diff --git a/storage/src/db_storage/mod.rs b/storage/src/db_storage/mod.rs
index 10650db9f9..97d2a87ad5 100644
--- a/storage/src/db_storage/mod.rs
+++ b/storage/src/db_storage/mod.rs
@@ -51,7 +51,7 @@ impl DBStorage {
             let mut remove_cf_vec = Vec::new();
             db_cfs_set.iter().for_each(|k| {
                 if !cfs_set.contains(&k.as_str()) {
-                    remove_cf_vec.push(k.clone());
+                    remove_cf_vec.push(<&std::string::String>::clone(k));
                 }
             });
             ensure!(
diff --git a/sync/src/tasks/block_sync_task.rs b/sync/src/tasks/block_sync_task.rs
index 2d666612d1..6f08bf56f1 100644
--- a/sync/src/tasks/block_sync_task.rs
+++ b/sync/src/tasks/block_sync_task.rs
@@ -205,15 +205,15 @@ impl BlockCollector {
 
     fn apply_block(&mut self, block: Block, peer_id: Option<PeerId>) -> Result<()> {
         if let Err(err) = self.chain.apply(block.clone()) {
-            return match err.downcast::<ConnectBlockError>() {
+            match err.downcast::<ConnectBlockError>() {
                 Ok(e) => {
                     self.chain
                         .get_storage()
                         .save_failed_block(block.id(), block, peer_id)?;
                     Err(e.into())
                 }
-                Err(e) => Err(e.into()),
-            };
+                Err(e) => Err(e),
+            }
         } else {
             Ok(())
         }
@@ -297,16 +297,14 @@ mod tests {
             block_ids: Vec<HashValue>,
         ) -> BoxFuture<Result<Vec<(Block, Option<PeerId>)>>> {
             let blocks = self.blocks.lock().unwrap();
-            let result: Result<Vec<Block>> = block_ids
+            let result: Result<Vec<(Block, Option<PeerId>)>> = block_ids
                 .iter()
                 .map(|block_id| {
-                    (
-                        blocks
-                            .get(block_id)
-                            .cloned()
-                            .ok_or_else(|| format_err!("Can not find block by id: {:?}", block_id)),
-                        None,
-                    )
+                    if let Some(block) = blocks.get(block_id).cloned() {
+                        Ok((block, None))
+                    } else {
+                        Err(format_err!("Can not find block by id: {:?}", block_id))
+                    }
                 })
                 .collect();
             async {
@@ -386,9 +384,9 @@ mod tests {
         let result = sync_task.await?;
         let last_block_number = result
             .iter()
-            .map(|(block, block_info)| {
-                assert!(block_info.is_none());
-                block.header().number as i64
+            .map(|block_data| {
+                assert!(block_data.info.is_none());
+                block_data.block.header().number as i64
             })
             .fold(-1, |parent, current| {
                 //ensure return block is ordered
@@ -430,13 +428,13 @@ mod tests {
         let result = sync_task.await?;
         let last_block_number = result
             .iter()
-            .map(|(block, block_info)| {
-                if block.header().number() % 2 == 0 {
-                    assert!(block_info.is_some())
+            .map(|block_data| {
+                if block_data.block.header().number() % 2 == 0 {
+                    assert!(block_data.info.is_some())
                 } else {
-                    assert!(block_info.is_none())
+                    assert!(block_data.info.is_none())
                 }
-                block.header().number as i64
+                block_data.block.header().number as i64
             })
             .fold(-1, |parent, current| {
                 //ensure return block is ordered
diff --git a/sync/src/tasks/mock.rs b/sync/src/tasks/mock.rs
index 0cac6893a5..3a051ca55e 100644
--- a/sync/src/tasks/mock.rs
+++ b/sync/src/tasks/mock.rs
@@ -142,15 +142,14 @@ impl BlockFetcher for SyncNodeMocker {
         &self,
         block_ids: Vec<HashValue>,
     ) -> BoxFuture<'_, Result<Vec<(Block, Option<PeerId>)>>> {
-        let result: Result<Vec<Block>> = block_ids
+        let result: Result<Vec<(Block, Option<PeerId>)>> = block_ids
             .into_iter()
             .map(|block_id| {
-                (
-                    self.chain()
-                        .get_block(block_id)?
-                        .ok_or_else(|| format_err!("Can not find block by id: {}", block_id)),
-                    None,
-                )
+                if let Some(block) = self.chain().get_block(block_id)? {
+                    Ok((block, None))
+                } else {
+                    Err(format_err!("Can not find block by id: {}", block_id))
+                }
             })
             .collect();
         async move {
diff --git a/sync/src/tasks/tests.rs b/sync/src/tasks/tests.rs
index a853728a0c..e742ba65e9 100644
--- a/sync/src/tasks/tests.rs
+++ b/sync/src/tasks/tests.rs
@@ -11,6 +11,7 @@ use pin_utils::core_reexport::time::Duration;
 use starcoin_chain_api::ChainReader;
 use starcoin_chain_mock::BlockChain;
 use starcoin_genesis::Genesis;
+use starcoin_storage::block_info::BlockInfoStore;
 use starcoin_storage::BlockStore;
 use starcoin_types::block::{Block, BlockBody, BlockHeader};
 use starcoin_vm_types::genesis_config::{BuiltinNetworkID, ChainNetwork};
@@ -86,15 +87,16 @@ pub async fn test_failed_block() -> Result<()> {
     let net = ChainNetwork::new_builtin(BuiltinNetworkID::Halley);
     let (storage, startup_info, _) = Genesis::init_storage_for_test(&net)?;
 
+    let block_info = storage.get_block_info(startup_info.main)?.unwrap();
     let chain = BlockChain::new(net.time_service(), startup_info.main, storage.clone())?;
     let (sender, _) = unbounded();
-    let mut block_collector = BlockCollector::new_with_handle(chain, sender);
+    let mut block_collector = BlockCollector::new_with_handle(block_info, chain, sender);
     let mut header = BlockHeader::random();
     header.number = 1;
     let body = BlockBody::new(Vec::new(), None);
     let failed_block = Block::new(header, body);
     let failed_block_id = failed_block.id();
-    if let Err(_) = block_collector.apply_block_for_test(failed_block) {
+    if block_collector.apply_block_for_test(failed_block).is_err() {
         assert!(storage.get_failed_block_by_id(failed_block_id)?.is_some());
         Ok(())
     } else {