unified gateway interface

api/ledger/internal/service/ledger/service.go

@@ -16,11 +16,14 @@ import (
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
 
+	"github.com/tech/sendico/ledger/internal/appversion"
 	"github.com/tech/sendico/ledger/storage"
 	"github.com/tech/sendico/pkg/api/routers"
+	"github.com/tech/sendico/pkg/discovery"
 	"github.com/tech/sendico/pkg/merrors"
 	pmessaging "github.com/tech/sendico/pkg/messaging"
 	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
 	ledgerv1 "github.com/tech/sendico/pkg/proto/ledger/v1"
 )
 
@@ -35,10 +38,11 @@ var (
 )
 
 type Service struct {
-	logger   mlogger.Logger
-	storage  storage.Repository
-	producer pmessaging.Producer
-	fees     feesDependency
+	logger    mlogger.Logger
+	storage   storage.Repository
+	producer  pmessaging.Producer
+	fees      feesDependency
+	announcer *discovery.Announcer
 
 	outbox struct {
 		once      sync.Once
@@ -72,6 +76,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, prod pmessaging.
 	}
 
 	service.startOutboxPublisher()
+	service.startDiscoveryAnnouncer()
 	return service
 }
 
@@ -184,11 +189,27 @@ func (s *Service) Shutdown() {
 	if s == nil {
 		return
 	}
+	if s.announcer != nil {
+		s.announcer.Stop()
+	}
 	if s.outbox.cancel != nil {
 		s.outbox.cancel()
 	}
 }
 
+func (s *Service) startDiscoveryAnnouncer() {
+	if s == nil || s.producer == nil {
+		return
+	}
+	announce := discovery.Announcement{
+		Service:    "LEDGER",
+		Operations: []string{"balance.read", "ledger.debit", "ledger.credit"},
+		Version:    appversion.Create().Short(),
+	}
+	s.announcer = discovery.NewAnnouncer(s.logger, s.producer, string(mservice.Ledger), announce)
+	s.announcer.Start()
+}
+
 func (s *Service) startOutboxPublisher() {
 	if s.storage == nil || s.producer == nil {
 		return