Big update to properly support multi currencies.

app/Support/Models/TransactionJournalTrait.php

@@ -213,6 +213,14 @@ trait TransactionJournalTrait
         return 0;
     }
 
+    /**
+     * @return Transaction
+     */
+    public function positiveTransaction(): Transaction
+    {
+        return $this->transactions()->where('amount', '>', 0)->first();
+    }
+
     /**
      * @return Collection
      */