Merge branch 'add-transaction-service-charge' into development

app/Models/Transaction.php

@@ -30,6 +30,22 @@ class Transaction extends AbstractModel implements Documentable, Transactionable
         return $this->morphTo();
     }
 
+    /**
+     * @return MorphMany
+     */
+    public function transactions(): MorphMany
+    {
+        return $this->MorphMany(Transaction::class, 'owner');
+    }
+
+    /**
+     * @return MorphOne
+     */
+    public function creditNoteTransaction()
+    {
+        return $this->MorphOne(Transaction::class, 'owner')->where('type', TransactionType::CREDIT_NOTE);
+    }
+
     /**
      * @return MorphMany
      */