diff --git a/frontend/rust-lib/flowy-document/src/editor/document.rs b/frontend/rust-lib/flowy-document/src/editor/document.rs
index bf3ff469c8..8af53a5727 100644
--- a/frontend/rust-lib/flowy-document/src/editor/document.rs
+++ b/frontend/rust-lib/flowy-document/src/editor/document.rs
@@ -28,9 +28,9 @@ impl Document {
         }
     }
 
-    pub fn md5(&self) -> String {
-        // format!("{:x}", md5::compute(bytes))
-        "".to_owned()
+    pub fn document_md5(&self) -> String {
+        let bytes = self.tree.to_bytes();
+        format!("{:x}", md5::compute(&bytes))
     }
 
     pub fn get_tree(&self) -> &NodeTree {
diff --git a/frontend/rust-lib/flowy-document/src/editor/queue.rs b/frontend/rust-lib/flowy-document/src/editor/queue.rs
index ef415cb4f1..24448c9bca 100644
--- a/frontend/rust-lib/flowy-document/src/editor/queue.rs
+++ b/frontend/rust-lib/flowy-document/src/editor/queue.rs
@@ -63,7 +63,7 @@ impl DocumentQueue {
             Command::ComposeTransaction { transaction, ret } => {
                 self.document.write().await.apply_transaction(transaction.clone())?;
                 let _ = self
-                    .save_local_operations(transaction, self.document.read().await.md5())
+                    .save_local_operations(transaction, self.document.read().await.document_md5())
                     .await?;
                 let _ = ret.send(Ok(()));
             }
diff --git a/frontend/rust-lib/flowy-document/src/manager.rs b/frontend/rust-lib/flowy-document/src/manager.rs
index ac031ad35b..658e3e0a99 100644
--- a/frontend/rust-lib/flowy-document/src/manager.rs
+++ b/frontend/rust-lib/flowy-document/src/manager.rs
@@ -12,11 +12,8 @@ use flowy_revision::{
     RevisionCloudService, RevisionManager, RevisionPersistence, RevisionWebSocket, SQLiteRevisionSnapshotPersistence,
 };
 use flowy_sync::client_document::initial_delta_document_content;
-use flowy_sync::entities::{
-    document::DocumentIdPB,
-    revision::{md5, RepeatedRevision, Revision},
-    ws_data::ServerRevisionWSData,
-};
+use flowy_sync::entities::{document::DocumentIdPB, revision::Revision, ws_data::ServerRevisionWSData};
+use flowy_sync::util::md5;
 use lib_infra::future::FutureResult;
 use lib_ws::WSConnectState;
 use std::any::Any;
@@ -139,7 +136,7 @@ impl DocumentManager {
         Ok(())
     }
 
-    pub async fn create_document<T: AsRef<str>>(&self, doc_id: T, revisions: RepeatedRevision) -> FlowyResult<()> {
+    pub async fn create_document<T: AsRef<str>>(&self, doc_id: T, revisions: Vec<Revision>) -> FlowyResult<()> {
         let doc_id = doc_id.as_ref().to_owned();
         let db_pool = self.persistence.database.db_pool()?;
         // Maybe we could save the document to disk without creating the RevisionManager
diff --git a/frontend/rust-lib/flowy-document/src/old_editor/queue.rs b/frontend/rust-lib/flowy-document/src/old_editor/queue.rs
index bfe7336257..063ae4f254 100644
--- a/frontend/rust-lib/flowy-document/src/old_editor/queue.rs
+++ b/frontend/rust-lib/flowy-document/src/old_editor/queue.rs
@@ -3,7 +3,7 @@ use crate::DocumentUser;
 use async_stream::stream;
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyError;
-use flowy_revision::{OperationsMD5, RevisionManager, TransformOperations};
+use flowy_revision::{RevisionMD5, RevisionManager, TransformOperations};
 use flowy_sync::{
     client_document::{history::UndoResult, ClientDocument},
     entities::revision::{RevId, Revision},
@@ -70,7 +70,7 @@ impl EditDocumentQueue {
             EditorCommand::ComposeLocalOperations { operations, ret } => {
                 let mut document = self.document.write().await;
                 let _ = document.compose_operations(operations.clone())?;
-                let md5 = document.md5();
+                let md5 = document.document_md5();
                 drop(document);
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
@@ -78,16 +78,16 @@ impl EditDocumentQueue {
             EditorCommand::ComposeRemoteOperation { client_operations, ret } => {
                 let mut document = self.document.write().await;
                 let _ = document.compose_operations(client_operations.clone())?;
-                let md5 = document.md5();
+                let md5 = document.document_md5();
                 drop(document);
-                let _ = ret.send(Ok(md5));
+                let _ = ret.send(Ok(md5.into()));
             }
             EditorCommand::ResetOperations { operations, ret } => {
                 let mut document = self.document.write().await;
                 let _ = document.set_operations(operations);
-                let md5 = document.md5();
+                let md5 = document.document_md5();
                 drop(document);
-                let _ = ret.send(Ok(md5));
+                let _ = ret.send(Ok(md5.into()));
             }
             EditorCommand::TransformOperations { operations, ret } => {
                 let f = || async {
@@ -114,14 +114,14 @@ impl EditDocumentQueue {
             EditorCommand::Insert { index, data, ret } => {
                 let mut write_guard = self.document.write().await;
                 let operations = write_guard.insert(index, data)?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
             EditorCommand::Delete { interval, ret } => {
                 let mut write_guard = self.document.write().await;
                 let operations = write_guard.delete(interval)?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
@@ -132,14 +132,14 @@ impl EditDocumentQueue {
             } => {
                 let mut write_guard = self.document.write().await;
                 let operations = write_guard.format(interval, attribute)?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
             EditorCommand::Replace { interval, data, ret } => {
                 let mut write_guard = self.document.write().await;
                 let operations = write_guard.replace(interval, data)?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
@@ -152,14 +152,14 @@ impl EditDocumentQueue {
             EditorCommand::Undo { ret } => {
                 let mut write_guard = self.document.write().await;
                 let UndoResult { operations } = write_guard.undo()?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
             EditorCommand::Redo { ret } => {
                 let mut write_guard = self.document.write().await;
                 let UndoResult { operations } = write_guard.redo()?;
-                let md5 = write_guard.md5();
+                let md5 = write_guard.document_md5();
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
@@ -197,11 +197,11 @@ pub(crate) enum EditorCommand {
     },
     ComposeRemoteOperation {
         client_operations: DeltaTextOperations,
-        ret: Ret<OperationsMD5>,
+        ret: Ret<RevisionMD5>,
     },
     ResetOperations {
         operations: DeltaTextOperations,
-        ret: Ret<OperationsMD5>,
+        ret: Ret<RevisionMD5>,
     },
     TransformOperations {
         operations: DeltaTextOperations,
diff --git a/frontend/rust-lib/flowy-document/src/old_editor/web_socket.rs b/frontend/rust-lib/flowy-document/src/old_editor/web_socket.rs
index 9b9a870f1f..bbaa1c511f 100644
--- a/frontend/rust-lib/flowy-document/src/old_editor/web_socket.rs
+++ b/frontend/rust-lib/flowy-document/src/old_editor/web_socket.rs
@@ -136,7 +136,7 @@ impl ConflictResolver<DeltaDocumentResolveOperations> for DocumentConflictResolv
     fn compose_operations(
         &self,
         operations: DeltaDocumentResolveOperations,
-    ) -> BoxResultFuture<OperationsMD5, FlowyError> {
+    ) -> BoxResultFuture<RevisionMD5, FlowyError> {
         let tx = self.edit_cmd_tx.clone();
         let operations = operations.into_inner();
         Box::pin(async move {
@@ -172,10 +172,7 @@ impl ConflictResolver<DeltaDocumentResolveOperations> for DocumentConflictResolv
         })
     }
 
