diff --git a/node/rpc/src/zgs/api.rs b/node/rpc/src/zgs/api.rs
index 7a55db2..9cc07e8 100644
--- a/node/rpc/src/zgs/api.rs
+++ b/node/rpc/src/zgs/api.rs
@@ -12,9 +12,23 @@ pub trait Rpc {
     #[method(name = "uploadSegment")]
     async fn upload_segment(&self, segment: SegmentWithProof) -> RpcResult<()>;
 
+    #[method(name = "uploadSegmentByTxSeq")]
+    async fn upload_segment_by_tx_seq(
+        &self,
+        segment: SegmentWithProof,
+        tx_seq: u64,
+    ) -> RpcResult<()>;
+
     #[method(name = "uploadSegments")]
     async fn upload_segments(&self, segments: Vec<SegmentWithProof>) -> RpcResult<()>;
 
+    #[method(name = "uploadSegmentsByTxSeq")]
+    async fn upload_segments_by_tx_seq(
+        &self,
+        segments: Vec<SegmentWithProof>,
+        tx_seq: u64,
+    ) -> RpcResult<()>;
+
     #[method(name = "downloadSegment")]
     async fn download_segment(
         &self,
@@ -23,6 +37,14 @@ pub trait Rpc {
         end_index: usize,
     ) -> RpcResult<Option<Segment>>;
 
+    #[method(name = "downloadSegmentByTxSeq")]
+    async fn download_segment_by_tx_seq(
+        &self,
+        tx_seq: u64,
+        start_index: usize,
+        end_index: usize,
+    ) -> RpcResult<Option<Segment>>;
+
     #[method(name = "downloadSegmentWithProof")]
     async fn download_segment_with_proof(
         &self,
@@ -30,6 +52,13 @@ pub trait Rpc {
         index: usize,
     ) -> RpcResult<Option<SegmentWithProof>>;
 
+    #[method(name = "downloadSegmentWithProofByTxSeq")]
+    async fn download_segment_with_proof_by_tx_seq(
+        &self,
+        tx_seq: u64,
+        index: usize,
+    ) -> RpcResult<Option<SegmentWithProof>>;
+
     #[method(name = "checkFileFinalized")]
     async fn check_file_finalized(&self, tx_seq_or_root: TxSeqOrRoot) -> RpcResult<Option<bool>>;
 
diff --git a/node/rpc/src/zgs/impl.rs b/node/rpc/src/zgs/impl.rs
index 4ec17d3..4c1e0f1 100644
--- a/node/rpc/src/zgs/impl.rs
+++ b/node/rpc/src/zgs/impl.rs
@@ -42,6 +42,16 @@ impl RpcServer for RpcServerImpl {
         self.put_segment(segment).await
     }
 
+    async fn upload_segment_by_tx_seq(
+        &self,
+        segment: SegmentWithProof,
+        tx_seq: u64,
+    ) -> RpcResult<()> {
+        info!(tx_seq = %tx_seq, index = %segment.index, "zgs_uploadSegmentByTxSeq");
+        let maybe_tx = self.ctx.log_store.get_tx_by_seq_number(tx_seq).await?;
+        self.put_segment_with_maybe_tx(segment, maybe_tx).await
+    }
+
     async fn upload_segments(&self, segments: Vec<SegmentWithProof>) -> RpcResult<()> {
         let root = match segments.first() {
             None => return Ok(()),
@@ -57,6 +67,23 @@ impl RpcServer for RpcServerImpl {
         Ok(())
     }
 
+    async fn upload_segments_by_tx_seq(
+        &self,
+        segments: Vec<SegmentWithProof>,
+        tx_seq: u64,
+    ) -> RpcResult<()> {
+        let indices = SegmentIndexArray::new(&segments);
+        info!(%tx_seq, ?indices, "zgs_uploadSegmentsByTxSeq");
+
+        let maybe_tx = self.ctx.log_store.get_tx_by_seq_number(tx_seq).await?;
+        for segment in segments.into_iter() {
+            self.put_segment_with_maybe_tx(segment, maybe_tx.clone())
+                .await?;
+        }
+
+        Ok(())
+    }
+
     async fn download_segment(
         &self,
         data_root: DataRoot,
@@ -65,34 +92,26 @@ impl RpcServer for RpcServerImpl {
     ) -> RpcResult<Option<Segment>> {
         info!(%data_root, %start_index, %end_index, "zgs_downloadSegment");
 
-        if start_index >= end_index {
-            return Err(error::invalid_params("end_index", "invalid chunk index"));
-        }
-
-        if end_index - start_index > self.ctx.config.chunks_per_segment {
-            return Err(error::invalid_params(
-                "end_index",
-                format!(
-                    "exceeds maximum chunks {}",
-                    self.ctx.config.chunks_per_segment
-                ),
-            ));
-        }
-
         let tx_seq = try_option!(
             self.ctx
                 .log_store
                 .get_tx_seq_by_data_root(&data_root)
                 .await?
         );
-        let segment = try_option!(
-            self.ctx
-                .log_store
-                .get_chunks_by_tx_and_index_range(tx_seq, start_index, end_index)
-                .await?
-        );
 
-        Ok(Some(Segment(segment.data)))
+        self.get_segment_by_tx_seq(tx_seq, start_index, end_index)
+            .await
+    }
+
+    async fn download_segment_by_tx_seq(
+        &self,
+        tx_seq: u64,
+        start_index: usize,
+        end_index: usize,
+    ) -> RpcResult<Option<Segment>> {
+        info!(%tx_seq, %start_index, %end_index, "zgs_downloadSegmentByTxSeq");
+        self.get_segment_by_tx_seq(tx_seq, start_index, end_index)
+            .await
     }
 
     async fn download_segment_with_proof(
@@ -104,40 +123,19 @@ impl RpcServer for RpcServerImpl {
 
         let tx = try_option!(self.ctx.log_store.get_tx_by_data_root(&data_root).await?);
 
