diff --git a/backend/db/db.go b/backend/db/db.go
index f8d5657..b05ef49 100644
--- a/backend/db/db.go
+++ b/backend/db/db.go
@@ -3,12 +3,14 @@ package db
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"time"
 
+	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 )
 
-var ConnPool *pgxpool.Pool
+var connPool *pgxpool.Pool
 
 func InitDB(connString string) error {
 	poolConfig, err := pgxpool.ParseConfig(connString)
@@ -21,9 +23,27 @@ func InitDB(connString string) error {
 	poolConfig.MaxConnLifetime = time.Hour
 	poolConfig.HealthCheckPeriod = 30 * time.Second
 
-	ConnPool, err = pgxpool.NewWithConfig(context.Background(), poolConfig)
+	connPool, err = pgxpool.NewWithConfig(context.Background(), poolConfig)
 	if err != nil {
 		return fmt.Errorf("error while initializing DB connections pool: %w", err)
 	}
 	return nil
 }
+
+func transaction(ctx context.Context, handler func(pgx.Tx) (statusCode int, err error)) (statusCode int, err error) {
+	tx, err := connPool.Begin(ctx)
+	if err != nil {
+		statusCode = http.StatusInternalServerError
+		return
+	}
+	statusCode, err = handler(tx)
+	if err != nil {
+		tx.Rollback(ctx)
+		return
+	}
+	err = tx.Commit(ctx)
+	if err != nil {
+		statusCode = http.StatusInternalServerError
+	}
+	return
+}
diff --git a/backend/go.mod b/backend/go.mod
index a1d3690..f4a63a1 100644
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -9,7 +9,9 @@ require github.com/jackc/pgx/v5 v5.7.5
 require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx v3.6.2+incompatible // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/stretchr/testify v1.9.0 // indirect
 	golang.org/x/crypto v0.37.0 // indirect
 	golang.org/x/sync v0.13.0 // indirect
diff --git a/backend/go.sum b/backend/go.sum
index 30b2ddb..744b3fd 100644
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -5,10 +5,14 @@ github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsI
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx v3.6.2+incompatible h1:2zP5OD7kiyR3xzRYMhOcXVvkDZsImVXfj+yIyTQf3/o=
+github.com/jackc/pgx v3.6.2+incompatible/go.mod h1:0ZGrqGqkRlliWnWB4zKnWtjbSWbGkVEFm4TeybAXq+I=
 github.com/jackc/pgx/v5 v5.7.5 h1:JHGfMnQY+IEtGM63d+NGMjoRpysB2JBwDr5fsngwmJs=
 github.com/jackc/pgx/v5 v5.7.5/go.mod h1:aruU7o91Tc2q2cFp5h4uP3f6ztExVpyVv88Xl/8Vl8M=
 github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
 github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=