-    fn reset_operations(
-        &self,
-        operations: DeltaDocumentResolveOperations,
-    ) -> BoxResultFuture<OperationsMD5, FlowyError> {
+    fn reset_operations(&self, operations: DeltaDocumentResolveOperations) -> BoxResultFuture<RevisionMD5, FlowyError> {
         let tx = self.edit_cmd_tx.clone();
         let operations = operations.into_inner();
         Box::pin(async move {
diff --git a/frontend/rust-lib/flowy-document/src/services/migration.rs b/frontend/rust-lib/flowy-document/src/services/migration.rs
index 6dc8bed07d..d922486e47 100644
--- a/frontend/rust-lib/flowy-document/src/services/migration.rs
+++ b/frontend/rust-lib/flowy-document/src/services/migration.rs
@@ -4,9 +4,9 @@ use crate::DocumentDatabase;
 use bytes::Bytes;
 use flowy_database::kv::KV;
 use flowy_error::FlowyResult;
-use flowy_revision::disk::{RevisionDiskCache, RevisionRecord};
-use flowy_sync::entities::revision::{md5, Revision};
-use flowy_sync::util::make_operations_from_revisions;
+use flowy_revision::disk::{RevisionDiskCache, SyncRecord};
+use flowy_sync::entities::revision::Revision;
+use flowy_sync::util::{make_operations_from_revisions, md5};
 use std::sync::Arc;
 
 const V1_MIGRATION: &str = "DOCUMENT_V1_MIGRATION";
@@ -44,7 +44,7 @@ impl DocumentMigration {
                         let bytes = Bytes::from(transaction.to_bytes()?);
                         let md5 = format!("{:x}", md5::compute(&bytes));
                         let revision = Revision::new(&document_id, 0, 1, bytes, &self.user_id, md5);
-                        let record = RevisionRecord::new(revision);
+                        let record = SyncRecord::new(revision);
                         match disk_cache.create_revision_records(vec![record]) {
                             Ok(_) => {}
                             Err(err) => {
diff --git a/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v0.rs b/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v0.rs
index 9aa9e2e77b..7a4485861f 100644
--- a/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v0.rs
+++ b/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v0.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{RevType, Revision, RevisionRange},
     util::md5,
@@ -23,7 +23,7 @@ pub struct SQLiteDeltaDocumentRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDeltaDocumentRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = DeltaRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -37,7 +37,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDeltaDocumentRevisionPersi
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = DeltaRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -47,7 +47,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDeltaDocumentRevisionPersi
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = DeltaRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -74,7 +74,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDeltaDocumentRevisionPersi
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -97,7 +97,7 @@ impl SQLiteDeltaDocumentRevisionPersistence {
 pub struct DeltaRevisionSql {}
 
 impl DeltaRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
 
         let records = revision_records
@@ -143,7 +143,7 @@ impl DeltaRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::rev_table.filter(dsl::doc_id.eq(object_id)).into_boxed();
         if let Some(rev_ids) = rev_ids {
             sql = sql.filter(dsl::rev_id.eq_any(rev_ids));
@@ -162,7 +162,7 @@ impl DeltaRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -244,7 +244,7 @@ impl std::default::Default for TextRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.doc_id,
@@ -254,7 +254,7 @@ fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> Revisio
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v1.rs b/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v1.rs
index da82a4eee9..d02528a79f 100644
--- a/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v1.rs
+++ b/frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v1.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{Revision, RevisionRange},
     util::md5,
@@ -22,7 +22,7 @@ pub struct SQLiteDocumentRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDocumentRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = DocumentRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -36,7 +36,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDocumentRevisionPersistenc
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = DocumentRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -46,7 +46,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDocumentRevisionPersistenc
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = DocumentRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -73,7 +73,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteDocumentRevisionPersistenc
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -96,7 +96,7 @@ impl SQLiteDocumentRevisionPersistence {
 struct DocumentRevisionSql {}
 
 impl DocumentRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
         let records = revision_records
             .into_iter()
@@ -142,7 +142,7 @@ impl DocumentRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::document_rev_table
             .filter(dsl::document_id.eq(object_id))
             .into_boxed();
@@ -163,7 +163,7 @@ impl DocumentRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::document_rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -220,7 +220,7 @@ impl std::default::Default for DocumentRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: DocumentRevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: DocumentRevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.document_id,
@@ -230,7 +230,7 @@ fn mk_revision_record_from_table(user_id: &str, table: DocumentRevisionTable) ->
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-folder/src/services/persistence/migration.rs b/frontend/rust-lib/flowy-folder/src/services/persistence/migration.rs
index 7f363980ab..49ff81f128 100644
--- a/frontend/rust-lib/flowy-folder/src/services/persistence/migration.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/persistence/migration.rs
@@ -9,11 +9,12 @@ use flowy_error::{FlowyError, FlowyResult};
 use flowy_folder_data_model::revision::{AppRevision, FolderRevision, ViewRevision, WorkspaceRevision};
 use flowy_revision::reset::{RevisionResettable, RevisionStructReset};
 use flowy_sync::client_folder::make_folder_rev_json_str;
+use flowy_sync::client_folder::FolderPad;
 use flowy_sync::entities::revision::Revision;
 use flowy_sync::server_folder::FolderOperationsBuilder;
-use flowy_sync::{client_folder::FolderPad, entities::revision::md5};
 
 use crate::services::persistence::rev_sqlite::SQLiteFolderRevisionPersistence;
+use flowy_sync::util::md5;
 use std::sync::Arc;
 
 const V1_MIGRATION: &str = "FOLDER_V1_MIGRATION";
diff --git a/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs b/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
index a0da34aee2..147effff9b 100644
--- a/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
@@ -11,7 +11,7 @@ use crate::{
 use flowy_database::ConnectionPool;
 use flowy_error::{FlowyError, FlowyResult};
 use flowy_folder_data_model::revision::{AppRevision, TrashRevision, ViewRevision, WorkspaceRevision};
-use flowy_revision::disk::{RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{client_folder::FolderPad, entities::revision::Revision};
 
 use crate::services::persistence::rev_sqlite::SQLiteFolderRevisionPersistence;
@@ -112,7 +112,7 @@ impl FolderPersistence {
         let json = folder.to_json()?;
         let delta_data = FolderOperationsBuilder::new().insert(&json).build().json_bytes();
         let revision = Revision::initial_revision(user_id, folder_id.as_ref(), delta_data);
-        let record = RevisionRecord {
+        let record = SyncRecord {
             revision,
             state: RevisionState::Sync,
             write_to_disk: true,
diff --git a/frontend/rust-lib/flowy-folder/src/services/persistence/rev_sqlite/folder_rev_sqlite.rs b/frontend/rust-lib/flowy-folder/src/services/persistence/rev_sqlite/folder_rev_sqlite.rs
index a80c95ba15..c094d4be8c 100644
--- a/frontend/rust-lib/flowy-folder/src/services/persistence/rev_sqlite/folder_rev_sqlite.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/persistence/rev_sqlite/folder_rev_sqlite.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{RevType, Revision, RevisionRange},
     util::md5,
@@ -23,7 +23,7 @@ pub struct SQLiteFolderRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteFolderRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = FolderRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -37,7 +37,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteFolderRevisionPersistence
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = FolderRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -47,7 +47,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteFolderRevisionPersistence
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = FolderRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -74,7 +74,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteFolderRevisionPersistence
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -97,7 +97,7 @@ impl SQLiteFolderRevisionPersistence {
 struct FolderRevisionSql {}
 
 impl FolderRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
 
         let records = revision_records
@@ -143,7 +143,7 @@ impl FolderRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::rev_table.filter(dsl::doc_id.eq(object_id)).into_boxed();
         if let Some(rev_ids) = rev_ids {
             sql = sql.filter(dsl::rev_id.eq_any(rev_ids));
@@ -162,7 +162,7 @@ impl FolderRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -220,7 +220,7 @@ impl std::default::Default for TextRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.doc_id,
@@ -230,7 +230,7 @@ fn mk_revision_record_from_table(user_id: &str, table: RevisionTable) -> Revisio
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-folder/src/services/web_socket.rs b/frontend/rust-lib/flowy-folder/src/services/web_socket.rs
index 204ebc7f04..106e7ccb4b 100644
--- a/frontend/rust-lib/flowy-folder/src/services/web_socket.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/web_socket.rs
@@ -78,12 +78,12 @@ struct FolderConflictResolver {
 }
 
 impl ConflictResolver<FolderResolveOperations> for FolderConflictResolver {
-    fn compose_operations(&self, operations: FolderResolveOperations) -> BoxResultFuture<OperationsMD5, FlowyError> {
+    fn compose_operations(&self, operations: FolderResolveOperations) -> BoxResultFuture<RevisionMD5, FlowyError> {
         let operations = operations.into_inner();
         let folder_pad = self.folder_pad.clone();
         Box::pin(async move {
             let md5 = folder_pad.write().compose_remote_operations(operations)?;
-            Ok(md5)
+            Ok(md5.into())
         })
     }
 
