Kernrechtsfrage
Whether the constitutional complaint could challenge the cantonal court's application of federal contract law
Extrahierter Entscheid
No; such complaints are excluded by the subsidiarity of the constitutional complaint and had to be raised by appeal.
Extrahierte Begründung
The allegations under Arts. 412 and 413 CO concerned federal law application, which is not reviewable via constitutional complaint even if framed as arbitrariness.