('Invalid extended public key. Please check your input.');
+    }
+    return true;
+  }
+
+
   _trimFilter( input ) {
     return (input+"").trim();
   }

install/generator-cyphernode/package.json

@@ -21,6 +21,7 @@
   },
   "dependencies": {
     "chalk": "^2.1.0",
+    "coinstring": "^2.3.0",
     "validator": "^10.8.0",
     "wordwrap": "^1.0.0",
     "yeoman-generator": "^2.0.1"