@@ -113,11 +113,11 @@ impl ConflictResolver<FolderResolveOperations> for FolderConflictResolver {
         })
     }
 
-    fn reset_operations(&self, operations: FolderResolveOperations) -> BoxResultFuture<OperationsMD5, FlowyError> {
+    fn reset_operations(&self, operations: FolderResolveOperations) -> BoxResultFuture<RevisionMD5, FlowyError> {
         let folder_pad = self.folder_pad.clone();
         Box::pin(async move {
             let md5 = folder_pad.write().reset_folder(operations.into_inner())?;
-            Ok(md5)
+            Ok(md5.into())
         })
     }
 }
diff --git a/frontend/rust-lib/flowy-grid/src/manager.rs b/frontend/rust-lib/flowy-grid/src/manager.rs
index 9f91f64c98..72c6e808dc 100644
--- a/frontend/rust-lib/flowy-grid/src/manager.rs
+++ b/frontend/rust-lib/flowy-grid/src/manager.rs
@@ -15,7 +15,7 @@ use flowy_error::{FlowyError, FlowyResult};
 use flowy_grid_data_model::revision::{BuildGridContext, GridRevision, GridViewRevision};
 use flowy_revision::{RevisionManager, RevisionPersistence, RevisionWebSocket, SQLiteRevisionSnapshotPersistence};
 use flowy_sync::client_grid::{make_grid_block_operations, make_grid_operations, make_grid_view_operations};
-use flowy_sync::entities::revision::{RepeatedRevision, Revision};
+use flowy_sync::entities::revision::Revision;
 use std::sync::Arc;
 use tokio::sync::RwLock;
 
@@ -67,7 +67,7 @@ impl GridManager {
     }
 
     #[tracing::instrument(level = "debug", skip_all, err)]
-    pub async fn create_grid<T: AsRef<str>>(&self, grid_id: T, revisions: RepeatedRevision) -> FlowyResult<()> {
+    pub async fn create_grid<T: AsRef<str>>(&self, grid_id: T, revisions: Vec<Revision>) -> FlowyResult<()> {
         let grid_id = grid_id.as_ref();
         let db_pool = self.grid_user.db_pool()?;
         let rev_manager = self.make_grid_rev_manager(grid_id, db_pool)?;
@@ -77,7 +77,7 @@ impl GridManager {
     }
 
     #[tracing::instrument(level = "debug", skip_all, err)]
-    async fn create_grid_view<T: AsRef<str>>(&self, view_id: T, revisions: RepeatedRevision) -> FlowyResult<()> {
+    async fn create_grid_view<T: AsRef<str>>(&self, view_id: T, revisions: Vec<Revision>) -> FlowyResult<()> {
         let view_id = view_id.as_ref();
         let rev_manager = make_grid_view_rev_manager(&self.grid_user, view_id).await?;
         let _ = rev_manager.reset_object(revisions).await?;
@@ -85,7 +85,7 @@ impl GridManager {
     }
 
     #[tracing::instrument(level = "debug", skip_all, err)]
-    pub async fn create_grid_block<T: AsRef<str>>(&self, block_id: T, revisions: RepeatedRevision) -> FlowyResult<()> {
+    pub async fn create_grid_block<T: AsRef<str>>(&self, block_id: T, revisions: Vec<Revision>) -> FlowyResult<()> {
         let block_id = block_id.as_ref();
         let db_pool = self.grid_user.db_pool()?;
         let rev_manager = self.make_grid_block_rev_manager(block_id, db_pool)?;
@@ -208,9 +208,8 @@ pub async fn make_grid_view_data(
         // Create grid's block
         let grid_block_delta = make_grid_block_operations(block_meta_data);
         let block_delta_data = grid_block_delta.json_bytes();
-        let repeated_revision: RepeatedRevision =
-            Revision::initial_revision(user_id, block_id, block_delta_data).into();
-        let _ = grid_manager.create_grid_block(&block_id, repeated_revision).await?;
+        let revision = Revision::initial_revision(user_id, block_id, block_delta_data);
+        let _ = grid_manager.create_grid_block(&block_id, vec![revision]).await?;
     }
 
     // Will replace the grid_id with the value returned by the gen_grid_id()
@@ -220,9 +219,8 @@ pub async fn make_grid_view_data(
     // Create grid
     let grid_rev_delta = make_grid_operations(&grid_rev);
     let grid_rev_delta_bytes = grid_rev_delta.json_bytes();
-    let repeated_revision: RepeatedRevision =
-        Revision::initial_revision(user_id, &grid_id, grid_rev_delta_bytes.clone()).into();
-    let _ = grid_manager.create_grid(&grid_id, repeated_revision).await?;
+    let revision = Revision::initial_revision(user_id, &grid_id, grid_rev_delta_bytes.clone());
+    let _ = grid_manager.create_grid(&grid_id, vec![revision]).await?;
 
     // Create grid view
     let grid_view = if grid_view_revision_data.is_empty() {
@@ -232,9 +230,8 @@ pub async fn make_grid_view_data(
     };
     let grid_view_delta = make_grid_view_operations(&grid_view);
     let grid_view_delta_bytes = grid_view_delta.json_bytes();
-    let repeated_revision: RepeatedRevision =
-        Revision::initial_revision(user_id, view_id, grid_view_delta_bytes).into();
-    let _ = grid_manager.create_grid_view(view_id, repeated_revision).await?;
+    let revision = Revision::initial_revision(user_id, view_id, grid_view_delta_bytes);
+    let _ = grid_manager.create_grid_view(view_id, vec![revision]).await?;
 
     Ok(grid_rev_delta_bytes)
 }
diff --git a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_block_impl.rs b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_block_impl.rs
index 27b4e7790b..a4895ae5e8 100644
--- a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_block_impl.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_block_impl.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{Revision, RevisionRange},
     util::md5,
@@ -22,7 +22,7 @@ pub struct SQLiteGridBlockRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridBlockRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = GridMetaRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -36,7 +36,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridBlockRevisionPersisten
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = GridMetaRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -46,7 +46,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridBlockRevisionPersisten
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = GridMetaRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -73,7 +73,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridBlockRevisionPersisten
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -95,7 +95,7 @@ impl SQLiteGridBlockRevisionPersistence {
 
 struct GridMetaRevisionSql();
 impl GridMetaRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
 
         let records = revision_records
@@ -142,7 +142,7 @@ impl GridMetaRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::grid_meta_rev_table
             .filter(dsl::object_id.eq(object_id))
             .into_boxed();
@@ -163,7 +163,7 @@ impl GridMetaRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::grid_meta_rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -219,7 +219,7 @@ impl std::default::Default for GridBlockRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: GridBlockRevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: GridBlockRevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.object_id,
@@ -229,7 +229,7 @@ fn mk_revision_record_from_table(user_id: &str, table: GridBlockRevisionTable) -
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_impl.rs b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_impl.rs
index 5e86286f22..3fd121c5e3 100644
--- a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_impl.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_impl.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{Revision, RevisionRange},
     util::md5,
@@ -22,7 +22,7 @@ pub struct SQLiteGridRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = GridRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -36,7 +36,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridRevisionPersistence {
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = GridRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -46,7 +46,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridRevisionPersistence {
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = GridRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -73,7 +73,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridRevisionPersistence {
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -95,7 +95,7 @@ impl SQLiteGridRevisionPersistence {
 
