FIX: Check if invoice exists before sending, if exists then save

Send correct UF amount if date in future

app/src/Service/Venta/MediosPago/AbstractEndPoint.php

@@ -163,7 +163,7 @@ abstract class AbstractEndPoint extends LoggerEnabled implements EndPoint
         }
     }
 
+    abstract public function save(array $data): bool;
     abstract protected function mapParams(array $data): array;
     abstract protected function mapSave(array $data): array;
-    abstract protected function save(array $data): bool;
 }