diff --git a/libraries/core_libs/network/include/network/tarcap/packets/latest/pillar_votes_bundle_packet.hpp b/libraries/core_libs/network/include/network/tarcap/packets/latest/pillar_votes_bundle_packet.hpp
index bf2bf1f632..eb9e4061bf 100644
--- a/libraries/core_libs/network/include/network/tarcap/packets/latest/pillar_votes_bundle_packet.hpp
+++ b/libraries/core_libs/network/include/network/tarcap/packets/latest/pillar_votes_bundle_packet.hpp
@@ -8,12 +8,9 @@
 namespace taraxa::network::tarcap {
 
 struct PillarVotesBundlePacket {
-  std::vector<std::shared_ptr<PillarVote>> pillar_votes;
+  OptimizedPillarVotesBundle pillar_votes_bundle;
 
-  void rlp(::taraxa::util::RLPDecoderRef encoding) { pillar_votes = decodePillarVotesBundleRlp(encoding.value); }
-  void rlp(::taraxa::util::RLPEncoderRef encoding) const {
-    encoding.appendRaw(encodePillarVotesBundleRlp(pillar_votes));
-  }
+  RLP_FIELDS_DEFINE_INPLACE(pillar_votes_bundle)
 };
 
 }  // namespace taraxa::network::tarcap
diff --git a/libraries/core_libs/network/src/tarcap/packets_handlers/latest/get_pillar_votes_bundle_packet_handler.cpp b/libraries/core_libs/network/src/tarcap/packets_handlers/latest/get_pillar_votes_bundle_packet_handler.cpp
index 9885cb638c..9c36e9d304 100644
--- a/libraries/core_libs/network/src/tarcap/packets_handlers/latest/get_pillar_votes_bundle_packet_handler.cpp
+++ b/libraries/core_libs/network/src/tarcap/packets_handlers/latest/get_pillar_votes_bundle_packet_handler.cpp
@@ -52,7 +52,7 @@ void GetPillarVotesBundlePacketHandler::process(GetPillarVotesBundlePacket &&pac
     for (size_t i = 0; i < chunk_size; ++i) {
       pillar_votes.emplace_back(votes[votes_sent + i]);
     }
-    PillarVotesBundlePacket pillar_votes_bundle_packet(std::move(pillar_votes));
+    PillarVotesBundlePacket pillar_votes_bundle_packet(OptimizedPillarVotesBundle{std::move(pillar_votes)});
 
     // Seal and send the chunk to the peer
     if (sealAndSend(peer->getId(), SubprotocolPacketType::kPillarVotesBundlePacket,
diff --git a/libraries/core_libs/network/src/tarcap/packets_handlers/latest/pillar_votes_bundle_packet_handler.cpp b/libraries/core_libs/network/src/tarcap/packets_handlers/latest/pillar_votes_bundle_packet_handler.cpp
index dce719e0e5..cbbf4e3177 100644
--- a/libraries/core_libs/network/src/tarcap/packets_handlers/latest/pillar_votes_bundle_packet_handler.cpp
+++ b/libraries/core_libs/network/src/tarcap/packets_handlers/latest/pillar_votes_bundle_packet_handler.cpp
@@ -14,15 +14,16 @@ PillarVotesBundlePacketHandler::PillarVotesBundlePacketHandler(
 
 void PillarVotesBundlePacketHandler::process(PillarVotesBundlePacket &&packet,
                                              const std::shared_ptr<TaraxaPeer> &peer) {
-  if (packet.pillar_votes.size() == 0 || packet.pillar_votes.size() > kMaxPillarVotesInBundleRlp) {
-    throw InvalidRlpItemsCountException("PillarVotesBundlePacket", packet.pillar_votes.size(),
+  if (packet.pillar_votes_bundle.pillar_votes.size() == 0 ||
+      packet.pillar_votes_bundle.pillar_votes.size() > kMaxPillarVotesInBundleRlp) {
+    throw InvalidRlpItemsCountException("PillarVotesBundlePacket", packet.pillar_votes_bundle.pillar_votes.size(),
                                         kMaxPillarVotesInBundleRlp);
   }
 
   // TODO[2744]: there could be the same protection as in pbft syncing that only requested bundle packet is accepted
   LOG(log_dg_) << "PillarVotesBundlePacket received from peer " << peer->getId();
 
-  for (const auto &pillar_vote : packet.pillar_votes) {
+  for (const auto &pillar_vote : packet.pillar_votes_bundle.pillar_votes) {
     if (!kConf.genesis.state.hardforks.ficus_hf.isFicusHardfork(pillar_vote->getPeriod())) {
       std::ostringstream err_msg;
       err_msg << "Synced pillar vote " << pillar_vote->getHash() << ", period " << pillar_vote->getPeriod()
diff --git a/libraries/types/vote/include/vote/votes_bundle_rlp.hpp b/libraries/types/vote/include/vote/votes_bundle_rlp.hpp
index a7a794f572..2975dc455f 100644
--- a/libraries/types/vote/include/vote/votes_bundle_rlp.hpp
+++ b/libraries/types/vote/include/vote/votes_bundle_rlp.hpp
@@ -16,6 +16,7 @@ class PillarVote;
  * @{
  */
 
+// TOOD[2865]: move to cpp file
 constexpr static size_t kPbftVotesBundleRlpSize{5};
 
 /**