diff --git a/cmd/purchaseapp/command/migrate.go b/cmd/purchaseapp/command/migrate.go
new file mode 100644
index 00000000..d47dcf0d
--- /dev/null
+++ b/cmd/purchaseapp/command/migrate.go
@@ -0,0 +1 @@
+package command
diff --git a/cmd/purchaseapp/command/root.go b/cmd/purchaseapp/command/root.go
new file mode 100644
index 00000000..d47dcf0d
--- /dev/null
+++ b/cmd/purchaseapp/command/root.go
@@ -0,0 +1 @@
+package command
diff --git a/cmd/purchaseapp/command/serve.go b/cmd/purchaseapp/command/serve.go
new file mode 100644
index 00000000..d47dcf0d
--- /dev/null
+++ b/cmd/purchaseapp/command/serve.go
@@ -0,0 +1 @@
+package command
diff --git a/cmd/purchaseapp/main.go b/cmd/purchaseapp/main.go
new file mode 100644
index 00000000..fdd06b0b
--- /dev/null
+++ b/cmd/purchaseapp/main.go
@@ -0,0 +1,63 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/delivery/http"
+	purchaseMysql "git.gocasts.ir/ebhomengo/niki/purchaseapp/repository/mysql"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/service/order"
+	"git.gocasts.ir/ebhomengo/niki/repository/migrator"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+)
+
+func MariaDB() *mysql.DB {
+	cfg := mysql.Config{
+		Username: "niki",
+		Password: "nikiappt0lk2o20",
+		Port:     3306,
+		Host:     "localhost",
+		DBName:   "niki_db",
+	}
+	migrate := flag.Bool("migrate", false, "perform database migration")
+	flag.Parse()
+	if *migrate {
+		migrator.New(migrator.Config{
+			MysqlConfig:     cfg,
+			MigrationPath:   "./purchaseapp/repository/mysql/migration",
+			MigrationDBName: "gorp_migrations",
+		}).Up()
+	}
+
+	return mysql.New(cfg)
+}
+
+func main() {
+	cfg := mysql.Config{
+		Username: "niki",
+		Password: "nikiappt0lk2o20",
+		Port:     3306,
+		Host:     "localhost",
+		DBName:   "niki_db",
+	}
+	db := mysql.New(cfg)
+	defer func() {
+		if err := db.CloseStatements(); err != nil {
+			fmt.Printf("Error closing statements: %v\n", err)
+		}
+	}()
+
+	orderRepo := purchaseMysql.New(db)
+
+	orderSvc := Service(orderRepo)
+	server := HTTPServer(orderSvc)
+	server.Serve()
+
+}
+
+func HTTPServer(orderSvc order.Service) *http.Server {
+	return http.New(orderSvc)
+}
+
+func Service(orderRepo *purchaseMysql.DB) order.Service {
+	return order.New(orderRepo)
+}
diff --git a/config/loader.go b/config/loader.go
index 3867c153..58de5ef9 100644
--- a/config/loader.go
+++ b/config/loader.go
@@ -12,12 +12,13 @@ import (
 )
 
 const (
-	defaultPrefix       = "EB_"
-	defaultDelimiter    = "."
-	defaultSeparator    = "__"
-	defaultYamlFilePath = "config.yml"
+	defaultPrefix    = "EB_"
+	defaultDelimiter = "."
+	defaultSeparator = "__"
 )
 
