diff --git a/services/backup/src/service/handlers/send_log.rs b/services/backup/src/service/handlers/send_log.rs
new file mode 100644
index 000000000..c10205baf
--- /dev/null
+++ b/services/backup/src/service/handlers/send_log.rs
@@ -0,0 +1,80 @@
+use tonic::Status;
+use uuid::Uuid;
+
+use crate::{
+  blob::PutClient, constants::ID_SEPARATOR, database::DatabaseClient,
+  service::proto::SendLogResponse,
+};
+
+enum LogPersistence {
+  /// Log entirely stored in DynamoDB database
+  DB,
+  /// Log contents stored with Blob service
+  BLOB { holder: String },
+}
+
+pub struct SendLogHandler {
+  // flow control
+  pub should_close_stream: bool,
+
+  // inputs
+  user_id: Option<String>,
+  backup_id: Option<String>,
+  log_hash: Option<String>,
+
+  // internal state
+  log_id: Option<String>,
+  log_buffer: Vec<u8>,
+  persistence_method: LogPersistence,
+  should_receive_data: bool,
+
+  // client instances
+  db: DatabaseClient,
+  blob_client: Option<PutClient>,
+}
+
+impl SendLogHandler {
+  pub fn new(db: &DatabaseClient) -> Self {
+    SendLogHandler {
+      db: db.clone(),
+      blob_client: None,
+      user_id: None,
+      backup_id: None,
+      log_hash: None,
+      log_id: None,
+      log_buffer: Vec::new(),
+      persistence_method: LogPersistence::DB,
+      should_receive_data: false,
+      should_close_stream: false,
+    }
+  }
+
+  pub async fn handle_user_id(
+    &mut self,
+    user_id: String,
+  ) -> Result<(), Status> {
+    unimplemented!()
+  }
+  pub async fn handle_backup_id(
+    &mut self,
+    backup_id: String,
+  ) -> Result<(), Status> {
+    unimplemented!()
+  }
+  pub async fn handle_log_hash(
+    &mut self,
+    log_hash: Vec<u8>,
+  ) -> Result<(), Status> {
+    unimplemented!()
+  }
+  pub async fn handle_log_data(
+    &mut self,
+    data_chunk: Vec<u8>,
+  ) -> Result<(), Status> {
+    unimplemented!()
+  }
+
+  pub async fn finish(self) -> Result<SendLogResponse, Status> {
+    unimplemented!()
+  }
+}
diff --git a/services/backup/src/service/mod.rs b/services/backup/src/service/mod.rs
index b8eeada36..326531bf7 100644
--- a/services/backup/src/service/mod.rs
+++ b/services/backup/src/service/mod.rs
@@ -1,184 +1,224 @@
 use aws_sdk_dynamodb::Error as DynamoDBError;
 use proto::backup_service_server::BackupService;
 use std::pin::Pin;
 use tokio::sync::mpsc;
 use tokio_stream::{wrappers::ReceiverStream, Stream, StreamExt};
 use tonic::{Request, Response, Status};
 use tracing::{debug, error, info, instrument, trace, warn, Instrument};
 
 use crate::{
   constants::MPSC_CHANNEL_BUFFER_CAPACITY,
   database::{DatabaseClient, Error as DBError},
 };
 
 mod proto {
   tonic::include_proto!("backup");
 }
 pub use proto::backup_service_server::BackupServiceServer;
 
 /// submodule containing gRPC endpoint handler implementations
 mod handlers {
   pub(super) mod add_attachments;
   pub(super) mod create_backup;
+  pub(super) mod send_log;
 
   // re-exports for convenient usage in handlers
   pub(self) use super::handle_db_error;
   pub(self) use super::proto;
 }
 use self::handlers::create_backup::CreateBackupHandler;
+use self::handlers::send_log::SendLogHandler;
 
 pub struct MyBackupService {
   db: DatabaseClient,
 }
 
 impl MyBackupService {
   pub fn new(db_client: DatabaseClient) -> Self {
     MyBackupService { db: db_client }
   }
 }
 
 // gRPC implementation
 #[tonic::async_trait]
 impl BackupService for MyBackupService {
   type CreateNewBackupStream = Pin<
     Box<
       dyn Stream<Item = Result<proto::CreateNewBackupResponse, Status>> + Send,
     >,
   >;
 
   #[instrument(skip_all, fields(device_id, data_hash, backup_id, blob_holder))]
   async fn create_new_backup(
     &self,
     request: Request<tonic::Streaming<proto::CreateNewBackupRequest>>,
   ) -> Result<Response<Self::CreateNewBackupStream>, Status> {
     use proto::create_new_backup_request::Data::*;
 
     info!("CreateNewBackup request: {:?}", request);
     let mut in_stream = request.into_inner();
     let (tx, rx) = mpsc::channel(MPSC_CHANNEL_BUFFER_CAPACITY);
     let db = self.db.clone();
     let worker = async move {
       let mut handler = CreateBackupHandler::new(&db);
       while let Some(message) = in_stream.next().await {
         let response = match message {
           Ok(proto::CreateNewBackupRequest {
             data: Some(UserId(user_id)),
           }) => handler.handle_user_id(user_id).await,
           Ok(proto::CreateNewBackupRequest {
             data: Some(DeviceId(device_id)),
           }) => handler.handle_device_id(device_id).await,
           Ok(proto::CreateNewBackupRequest {
             data: Some(KeyEntropy(key_entropy)),
           }) => handler.handle_key_entropy(key_entropy).await,
           Ok(proto::CreateNewBackupRequest {
             data: Some(NewCompactionHash(hash)),
           }) => handler.handle_data_hash(hash).await,
           Ok(proto::CreateNewBackupRequest {
             data: Some(NewCompactionChunk(chunk)),
           }) => handler.handle_data_chunk(chunk).await,
           unexpected => {
             error!("Received an unexpected request: {:?}", unexpected);
             Err(Status::unknown("unknown error"))
           }
         };
 
