diff --git a/documentation.swagger.json b/documentation.swagger.json
index b2c2215..2f30a33 100644
--- a/documentation.swagger.json
+++ b/documentation.swagger.json
@@ -11,7 +11,7 @@
   ],
   "swagger": "2.0",
   "info": {
-    "title": "service/account.proto",
+    "title": "service/accountBalance.proto",
     "version": "version not set"
   },
   "paths": {
@@ -754,7 +754,7 @@
     },
     "modelHost": {
       "type": "object",
-      "title": "Host represent",
+      "title": "Host represent node and listed peers information",
       "properties": {
         "BlacklistedPeers": {
           "type": "object",
diff --git a/model/host.proto b/model/host.proto
index 87c910b..aaa7ed2 100644
--- a/model/host.proto
+++ b/model/host.proto
@@ -7,7 +7,7 @@ option go_package = "github.com/zoobc/zoobc-core/common/model";
 import "model/node.proto";
 import "model/peer.proto";
 
-// Host represent
+// Host represent data sructure node and listed peers in node it's self 
 message Host {
 	Node Info = 1;
 	map<string, Peer> ResolvedPeers = 2;
diff --git a/model/transaction.proto b/model/transaction.proto
index f619b4d..6351323 100644
--- a/model/transaction.proto
+++ b/model/transaction.proto
@@ -84,6 +84,12 @@ message GetTransactionsResponse {
     repeated Transaction Transactions = 3;
 }
 
+// SendTransaction request in p2pCommunication service
+message SendTransactionRequest {
+    bytes TransactionBytes = 1;
+}
+
+// TODO: Currently not yet used. Should we delete it?
 message PostUnconfirmedTransactionRequest {
 	Transaction      Transaction = 1;
 	uint32 ArrivalTimestamp = 2;
diff --git a/service/p2pCommunication.proto b/service/p2pCommunication.proto
index 5c5e38c..924d042 100644
--- a/service/p2pCommunication.proto
+++ b/service/p2pCommunication.proto
@@ -7,9 +7,13 @@ option go_package = "github.com/zoobc/zoobc-core/common/service";
 import "model/peer.proto";
 import "model/node.proto";
 import "model/empty.proto";
+import "model/block.proto";
+import "model/transaction.proto";
 
 service P2PCommunication {
     rpc GetPeerInfo(model.GetPeerInfoRequest) returns (model.Node) {}
     rpc GetMorePeers(model.Empty) returns (model.GetMorePeersResponse) {}
     rpc SendPeers(model.SendPeersRequest) returns (model.Empty) {}
+    rpc SendBlock (model.Block) returns (model.Empty) {}
+    rpc SendTransaction (model.SendTransactionRequest) returns (model.Empty) {}
 }