+var defaultYamlFilePath = "config.yml"
+
 var c Config
 
 type Option struct {
diff --git a/purchaseapp/app.go b/purchaseapp/app.go
index 8f3c7051..8a8eda21 100644
--- a/purchaseapp/app.go
+++ b/purchaseapp/app.go
@@ -1 +1,59 @@
 package purchaseapp
+
+import (
+	"fmt"
+	purchaseHTTP "git.gocasts.ir/ebhomengo/niki/purchaseapp/delivery/http"
+	purchaseHandler "git.gocasts.ir/ebhomengo/niki/purchaseapp/delivery/http/order"
+	purchaseMysql "git.gocasts.ir/ebhomengo/niki/purchaseapp/repository/mysql"
+	purchaseService "git.gocasts.ir/ebhomengo/niki/purchaseapp/service/order"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+)
+
+type Application struct {
+	Config          Config
+	HTTPServer      *purchaseHTTP.Server
+	purchaseService purchaseService.Service
+	PurchaseHandler *purchaseHandler.Handler
+	PurchaseRepo    purchaseService.Repo
+	DB              *mysql.DB
+}
+
+func SetUp() *Application {
+
+	cfg := mysql.Config{
+		Username: "niki",
+		Password: "nikiappt0lk2o20",
+		Port:     3306,
+		Host:     "localhost",
+		DBName:   "niki_db",
+	}
+	db := mysql.New(cfg)
+	defer func() {
+		if err := db.CloseStatements(); err != nil {
+			fmt.Printf("Error closing statements: %v\n", err)
+		}
+	}()
+
+	orderRepo := purchaseMysql.New(db)
+
+	orderSvc := Service(orderRepo)
+	server := HTTPServer(orderSvc)
+
+	return &Application{
+		Config:          Config{},
+		HTTPServer:      server,
+		purchaseService: orderSvc,
+		PurchaseHandler: purchaseHandler.New(orderSvc),
+		PurchaseRepo:    orderRepo,
+		DB:              db,
+	}
+
+}
+
+func HTTPServer(orderSvc purchaseService.Service) *purchaseHTTP.Server {
+	return purchaseHTTP.New(orderSvc)
+}
+
+func Service(orderRepo *purchaseMysql.DB) purchaseService.Service {
+	return purchaseService.New(orderRepo)
+}
diff --git a/purchaseapp/config.go b/purchaseapp/config.go
index 3957f32e..988edda2 100644
--- a/purchaseapp/config.go
+++ b/purchaseapp/config.go
@@ -1,4 +1,9 @@
 package purchaseapp
 
+import (
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+)
+
 type Config struct {
+	Mysql mysql.Config `koanf:"mariadb"`
 }
diff --git a/purchaseapp/delivery/http/invoice/handler.go b/purchaseapp/delivery/http/invoice/handler.go
deleted file mode 100644
index d5de3ca8..00000000
--- a/purchaseapp/delivery/http/invoice/handler.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package invoice
-
-type Handler struct {
-}
-
-func New() *Handler {
-	return &Handler{}
-}
diff --git a/purchaseapp/delivery/http/invoice/route.go b/purchaseapp/delivery/http/invoice/route.go
deleted file mode 100644
index 7584f63a..00000000
--- a/purchaseapp/delivery/http/invoice/route.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package invoice
-
-import "github.com/labstack/echo/v4"
-
-func (h Handler) SetRoutes(e *echo.Echo) {
-
-}
diff --git a/purchaseapp/delivery/http/order/handler.go b/purchaseapp/delivery/http/order/handler.go
index a515fef5..b88f7133 100644
--- a/purchaseapp/delivery/http/order/handler.go
+++ b/purchaseapp/delivery/http/order/handler.go
@@ -1,7 +1,69 @@
 package order
 
-type Handler struct{}
+import (
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/entity"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/service/order"
+	"git.gocasts.ir/ebhomengo/niki/types"
+	"github.com/labstack/echo/v4"
+	"net/http"
+	"time"
+)
 
