diff --git a/Sources/src/main/kotlin/allin/data/AllInDataSource.kt b/Sources/src/main/kotlin/allin/data/AllInDataSource.kt
index a0861bb..4cf498b 100644
--- a/Sources/src/main/kotlin/allin/data/AllInDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/AllInDataSource.kt
@@ -4,4 +4,5 @@ abstract class AllInDataSource {
     abstract val userDataSource: UserDataSource
     abstract val betDataSource: BetDataSource
     abstract val participationDataSource: ParticipationDataSource
+    abstract val friendDataSource: FriendDataSource
 }
\ No newline at end of file
diff --git a/Sources/src/main/kotlin/allin/data/FriendDataSource.kt b/Sources/src/main/kotlin/allin/data/FriendDataSource.kt
index 5a57e22..05b0658 100644
--- a/Sources/src/main/kotlin/allin/data/FriendDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/FriendDataSource.kt
@@ -1,8 +1,10 @@
 package allin.data
 
+import allin.model.User
+
 interface FriendDataSource {
     fun addFriend(sender: String, receiver: String)
-    fun getFriendFromUserId(id: String)
+    fun getFriendFromUserId(id: String): List<User>
     fun getFriendFromUsername(username: String)
     fun deleteFriend(senderId: String, receiverId: String)
     fun isFriend(firstUser: String, secondUser: String)
diff --git a/Sources/src/main/kotlin/allin/data/mock/MockDataSource.kt b/Sources/src/main/kotlin/allin/data/mock/MockDataSource.kt
index 6df3197..36517cc 100644
--- a/Sources/src/main/kotlin/allin/data/mock/MockDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/mock/MockDataSource.kt
@@ -1,9 +1,6 @@
 package allin.data.mock
 
-import allin.data.AllInDataSource
-import allin.data.BetDataSource
-import allin.data.ParticipationDataSource
-import allin.data.UserDataSource
+import allin.data.*
 import allin.model.Bet
 import allin.model.BetResult
 import allin.model.Participation
@@ -30,4 +27,5 @@ class MockDataSource : AllInDataSource() {
     override val userDataSource: UserDataSource by lazy { MockUserDataSource(mockData) }
     override val betDataSource: BetDataSource by lazy { MockBetDataSource(mockData) }
     override val participationDataSource: ParticipationDataSource by lazy { MockParticipationDataSource(mockData) }
+    override val friendDataSource: FriendDataSource by lazy { MockFriendDataSource(mockData) }
 }
diff --git a/Sources/src/main/kotlin/allin/data/mock/MockFriendDataSource.kt b/Sources/src/main/kotlin/allin/data/mock/MockFriendDataSource.kt
new file mode 100644
index 0000000..ce77707
--- /dev/null
+++ b/Sources/src/main/kotlin/allin/data/mock/MockFriendDataSource.kt
@@ -0,0 +1,26 @@
+package allin.data.mock
+
+import allin.data.FriendDataSource
+import allin.model.User
+
+class MockFriendDataSource(mockData: MockDataSource.MockData) : FriendDataSource {
+    override fun addFriend(sender: String, receiver: String) {
+        TODO("Not yet implemented")
+    }
+
+    override fun getFriendFromUserId(id: String): List<User> {
+        TODO("Not yet implemented")
+    }
+
+    override fun getFriendFromUsername(username: String) {
+        TODO("Not yet implemented")
+    }
+
+    override fun deleteFriend(senderId: String, receiverId: String) {
+        TODO("Not yet implemented")
+    }
+
+    override fun isFriend(firstUser: String, secondUser: String) {
+        TODO("Not yet implemented")
+    }
+}
\ No newline at end of file
diff --git a/Sources/src/main/kotlin/allin/data/postgres/PostgresDataSource.kt b/Sources/src/main/kotlin/allin/data/postgres/PostgresDataSource.kt
index 335d111..26e15c8 100644
--- a/Sources/src/main/kotlin/allin/data/postgres/PostgresDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/postgres/PostgresDataSource.kt
@@ -1,9 +1,6 @@
 package allin.data.postgres
 
-import allin.data.AllInDataSource
-import allin.data.BetDataSource
-import allin.data.ParticipationDataSource
-import allin.data.UserDataSource
+import allin.data.*
 import allin.ext.execute
 import org.ktorm.database.Database
 
@@ -95,9 +92,20 @@ class PostgresDataSource : AllInDataSource() {
             )
             """.trimIndent()
         )
+
+        database.execute(
+            """
+                CREATE TABLE IF NOT EXISTS friend(
+                    sender VARCHAR(255),
+                    receiver VARCHAR(255),
+                    CONSTRAINT pk_friend PRIMARY KEY (sender,receiver)
+               )
+            """.trimIndent()
+        )
     }
 
     override val userDataSource: UserDataSource by lazy { PostgresUserDataSource(database) }
     override val betDataSource: BetDataSource by lazy { PostgresBetDataSource(database) }
     override val participationDataSource: ParticipationDataSource by lazy { PostgresParticipationDataSource(database) }
+    override val friendDataSource: FriendDataSource by lazy { PostgresFriendDataSource(database) }
 }
\ No newline at end of file
diff --git a/Sources/src/main/kotlin/allin/data/postgres/PostgresFriendDataSource.kt b/Sources/src/main/kotlin/allin/data/postgres/PostgresFriendDataSource.kt
index 050a3a9..9354419 100644
--- a/Sources/src/main/kotlin/allin/data/postgres/PostgresFriendDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/postgres/PostgresFriendDataSource.kt
@@ -1,15 +1,21 @@
 package allin.data.postgres
 
 import allin.data.FriendDataSource
+import allin.data.postgres.entities.FriendsEntity
+import allin.model.User
 import org.ktorm.database.Database
+import org.ktorm.dsl.insert
 
 class PostgresFriendDataSource(private val database: Database) : FriendDataSource {
     override fun addFriend(sender: String, receiver: String) {
-//        TODO("Not yet implemented")
+        database.insert(FriendsEntity) {
+            set(it.sender, sender)
+            set(it.receiver, receiver)
+        }
     }
 
-    override fun getFriendFromUserId(id: String) {
-        TODO("Not yet implemented")
+    override fun getFriendFromUserId(id: String): List<User> {
+        TODO()
     }
 
     override fun getFriendFromUsername(username: String) {
diff --git a/Sources/src/main/kotlin/allin/data/postgres/entities/FriendEntity.kt b/Sources/src/main/kotlin/allin/data/postgres/entities/FriendEntity.kt
new file mode 100644
index 0000000..a436c71
--- /dev/null
+++ b/Sources/src/main/kotlin/allin/data/postgres/entities/FriendEntity.kt
@@ -0,0 +1,15 @@
+package allin.data.postgres.entities
+
+import org.ktorm.entity.Entity
+import org.ktorm.schema.Table
+import org.ktorm.schema.varchar
+
+interface FriendEntity : Entity<FriendEntity> {
+    val sender: String
+    val receiver: String
+}
+
+object FriendsEntity : Table<FriendEntity>("friend") {
+    val sender = varchar("id").primaryKey().bindTo { it.sender }
+    val receiver = varchar("bet").primaryKey().bindTo { it.receiver }
+}
\ No newline at end of file