diff --git a/internal/merch/controller.go b/internal/merch/controller.go
index eae6d52..008979f 100644
--- a/internal/merch/controller.go
+++ b/internal/merch/controller.go
@@ -9,6 +9,8 @@ import (
 	"net/http"
 )
 
+const controllerLogHeader string = "[Controller]"
+
 type controller struct {
 	service *service
 	utils   utils.Utils
@@ -54,13 +56,13 @@ func (co *controller) create(c *gin.Context) {
 	var newMerch newMerchDTO
 	if err := c.ShouldBindJSON(&newMerch); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if err := co.service.createMerch(c, getUserId(c), &newMerch); err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
@@ -85,7 +87,7 @@ func (co *controller) getMany(c *gin.Context) {
 	response, err := co.service.getMany(c, getUserId(c))
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
@@ -115,27 +117,27 @@ func (co *controller) updateMerch(c *gin.Context) {
 	merchUuid := c.Param("id")
 	if err := uuid.Validate(merchUuid); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	var payload updateMerchDTO
 	if err := c.ShouldBindJSON(&payload); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if merchUuid != payload.MerchUuid {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: "MerchUuid does not match"})
-		logErrController(errors.New("MerchUuid does not match"))
+		logErr(controllerLogHeader, errors.New("MerchUuid does not match"))
 		return
 	}
 
 	response, err := co.service.updateMerch(c, getUserId(c), &payload)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
@@ -160,27 +162,27 @@ func (co *controller) updateExtraData(c *gin.Context) {
 	merchUuid := c.Param("id")
 	if err := uuid.Validate(merchUuid); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	var payload extraDataDTO
 	if err := c.ShouldBindJSON(&payload); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if merchUuid != payload.MerchUuid {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: "MerchUuid does not match"})
-		logErrController(errors.New("MerchUuid does not match"))
+		logErr(controllerLogHeader, errors.New("MerchUuid does not match"))
 		return
 	}
 
 	response, err := co.service.updateExtraData(c, getUserId(c), &payload)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
@@ -203,13 +205,13 @@ func (co *controller) deleteMerch(c *gin.Context) {
 	merchUuid := c.Param("id")
 	if err := uuid.Validate(merchUuid); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if err := co.service.deleteOneMerchRecord(c, getUserId(c), merchUuid); err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
@@ -233,17 +235,17 @@ func (co *controller) createOrigin(c *gin.Context) {
 
 	if err := c.ShouldBindJSON(&origin); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if err := co.service.createOrigin(c, origin); err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
-	logDebugController("create origin success")
+	logDebug(controllerLogHeader, "create origin success")
 	c.Status(http.StatusCreated)
 }
 
@@ -263,11 +265,11 @@ func (co *controller) getOrigins(c *gin.Context) {
 	response, err := co.service.getOrigins(c)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
-	logDebugController("get origins success")
+	logDebug(controllerLogHeader, "get origins success")
 	c.JSON(http.StatusOK, response)
 }
 
@@ -288,16 +290,16 @@ func (co *controller) deleteOrigin(c *gin.Context) {
 
 	if err := c.ShouldBindJSON(&origin); err != nil {
 		c.JSON(http.StatusBadRequest, responses.BadRequest{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
 	if err := co.service.deleteOrigin(c, origin); err != nil {
 		c.JSON(http.StatusInternalServerError, responses.InternalServerError{Error: err.Error()})
-		logErrController(err)
+		logErr(controllerLogHeader, err)
 		return
 	}
 
-	logDebugController("delete origin success")
+	logDebug(controllerLogHeader, "delete origin success")
 	c.Status(http.StatusNoContent)
 }
diff --git a/internal/merch/helper.go b/internal/merch/helper.go
index 016bd99..027feb1 100644
--- a/internal/merch/helper.go
+++ b/internal/merch/helper.go
@@ -6,29 +6,17 @@ import (
 )
 
 const (
-	pkgLogHeader        = "Merch"
-	controllerLogHeader = "[Controller]"
-	serviceLogHeader    = "[Service]"
+	pkgLogHeader = "Merch"
 )
 
-// logDebugService wrapper for log messages
-func logDebugService(msg string) {
-	log.Debugf("%v %v %v", pkgLogHeader, serviceLogHeader, msg)
+// logDebug wrapper for log messages
+func logDebug(header, msg string) {
+	log.Debugf("%v %v %v", pkgLogHeader, header, msg)
 }
 