-func New() *Handler {
-	return &Handler{}
+type Handler struct {
+	orderSvc *order.Service
+}
+
+func New(orderSvc order.Service) *Handler {
+	return &Handler{orderSvc: &orderSvc}
+}
+
+func (h *Handler) CreateOrderHandler(c echo.Context) error {
+	var req order.CreateOrderRequest
+	if err := c.Bind(&req); err != nil {
+		msg, code := getErrorDataFromRichError(err)
+		return echo.NewHTTPError(code, msg)
+	}
+
+	orderItems := req.OrderItems
+	order := entity.Order{
+		ID:            0,
+		UserID:        types.ID(req.UserID),
+		TotalAmount:   types.Price(req.TotalAmount),
+		TotalDiscount: types.Price(req.TotalDiscount),
+		ShippingID:    types.ID(req.ShippingID),
+		PaymentMethod: req.PaymentMethod,
+		ProcessStatus: entity.WaitingToPay,
+		PaymentStatus: entity.UnPaid,
+		Address:       req.Address,
+		CreatedAt:     time.Now(),
+		UpdatedAt:     time.Now(),
+	}
+	resp, lErr := h.orderSvc.CreateOrder(order, orderItems)
+
+	if lErr != nil {
+		msg, code := getErrorDataFromRichError(lErr)
+		return echo.NewHTTPError(code, msg)
+	}
+	return c.JSON(http.StatusOK, resp)
+}
+
+func getErrorDataFromRichError(err error) (message string, code int) {
+	switch err.(type) {
+	case richerror.RichError:
+		re := err.(richerror.RichError)
+
+		return re.Message(), mapKindToCode(re.Kind())
+	default:
+		return err.Error(), http.StatusBadRequest
+	}
+}
+
+func mapKindToCode(kind richerror.Kind) int {
+	switch kind {
+	case richerror.KindInvalid:
+		return http.StatusUnprocessableEntity
+	default:
+		return http.StatusBadRequest
+	}
 }
diff --git a/purchaseapp/delivery/http/order/route.go b/purchaseapp/delivery/http/order/route.go
index 62b20d3c..3db0dd1f 100644
--- a/purchaseapp/delivery/http/order/route.go
+++ b/purchaseapp/delivery/http/order/route.go
@@ -4,4 +4,5 @@ import "github.com/labstack/echo/v4"
 
 func (h Handler) SetRoutes(e *echo.Echo) {
 
+	e.POST("/order/create", h.CreateOrderHandler)
 }
diff --git a/purchaseapp/delivery/http/server.go b/purchaseapp/delivery/http/server.go
index fd23a2f6..1da710cb 100644
--- a/purchaseapp/delivery/http/server.go
+++ b/purchaseapp/delivery/http/server.go
@@ -1,33 +1,32 @@
 package http
 
 import (
-	httpserver "git.gocasts.ir/ebhomengo/niki/delivery/http_server"
-	"git.gocasts.ir/ebhomengo/niki/purchaseapp/delivery/http/invoice"
 	"git.gocasts.ir/ebhomengo/niki/purchaseapp/delivery/http/order"
+	orderService "git.gocasts.ir/ebhomengo/niki/purchaseapp/service/order"
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
 )
 
 type Server struct {
-	HTTPServer     *httpserver.Server
-	OrderHandler   *order.Handler
-	InvoiceHandler *invoice.Handler
+	OrderHandler *order.Handler
 }
 
-func New(httpserver *httpserver.Server) *Server {
+func New(orderSvc orderService.Service) *Server {
 	return &Server{
-		HTTPServer:     httpserver,
-		OrderHandler:   order.New(),
-		InvoiceHandler: invoice.New(),
+		OrderHandler: order.New(orderSvc),
 	}
 }
 
 func (s *Server) Serve() {
-	s.RegisterRoutes()
+	e := echo.New()
+	e.Use(middleware.RequestLogger())
+	e.GET("/purchase/health-check", s.healthCheck)
+
+	s.OrderHandler.SetRoutes(e)
+
+	if err := e.Start(":8088"); err != nil {
+		e.Logger.Error("failed to start server", "error", err)
+	}
 }
 
 func (s *Server) Stop() {}
-
-func (s *Server) RegisterRoutes() {
-	s.HTTPServer.Router.GET("/purchase/health-check", s.healthCheck)
-	s.OrderHandler.SetRoutes(s.HTTPServer.Router)
-	s.InvoiceHandler.SetRoutes(s.HTTPServer.Router)
-}
diff --git a/purchaseapp/entity/invoice.go b/purchaseapp/entity/invoice.go
deleted file mode 100644
index ee532a52..00000000
--- a/purchaseapp/entity/invoice.go
+++ /dev/null
@@ -1,4 +0,0 @@
-package entity
-
-type Invoice struct {
-}
diff --git a/purchaseapp/entity/order.go b/purchaseapp/entity/order.go
index 332403f8..0e235f66 100644
--- a/purchaseapp/entity/order.go
+++ b/purchaseapp/entity/order.go
@@ -1,4 +1,59 @@
 package entity
 
