discovery: +invoke url

api/billing/fees/internal/server/internal/serverimp.go

@@ -129,6 +129,11 @@ func (i *Imp) Start() error {
 		if oracleClient != nil {
 			opts = append(opts, fees.WithOracleClient(oracleClient))
 		}
+		if cfg.GRPC != nil {
+			if invokeURI := cfg.GRPC.DiscoveryInvokeURI(); invokeURI != "" {
+				opts = append(opts, fees.WithDiscoveryInvokeURI(invokeURI))
+			}
+		}
 		svc := fees.NewService(logger, repo, producer, opts...)
 		i.service = svc
 		return svc, nil

api/billing/fees/internal/service/fees/options.go

@@ -1,6 +1,8 @@
 package fees
 
 import (
+	"strings"
+
 	internalcalculator "github.com/tech/sendico/billing/fees/internal/service/fees/internal/calculator"
 	oracleclient "github.com/tech/sendico/fx/oracle/client"
 	clockpkg "github.com/tech/sendico/pkg/clock"
@@ -46,3 +48,10 @@ func WithFeeResolver(r FeeResolver) Option {
 		}
 	}
 }
+
+// WithDiscoveryInvokeURI sets the invoke URI used when announcing the service in discovery.
+func WithDiscoveryInvokeURI(invokeURI string) Option {
+	return func(s *Service) {
+		s.invokeURI = strings.TrimSpace(invokeURI)
+	}
+}

api/billing/fees/internal/service/fees/service.go

@@ -40,6 +40,7 @@ type Service struct {
 	oracle     oracleclient.Client
 	resolver   FeeResolver
 	announcer  *discovery.Announcer
+	invokeURI  string
 	feesv1.UnimplementedFeeEngineServer
 }
 
@@ -93,6 +94,7 @@ func (s *Service) startDiscoveryAnnouncer() {
 	announce := discovery.Announcement{
 		Service:    "BILLING_FEES",
 		Operations: []string{"fee.calc"},
+		InvokeURI:  s.invokeURI,
 		Version:    appversion.Create().Short(),
 	}
 	s.announcer = discovery.NewAnnouncer(s.logger, s.producer, string(mservice.FeePlans), announce)