Resolve "Enable linter to catch unused fields and let them fail lint"

.golangci.yaml

@@ -16,7 +16,7 @@ linters:
         - nestif
         - paralleltest
         - protogetter
-        - testifylint 
+        - testifylint
         - whitespace
         - durationcheck
         - bodyclose
@@ -28,6 +28,15 @@ linters:
         - sqlclosecheck
         #- exhaustruct # Does not work with gRPC, as it wants us to implement 'UnimplementedHealthCtrlServer', which is obviously not intended to be implemented. Would otherwise be useful.
 
+    settings:
+        unused:
+            # Mark all function parameters as used.
+            parameters-are-used: false
+            # Mark all local variables as used.
+            local-variables-are-used: false
+            # Mark all identifiers inside generated files as used.
+            generated-is-used: false
+
 formatters:
     # Enable specific formatter.
     # Default: [] (uses standard Go formatting)

ctrl/internal/infrastructure/grpc/server.go

@@ -19,7 +19,7 @@ import (
 // It is used to start the server and register services.
 // It also implements the io.Closer interface to allow for graceful shutdown.
 type GRPCServer interface {
-	Start(serviceRegister func(server *grpc.Server, app *application.Application))
+	Start(func(server *grpc.Server, app *application.Application))
 	io.Closer
 }
 
@@ -35,7 +35,7 @@ func NewGrpcServer(
 	app *application.Application,
 	logger *zap.SugaredLogger,
 ) (GRPCServer, error) {
-	options, err := buildOptions(config, logger)
+	options, err := buildOptions(logger)
 	if err != nil {
 		return nil, err
 	}
@@ -71,7 +71,6 @@ func (g gRPCServer) Close() error {
 }
 
 func buildOptions(
-	config config.Config,
 	logs *zap.SugaredLogger,
 ) ([]grpc.ServerOption, error) {
 	grpcPanicRecoveryHandler := func(p any) (err error) {

ctrl/internal/service/routing.go

@@ -32,6 +32,8 @@ func (r *Routing) RequestRoute(
 	// calculate route
 	time.Sleep(time.Second)
 
+	r.logger.Debugf("got request route %+v", req)
+
 	return model.Route{
 		ID: "1337",
 	}, nil
@@ -45,6 +47,7 @@ func (r *Routing) AnnouncePayloadRelay(
 	defer span.End()
 
 	// gossip routes to KMS
+	r.logger.Debugf("got announce payload relay %+v", req)
 
 	return nil
 }
@@ -56,6 +59,8 @@ func (r *Routing) PayloadRelayFinished(
 	_, span := r.tracer.Start(ctx, "payload-relay-finished")
 	defer span.End()
 
+	r.logger.Debugf("got payload relay finished %+v", req)
+
 	return nil
 }
 
@@ -63,6 +68,8 @@ func (r *Routing) PayloadRelayError(ctx context.Context, req ports.PayloadRelayE
 	_, span := r.tracer.Start(ctx, "payload-relay-error")
 	defer span.End()
 
+	r.logger.Debugf("got payload relay error %+v", req)
+
 	return nil
 }
 
@@ -73,5 +80,7 @@ func (r *Routing) PushKeyStoreFillLevel(
 	_, span := r.tracer.Start(ctx, "push-key-store-fill-level")
 	defer span.End()
 
+	r.logger.Debugf("got push key store fill level %+v", req)
+
 	return nil
 }