+import (
+	"git.gocasts.ir/ebhomengo/niki/types"
+	"time"
+)
+
 type Order struct {
+	ID            types.ID
+	UserID        types.ID
+	TotalAmount   types.Price
+	TotalDiscount types.Price
+	ShippingID    types.ID
+	PaymentMethod PaymentMethod
+	ProcessStatus ProcessStatus
+	PaymentStatus PaymentStatus
+	Address       string
+	CreatedAt     time.Time
+	UpdatedAt     time.Time
 }
+
+type OrderItem struct {
+	ID                types.ID
+	ProductID         types.ID
+	Price             types.Price
+	Quantity          types.Count
+	PriceWithDiscount types.Price
+	OrderID           types.ID
+	CreatedAt         time.Time
+}
+
+type PaymentMethod string
+
+const (
+	Online PaymentMethod = "online"
+	Wallet               = "wallet"
+	Cart                 = "cart"
+)
+
+type ProcessStatus string
+
+const (
+	WaitingToPay ProcessStatus = "waiting-to-pay"
+	processing                 = "processing"
+	accepted                   = "accepted"
+	preparing                  = "preparing"
+	prepared                   = "prepared"
+	givenToPost                = "given-to-post"
+	delivered                  = "delivered"
+	cancelled                  = "cancelled"
+)
+
+type PaymentStatus string
+
+const (
+	Paid      PaymentStatus = "paid"
+	UnPaid                  = "unpaid"
+	Cancelled               = "cancelled"
+)
diff --git a/purchaseapp/repository/migrations/2026010411120_create_orders_table.sql b/purchaseapp/repository/migrations/2026010411120_create_orders_table.sql
new file mode 100644
index 00000000..2fe04c92
--- /dev/null
+++ b/purchaseapp/repository/migrations/2026010411120_create_orders_table.sql
@@ -0,0 +1,23 @@
+-- +migrate Up
+-- please read this article to understand why we use VARCHAR(191)
+-- https://www.grouparoo.com/blog/varchar-191#why-varchar-and-not-text
+CREATE TABLE `orders` (
+                          `id`             INT PRIMARY KEY AUTO_INCREMENT,
+                          `user_id`        INT NOT NULL,
+                          `address`        TEXT,
+                          `shipping_id`    INT NOT NULL,
+                          `payment_method` ENUM('online', 'wallet', 'cart') DEFAULT 'online',
+                          `payment_status` ENUM('unpaid', 'paid', 'cancelled') DEFAULT 'unpaid',
+                          `process_status` ENUM('waiting-to-pay', 'processing', 'accepted', 'preparing', 'prepared', 'given-to-post', 'delivered', 'cancelled') DEFAULT 'waiting-to-pay',
+                          `total_amount`   INT NOT NULL,
+                          `total_discount` INT NULL,
+
+                          `created_at`    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                          `updated_at`    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+--                         FOREIGN KEY (`user_id`) REFERENCES `users`(`id`)
+--                         FOREIGN KEY (`shipping_id`) REFERENCES `shippings`(`id`)
+
+);
+
+-- +migrate Down
+DROP TABLE `orders`;
diff --git a/purchaseapp/repository/migrations/20260104_11121_create_order_items_table.sql b/purchaseapp/repository/migrations/20260104_11121_create_order_items_table.sql
new file mode 100644
index 00000000..bd209205
--- /dev/null
+++ b/purchaseapp/repository/migrations/20260104_11121_create_order_items_table.sql
@@ -0,0 +1,19 @@
+-- +migrate Up
+-- please read this article to understand why we use VARCHAR(191)
+-- https://www.grouparoo.com/blog/varchar-191#why-varchar-and-not-text
+CREATE TABLE `order_items` (
+                               `id`                  INT PRIMARY KEY AUTO_INCREMENT,
+                               `order_id`            INT NOT NULL,
+                               `product_id`          INT NOT NULL,
+                               `quantity`            INT DEFAULT 1,
+                               `price`               INT NOT NULL,
+                               `price_with_discount` INT NULL,
+                               `created_at`          TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                               `updated_at`          TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+
