diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2d7ba9d
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+#v1.0.0
+
+INTERNAL:
+
+- Добавлено версионирование модели данных. На данный момент модель под версией 1
+
+FIX:
+
+- При пустой корзине во время оплаты(/cart/pay) больше не будет возвращаться 500, а будет возвращаться 406
+
+#v1.0.0
diff --git a/api/openapi/v1/openapi.yaml b/api/openapi/v1/openapi.yaml
index a3c1d62..58c552d 100644
--- a/api/openapi/v1/openapi.yaml
+++ b/api/openapi/v1/openapi.yaml
@@ -412,6 +412,12 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/Error"
+        "406":
+          description: корзина пустая
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
 
   /wallet:
     patch:
diff --git a/internal/interface/controller/http/cart_client/controllers.go b/internal/interface/controller/http/cart_client/controllers.go
index 11e5ec7..af97427 100644
--- a/internal/interface/controller/http/cart_client/controllers.go
+++ b/internal/interface/controller/http/cart_client/controllers.go
@@ -135,6 +135,10 @@ func (receiver *CartController) Pay(ctx *fiber.Ctx) error {
 
 	receiver.logger.Info("account for pay", zap.Any("acc", account))
 
+	if len(account.Cart) == 0 {
+		return ctx.Status(fiber.StatusNotAcceptable).SendString("cart is empty")
+	}
+
 	tariffs, err := receiver.hubAdminClient.GetTariffs(ctx.Context(), accessToken, account.Cart)
 	if err != nil {
 		return receiver.middleWare.ErrorOld(ctx, err)
diff --git a/internal/models/account.go b/internal/models/account.go
index d1ffe9a..bca4e23 100644
--- a/internal/models/account.go
+++ b/internal/models/account.go
@@ -15,6 +15,7 @@ type Account struct {
 	DeletedAt *time.Time    `json:"deletedAt,omitempty" bson:"deletedAt,omitempty"`
 	From      string        `json:"from" bson:"from"`
 	Partner   string        `json:"partner" bson:"partner"`
+	Version   uint32        `json:"version" bson:"version"`
 }
 
 func (receiver *Account) Sanitize() *Account {
@@ -32,6 +33,7 @@ func (receiver *Account) Sanitize() *Account {
 	//receiver.Partner = ""
 	receiver.DeletedAt = nil
 	receiver.Deleted = false
+	receiver.Version = mongoVersion
 
 	return receiver
 }
diff --git a/internal/models/config.go b/internal/models/config.go
index 7b2d27c..a0de81a 100644
--- a/internal/models/config.go
+++ b/internal/models/config.go
@@ -43,9 +43,9 @@ type ServiceConfiguration struct {
 	PubKey                     string `env:"PUBLIC_KEY"`
 	PrivKey                    string `env:"PRIVATE_KEY"`
 	ModuleLogger               string `env:"MODULE_LOGGER"`
-	NotificationBotToken                    string `env:"NOTIFICATION_BOT_TOKEN"`
-	NotificationChannel                    int64 `env:"NOTIFICATION_CHANNEL"`
-	AdminURL                    string `env:"ADMIN_FRONT_URL"`
+	NotificationBotToken       string `env:"NOTIFICATION_BOT_TOKEN"`
+	NotificationChannel        int64  `env:"NOTIFICATION_CHANNEL"`
+	AdminURL                   string `env:"ADMIN_FRONT_URL"`
 }
 
 type KafkaConfiguration struct {
@@ -131,3 +131,5 @@ type PlainAuth struct {
 	Username string `env:"MAIL_AUTH_USERNAME,required"`
 	Password string `env:"MAIL_AUTH_PASSWORD,required"`
 }
+
+const mongoVersion uint32 = 1
diff --git a/internal/models/currency.go b/internal/models/currency.go
index 082c84b..86595ce 100644
--- a/internal/models/currency.go
+++ b/internal/models/currency.go
@@ -12,6 +12,7 @@ type CurrencyList struct {
 	CreatedAt  time.Time     `json:"createdAt" bson:"createdAt"`
 	UpdatedAt  time.Time     `json:"updatedAt" bson:"updatedAt"`
 	DeletedAt  *time.Time    `json:"deletedAt,omitempty" bson:"deletedAt,omitempty"`
+	Version    uint32        `json:"version" bson:"version"`
 }
 
 func (receiver *CurrencyList) Sanitize() *CurrencyList {
@@ -22,6 +23,7 @@ func (receiver *CurrencyList) Sanitize() *CurrencyList {
 	receiver.UpdatedAt = now
 	receiver.DeletedAt = nil
 	receiver.Deleted = false
+	receiver.Version = mongoVersion
 
 	return receiver
 }
diff --git a/internal/models/history.go b/internal/models/history.go
index 57f8628..37a502e 100644
--- a/internal/models/history.go
+++ b/internal/models/history.go
@@ -7,11 +7,12 @@ type History struct {
 	UserID     string     `json:"userId" bson:"userId"`
 	Comment    string     `json:"comment" bson:"comment"`
 	Key        string     `json:"key" bson:"key"`
-	RawDetails RawDetails   `json:"rawDetails" bson:"rawDetails"`
+	RawDetails RawDetails `json:"rawDetails" bson:"rawDetails"`
 	Deleted    bool       `json:"isDeleted" bson:"isDeleted"`
 	CreatedAt  time.Time  `json:"createdAt" bson:"createdAt"`
 	UpdatedAt  time.Time  `json:"updatedAt" bson:"updatedAt"`
 	DeletedAt  *time.Time `json:"deletedAt,omitempty" bson:"deletedAt,omitempty"`
+	Version    uint32     `json:"version" bson:"version"`
 }
 
 type TariffID struct {
@@ -33,7 +34,7 @@ type ReportHistory struct {
 type RawDetails struct {
 	Tariffs []Tariff `json:"tariffs" bson:"tariffs"`
 	Price   int64    `json:"price" bson:"price"`
-  Comment string   `json:"comment" bson:"comment"`
+	Comment string   `json:"comment" bson:"comment"`
 }
 
 func (receiver *History) Sanitize() *History {
@@ -44,6 +45,7 @@ func (receiver *History) Sanitize() *History {
 	receiver.UpdatedAt = now
 	receiver.DeletedAt = nil
 	receiver.Deleted = false
+	receiver.Version = mongoVersion
 
 	return receiver
 }
diff --git a/internal/models/templategen.go b/internal/models/templategen.go
index 4d293db..a0b793a 100644
--- a/internal/models/templategen.go
+++ b/internal/models/templategen.go
@@ -1,13 +1,13 @@
 package models
 
 type RespGeneratorService struct {
-	DocNumber string   `json:"docnumber"`
+	DocNumber string `json:"docnumber"`
 	Date      string `json:"date"`
 	OrgTaxNum string `json:"orgtaxnum"`
-	OrgName   string   `json:"orgname"`
+	OrgName   string `json:"orgname"`
 	Name      string `json:"name"`
 	Amount    string `json:"amount"`
-	Price     string  `json:"price"`
-	Sum       string  `json:"sum"`
-	Unit			string	`json:"unit"`
+	Price     string `json:"price"`
+	Sum       string `json:"sum"`
+	Unit      string `json:"unit"`
 }