diff --git a/core/Tron.proto b/core/Tron.proto
index d794d3083..797273ce6 100644
--- a/core/Tron.proto
+++ b/core/Tron.proto
@@ -322,9 +322,9 @@ message Transaction {
     bytes ref_block_hash = 4;
     int64 expiration = 8;
     repeated authority auths = 9;
-    // data not used
+    // transaction note
     bytes data = 10;
-    //only support size = 1,  repeated list here for extension
+    //only support size = 1, repeated list here for extension
     repeated Contract contract = 11;
     // scripts not used
     bytes scripts = 12;
@@ -333,7 +333,7 @@ message Transaction {
   }
 
   raw raw_data = 1;
-  // only support size = 1,  repeated list here for muti-sig extension
+  // only support size = 1, repeated list here for muti-sig extension
   repeated bytes signature = 2;
   repeated Result ret = 5;
 }
@@ -628,4 +628,4 @@ message NodeInfo {
       string stackTrace = 7;
     }
   }
-}
\ No newline at end of file
+}
diff --git a/core/contract/asset_issue_contract.proto b/core/contract/asset_issue_contract.proto
index f2e515e57..cdd086a2b 100644
--- a/core/contract/asset_issue_contract.proto
+++ b/core/contract/asset_issue_contract.proto
@@ -57,4 +57,4 @@ message ParticipateAssetIssueContract {
     bytes to_address = 2;
     bytes asset_name = 3; // this field is token name before the proposal ALLOW_SAME_TOKEN_NAME is active, otherwise it is token id and token is should be in string format.
     int64 amount = 4; // the amount of drops
-}
\ No newline at end of file
+}
diff --git a/core/contract/balance_contract.proto b/core/contract/balance_contract.proto
index 1ce29a0cd..07f7141f6 100644
--- a/core/contract/balance_contract.proto
+++ b/core/contract/balance_contract.proto
@@ -33,4 +33,4 @@ message TransferContract {
     bytes owner_address = 1;
     bytes to_address = 2;
     int64 amount = 3;
-}
\ No newline at end of file
+}
diff --git a/core/contract/common.proto b/core/contract/common.proto
index 561767186..933c5f5d0 100644
--- a/core/contract/common.proto
+++ b/core/contract/common.proto
@@ -9,4 +9,4 @@ option go_package = "github.com/tronprotocol/grpc-gateway/core";
 enum ResourceCode {
     BANDWIDTH = 0x00;
     ENERGY = 0x01;
-}
\ No newline at end of file
+}
diff --git a/core/contract/exchange_contract.proto b/core/contract/exchange_contract.proto
index a2f878c57..58d69cc2a 100644
--- a/core/contract/exchange_contract.proto
+++ b/core/contract/exchange_contract.proto
@@ -34,4 +34,4 @@ message ExchangeTransactionContract {
     bytes token_id = 3;
     int64 quant = 4;
     int64 expected = 5;
-}
\ No newline at end of file
+}
diff --git a/core/contract/proposal_contract.proto b/core/contract/proposal_contract.proto
index 6cd25fab0..1dc74d8f7 100644
--- a/core/contract/proposal_contract.proto
+++ b/core/contract/proposal_contract.proto
@@ -20,4 +20,4 @@ message ProposalCreateContract {
 message ProposalDeleteContract {
     bytes owner_address = 1;
     int64 proposal_id = 2;
-}
\ No newline at end of file
+}
diff --git a/core/contract/smart_contract.proto b/core/contract/smart_contract.proto
index 642264679..739abdfba 100644
--- a/core/contract/smart_contract.proto
+++ b/core/contract/smart_contract.proto
@@ -86,4 +86,4 @@ message UpdateEnergyLimitContract {
     bytes owner_address = 1;
     bytes contract_address = 2;
     int64 origin_energy_limit = 3;
-}
\ No newline at end of file
+}
diff --git a/core/contract/vote_asset_contract.proto b/core/contract/vote_asset_contract.proto
index 0ca124773..522666e47 100644
--- a/core/contract/vote_asset_contract.proto
+++ b/core/contract/vote_asset_contract.proto
@@ -11,4 +11,4 @@ message VoteAssetContract {
     repeated bytes vote_address = 2;
     bool support = 3;
     int32 count = 5;
-}
\ No newline at end of file
+}
diff --git a/core/contract/witness_contract.proto b/core/contract/witness_contract.proto
index acd4292a4..115a2128e 100644
--- a/core/contract/witness_contract.proto
+++ b/core/contract/witness_contract.proto
@@ -24,4 +24,4 @@ message VoteWitnessContract {
     bytes owner_address = 1;
     repeated Vote votes = 2;
     bool support = 3;
-}
\ No newline at end of file
+}