Expanded the 'save transaction' routine and cleaned it up. Still some work to do though.

app/lib/Firefly/Helper/Controllers/TransactionInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Firefly\Helper\Controllers;
+use Illuminate\Support\MessageBag;
+
+/**
+ * Interface TransactionInterface
+ *
+ * @package Firefly\Helper\Controllers
+ */
+interface TransactionInterface {
+
+    /**
+     * Store a full transaction journal and associated stuff
+     *
+     * @param array $data
+     *
+     * @return MessageBag
+     */
+    public function store(array $data);
+
+}