Add handling to a new exception, and add some file names to the ignor…

…e liast.

.gitignore

@@ -59,3 +59,5 @@ build
 #MacOSX hidden cache files
 __MACOSX
 package-lock.json
+package.json
+react/package.json

routes/api/electrum/createtx.js

@@ -745,6 +745,15 @@ module.exports = (api) => {
             result: 'Missing fee',
           };
 
+          res.end(JSON.stringify(retObj));
+        } else if (
+          json &&
+          JSON.stringify(json).indexOf('the transaction was rejected by network rules') > -1
+        ) {
+          const retObj = {
+            msg: 'error',
+            result: json,
+          };
           res.end(JSON.stringify(retObj));
         } else if (
           json &&