How to combine Hexagonal Architecture with this layout?

[vahdet]

I am trying to make use of this layout with hexagonal architecture. Is there a subset of this layout for that purpose or anybody here knows of one from somewhere else?

For now, I am using the folders like this:

• Domain Logic & Entities: internal/domain
• Service Layer interface & implementations: internal/app/service
• Datasource interfaces (either database or outer services): internal/app/repo
• Datasource *implemenrtations:
  • Database: internal/transport/egress/db
  • Outer Services (no matter REST and gRPC): internal/transport/egress/http
• Server methods:
  • Served REST API methods: pkg/api/http
  • Served gRPC methods: pkg/api/grpc