diff --git a/irohad/ametsuchi/block_serializer.hpp b/irohad/ametsuchi/block_serializer.hpp
index a2bf901140..b51a0c51da 100644
--- a/irohad/ametsuchi/block_serializer.hpp
+++ b/irohad/ametsuchi/block_serializer.hpp
@@ -44,6 +44,7 @@ using namespace rapidjson;
 class BlockSerializer{
  public:
   std::vector<uint8_t > serialize(model::Block block);
+  model::Block deserialize(std::vector<uint8_t > bytes);
  private:
   void serialize(PrettyWriter<StringBuffer>& writer, model::Block block);
   void serialize(PrettyWriter<StringBuffer>& writer, model::Signature signature);
diff --git a/irohad/ametsuchi/impl/block_serializer.cpp b/irohad/ametsuchi/impl/block_serializer.cpp
index 27f5ff2e5a..2cdfa642da 100644
--- a/irohad/ametsuchi/impl/block_serializer.cpp
+++ b/irohad/ametsuchi/impl/block_serializer.cpp
@@ -22,6 +22,8 @@ namespace iroha {
 
     using namespace rapidjson;
 
+    /* Serialize */
+
     std::vector<uint8_t> BlockSerializer::serialize(model::Block block) {
       rapidjson::StringBuffer sb;
       rapidjson::PrettyWriter<rapidjson::StringBuffer> writer(sb);
@@ -382,5 +384,12 @@ namespace iroha {
 
       writer.EndObject();
     }
+
+  /* Deserialize */
+
+  model::Block BlockSerializer::deserialize(std::vector<uint8_t> bytes) {
+
+  }
+
   }
 }
diff --git a/irohad/ametsuchi/wsv_query.hpp b/irohad/ametsuchi/wsv_query.hpp
index c0cfda08d8..6d0ae0d272 100644
--- a/irohad/ametsuchi/wsv_query.hpp
+++ b/irohad/ametsuchi/wsv_query.hpp
@@ -73,7 +73,7 @@ namespace iroha {
        * @param address
        * @return
        */
-      virtual nonstd::optional<model::Peer> getPeers() = 0;
+      virtual nonstd::optional<model::Peer> getPeer(const std::string &address) = 0;
     };
 
   }  // namespace ametsuchi