diff --git a/src/comment.rs b/src/comment.rs
index a87de3b..e7ea416 100644
--- a/src/comment.rs
+++ b/src/comment.rs
@@ -8,6 +8,7 @@ use crate::Id;
 
 pub mod data;
 pub mod db_entry;
+pub mod mapped;
 pub mod pipeline;
 pub mod provider;
 
diff --git a/src/comment/provider.rs b/src/comment/provider.rs
new file mode 100644
index 0000000..7f045a1
--- /dev/null
+++ b/src/comment/provider.rs
@@ -0,0 +1,51 @@
+use anyhow::Result;
+use async_trait::async_trait;
+
+use crate::comment::data::CommentData;
+use crate::comment::mapped::MappedCommentData;
+use crate::comment::pipeline::del::CommentDelPipeline;
+use crate::comment::pipeline::get::CommentGetPipeline;
+use crate::comment::pipeline::ini::CommentIniPipeline;
+use crate::comment::pipeline::set::CommentSetPipeline;
+use crate::Id;
+
+#[async_trait]
+pub trait CommentProvider {
+    async fn get_comment(&self, id: Id) -> Result<MappedCommentData>;
+    async fn ini_comment(&self, data: CommentData) -> Result<Id>;
+    async fn del_comment(&self, id: Id) -> Result<()>;
+}
+
+pub struct DefaultCommentProvider {
+    ini: Box<dyn CommentIniPipeline>,
+    get: Box<dyn CommentGetPipeline>,
+    set: Box<dyn CommentSetPipeline>,
+    del: Box<dyn CommentDelPipeline>
+}
+
+impl DefaultCommentProvider {
+    pub fn new(
+        ini: Box<dyn CommentIniPipeline>,
+        get: Box<dyn CommentGetPipeline>,
+        set: Box<dyn CommentSetPipeline>,
+        del: Box<dyn CommentDelPipeline>
+    ) -> Self {
+        DefaultCommentProvider { ini, get, set, del }
+    }
+}
+
+#[async_trait]
+impl CommentProvider for DefaultCommentProvider {
+    async fn get_comment(&self, id: Id) -> Result<MappedCommentData> {
+        //self.get.get_data(id).await
+        todo!()
+    }
+
+    async fn ini_comment(&self, data: CommentData) -> Result<Id> {
+        self.ini.call(data).await
+    }
+
+    async fn del_comment(&self, id: Id) -> Result<()> {
+        self.del.call(id).await
+    }
+}
diff --git a/src/post.rs b/src/post.rs
index 7d69ad1..0196f69 100644
--- a/src/post.rs
+++ b/src/post.rs
@@ -8,6 +8,7 @@ use crate::Id;
 
 pub mod data;
 pub mod db_entry;
+pub mod mapped;
 pub mod pipeline;
 pub mod provider;
 
diff --git a/src/post/provider.rs b/src/post/provider.rs
new file mode 100644
index 0000000..e5db426
--- /dev/null
+++ b/src/post/provider.rs
@@ -0,0 +1,49 @@
+use anyhow::Result;
+use async_trait::async_trait;
+
+use crate::post::data::PostData;
+use crate::post::mapped::MappedPostData;
+use crate::post::pipeline::del::PostDelPipeline;
+use crate::post::pipeline::get::PostGetPipeline;
+use crate::post::pipeline::ini::PostIniPipeline;
+use crate::post::pipeline::set::PostSetPipeline;
+use crate::Id;
+
+#[async_trait]
+pub trait PostProvider {
+    async fn get_post(&self, id: Id) -> Result<MappedPostData>;
+    async fn ini_post(&self, data: PostData) -> Result<Id>;
+    async fn del_post(&self, id: Id) -> Result<()>;
+}
+
+pub struct DefaultPostProvider {
+    ini: Box<dyn PostIniPipeline>,
+    get: Box<dyn PostGetPipeline>,
+    set: Box<dyn PostSetPipeline>,
+    del: Box<dyn PostDelPipeline>
+}
+
+impl DefaultPostProvider {
+    pub fn new(
+        ini: Box<dyn PostIniPipeline>,
+        get: Box<dyn PostGetPipeline>,
+        set: Box<dyn PostSetPipeline>,
+        del: Box<dyn PostDelPipeline>
+    ) -> Self {
+        DefaultPostProvider { ini, get, set, del }
+    }
+}
+
+#[async_trait]
+impl PostProvider for DefaultPostProvider {
+    async fn get_post(&self, id: Id) -> Result<MappedPostData> {
+        //self.get.get_data(id).await
+        todo!()
+    }
+
+    async fn ini_post(&self, data: PostData) -> Result<Id> {
+        self.ini.call(data).await
+    }
+
+    async fn del_post(&self, id: Id) -> Result<()> { self.del.call(id).await }
+}
diff --git a/src/user.rs b/src/user.rs
index 6451dd1..b6727ca 100644
--- a/src/user.rs
+++ b/src/user.rs
@@ -10,6 +10,7 @@ use crate::Id;
 
 pub mod data;
 pub mod db_entry;
+pub mod mapped;
 pub mod pipeline;
 pub mod provider;
 
diff --git a/src/user/provider.rs b/src/user/provider.rs
new file mode 100644
index 0000000..b08b743
--- /dev/null
+++ b/src/user/provider.rs
@@ -0,0 +1,49 @@
+use anyhow::Result;
+use async_trait::async_trait;
+
+use crate::user::data::UserData;
+use crate::user::mapped::MappedUserData;
+use crate::user::pipeline::del::UserDelPipeline;
+use crate::user::pipeline::get::UserGetPipeline;
+use crate::user::pipeline::ini::UserIniPipeline;
+use crate::user::pipeline::set::UserSetPipeline;
+use crate::Id;
+
+#[async_trait]
+pub trait UserProvider {
+    async fn get_user(&self, id: Id) -> Result<MappedUserData>;
+    async fn ini_user(&self, data: UserData) -> Result<Id>;
+    async fn del_user(&self, id: Id) -> Result<()>;
+}
+
+pub struct DefaultUserProvider {
+    ini: Box<dyn UserIniPipeline>,
+    get: Box<dyn UserGetPipeline>,
+    set: Box<dyn UserSetPipeline>,
+    del: Box<dyn UserDelPipeline>
+}
+
+impl DefaultUserProvider {
+    pub fn new(
+        ini: Box<dyn UserIniPipeline>,
+        get: Box<dyn UserGetPipeline>,
+        set: Box<dyn UserSetPipeline>,
+        del: Box<dyn UserDelPipeline>
+    ) -> Self {
+        DefaultUserProvider { ini, get, set, del }
+    }
+}
+
+#[async_trait]
+impl UserProvider for DefaultUserProvider {
+    async fn get_user(&self, id: Id) -> Result<MappedUserData> {
+        //self.get.get_data(id).await
+        todo!()
+    }
+
+    async fn ini_user(&self, data: UserData) -> Result<Id> {
+        self.ini.call(data).await
+    }
+
+    async fn del_user(&self, id: Id) -> Result<()> { self.del.call(id).await }
+}