 struct GridRevisionSql();
 impl GridRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
         let records = revision_records
             .into_iter()
@@ -141,7 +141,7 @@ impl GridRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::grid_rev_table.filter(dsl::object_id.eq(object_id)).into_boxed();
         if let Some(rev_ids) = rev_ids {
             sql = sql.filter(dsl::rev_id.eq_any(rev_ids));
@@ -160,7 +160,7 @@ impl GridRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::grid_rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -217,7 +217,7 @@ impl std::default::Default for GridRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: GridRevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: GridRevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.object_id,
@@ -227,7 +227,7 @@ fn mk_revision_record_from_table(user_id: &str, table: GridRevisionTable) -> Rev
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_view_impl.rs b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_view_impl.rs
index 737e7eaece..fe9490d0de 100644
--- a/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_view_impl.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_view_impl.rs
@@ -7,7 +7,7 @@ use flowy_database::{
     ConnectionPool,
 };
 use flowy_error::{internal_error, FlowyError, FlowyResult};
-use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionRecord, RevisionState};
+use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, RevisionState, SyncRecord};
 use flowy_sync::{
     entities::revision::{Revision, RevisionRange},
     util::md5,
@@ -31,7 +31,7 @@ impl SQLiteGridViewRevisionPersistence {
 impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridViewRevisionPersistence {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let _ = GridViewRevisionSql::create(revision_records, &*conn)?;
         Ok(())
@@ -45,7 +45,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridViewRevisionPersistenc
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let records = GridViewRevisionSql::read(&self.user_id, object_id, rev_ids, &*conn)?;
         Ok(records)
@@ -55,7 +55,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridViewRevisionPersistenc
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error)?;
         let revisions = GridViewRevisionSql::read_with_range(&self.user_id, object_id, range.clone(), conn)?;
         Ok(revisions)
@@ -82,7 +82,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridViewRevisionPersistenc
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         conn.immediate_transaction::<_, FlowyError, _>(|| {
@@ -95,7 +95,7 @@ impl RevisionDiskCache<Arc<ConnectionPool>> for SQLiteGridViewRevisionPersistenc
 
 struct GridViewRevisionSql();
 impl GridViewRevisionSql {
-    fn create(revision_records: Vec<RevisionRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
+    fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
         let records = revision_records
             .into_iter()
@@ -141,7 +141,7 @@ impl GridViewRevisionSql {
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let mut sql = dsl::grid_view_rev_table
             .filter(dsl::object_id.eq(object_id))
             .into_boxed();
@@ -162,7 +162,7 @@ impl GridViewRevisionSql {
         object_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<RevisionRecord>, FlowyError> {
+    ) -> Result<Vec<SyncRecord>, FlowyError> {
         let rev_tables = dsl::grid_view_rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -219,7 +219,7 @@ impl std::default::Default for GridViewRevisionState {
     }
 }
 
-fn mk_revision_record_from_table(user_id: &str, table: GridViewRevisionTable) -> RevisionRecord {
+fn mk_revision_record_from_table(user_id: &str, table: GridViewRevisionTable) -> SyncRecord {
     let md5 = md5(&table.data);
     let revision = Revision::new(
         &table.object_id,
@@ -229,7 +229,7 @@ fn mk_revision_record_from_table(user_id: &str, table: GridViewRevisionTable) ->
         user_id,
         md5,
     );
-    RevisionRecord {
+    SyncRecord {
         revision,
         state: table.state.into(),
         write_to_disk: false,
diff --git a/frontend/rust-lib/flowy-revision/src/cache/disk.rs b/frontend/rust-lib/flowy-revision/src/cache/disk.rs
index 06e85f9d5e..f89f36367b 100644
--- a/frontend/rust-lib/flowy-revision/src/cache/disk.rs
+++ b/frontend/rust-lib/flowy-revision/src/cache/disk.rs
@@ -5,23 +5,20 @@ use std::sync::Arc;
 
 pub trait RevisionDiskCache<Connection>: Sync + Send {
     type Error: Debug;
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error>;
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error>;
 
     fn get_connection(&self) -> Result<Connection, Self::Error>;
 
     // Read all the records if the rev_ids is None
-    fn read_revision_records(
-        &self,
-        object_id: &str,
-        rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error>;
+    fn read_revision_records(&self, object_id: &str, rev_ids: Option<Vec<i64>>)
+        -> Result<Vec<SyncRecord>, Self::Error>;
 
     // Read the revision which rev_id >= range.start && rev_id <= range.end
     fn read_revision_records_with_range(
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error>;
+    ) -> Result<Vec<SyncRecord>, Self::Error>;
 
     fn update_revision_record(&self, changesets: Vec<RevisionChangeset>) -> FlowyResult<()>;
 
@@ -34,7 +31,7 @@ pub trait RevisionDiskCache<Connection>: Sync + Send {
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error>;
 }
 
@@ -44,7 +41,7 @@ where
 {
     type Error = FlowyError;
 
-    fn create_revision_records(&self, revision_records: Vec<RevisionRecord>) -> Result<(), Self::Error> {
+    fn create_revision_records(&self, revision_records: Vec<SyncRecord>) -> Result<(), Self::Error> {
         (**self).create_revision_records(revision_records)
     }
 
@@ -56,7 +53,7 @@ where
         &self,
         object_id: &str,
         rev_ids: Option<Vec<i64>>,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         (**self).read_revision_records(object_id, rev_ids)
     }
 
@@ -64,7 +61,7 @@ where
         &self,
         object_id: &str,
         range: &RevisionRange,
-    ) -> Result<Vec<RevisionRecord>, Self::Error> {
+    ) -> Result<Vec<SyncRecord>, Self::Error> {
         (**self).read_revision_records_with_range(object_id, range)
     }
 
@@ -80,20 +77,20 @@ where
         &self,
         object_id: &str,
         deleted_rev_ids: Option<Vec<i64>>,
-        inserted_records: Vec<RevisionRecord>,
+        inserted_records: Vec<SyncRecord>,
     ) -> Result<(), Self::Error> {
         (**self).delete_and_insert_records(object_id, deleted_rev_ids, inserted_records)
     }
 }
 
 #[derive(Clone, Debug)]
-pub struct RevisionRecord {
+pub struct SyncRecord {
     pub revision: Revision,
     pub state: RevisionState,
     pub write_to_disk: bool,
 }
 
-impl RevisionRecord {
+impl SyncRecord {
     pub fn new(revision: Revision) -> Self {
         Self {
             revision,
diff --git a/frontend/rust-lib/flowy-revision/src/cache/memory.rs b/frontend/rust-lib/flowy-revision/src/cache/memory.rs
index 6120c3f224..ad6795437c 100644
--- a/frontend/rust-lib/flowy-revision/src/cache/memory.rs
+++ b/frontend/rust-lib/flowy-revision/src/cache/memory.rs
@@ -1,4 +1,4 @@
-use crate::disk::RevisionRecord;
+use crate::disk::SyncRecord;
 use crate::REVISION_WRITE_INTERVAL_IN_MILLIS;
 use dashmap::DashMap;
 use flowy_error::{FlowyError, FlowyResult};
@@ -7,15 +7,15 @@ use std::{borrow::Cow, sync::Arc, time::Duration};
 use tokio::{sync::RwLock, task::JoinHandle};
 
 pub(crate) trait RevisionMemoryCacheDelegate: Send + Sync {
-    fn checkpoint_tick(&self, records: Vec<RevisionRecord>) -> FlowyResult<()>;
+    fn send_sync(&self, records: Vec<SyncRecord>) -> FlowyResult<()>;
     fn receive_ack(&self, object_id: &str, rev_id: i64);
 }
 
 pub(crate) struct RevisionMemoryCache {
     object_id: String,
-    revs_map: Arc<DashMap<i64, RevisionRecord>>,
+    revs_map: Arc<DashMap<i64, SyncRecord>>,
     delegate: Arc<dyn RevisionMemoryCacheDelegate>,
-    pending_write_revs: Arc<RwLock<Vec<i64>>>,
+    defer_write_revs: Arc<RwLock<Vec<i64>>>,
     defer_save: RwLock<Option<JoinHandle<()>>>,
 }
 
@@ -25,7 +25,7 @@ impl RevisionMemoryCache {
             object_id: object_id.to_owned(),
             revs_map: Arc::new(DashMap::new()),
             delegate,
-            pending_write_revs: Arc::new(RwLock::new(vec![])),
+            defer_write_revs: Arc::new(RwLock::new(vec![])),
             defer_save: RwLock::new(None),
         }
     }
@@ -34,7 +34,7 @@ impl RevisionMemoryCache {
         self.revs_map.contains_key(rev_id)
     }
 
