I'm not sure about that. But business logic is what you have to do de Novo to make your product. I work for an invoice processing company. Connecting to a/ma

I'm not sure about that. But business logic is what you have to do de Novo to make your product. I work for an invoice processing company. Connecting to a/many Saas is glue code (this is most of our codebase). The code that decides the rules for how an invoice is "approved" by reviewers is business logic.