diff --git a/donateApp/service/entity.go b/donateApp/service/entity.go
deleted file mode 100644
index 6d43c336..00000000
--- a/donateApp/service/entity.go
+++ /dev/null
@@ -1 +0,0 @@
-package service
diff --git a/donateApp/service/entity/campiagn.go b/donateApp/service/entity/campiagn.go
new file mode 100644
index 00000000..bd914808
--- /dev/null
+++ b/donateApp/service/entity/campiagn.go
@@ -0,0 +1,47 @@
+package service
+
+
+import (
+	"time"
+)
+
+// --- Type Aliases ---
+
+// UserID is a type alias for clarity, representing foreign keys to the User service
+type UserID uint32
+
+// TransactionID is a type alias for clarity, representing foreign keys to the Transaction service
+type TransactionID uint32
+
+// CampaignID is a type alias for clarity, representing primary keys for Campaigns
+type CampaignID uint32
+
+// DonationID is a type alias for clarity, representing primary keys for Donations
+type DonationID uint32
+
+// --- Campaign Module Entities ---
+
+// CampaignStatus represents the possible states of a campaign
+type CampaignStatus string
+
+const (
+	StatusActive    CampaignStatus = "active"
+	StatusCompleted CampaignStatus = "completed"
+	StatusCancelled CampaignStatus = "cancelled"
+	StatusExpired   CampaignStatus = "expired" // New status for deadlines
+)
+
+// Campaign represents a fundraising campaign entity
+type Campaign struct {
+	ID                 CampaignID     `json:"id"`
+	Title              string         `json:"title"`
+	Description        string         `json:"description"`
+	GoalAmount         float64        `json:"goal_amount"` // Using float64 for decimal, consider using a dedicated decimal type for precision
+	RaisedAmount       float64        `json:"raised_amount"`
+	Status             CampaignStatus `json:"status"`
+	CreatedAt          time.Time      `json:"created_at"`
+	DeadlineAt         *time.Time     `json:"deadline_at,omitempty"` // Pointer to time.Time, allows nil for no deadline. omitempty hides if nil.
+	AdminID            UserID         `json:"admin_id"`              // Foreign Key to User service
+	InitiatedByUserID  *UserID        `json:"initiated_by_user_id,omitempty"` // Pointer to UserID, allows nil. omitempty hides if nil.
+}
+
diff --git a/donateApp/service/entity/donation.go b/donateApp/service/entity/donation.go
new file mode 100644
index 00000000..3c064929
--- /dev/null
+++ b/donateApp/service/entity/donation.go
@@ -0,0 +1,25 @@
+package service
+
+
+
+// DonationLevel represents the level of a donation (e.g., Bronze, Silver, Gold)
+type DonationLevel string
+
+const (
+	DonationLevelBronze DonationLevel = "Bronze"
+	DonationLevelSilver DonationLevel = "Silver"
+	DonationLevelGold   DonationLevel = "Gold"
+)
+
+// Donation represents a donation made to a campaign
+type Donation struct {
+	ID            DonationID    `json:"id"`
+	UserID        UserID        `json:"user_id"` // Foreign Key to User service
+	CampaignID    CampaignID    `json:"campaign_id"` // Foreign Key to Campaign
+	Amount        float64       `json:"amount"` // Using float64 for decimal, consider a dedicated decimal type
+	PointsEarned   int       `json:"points_earned"` // امتیازی که از این تراکنش خاص کسب شده
+	TransactionID TransactionID `json:"transaction_id"` // Foreign Key to Transaction service
+	CreatedAt     time.Time     `json:"created_at"`
+	DonationLevel *DonationLevel `json:"donation_level,omitempty"` // Pointer to DonationLevel, allows nil. omitempty hides if nil.
+}
+