-    pub(crate) async fn add<'a>(&'a self, record: Cow<'a, RevisionRecord>) {
+    pub(crate) async fn add<'a>(&'a self, record: Cow<'a, SyncRecord>) {
         let record = match record {
             Cow::Borrowed(record) => record.clone(),
             Cow::Owned(record) => record,
@@ -43,11 +43,11 @@ impl RevisionMemoryCache {
         let rev_id = record.revision.rev_id;
         self.revs_map.insert(rev_id, record);
 
-        let mut write_guard = self.pending_write_revs.write().await;
+        let mut write_guard = self.defer_write_revs.write().await;
         if !write_guard.contains(&rev_id) {
             write_guard.push(rev_id);
             drop(write_guard);
-            self.make_checkpoint().await;
+            self.tick_checkpoint().await;
         }
     }
 
@@ -57,8 +57,8 @@ impl RevisionMemoryCache {
             Some(mut record) => record.ack(),
         }
 
-        if self.pending_write_revs.read().await.contains(rev_id) {
-            self.make_checkpoint().await;
+        if self.defer_write_revs.read().await.contains(rev_id) {
+            self.tick_checkpoint().await;
         } else {
             // The revision must be saved on disk if the pending_write_revs
             // doesn't contains the rev_id.
@@ -66,7 +66,7 @@ impl RevisionMemoryCache {
         }
     }
 
-    pub(crate) async fn get(&self, rev_id: &i64) -> Option<RevisionRecord> {
+    pub(crate) async fn get(&self, rev_id: &i64) -> Option<SyncRecord> {
         self.revs_map.get(rev_id).map(|r| r.value().clone())
     }
 
@@ -80,21 +80,21 @@ impl RevisionMemoryCache {
         }
     }
 
-    pub(crate) async fn get_with_range(&self, range: &RevisionRange) -> Result<Vec<RevisionRecord>, FlowyError> {
+    pub(crate) async fn get_with_range(&self, range: &RevisionRange) -> Result<Vec<SyncRecord>, FlowyError> {
         let revs = range
             .iter()
             .flat_map(|rev_id| self.revs_map.get(&rev_id).map(|record| record.clone()))
-            .collect::<Vec<RevisionRecord>>();
+            .collect::<Vec<SyncRecord>>();
         Ok(revs)
     }
 
-    pub(crate) async fn reset_with_revisions(&self, revision_records: Vec<RevisionRecord>) {
+    pub(crate) async fn reset_with_revisions(&self, revision_records: Vec<SyncRecord>) {
         self.revs_map.clear();
         if let Some(handler) = self.defer_save.write().await.take() {
             handler.abort();
         }
 
-        let mut write_guard = self.pending_write_revs.write().await;
+        let mut write_guard = self.defer_write_revs.write().await;
         write_guard.clear();
         for record in revision_records {
             write_guard.push(record.revision.rev_id);
@@ -102,21 +102,21 @@ impl RevisionMemoryCache {
         }
         drop(write_guard);
 
-        self.make_checkpoint().await;
+        self.tick_checkpoint().await;
     }
 
-    async fn make_checkpoint(&self) {
+    async fn tick_checkpoint(&self) {
         // https://github.com/async-graphql/async-graphql/blob/ed8449beec3d9c54b94da39bab33cec809903953/src/dataloader/mod.rs#L362
         if let Some(handler) = self.defer_save.write().await.take() {
             handler.abort();
         }
 
-        if self.pending_write_revs.read().await.is_empty() {
+        if self.defer_write_revs.read().await.is_empty() {
             return;
         }
 
         let rev_map = self.revs_map.clone();
-        let pending_write_revs = self.pending_write_revs.clone();
+        let pending_write_revs = self.defer_write_revs.clone();
         let delegate = self.delegate.clone();
 
         *self.defer_save.write().await = Some(tokio::spawn(async move {
@@ -128,7 +128,7 @@ impl RevisionMemoryCache {
             //
             // Use saturating_sub and split_off ?
             // https://stackoverflow.com/questions/28952411/what-is-the-idiomatic-way-to-pop-the-last-n-elements-in-a-mutable-vec
-            let mut save_records: Vec<RevisionRecord> = vec![];
+            let mut save_records: Vec<SyncRecord> = vec![];
             revs_write_guard.iter().for_each(|rev_id| match rev_map.get(rev_id) {
                 None => {}
                 Some(value) => {
@@ -136,7 +136,7 @@ impl RevisionMemoryCache {
                 }
             });
 
-            if delegate.checkpoint_tick(save_records).is_ok() {
+            if delegate.send_sync(save_records).is_ok() {
                 revs_write_guard.clear();
                 drop(revs_write_guard);
             }
diff --git a/frontend/rust-lib/flowy-revision/src/cache/reset.rs b/frontend/rust-lib/flowy-revision/src/cache/reset.rs
index bd128a9d9e..a1cb58a6bd 100644
--- a/frontend/rust-lib/flowy-revision/src/cache/reset.rs
+++ b/frontend/rust-lib/flowy-revision/src/cache/reset.rs
@@ -1,4 +1,4 @@
-use crate::disk::{RevisionDiskCache, RevisionRecord};
+use crate::disk::{RevisionDiskCache, SyncRecord};
 use crate::{RevisionLoader, RevisionPersistence};
 use bytes::Bytes;
 use flowy_error::{FlowyError, FlowyResult};
@@ -76,7 +76,7 @@ where
 
         let bytes = self.target.reset_data(revisions)?;
         let revision = Revision::initial_revision(&self.user_id, self.target.target_id(), bytes);
-        let record = RevisionRecord::new(revision);
+        let record = SyncRecord::new(revision);
 
         tracing::trace!("Reset {} revision record object", self.target.target_id());
         let _ = self
diff --git a/frontend/rust-lib/flowy-revision/src/conflict_resolve.rs b/frontend/rust-lib/flowy-revision/src/conflict_resolve.rs
index e48cb59407..4fb8260311 100644
--- a/frontend/rust-lib/flowy-revision/src/conflict_resolve.rs
+++ b/frontend/rust-lib/flowy-revision/src/conflict_resolve.rs
@@ -1,4 +1,4 @@
-use crate::RevisionManager;
+use crate::{RevisionMD5, RevisionManager};
 use bytes::Bytes;
 use flowy_error::{FlowyError, FlowyResult};
 use flowy_sync::entities::{
@@ -8,8 +8,6 @@ use flowy_sync::entities::{
 use lib_infra::future::BoxResultFuture;
 use std::{convert::TryFrom, sync::Arc};
 
-pub type OperationsMD5 = String;
-
 pub struct TransformOperations<Operations> {
     pub client_operations: Operations,
     pub server_operations: Option<Operations>,
@@ -28,12 +26,12 @@ pub trait ConflictResolver<Operations>
 where
     Operations: Send + Sync,
 {
-    fn compose_operations(&self, operations: Operations) -> BoxResultFuture<OperationsMD5, FlowyError>;
+    fn compose_operations(&self, operations: Operations) -> BoxResultFuture<RevisionMD5, FlowyError>;
     fn transform_operations(
         &self,
         operations: Operations,
     ) -> BoxResultFuture<TransformOperations<Operations>, FlowyError>;
-    fn reset_operations(&self, operations: Operations) -> BoxResultFuture<OperationsMD5, FlowyError>;
+    fn reset_operations(&self, operations: Operations) -> BoxResultFuture<RevisionMD5, FlowyError>;
 }
 
 pub trait ConflictRevisionSink: Send + Sync + 'static {
@@ -129,9 +127,8 @@ where
                 // The server_prime is None means the client local revisions conflict with the
                 // // server, and it needs to override the client delta.
                 let md5 = self.resolver.reset_operations(client_operations).await?;
-                let repeated_revision = RepeatedRevision::new(revisions);
-                assert_eq!(repeated_revision.last().unwrap().md5, md5);
-                let _ = self.rev_manager.reset_object(repeated_revision).await?;
+                debug_assert!(md5.is_equal(&revisions.last().unwrap().md5));
+                let _ = self.rev_manager.reset_object(revisions).await?;
                 Ok(None)
             }
             Some(server_operations) => {
@@ -158,7 +155,7 @@ fn make_client_and_server_revision<Operations, Connection>(
     rev_manager: &Arc<RevisionManager<Connection>>,
     client_operations: Operations,
     server_operations: Option<Operations>,
-    md5: String,
+    md5: RevisionMD5,
 ) -> (Revision, Option<Revision>)
 where
     Operations: OperationsSerializer,
diff --git a/frontend/rust-lib/flowy-revision/src/rev_manager.rs b/frontend/rust-lib/flowy-revision/src/rev_manager.rs
index 0b89de828f..49348ccc98 100644
--- a/frontend/rust-lib/flowy-revision/src/rev_manager.rs
+++ b/frontend/rust-lib/flowy-revision/src/rev_manager.rs
@@ -3,8 +3,8 @@ use crate::{RevisionPersistence, RevisionSnapshotDiskCache, RevisionSnapshotMana
 use bytes::Bytes;
 use flowy_error::{FlowyError, FlowyResult};
 use flowy_sync::{
-    entities::revision::{RepeatedRevision, Revision, RevisionRange},
-    util::{pair_rev_id_from_revisions, RevIdCounter},
+    entities::revision::{Revision, RevisionRange},
+    util::{md5, pair_rev_id_from_revisions, RevIdCounter},
 };
 use lib_infra::future::FutureResult;
 use std::sync::Arc;
@@ -143,9 +143,9 @@ impl<Connection: 'static> RevisionManager<Connection> {
     }
 