+                                FOREIGN KEY (`order_id`) REFERENCES `orders`(`id`)
+
+);
+
+-- +migrate Down
+DROP TABLE `order_items`;
diff --git a/purchaseapp/repository/mysql/order.go b/purchaseapp/repository/mysql/order.go
new file mode 100644
index 00000000..279aa351
--- /dev/null
+++ b/purchaseapp/repository/mysql/order.go
@@ -0,0 +1,69 @@
+package mysql
+
+import (
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/entity"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+	"git.gocasts.ir/ebhomengo/niki/types"
+)
+
+type DB struct {
+	conn *mysql.DB
+}
+
+func New(db *mysql.DB) *DB {
+	return &DB{conn: db}
+}
+
+func (d *DB) CreateOrder(order entity.Order, orderItems []entity.OrderItem) (types.ID, error) {
+
+	const Op = "repository.mysql.order.createorder"
+	tx, err := d.conn.Conn().Begin()
+
+	if err != nil {
+		return 0, richerror.New(Op).WithErr(err)
+	}
+
+	defer tx.Rollback()
+
+	query := "insert into orders(user_id, address, shipping_id," +
+		" payment_method, payment_status, process_status," +
+		" total_amount, total_discount) values (?, ?, ?, ?, ?, ?, ?, ?);"
+	res, oErr := tx.Exec(query, order.UserID, order.Address, order.ShippingID,
+		order.PaymentMethod, order.PaymentStatus, order.ProcessStatus,
+		order.TotalAmount, order.TotalDiscount)
+
+	if oErr != nil {
+		return 0, richerror.New(Op).WithErr(oErr)
+	}
+	orderID, insertIDErr := res.LastInsertId()
+	if insertIDErr != nil {
+		return 0, richerror.New(Op).WithErr(insertIDErr)
+	}
+
+	orderItemQuery := "insert into order_items(order_id, product_id, quantity, price, price_with_discount) values(?, ?, ?, ?, ?);"
+	for _, item := range orderItems {
+		_, iErr := tx.Exec(orderItemQuery, orderID, item.ProductID, item.Quantity, item.Price, item.PriceWithDiscount)
+		if iErr != nil {
+			return 0, richerror.New(Op).WithErr(iErr)
+		}
+	}
+
+	if err := tx.Commit(); err != nil {
+		return 0, richerror.New(Op).WithErr(err)
+	}
+
+	return types.ID(orderID), nil
+}
+
+func (d *DB) UpdateOrderProcessStatus(orderID types.ID, status string) (bool, error) {
+	const Op = "repository.mysql.order.update-order-process-status"
+	_, err := d.conn.Conn().Exec("update orders set process_status=? where id=?;", status, orderID)
+
+	if err != nil {
+		return false, richerror.New(Op).WithErr(err)
+	}
+
+	return true, nil
+
+}
diff --git a/purchaseapp/service/invoice/param.go b/purchaseapp/service/invoice/param.go
deleted file mode 100644
index 958a6107..00000000
--- a/purchaseapp/service/invoice/param.go
+++ /dev/null
@@ -1 +0,0 @@
-package invoice
diff --git a/purchaseapp/service/invoice/service.go b/purchaseapp/service/invoice/service.go
deleted file mode 100644
index 63c4a3f5..00000000
--- a/purchaseapp/service/invoice/service.go
+++ /dev/null
@@ -1,4 +0,0 @@
-package invoice
-
-type Service struct {
-}
diff --git a/purchaseapp/service/invoice/validator.go b/purchaseapp/service/invoice/validator.go
deleted file mode 100644
index 958a6107..00000000
--- a/purchaseapp/service/invoice/validator.go
+++ /dev/null
@@ -1 +0,0 @@
-package invoice
diff --git a/purchaseapp/service/order/param.go b/purchaseapp/service/order/param.go
index 175f0c10..d4a589f9 100644
--- a/purchaseapp/service/order/param.go
+++ b/purchaseapp/service/order/param.go
@@ -1 +1,20 @@
 package order
+
+import (
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/entity"
+	"git.gocasts.ir/ebhomengo/niki/types"
+)
+
+type CreateOrderRequest struct {
+	UserID        types.ID             `json:"user_id"`
+	Address       string               `json:"address"`
+	ShippingID    types.ID             `json:"shipping_id"`
+	PaymentMethod entity.PaymentMethod `json:"payment_method"`
+	TotalAmount   types.Price          `json:"total_amount"`
+	TotalDiscount types.Price          `json:"total_discount"`
+	OrderItems    []entity.OrderItem   `json:"order_items"`
+}
+
+type CreateOrderResponse struct {
+	OrderID types.ID
+}
diff --git a/purchaseapp/service/order/service.go b/purchaseapp/service/order/service.go
index 4ddf977f..21690140 100644
--- a/purchaseapp/service/order/service.go
+++ b/purchaseapp/service/order/service.go
@@ -1,4 +1,42 @@
 package order
 