         trace!("Sending response: {:?}", response);
         if let Err(e) = tx.send(response).await {
           error!("Response was dropped: {}", e);
           break;
         }
         if handler.should_close_stream {
           trace!("Handler requested to close stream");
           break;
         }
       }
       if let Err(status) = handler.finish().await {
         trace!("Sending error response: {:?}", status);
         let _ = tx.send(Err(status)).await;
       }
       debug!("Request finished processing");
     };
     tokio::spawn(worker.in_current_span());
 
     let out_stream = ReceiverStream::new(rx);
     Ok(Response::new(
       Box::pin(out_stream) as Self::CreateNewBackupStream
     ))
   }
 
-  #[instrument(skip(self))]
+  #[instrument(skip_all, fields(backup_id, log_hash, log_id))]
   async fn send_log(
     &self,
-    _request: Request<tonic::Streaming<proto::SendLogRequest>>,
+    request: Request<tonic::Streaming<proto::SendLogRequest>>,
   ) -> Result<Response<proto::SendLogResponse>, Status> {
-    Err(Status::unimplemented("unimplemented"))
+    use proto::send_log_request::Data::*;
+
+    info!("SendLog request: {:?}", request);
+    let mut handler = SendLogHandler::new(&self.db);
+
+    let mut in_stream = request.into_inner();
+    while let Some(message) = in_stream.next().await {
+      let result = match message {
+        Ok(proto::SendLogRequest {
+          data: Some(UserId(user_id)),
+        }) => handler.handle_user_id(user_id).await,
+        Ok(proto::SendLogRequest {
+          data: Some(BackupId(backup_id)),
+        }) => handler.handle_backup_id(backup_id).await,
+        Ok(proto::SendLogRequest {
+          data: Some(LogHash(log_hash)),
+        }) => handler.handle_log_hash(log_hash).await,
+        Ok(proto::SendLogRequest {
+          data: Some(LogData(chunk)),
+        }) => handler.handle_log_data(chunk).await,
+        unexpected => {
+          error!("Received an unexpected request: {:?}", unexpected);
+          Err(Status::unknown("unknown error"))
+        }
+      };
+
+      if let Err(err) = result {
+        error!("An error occurred when processing request: {:?}", err);
+        return Err(err);
+      }
+      if handler.should_close_stream {
+        trace!("Handler requested to close request stream");
+        break;
+      }
+    }
+
+    let response = handler.finish().await;
+    debug!("Finished. Sending response: {:?}", response);
+    response.map(|response_body| Response::new(response_body))
   }
 
   type RecoverBackupKeyStream = Pin<
     Box<
       dyn Stream<Item = Result<proto::RecoverBackupKeyResponse, Status>> + Send,
     >,
   >;
 
   #[instrument(skip(self))]
   async fn recover_backup_key(
     &self,
     _request: Request<tonic::Streaming<proto::RecoverBackupKeyRequest>>,
   ) -> Result<Response<Self::RecoverBackupKeyStream>, Status> {
     Err(Status::unimplemented("unimplemented"))
   }
 
   type PullBackupStream = Pin<
     Box<dyn Stream<Item = Result<proto::PullBackupResponse, Status>> + Send>,
   >;
 
   #[instrument(skip(self))]
   async fn pull_backup(
     &self,
     _request: Request<proto::PullBackupRequest>,
   ) -> Result<Response<Self::PullBackupStream>, Status> {
     Err(Status::unimplemented("unimplemented"))
   }
 
   #[instrument(skip_all,
     fields(
       backup_id = &request.get_ref().backup_id,
       log_id = &request.get_ref().log_id)
     )]
   async fn add_attachments(
     &self,
     request: Request<proto::AddAttachmentsRequest>,
   ) -> Result<Response<()>, Status> {
     info!(
       "AddAttachment request. New holders: {}",
       &request.get_ref().holders
     );
 
     handlers::add_attachments::handle_add_attachments(
       &self.db,
       request.into_inner(),
     )
     .await?;
 
     info!("Request processed successfully");
     Ok(Response::new(()))
   }
 }
 
 /// A helper converting our Database errors into gRPC responses
 fn handle_db_error(db_error: DBError) -> Status {
   match db_error {
     DBError::AwsSdk(DynamoDBError::InternalServerError(_))
     | DBError::AwsSdk(DynamoDBError::ProvisionedThroughputExceededException(
       _,
     ))
     | DBError::AwsSdk(DynamoDBError::RequestLimitExceeded(_)) => {
       warn!("AWS transient error occurred");
       Status::unavailable("please retry")
     }
     e => {
       error!("Encountered an unexpected error: {}", e);
       Status::failed_precondition("unexpected error")
     }
   }
 }