-        // validate index
-        let chunks_per_segment = self.ctx.config.chunks_per_segment;
-        let (num_segments, last_segment_size) =
-            SegmentWithProof::split_file_into_segments(tx.size as usize, chunks_per_segment)?;
+        self.get_segment_with_proof_by_tx(tx, index).await
+    }
 
-        if index >= num_segments {
-            return Err(error::invalid_params("index", "index out of bound"));
-        }
+    async fn download_segment_with_proof_by_tx_seq(
+        &self,
+        tx_seq: u64,
+        index: usize,
+    ) -> RpcResult<Option<SegmentWithProof>> {
+        info!(%tx_seq, %index, "zgs_downloadSegmentWithProofByTxSeq");
 
-        // calculate chunk start and end index
-        let start_index = index * chunks_per_segment;
-        let end_index = if index == num_segments - 1 {
-            // last segment without padding chunks by flow
-            start_index + last_segment_size / CHUNK_SIZE
-        } else {
-            start_index + chunks_per_segment
-        };
+        let tx = try_option!(self.ctx.log_store.get_tx_by_seq_number(tx_seq).await?);
 
-        let segment = try_option!(
-            self.ctx
-                .log_store
-                .get_chunks_with_proof_by_tx_and_index_range(tx.seq, start_index, end_index, None)
-                .await?
-        );
-
-        let proof = tx.compute_segment_proof(&segment, chunks_per_segment)?;
-
-        Ok(Some(SegmentWithProof {
-            root: data_root,
-            data: segment.chunks.data,
-            index,
-            proof,
-            file_size: tx.size as usize,
-        }))
+        self.get_segment_with_proof_by_tx(tx, index).await
     }
 
     async fn check_file_finalized(&self, tx_seq_or_root: TxSeqOrRoot) -> RpcResult<Option<bool>> {
@@ -277,15 +275,29 @@ impl RpcServerImpl {
     async fn put_segment(&self, segment: SegmentWithProof) -> RpcResult<()> {
         debug!(root = %segment.root, index = %segment.index, "putSegment");
 
-        self.ctx.chunk_pool.validate_segment_size(&segment.data)?;
-
         let maybe_tx = self
             .ctx
             .log_store
             .get_tx_by_data_root(&segment.root)
             .await?;
-        let mut need_cache = false;
 
+        self.put_segment_with_maybe_tx(segment, maybe_tx).await
+    }
+
+    async fn put_segment_with_maybe_tx(
+        &self,
+        segment: SegmentWithProof,
+        maybe_tx: Option<Transaction>,
+    ) -> RpcResult<()> {
+        self.ctx.chunk_pool.validate_segment_size(&segment.data)?;
+
+        if let Some(tx) = &maybe_tx {
+            if tx.data_merkle_root != segment.root {
+                return Err(error::internal_error("data root and tx seq not match"));
+            }
+        }
+
+        let mut need_cache = false;
         if self
             .ctx
             .chunk_pool
@@ -323,6 +335,77 @@ impl RpcServerImpl {
         }
         Ok(())
     }
+
+    async fn get_segment_by_tx_seq(
+        &self,
+        tx_seq: u64,
+        start_index: usize,
+        end_index: usize,
+    ) -> RpcResult<Option<Segment>> {
+        if start_index >= end_index {
+            return Err(error::invalid_params("end_index", "invalid chunk index"));
+        }
+
+        if end_index - start_index > self.ctx.config.chunks_per_segment {
+            return Err(error::invalid_params(
+                "end_index",
+                format!(
+                    "exceeds maximum chunks {}",
+                    self.ctx.config.chunks_per_segment
+                ),
+            ));
+        }
+
+        let segment = try_option!(
+            self.ctx
+                .log_store
+                .get_chunks_by_tx_and_index_range(tx_seq, start_index, end_index)
+                .await?
+        );
+
+        Ok(Some(Segment(segment.data)))
+    }
+
+    async fn get_segment_with_proof_by_tx(
+        &self,
+        tx: Transaction,
+        index: usize,
+    ) -> RpcResult<Option<SegmentWithProof>> {
+        // validate index
+        let chunks_per_segment = self.ctx.config.chunks_per_segment;
+        let (num_segments, last_segment_size) =
+            SegmentWithProof::split_file_into_segments(tx.size as usize, chunks_per_segment)?;
+
+        if index >= num_segments {
+            return Err(error::invalid_params("index", "index out of bound"));
+        }
+
+        // calculate chunk start and end index
+        let start_index = index * chunks_per_segment;
+        let end_index = if index == num_segments - 1 {
+            // last segment without padding chunks by flow
+            start_index + last_segment_size / CHUNK_SIZE
+        } else {
+            start_index + chunks_per_segment
+        };
+
+        let segment = try_option!(
+            self.ctx
+                .log_store
+                .get_chunks_with_proof_by_tx_and_index_range(tx.seq, start_index, end_index, None)
+                .await?
+        );
+
+        let proof = tx.compute_segment_proof(&segment, chunks_per_segment)?;
+
+        Ok(Some(SegmentWithProof {
+            root: tx.data_merkle_root,
+            data: segment.chunks.data,
+            index,
+            proof,
+            file_size: tx.size as usize,
+        }))
+    }
 }
 
 enum SegmentIndex {