+import (
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/purchaseapp/entity"
+	"git.gocasts.ir/ebhomengo/niki/types"
+)
+
 type Service struct {
+	repo Repo
+}
+
+type Repo interface {
+	CreateOrder(order entity.Order, orderItems []entity.OrderItem) (types.ID, error)
+	UpdateOrderProcessStatus(orderID types.ID, status string) (bool, error)
+}
+
+func New(orderRepo Repo) Service {
+	return Service{repo: orderRepo}
+}
+
+func (s Service) CreateOrder(order entity.Order, orderItems []entity.OrderItem) (CreateOrderResponse, error) {
+	const Op = "purchaseapp.service.CreateOrder"
+	orderID, err := s.repo.CreateOrder(order, orderItems)
+
+	if err != nil {
+		return CreateOrderResponse{}, richerror.New(Op).WithErr(err)
+	}
+
+	return CreateOrderResponse{OrderID: orderID}, nil
+}
+
+func (s Service) UpdateOrderProcessStatus(orderID types.ID, status string) (bool, error) {
+
+	const Op = "purchaseapp.service.UpdateOrderProcessStatus"
+	_, err := s.repo.UpdateOrderProcessStatus(orderID, status)
+	if err != nil {
+		return false, richerror.New(Op).WithErr(err)
+	}
+
+	return true, nil
 }
diff --git a/repository/mysql/db.go b/repository/mysql/db.go
index eefe5508..1c8b08a1 100644
--- a/repository/mysql/db.go
+++ b/repository/mysql/db.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	_ "github.com/go-sql-driver/mysql"
 	"sync"
 	"time"
 
diff --git a/types/count.go b/types/count.go
new file mode 100644
index 00000000..ff20ea41
--- /dev/null
+++ b/types/count.go
@@ -0,0 +1,3 @@
+package types
+
+type Count uint32
diff --git a/types/id.go b/types/id.go
new file mode 100644
index 00000000..fb0c5a25
--- /dev/null
+++ b/types/id.go
@@ -0,0 +1,3 @@
+package types
+
+type ID uint64
diff --git a/types/price.go b/types/price.go
new file mode 100644
index 00000000..195869d4
--- /dev/null
+++ b/types/price.go
@@ -0,0 +1,3 @@
+package types
+
+type Price uint64