diff --git a/libraries/chain/include/graphene/chain/sidechain_defs.hpp b/libraries/chain/include/graphene/chain/sidechain_defs.hpp
index 38723545..df2d84cd 100644
--- a/libraries/chain/include/graphene/chain/sidechain_defs.hpp
+++ b/libraries/chain/include/graphene/chain/sidechain_defs.hpp
@@ -1,28 +1,24 @@
 #pragma once
 
 #include <fc/reflect/reflect.hpp>
-#include <fc/exception/exception.hpp>
 
 namespace graphene { namespace chain {
+
 enum class sidechain_type {
+   unknown,
    bitcoin,
+   ethereum,
+   eos,
    peerplays,
-   hive,
-   SIDECHAIN_TYPE_COUNT
+   hive
 };
 
-inline size_t sidechain_type_to_size_t(sidechain_type sidechain){ return static_cast<size_t>(sidechain); }
-
-inline sidechain_type size_t_to_sidechain_type(size_t sidechain)
-{
-   FC_ASSERT(sidechain < static_cast<size_t>(sidechain_type::SIDECHAIN_TYPE_COUNT), "Wrong sidechain_type: ${sidechain}", ("sidechain", sidechain));
-   return static_cast<sidechain_type>(sidechain);
-}
-
 } }
 
 FC_REFLECT_ENUM(graphene::chain::sidechain_type,
-        (bitcoin)
-        (peerplays)
-        (hive)
-        (SIDECHAIN_TYPE_COUNT))
+   (unknown)
+   (bitcoin)
+   (ethereum)
+   (eos)
+   (hive)
+   (peerplays) )
diff --git a/libraries/chain/include/graphene/chain/sidechain_transaction_object.hpp b/libraries/chain/include/graphene/chain/sidechain_transaction_object.hpp
index f8a4f137..30a0dd5e 100644
--- a/libraries/chain/include/graphene/chain/sidechain_transaction_object.hpp
+++ b/libraries/chain/include/graphene/chain/sidechain_transaction_object.hpp
@@ -27,7 +27,7 @@ namespace graphene { namespace chain {
          static const uint8_t type_id  = sidechain_transaction_object_type;
 
          time_point_sec timestamp;
-         sidechain_type sidechain;
+         sidechain_type sidechain = sidechain_type::unknown;
          object_id_type object_id;
          std::string transaction;
          std::vector<son_info> signers;
diff --git a/libraries/chain/include/graphene/chain/son_wallet_deposit_object.hpp b/libraries/chain/include/graphene/chain/son_wallet_deposit_object.hpp
index 642fa094..ae68a64f 100644
--- a/libraries/chain/include/graphene/chain/son_wallet_deposit_object.hpp
+++ b/libraries/chain/include/graphene/chain/son_wallet_deposit_object.hpp
@@ -19,7 +19,7 @@ namespace graphene { namespace chain {
 
          time_point_sec timestamp;
          uint32_t block_num;
-         sidechain_type sidechain;
+         sidechain_type sidechain = sidechain_type::unknown;
          std::string sidechain_uid;
          std::string sidechain_transaction_id;
          std::string sidechain_from;
diff --git a/libraries/chain/include/graphene/chain/son_wallet_withdraw_object.hpp b/libraries/chain/include/graphene/chain/son_wallet_withdraw_object.hpp
index 822a0a66..d65f5cab 100644
--- a/libraries/chain/include/graphene/chain/son_wallet_withdraw_object.hpp
+++ b/libraries/chain/include/graphene/chain/son_wallet_withdraw_object.hpp
@@ -19,7 +19,7 @@ namespace graphene { namespace chain {
 
          time_point_sec timestamp;
          uint32_t block_num;
-         sidechain_type sidechain;
+         sidechain_type sidechain = sidechain_type::unknown;
          std::string peerplays_uid;
          std::string peerplays_transaction_id;
          chain::account_id_type peerplays_from;