     #[tracing::instrument(level = "debug", skip(self, revisions), err)]
-    pub async fn reset_object(&self, revisions: RepeatedRevision) -> FlowyResult<()> {
+    pub async fn reset_object(&self, revisions: Vec<Revision>) -> FlowyResult<()> {
         let rev_id = pair_rev_id_from_revisions(&revisions).1;
-        let _ = self.rev_persistence.reset(revisions.into_inner()).await?;
+        let _ = self.rev_persistence.reset(revisions).await?;
         self.rev_id_counter.set(rev_id);
         Ok(())
     }
@@ -191,7 +191,7 @@ impl<Connection: 'static> RevisionManager<Connection> {
 
     pub fn next_rev_id_pair(&self) -> (i64, i64) {
         let cur = self.rev_id_counter.value();
-        let next = self.rev_id_counter.next();
+        let next = self.rev_id_counter.next_id();
         (cur, next)
     }
 
@@ -283,3 +283,56 @@ impl<Connection: 'static> RevisionLoader<Connection> {
         Ok(revisions)
     }
 }
+
+/// Represents as the md5 of the revision object after applying the
+/// revision. For example, RevisionMD5 will be the md5 of the document
+/// content.
+#[derive(Debug, Clone)]
+pub struct RevisionMD5(String);
+
+impl RevisionMD5 {
+    pub fn from_bytes<T: AsRef<[u8]>>(bytes: T) -> Result<Self, FlowyError> {
+        Ok(RevisionMD5(md5(bytes)))
+    }
+
+    pub fn into_inner(self) -> String {
+        self.0
+    }
+
+    pub fn is_equal(&self, s: &str) -> bool {
+        self.0 == s
+    }
+}
+
+impl std::convert::From<RevisionMD5> for String {
+    fn from(md5: RevisionMD5) -> Self {
+        md5.0
+    }
+}
+
+impl std::convert::From<&str> for RevisionMD5 {
+    fn from(s: &str) -> Self {
+        Self(s.to_owned())
+    }
+}
+impl std::convert::From<String> for RevisionMD5 {
+    fn from(s: String) -> Self {
+        Self(s)
+    }
+}
+
+impl std::ops::Deref for RevisionMD5 {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl PartialEq<Self> for RevisionMD5 {
+    fn eq(&self, other: &Self) -> bool {
+        self.0 == other.0
+    }
+}
+
+impl std::cmp::Eq for RevisionMD5 {}
diff --git a/frontend/rust-lib/flowy-revision/src/rev_persistence.rs b/frontend/rust-lib/flowy-revision/src/rev_persistence.rs
index 7a58cee1d8..e0c9529c1f 100644
--- a/frontend/rust-lib/flowy-revision/src/rev_persistence.rs
+++ b/frontend/rust-lib/flowy-revision/src/rev_persistence.rs
@@ -2,10 +2,9 @@ use crate::cache::{
     disk::{RevisionChangeset, RevisionDiskCache},
     memory::RevisionMemoryCacheDelegate,
 };
-use crate::disk::{RevisionRecord, RevisionState};
+use crate::disk::{RevisionState, SyncRecord};
 use crate::memory::RevisionMemoryCache;
 use crate::RevisionCompress;
-
 use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_sync::entities::revision::{Revision, RevisionRange};
 use std::collections::VecDeque;
@@ -20,10 +19,13 @@ pub struct RevisionPersistence<Connection> {
     object_id: String,
     disk_cache: Arc<dyn RevisionDiskCache<Connection, Error = FlowyError>>,
     memory_cache: Arc<RevisionMemoryCache>,
-    sync_seq: RwLock<RevisionSyncSequence>,
+    sync_seq: RwLock<DeferSyncSequence>,
 }
 
-impl<Connection: 'static> RevisionPersistence<Connection> {
+impl<Connection> RevisionPersistence<Connection>
+where
+    Connection: 'static,
+{
     pub fn new<C>(user_id: &str, object_id: &str, disk_cache: C) -> RevisionPersistence<Connection>
     where
         C: 'static + RevisionDiskCache<Connection, Error = FlowyError>,
@@ -39,7 +41,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
     ) -> RevisionPersistence<Connection> {
         let object_id = object_id.to_owned();
         let user_id = user_id.to_owned();
-        let sync_seq = RwLock::new(RevisionSyncSequence::new());
+        let sync_seq = RwLock::new(DeferSyncSequence::new());
         let memory_cache = Arc::new(RevisionMemoryCache::new(&object_id, Arc::new(disk_cache.clone())));
         Self {
             user_id,
@@ -131,7 +133,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
     pub(crate) async fn reset(&self, revisions: Vec<Revision>) -> FlowyResult<()> {
         let records = revisions
             .into_iter()
-            .map(|revision| RevisionRecord {
+            .map(|revision| SyncRecord {
                 revision,
                 state: RevisionState::Sync,
                 write_to_disk: false,
@@ -151,7 +153,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
             tracing::warn!("Duplicate revision: {}:{}-{:?}", self.object_id, revision.rev_id, state);
             return Ok(());
         }
-        let record = RevisionRecord {
+        let record = SyncRecord {
             revision,
             state,
             write_to_disk,
@@ -172,7 +174,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
         Ok(())
     }
 
-    pub async fn get(&self, rev_id: i64) -> Option<RevisionRecord> {
+    pub async fn get(&self, rev_id: i64) -> Option<SyncRecord> {
         match self.memory_cache.get(&rev_id).await {
             None => match self
                 .disk_cache
@@ -192,7 +194,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
         }
     }
 
-    pub fn batch_get(&self, doc_id: &str) -> FlowyResult<Vec<RevisionRecord>> {
+    pub fn batch_get(&self, doc_id: &str) -> FlowyResult<Vec<SyncRecord>> {
         self.disk_cache.read_revision_records(doc_id, None)
     }
 
@@ -225,7 +227,7 @@ impl<Connection: 'static> RevisionPersistence<Connection> {
 }
 
 impl<C> RevisionMemoryCacheDelegate for Arc<dyn RevisionDiskCache<C, Error = FlowyError>> {
-    fn checkpoint_tick(&self, mut records: Vec<RevisionRecord>) -> FlowyResult<()> {
+    fn send_sync(&self, mut records: Vec<SyncRecord>) -> FlowyResult<()> {
         records.retain(|record| record.write_to_disk);
         if !records.is_empty() {
             tracing::Span::current().record(
@@ -251,10 +253,10 @@ impl<C> RevisionMemoryCacheDelegate for Arc<dyn RevisionDiskCache<C, Error = Flo
 }
 
 #[derive(Default)]
-struct RevisionSyncSequence(VecDeque<i64>);
-impl RevisionSyncSequence {
+struct DeferSyncSequence(VecDeque<i64>);
+impl DeferSyncSequence {
     fn new() -> Self {
-        RevisionSyncSequence::default()
+        DeferSyncSequence::default()
     }
 
     fn add(&mut self, new_rev_id: i64) -> FlowyResult<()> {
diff --git a/frontend/rust-lib/flowy-revision/src/ws_manager.rs b/frontend/rust-lib/flowy-revision/src/ws_manager.rs
index eb7539c380..7413cf37d0 100644
--- a/frontend/rust-lib/flowy-revision/src/ws_manager.rs
+++ b/frontend/rust-lib/flowy-revision/src/ws_manager.rs
@@ -28,7 +28,7 @@ pub trait RevisionWSDataStream: Send + Sync {
 }
 
