chore(workflows+app): uses null implementation

core/services/chainlink/application.go

@@ -23,7 +23,6 @@ import (
 	"github.com/smartcontractkit/chainlink-common/pkg/loop"
 	commonservices "github.com/smartcontractkit/chainlink-common/pkg/services"
 	"github.com/smartcontractkit/chainlink-common/pkg/sqlutil"
-	commontypes "github.com/smartcontractkit/chainlink-common/pkg/types"
 	"github.com/smartcontractkit/chainlink-common/pkg/utils"
 	"github.com/smartcontractkit/chainlink-common/pkg/utils/jsonserializable"
 	"github.com/smartcontractkit/chainlink-common/pkg/utils/mailbox"
@@ -216,7 +215,7 @@ func NewApplication(opts ApplicationOpts) (Application, error) {
 
 	// TODO: wire this up to config so we only instantiate it
 	// if a workflow registry address is provided.
-	workflowRegistrySyncer := syncer.NewWorkflowRegistry[commontypes.ContractReader](nil, nil, nil, nil, "")
+	workflowRegistrySyncer := syncer.NewNullWorkflowRegistrySyncer()
 	srvcs = append(srvcs, workflowRegistrySyncer)
 
 	var externalPeerWrapper p2ptypes.PeerWrapper

core/services/workflows/syncer/workflow_registry.go

@@ -554,3 +554,26 @@ func toWorkflowRegistryEventResponse(
 
 	return resp
 }
+
+type nullWorkflowRegistrySyncer struct {
+	services.Service
+}
+
+func NewNullWorkflowRegistrySyncer() *nullWorkflowRegistrySyncer {
+	return &nullWorkflowRegistrySyncer{}
+}
+
+// Start
+func (u *nullWorkflowRegistrySyncer) Start(context.Context) error {
+	return nil
+}
+
+// Close
+func (u *nullWorkflowRegistrySyncer) Close() error {
+	return nil
+}
+
+// SecretsFor
+func (u *nullWorkflowRegistrySyncer) SecretsFor(context.Context, string, string) (map[string]string, error) {
+	return nil, nil
+}