-// logErrService wrapper for log messages
-func logErrService(err error) {
-	log.WithError(err).Errorf("%v %v", pkgLogHeader, serviceLogHeader)
-}
-
-// logDebugController wrapper for log messages
-func logDebugController(msg string) {
-	log.Debugf("%v %v %v", pkgLogHeader, controllerLogHeader, msg)
-}
-
-// logErrController wrapper for log messages
-func logErrController(err error) {
-	log.WithError(err).Errorf("%v %v", pkgLogHeader, controllerLogHeader)
+// logErr wrapper for log messages
+func logErr(header string, err error) {
+	log.WithError(err).Errorf("%v %v", pkgLogHeader, header)
 }
 
 func getUserId(c *gin.Context) int64 {
diff --git a/internal/merch/service.go b/internal/merch/service.go
index 1b1a1f0..a7e78e3 100644
--- a/internal/merch/service.go
+++ b/internal/merch/service.go
@@ -8,6 +8,8 @@ import (
 	"github.com/google/uuid"
 )
 
+const serviceLogHeader string = "[Service]"
+
 type service struct {
 	repo         Repository
 	utils        utils.Utils
@@ -31,14 +33,14 @@ func (s *service) createOrigin(ctx context.Context, o *newOriginDTO) error {
 		Name:      o.Name,
 	}
 
-	logDebugService("create origin success")
+	logDebug(serviceLogHeader, "create origin success")
 	return s.repo.createOrigin(ctx, newOrigin)
 }
 
 func (s *service) getOrigins(ctx context.Context) (*originsDTO, error) {
 	data, err := s.repo.getOrigins(ctx)
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return nil, err
 	}
 
@@ -54,12 +56,12 @@ func (s *service) getOrigins(ctx context.Context) (*originsDTO, error) {
 		Origins: origins,
 	}
 
-	logDebugService("get origins success")
+	logDebug(serviceLogHeader, "get origins success")
 	return response, nil
 }
 
 func (s *service) deleteOrigin(ctx context.Context, origin *deleteOriginDTO) error {
-	logDebugService("delete origin success")
+	logDebug(serviceLogHeader, "delete origin success")
 	return s.repo.deleteOriginByName(ctx, origin.Name, s.utils.NullTimeNowUTC())
 }
 
@@ -72,7 +74,7 @@ func (s *service) createMerch(ctx context.Context, userId int64, payload *newMer
 
 	merchUuid, err := uuid.NewV7()
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return err
 	}
 
@@ -90,7 +92,7 @@ func (s *service) createMerch(ctx context.Context, userId int64, payload *newMer
 
 		originsMap, _, err := s.getOriginsMaps(ctx)
 		if err != nil {
-			logErrService(err)
+			logErr(serviceLogHeader, err)
 			return err
 		}
 
@@ -112,7 +114,7 @@ func (s *service) createMerch(ctx context.Context, userId int64, payload *newMer
 func (s *service) getOriginsMaps(ctx context.Context) (map[string]int64, map[int64]string, error) {
 	origins, err := s.repo.getOrigins(ctx)
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return nil, nil, err
 	}
 
@@ -127,6 +129,10 @@ func (s *service) getOriginsMaps(ctx context.Context) (map[string]int64, map[int
 	return namesMap, idsMap, nil
 }
 
+func (s *service) getMerchUuidMap(ctx context.Context, uuids []string) (map[string]int64, error) {
+	return s.repo.getMerchUuidMap(ctx, uuids)
+}
+
 func (s *service) getMany(ctx context.Context, userId int64) ([]merchDTO, error) {
 	return s.repo.getMany(ctx, userId)
 }
@@ -138,13 +144,13 @@ func (s *service) updateMerch(ctx context.Context, userId int64, payload *update
 func (s *service) updateExtraData(ctx context.Context, userId int64, payload *extraDataDTO) (*extraDataDTO, error) {
 	merchId, err := s.repo.getMerchIdByUuid(ctx, userId, payload.MerchUuid)
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return nil, err
 	}
 
 	origins, ids, err := s.getOriginsMaps(ctx)
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return nil, err
 	}
 
@@ -166,7 +172,7 @@ func (s *service) updateExtraData(ctx context.Context, userId int64, payload *ex
 
 	result, err := s.repo.updateExtraData(ctx, merchId, insertData)
 	if err != nil {
-		logErrService(err)
+		logErr(serviceLogHeader, err)
 		return nil, err
 	}