 // The sink provides the data that will be sent through the web socket to the
-// backend.
+// server.
 pub trait RevisionWebSocketSink: Send + Sync {
     fn next(&self) -> FutureResult<Option<ClientRevisionWSData>, FlowyError>;
 }
diff --git a/frontend/rust-lib/flowy-revision/tests/main.rs b/frontend/rust-lib/flowy-revision/tests/main.rs
new file mode 100644
index 0000000000..8b13789179
--- /dev/null
+++ b/frontend/rust-lib/flowy-revision/tests/main.rs
@@ -0,0 +1 @@
+
diff --git a/frontend/rust-lib/flowy-sdk/src/deps_resolve/folder_deps.rs b/frontend/rust-lib/flowy-sdk/src/deps_resolve/folder_deps.rs
index 4625bfa6bf..0320d078e9 100644
--- a/frontend/rust-lib/flowy-sdk/src/deps_resolve/folder_deps.rs
+++ b/frontend/rust-lib/flowy-sdk/src/deps_resolve/folder_deps.rs
@@ -18,7 +18,7 @@ use flowy_net::{
     http_server::folder::FolderHttpCloudService, local_server::LocalServer, ws::connection::FlowyWebSocketConnect,
 };
 use flowy_revision::{RevisionWebSocket, WSStateReceiver};
-use flowy_sync::entities::revision::{RepeatedRevision, Revision};
+use flowy_sync::entities::revision::Revision;
 use flowy_sync::entities::ws_data::ClientRevisionWSData;
 use flowy_user::services::UserSession;
 use futures_core::future::BoxFuture;
@@ -151,12 +151,12 @@ impl ViewDataProcessor for DocumentViewDataProcessor {
     ) -> FutureResult<(), FlowyError> {
         // Only accept Document type
         debug_assert_eq!(layout, ViewLayoutTypePB::Document);
-        let repeated_revision: RepeatedRevision = Revision::initial_revision(user_id, view_id, view_data).into();
+        let revision = Revision::initial_revision(user_id, view_id, view_data);
         let view_id = view_id.to_string();
         let manager = self.0.clone();
 
         FutureResult::new(async move {
-            let _ = manager.create_document(view_id, repeated_revision).await?;
+            let _ = manager.create_document(view_id, vec![revision]).await?;
             Ok(())
         })
     }
@@ -194,9 +194,8 @@ impl ViewDataProcessor for DocumentViewDataProcessor {
         let document_content = self.0.initial_document_content();
         FutureResult::new(async move {
             let delta_data = Bytes::from(document_content);
-            let repeated_revision: RepeatedRevision =
-                Revision::initial_revision(&user_id, &view_id, delta_data.clone()).into();
-            let _ = manager.create_document(view_id, repeated_revision).await?;
+            let revision = Revision::initial_revision(&user_id, &view_id, delta_data.clone());
+            let _ = manager.create_document(view_id, vec![revision]).await?;
             Ok(delta_data)
         })
     }
@@ -226,11 +225,11 @@ impl ViewDataProcessor for GridViewDataProcessor {
         _layout: ViewLayoutTypePB,
         delta_data: Bytes,
     ) -> FutureResult<(), FlowyError> {
-        let repeated_revision: RepeatedRevision = Revision::initial_revision(user_id, view_id, delta_data).into();
+        let revision = Revision::initial_revision(user_id, view_id, delta_data);
         let view_id = view_id.to_string();
         let grid_manager = self.0.clone();
         FutureResult::new(async move {
-            let _ = grid_manager.create_grid(view_id, repeated_revision).await?;
+            let _ = grid_manager.create_grid(view_id, vec![revision]).await?;
             Ok(())
         })
     }
diff --git a/shared-lib/flowy-sync/src/client_document/document_pad.rs b/shared-lib/flowy-sync/src/client_document/document_pad.rs
index be438dca25..ab8863c69b 100644
--- a/shared-lib/flowy-sync/src/client_document/document_pad.rs
+++ b/shared-lib/flowy-sync/src/client_document/document_pad.rs
@@ -1,3 +1,4 @@
+use crate::util::md5;
 use crate::{
     client_document::{
         history::{History, UndoResult},
@@ -77,9 +78,9 @@ impl ClientDocument {
         &self.operations
     }
 
-    pub fn md5(&self) -> String {
+    pub fn document_md5(&self) -> String {
         let bytes = self.to_bytes();
-        format!("{:x}", md5::compute(bytes))
+        md5(&bytes)
     }
 
     pub fn set_notify(&mut self, notify: mpsc::UnboundedSender<()>) {
diff --git a/shared-lib/flowy-sync/src/client_folder/folder_pad.rs b/shared-lib/flowy-sync/src/client_folder/folder_pad.rs
index e11d73963d..bb1dfb6902 100644
--- a/shared-lib/flowy-sync/src/client_folder/folder_pad.rs
+++ b/shared-lib/flowy-sync/src/client_folder/folder_pad.rs
@@ -1,9 +1,9 @@
 use crate::errors::internal_error;
 use crate::server_folder::{FolderOperations, FolderOperationsBuilder};
-use crate::util::cal_diff;
+use crate::util::{cal_diff, md5};
 use crate::{
     client_folder::builder::FolderPadBuilder,
-    entities::revision::{md5, Revision},
+    entities::revision::Revision,
     errors::{CollaborateError, CollaborateResult},
 };
 use flowy_folder_data_model::revision::{AppRevision, FolderRevision, TrashRevision, ViewRevision, WorkspaceRevision};
@@ -61,7 +61,7 @@ impl FolderPad {
         self.folder_rev = folder.folder_rev;
         self.operations = folder.operations;
 
-        Ok(self.md5())
+        Ok(self.folder_md5())
     }
 
     pub fn compose_remote_operations(&mut self, operations: FolderOperations) -> CollaborateResult<String> {
@@ -313,7 +313,7 @@ impl FolderPad {
         }
     }
 
-    pub fn md5(&self) -> String {
+    pub fn folder_md5(&self) -> String {
         md5(&self.operations.json_bytes())
     }
 
@@ -345,7 +345,7 @@ impl FolderPad {
                         self.operations = self.operations.compose(&operations)?;
                         Ok(Some(FolderChangeset {
                             operations,
-                            md5: self.md5(),
+                            md5: self.folder_md5(),
                         }))
                     }
                 }
@@ -383,7 +383,7 @@ impl FolderPad {
                         self.operations = self.operations.compose(&operations)?;
                         Ok(Some(FolderChangeset {
                             operations,
-                            md5: self.md5(),
+                            md5: self.folder_md5(),
                         }))
                     }
                 }
diff --git a/shared-lib/flowy-sync/src/client_grid/block_revision_pad.rs b/shared-lib/flowy-sync/src/client_grid/block_revision_pad.rs
index 36f65837c0..c5a504c358 100644
--- a/shared-lib/flowy-sync/src/client_grid/block_revision_pad.rs
+++ b/shared-lib/flowy-sync/src/client_grid/block_revision_pad.rs
@@ -1,6 +1,6 @@
-use crate::entities::revision::{md5, RepeatedRevision, Revision};
+use crate::entities::revision::{RepeatedRevision, Revision};
 use crate::errors::{CollaborateError, CollaborateResult};
-use crate::util::{cal_diff, make_operations_from_revisions};
+use crate::util::{cal_diff, make_operations_from_revisions, md5};
 use flowy_grid_data_model::revision::{
     gen_block_id, gen_row_id, CellRevision, GridBlockRevision, RowChangeset, RowRevision,
 };
diff --git a/shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs b/shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs
index f27c46d250..6f99a23e53 100644
--- a/shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs
+++ b/shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs
@@ -1,6 +1,6 @@
-use crate::entities::revision::{md5, RepeatedRevision, Revision};
+use crate::entities::revision::{RepeatedRevision, Revision};
 use crate::errors::{internal_error, CollaborateError, CollaborateResult};
-use crate::util::{cal_diff, make_operations_from_revisions};
+use crate::util::{cal_diff, make_operations_from_revisions, md5};
 
 use flowy_grid_data_model::revision::{
     gen_block_id, gen_grid_id, FieldRevision, FieldTypeRevision, GridBlockMetaRevision, GridBlockMetaRevisionChangeset,
@@ -315,7 +315,7 @@ impl GridRevisionPad {
         })
     }
 
