gRPC chaining.go

// GenerateTLSApi will load TLS certificates and key and create a grpc server with those.
func GenerateTLSApi(pemPath, keyPath string) (*grpc.Server, error) {
	cred, err := credentials.NewServerTLSFromFile(pemPath, keyPath)
	if err != nil {
		return nil, err
	}

	// Add PingCounter from the interceptors package
	pc := interceptors.PingCounter{}
	s := grpc.NewServer(
		grpc.Creds(cred),
		// Here we add the chaining of interceptors, they will execute in order
		grpc.ChainUnaryInterceptor(
			pc.ServerCount,
			interceptors.LogRequest,
		),
	)
	return s, nil
}