Disabled GRPC server

client/config/config.go

@@ -4,6 +4,7 @@ import "github.com/multiversx/mx-chain-sovereign-bridge-go/cert"
 
 // ClientConfig holds all grpc client's config
 type ClientConfig struct {
+	Enabled        bool
 	GRPCHost       string
 	GRPCPort       string
 	CertificateCfg cert.FileCfg

client/disabled/client.go

@@ -0,0 +1,29 @@
+package disabled
+
+import (
+	"context"
+
+	"github.com/multiversx/mx-chain-core-go/data/sovereign"
+)
+
+type client struct{}
+
+// NewDisabledClient creates a new instance of disabled client
+func NewDisabledClient() *client {
+	return &client{}
+}
+
+// Send does nothing and returns empty bridge operations response
+func (c *client) Send(_ context.Context, _ *sovereign.BridgeOperations) (*sovereign.BridgeOperationsResponse, error) {
+	return &sovereign.BridgeOperationsResponse{}, nil
+}
+
+// Close returns no error
+func (c *client) Close() error {
+	return nil
+}
+
+// IsInterfaceNil checks if the underlying pointer is nil
+func (c *client) IsInterfaceNil() bool {
+	return c == nil
+}

client/factory.go

@@ -6,10 +6,12 @@ import (
 
 	"github.com/multiversx/mx-chain-core-go/data/sovereign"
 	logger "github.com/multiversx/mx-chain-logger-go"
-	"github.com/multiversx/mx-chain-sovereign-bridge-go/cert"
-	"github.com/multiversx/mx-chain-sovereign-bridge-go/client/config"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
+
+	"github.com/multiversx/mx-chain-sovereign-bridge-go/cert"
+	"github.com/multiversx/mx-chain-sovereign-bridge-go/client/config"
+	"github.com/multiversx/mx-chain-sovereign-bridge-go/client/disabled"
 )
 
 const (
@@ -20,6 +22,10 @@ var log = logger.GetOrCreate("client")
 
 // CreateClient creates a grpc client with retries
 func CreateClient(cfg *config.ClientConfig) (ClientHandler, error) {
+	if !cfg.Enabled {
+		return disabled.NewDisabledClient(), nil
+	}
+
 	dialTarget := fmt.Sprintf("%s:%s", cfg.GRPCHost, cfg.GRPCPort)
 	conn, err := connectWithRetries(dialTarget, cfg.CertificateCfg)
 	if err != nil {