-    pub fn md5(&self) -> String {
+    pub fn grid_md5(&self) -> String {
         md5(&self.operations.json_bytes())
     }
 
@@ -343,7 +343,7 @@ impl GridRevisionPad {
                         self.operations = self.operations.compose(&operations)?;
                         Ok(Some(GridRevisionChangeset {
                             operations,
-                            md5: self.md5(),
+                            md5: self.grid_md5(),
                         }))
                     }
                 }
diff --git a/shared-lib/flowy-sync/src/client_grid/view_revision_pad.rs b/shared-lib/flowy-sync/src/client_grid/view_revision_pad.rs
index 46e91734b4..04dd82d8ea 100644
--- a/shared-lib/flowy-sync/src/client_grid/view_revision_pad.rs
+++ b/shared-lib/flowy-sync/src/client_grid/view_revision_pad.rs
@@ -1,6 +1,6 @@
-use crate::entities::revision::{md5, Revision};
+use crate::entities::revision::Revision;
 use crate::errors::{internal_error, CollaborateError, CollaborateResult};
-use crate::util::{cal_diff, make_operations_from_revisions};
+use crate::util::{cal_diff, make_operations_from_revisions, md5};
 use flowy_grid_data_model::revision::{
     FieldRevision, FieldTypeRevision, FilterConfigurationRevision, FilterConfigurationsByFieldId, GridViewRevision,
     GroupConfigurationRevision, GroupConfigurationsByFieldId, LayoutRevision,
diff --git a/shared-lib/flowy-sync/src/entities/revision.rs b/shared-lib/flowy-sync/src/entities/revision.rs
index 39fb71a2e6..950e8956db 100644
--- a/shared-lib/flowy-sync/src/entities/revision.rs
+++ b/shared-lib/flowy-sync/src/entities/revision.rs
@@ -1,3 +1,4 @@
+use crate::util::md5;
 use bytes::Bytes;
 use flowy_derive::{ProtoBuf, ProtoBuf_Enum};
 use std::{convert::TryFrom, fmt::Formatter, ops::RangeInclusive};
@@ -36,6 +37,34 @@ impl std::convert::From<Vec<u8>> for Revision {
 }
 
 impl Revision {
+    pub fn new<T: Into<String>>(
+        object_id: &str,
+        base_rev_id: i64,
+        rev_id: i64,
+        bytes: Bytes,
+        user_id: &str,
+        md5: T,
+    ) -> Revision {
+        let user_id = user_id.to_owned();
+        let object_id = object_id.to_owned();
+        let bytes = bytes.to_vec();
+        let base_rev_id = base_rev_id;
+        let rev_id = rev_id;
+
+        if base_rev_id != 0 {
+            debug_assert!(base_rev_id != rev_id);
+        }
+
+        Self {
+            base_rev_id,
+            rev_id,
+            bytes,
+            md5: md5.into(),
+            object_id,
+            ty: RevType::DeprecatedLocal,
+            user_id,
+        }
+    }
     pub fn is_empty(&self) -> bool {
         self.base_rev_id == self.rev_id
     }
@@ -52,28 +81,6 @@ impl Revision {
         let md5 = md5(&bytes);
         Self::new(object_id, 0, 0, bytes, user_id, md5)
     }
-
-    pub fn new(object_id: &str, base_rev_id: i64, rev_id: i64, bytes: Bytes, user_id: &str, md5: String) -> Revision {
-        let user_id = user_id.to_owned();
-        let object_id = object_id.to_owned();
-        let bytes = bytes.to_vec();
-        let base_rev_id = base_rev_id;
-        let rev_id = rev_id;
-
-        if base_rev_id != 0 {
-            debug_assert!(base_rev_id != rev_id);
-        }
-
-        Self {
-            base_rev_id,
-            rev_id,
-            bytes,
-            md5,
-            object_id,
-            ty: RevType::DeprecatedLocal,
-            user_id,
-        }
-    }
 }
 
 impl std::fmt::Debug for Revision {
@@ -209,12 +216,6 @@ impl RevisionRange {
     }
 }
 
-#[inline]
-pub fn md5<T: AsRef<[u8]>>(data: T) -> String {
-    let md5 = format!("{:x}", md5::compute(data));
-    md5
-}
-
 #[derive(Debug, ProtoBuf_Enum, Clone, Eq, PartialEq)]
 pub enum RevType {
     DeprecatedLocal = 0,
diff --git a/shared-lib/flowy-sync/src/util.rs b/shared-lib/flowy-sync/src/util.rs
index 10e977919f..31c4147e60 100644
--- a/shared-lib/flowy-sync/src/util.rs
+++ b/shared-lib/flowy-sync/src/util.rs
@@ -49,7 +49,8 @@ impl RevIdCounter {
     pub fn new(n: i64) -> Self {
         Self(AtomicI64::new(n))
     }
-    pub fn next(&self) -> i64 {
+
+    pub fn next_id(&self) -> i64 {
         let _ = self.0.fetch_add(1, SeqCst);
         self.value()
     }
diff --git a/shared-lib/lib-ot/src/core/node_tree/tree.rs b/shared-lib/lib-ot/src/core/node_tree/tree.rs
index dfd0a5f77f..16399211ea 100644
--- a/shared-lib/lib-ot/src/core/node_tree/tree.rs
+++ b/shared-lib/lib-ot/src/core/node_tree/tree.rs
@@ -35,9 +35,19 @@ impl NodeTree {
         Ok(tree)
     }
 
-    pub fn from_bytes(bytes: Vec<u8>, context: NodeTreeContext) -> Result<Self, OTError> {
-        let operations = NodeOperations::from_bytes(bytes)?;
-        Self::from_operations(operations, context)
+    pub fn from_bytes(bytes: &[u8]) -> Result<Self, OTError> {
+        let tree: NodeTree = serde_json::from_slice(bytes).map_err(|e| OTError::serde().context(e))?;
+        Ok(tree)
+    }
+
+    pub fn to_bytes(&self) -> Vec<u8> {
+        match serde_json::to_vec(self) {
+            Ok(bytes) => bytes,
+            Err(e) => {
+                tracing::error!("{}", e);
+                vec![]
+            }
+        }
     }
 
     pub fn from_operations<T: Into<NodeOperations>>(operations: T, context: NodeTreeContext) -> Result<Self, OTError> {
diff --git a/shared-lib/lib-ot/tests/node/serde_test.rs b/shared-lib/lib-ot/tests/node/serde_test.rs
index 25e086c160..6851cd4164 100644
--- a/shared-lib/lib-ot/tests/node/serde_test.rs
+++ b/shared-lib/lib-ot/tests/node/serde_test.rs
@@ -1,4 +1,6 @@
-use lib_ot::core::{AttributeBuilder, Changeset, NodeData, NodeDataBuilder, NodeOperation, NodeTree, Path};
+use lib_ot::core::{
+    AttributeBuilder, Changeset, NodeData, NodeDataBuilder, NodeOperation, NodeTree, NodeTreeContext, Path,
+};
 use lib_ot::text_delta::DeltaTextOperationBuilder;
 
 #[test]
@@ -26,6 +28,7 @@ fn operation_insert_node_with_children_serde_test() {
         r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text","children":[{"type":"sub_text"}]}]}"#
     );
 }
+
 #[test]
 fn operation_update_node_attributes_serde_test() {
     let operation = NodeOperation::Update {
@@ -102,6 +105,14 @@ fn node_tree_serialize_test() {
     assert_eq!(json, TREE_JSON);
 }
 
+#[test]
+fn node_tree_serde_test() {
+    let tree: NodeTree = serde_json::from_str(TREE_JSON).unwrap();
+    let bytes = tree.to_bytes();
+    let tree = NodeTree::from_bytes(&bytes).unwrap();
+    assert_eq!(bytes, tree.to_bytes());
+}
+
 #[allow(dead_code)]
 const TREE_JSON: &str = r#"{
   "type": "editor",