fix proto-lint and add comments

Makefile

@@ -167,7 +167,7 @@ proto-format:
 	@$(protoImage) find ./ -name "*.proto" -exec clang-format -i {} \;
 
 proto-lint:
-	@$(protoImage) buf lint --error-format=json
+	@$(protoImage) buf lint --error-format=json ./proto
 
 proto-check-breaking:
 	@$(protoImage) buf breaking --against $(HTTPS_GIT)#branch=main

proto/minievm/evm/v1/auth.proto

@@ -15,15 +15,15 @@ message ContractAccount {
   cosmos.auth.v1beta1.BaseAccount base_account = 1 [(gogoproto.embed) = true];
 }
 
-// ShorthandAccount defines an account of shorthand address 
+// ShorthandAccount defines an account of shorthand address
 // which is used to store the original long address (32bytes).
-// 
+//
 // Also it is used to check the existence of the account before
 // creating a new account.
 message ShorthandAccount {
   option (amino.name)                = "evm/ShorthandAccount";
   option (gogoproto.goproto_getters) = false;
 
-  cosmos.auth.v1beta1.BaseAccount base_account = 1 [(gogoproto.embed) = true];
-  string original_address = 2;
+  cosmos.auth.v1beta1.BaseAccount base_account     = 1 [(gogoproto.embed) = true];
+  string                          original_address = 2;
 }

proto/minievm/evm/v1/query.proto

@@ -22,10 +22,12 @@ service Query {
     option (google.api.http).get = "/minievm/evm/v1/states/{contract_addr}/{key}";
   }
 
+  // ContractAddrByDenom gets the contract address by denom.
   rpc ContractAddrByDenom(QueryContractAddrByDenomRequest) returns (QueryContractAddrByDenomResponse) {
     option (google.api.http).get = "/minievm/evm/v1/contracts/by_denom";
   }
 
+  // Denom gets the denom of the given contract address.
   rpc Denom(QueryDenomRequest) returns (QueryDenomResponse) {
     option (google.api.http).get = "/minievm/evm/v1/denoms/{contract_addr}";
   }

proto/minievm/evm/v1/tx.proto

@@ -54,7 +54,7 @@ message MsgCreate2 {
 
   // Code is hex encoded raw contract bytes code.
   string code = 2;
-  
+
   // Salt is a random value to distinguish contract creation.
   uint64 salt = 3;
 }