diff --git a/validate/common.go b/validate/common.go
new file mode 100644
index 0000000..e8ce5ff
--- /dev/null
+++ b/validate/common.go
@@ -0,0 +1,104 @@
+package validate
+
+import (
+	"context"
+	"fmt"
+	"gitea.pena/PenaSide/common/mongo"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"regexp"
+	"time"
+)
+
+type t struct {
+	ID string `bson:"_id,omitempty"`
+	I  int    `bson:"i"`
+}
+
+// todo в будущем в монге будут запрещены некоторые операции, надо будет обновлять
+func ValidateMongo(cfg mongo.Configuration) error {
+	if cfg.URL == "" {
+		return fmt.Errorf("mongo URL is empty")
+	}
+	if cfg.DatabaseName == "" {
+		return fmt.Errorf("mongo database name is empty")
+	}
+
+	cfg.DatabaseName = "testDBName"
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	database, err := mongo.Connect(ctx, &mongo.ConnectDeps{
+		Configuration: &cfg,
+		Timeout:       10 * time.Second,
+	})
+	if err != nil {
+		return err
+	}
+
+	defer database.Drop(ctx)
+
+	testCollection := database.Collection(cfg.DatabaseName)
+
+	receivedChannel := make(chan string, 10)
+	errorChannel := make(chan error, 1)
+
+	go func() {
+		defer close(receivedChannel)
+		defer close(errorChannel)
+		for i := 0; i <= 100; i++ {
+			d := t{
+				ID: primitive.NewObjectID().Hex(),
+				I:  i,
+			}
+
+			_, err = testCollection.InsertOne(ctx, d)
+			if err != nil {
+				errorChannel <- err
+			}
+
+			receivedChannel <- d.ID
+		}
+	}()
+	timeout := time.After(30 * time.Second)
+	for {
+		select {
+		case err = <-errorChannel:
+			if err != nil {
+				return fmt.Errorf("error document insert: %w", err)
+			}
+		case id := <-receivedChannel:
+			result := t{}
+			err := testCollection.FindOne(ctx, bson.M{"_id": id}).Decode(&result)
+			if err != nil {
+				return fmt.Errorf("mongo error finding document: %v", err)
+			}
+			if id != result.ID {
+				return fmt.Errorf("invalid id received")
+			}
+			if result.I == 100 {
+				return nil
+			}
+		case <-timeout:
+			return fmt.Errorf("timeout")
+		}
+	}
+}
+
+func ValidateTgToken(token string) error {
+	if token == "" {
+		return fmt.Errorf("tg token is empty")
+	}
+
+	// todo обдумать еще регулярку
+	pattern := `^\d+:.+$`
+	ok, err := regexp.MatchString(pattern, token)
+	if err != nil {
+		return fmt.Errorf("error validating tg token - %s: %w", token, err)
+	}
+	if !ok {
+		return fmt.Errorf("invalid tg token format: %s", token)
+	}
+
+	return nil
+}